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Differential D13073

Add an expression parser for Go
ClosedPublic

Authored by ribrdb on Sep 22 2015, 3:12 PM.

Details

Reviewers
spyffe
jingham
Commits
rG998c8a1c1c1c: Create an expression parser for Go.
rLLDB251820: Create an expression parser for Go.
Summary

Add a parser and interpreter for go expressions.

Diff Detail

Repository
rL LLVM

Event Timeline

ribrdb updated this revision to Diff 35424.Sep 22 2015, 3:12 PM
ribrdb retitled this revision from to Add an expression parser for Go.
ribrdb updated this object.
ribrdb set the repository for this revision to rL LLVM.
ribrdb added a subscriber: lldb-commits.
ribrdb added reviewers: clayborg, jingham.Sep 23 2015, 2:21 PM
clayborg resigned from this revision.Sep 23 2015, 2:25 PM
clayborg removed a reviewer: clayborg.

We need to get Sean Callanan as a reviewer on this. Jim is out for a few weeks, so Sean will need to OK this.

clayborg added a subscriber: clayborg.Sep 23 2015, 2:29 PM

Even though clang isn't done this way for historical reason, I would like to see the Go expression parser files (.cpp and .h) over into "source/Plugins/ExpressionParser/Go". The following files should be moved:

include/lldb/Expression/GoAST.h
include/lldb/Expression/GoLexer.h
include/lldb/Expression/GoParser.h
include/lldb/Expression/GoUserExpression.h
source/Expression/GoLexer.cpp
source/Expression/GoParser.cpp
source/Expression/GoUserExpression.cpp
source/Expression/gen_go_ast.py
unittests/Expression/GoParserTest.cpp
ribrdb updated this revision to Diff 35565.Sep 23 2015, 3:47 PM
ribrdb added a reviewer: spyffe.

Moved the new files into Plugins/ExpressionParser/Go.

clayborg added a comment.Sep 23 2015, 4:10 PM

I see you moved the JIT code over into ClangUserExpression. I was wondering if all languages might not want to generate llvm IR and then let the JIT make code from the llvm IR? This is the reason were originally left the IR in the UserExpression. IR is very generic and can be applied to just about anything. Any interest in using llvm IR for the Go expression parser? I am assuming you have made a expression tree that you evaluate. This would be very similar to what we do. When we evaluate an expression currently we generate the llvm IR and then we say "that is easy to emulate (just a bunch of loads and stores), so we don't actually need to JIT it up, we can just emulate the IR. If it is too complex, we pass this along to the JIT and let it generate code for us.

ribrdb added a comment.Sep 23 2015, 4:41 PM

Hmm. I assumed you're using clang to generate llvm IR, is that not the case?
I don't really want to write a whole go compiler.
Right now I'm interpreting the AST using the ValueObject API. This also lets me reuse the error checking and things implemented in the type system. Reimplementing this in IR seems like it would be more complicated and harder to understand/maintain.
Another concern I have is that the go stack is not compatible with c. If we're going to execute jited code we'd probably also need to allocate a separate stack.

ribrdb added a comment.Sep 23 2015, 4:52 PM

I suppose JIT might make more sense if we want to implement more complicated expressions like looping and calling in to go code.
There's lots of issues to solve before we can call into go code however. In addition to the stack I'm not sure what to do about the GC. Also I believe at least some parts of the go runtime are assuming knowledge of the complete call graph and may have issues if we're calling functions from an unexpected place.
So want to just start with something simple.

ribrdb updated this revision to Diff 36293.Oct 1 2015, 1:49 PM

Merged with head.

ribrdb updated this revision to Diff 37286.Oct 13 2015, 1:53 PM

Merge

brucem added a subscriber: brucem.Oct 13 2015, 7:55 PM

Hopefully some helpful comments that will help keep this code in line with changes that we're making to other parts of the codebase in bulk ...

include/lldb/Symbol/GoASTContext.h
408

Don't need virtual here since it already has override (most of the code that has override doesn't have virtual as well).

source/Plugins/ExpressionParser/Go/GoAST.h
182

I think a lot of these destructors could be ~GoASTArrayType override = default; ? (for this and other classes here)

184

This should have override on it.

210

This should have override as well.

242

override here too and the rest of the GetKindName overrides.

2005

Could this default go away if all of the possible values for that enumeration are covered here? If so, we'd get a compile time warning here when someone adds something to the enumeration.

ribrdb updated this revision to Diff 37787.Oct 19 2015, 1:39 PM

Style updates

jingham requested changes to this revision.Oct 20 2015, 1:25 PM
jingham edited edge metadata.

So before getting into the details of the patch, there's a structural bit it would be nice to fix.

When I was separating out bits of the Expression machinery, I assumed that even though all expression parsers would use different front-ends to llvm, they would all use llvm & the llvm JIT to run the expressions. Your Go expression parser doesn't work that way. However, the correct thing to do, then, is the make UserExpression the empty base class, then what used to be in UserExpression should go in LLVMUserExpression, then ClangUserExpression derives from LLVMUserExpression, but GoUserExpression derives from UserExpression directly. That structure will make it easier to share the LLVM back end bits of expression running machinery, which really shouldn't go in ClangUserExpression since it isn't Clang specific.

Would you mind reworking it this way?

This revision now requires changes to proceed.Oct 20 2015, 1:25 PM
ribrdb updated this revision to Diff 37944.Oct 20 2015, 4:26 PM
ribrdb edited edge metadata.

Thanks for taking a look!
I moved the expression jit'ing code into LLVMUserExpression.

jingham added a comment.Oct 20 2015, 7:40 PM

The generic parts of this change look fine to me, with a few inlined style comments.

I didn't read the Go specific parts of this in detail, I assume you're going to get those right. I mentioned a couple of style things inline, though I didn't mark everywhere that they occurred. Particularly, the construct:

Foo::Foo () :

m_ivar1
, m_ivar2

etc. looks very odd, and is not the way we do it anywhere else in lldb. Please don't write it that way.

Also, we try to always call shared pointers foo_sp and unique pointers foo_up. The life cycle of these guys is enough different from pointers that it is good to be able to see what they are in code without having to trace them back to the definition.

With those style changes this is okay by me.

source/Expression/LLVMUserExpression.cpp
43–60 ↗(On Diff #37944)

Don't write initializers with the commas in front like this. We don't do it this way anywhere else in lldb, and it looks really weird...

source/Expression/UserExpression.cpp
48–54

Ditto, we don't write initializers this way. Move the commas to the end of the line.

source/Plugins/ExpressionParser/Go/GoAST.h
209–210

Same comment about formatting...

251–252

We usually postpend with _sp or _up variables that are shared or unique pointers. They have sufficiently interesting lifecycle that it is helpful to know at a glance what kind of thing they are.

263–264

Here too...

325–326

Maybe m_lhs_up, etc.

ribrdb updated this revision to Diff 38050.Oct 21 2015, 2:29 PM
ribrdb edited edge metadata.

More formatting fixes.
Also updated .clang-format to fix the settings for constructor initializers.

ribrdb added a comment.Oct 29 2015, 1:14 PM

Is this ready to submit?

source/Expression/LLVMUserExpression.cpp
43–60 ↗(On Diff #37944)

I've updated the clang-format config to fix this.

jingham accepted this revision.Oct 29 2015, 1:44 PM
jingham edited edge metadata.

Yes, that looks good.

This revision is now accepted and ready to land.Oct 29 2015, 1:44 PM
dawn closed this revision.Nov 9 2015, 1:19 PM
dawn added a subscriber: dawn.

This was committed in svn r251820.

Revision Contents

PathSize
cmake/
1 line
include/
lldb/
Expression/
57 lines
Symbol/
15 lines
lldb.xcodeproj/
28 lines
source/
API/
18 lines
Expression/
311 lines
Plugins/
ExpressionParser/
1 line
Clang/
61 lines
309 lines
Go/
5 lines
2012 lines
187 lines
375 lines
144 lines
1036 lines
96 lines
683 lines
14 lines
313 lines
Symbol/
29 lines
Target/
14 lines
test/
lang/
go/
expressions/
113 lines
21 lines
unittests/
1 line
Expression/
3 lines
221 lines

Diff 36293

cmake/LLDBDependencies.cmake

Context not available.
lldbPluginProcessElfCore lldbPluginProcessElfCore
lldbPluginJITLoaderGDB lldbPluginJITLoaderGDB
lldbPluginExpressionParserClang lldbPluginExpressionParserClang
lldbPluginExpressionParserGo
) )
# Windows-only libraries # Windows-only libraries
Context not available.

include/lldb/Expression/UserExpression.h

Context not available.
bool keep_result_in_memory, bool keep_result_in_memory,
bool generate_debug_info) = 0; bool generate_debug_info) = 0;
bool virtual bool
CanInterpret () CanInterpret () = 0;
{
return m_can_interpret;
}
bool bool
MatchesContext (ExecutionContext &exe_ctx); MatchesContext (ExecutionContext &exe_ctx);
Context not available.
/// @return /// @return
/// A Process::Execution results value. /// A Process::Execution results value.
//------------------------------------------------------------------ //------------------------------------------------------------------
lldb::ExpressionResults virtual lldb::ExpressionResults
Execute (Stream &error_stream, Execute (Stream &error_stream,
ExecutionContext &exe_ctx, ExecutionContext &exe_ctx,
const EvaluateExpressionOptions& options, const EvaluateExpressionOptions& options,
lldb::UserExpressionSP &shared_ptr_to_me, lldb::UserExpressionSP &shared_ptr_to_me,
lldb::ExpressionVariableSP &result); lldb::ExpressionVariableSP &result) = 0;
//------------------------------------------------------------------ //------------------------------------------------------------------
/// Apply the side effects of the function to program state. /// Apply the side effects of the function to program state.
Context not available.
/// @return /// @return
/// A Process::Execution results value. /// A Process::Execution results value.
//------------------------------------------------------------------ //------------------------------------------------------------------
bool virtual bool
FinalizeJITExecution (Stream &error_stream, FinalizeJITExecution (Stream &error_stream,
ExecutionContext &exe_ctx, ExecutionContext &exe_ctx,
lldb::ExpressionVariableSP &result, lldb::ExpressionVariableSP &result,
lldb::addr_t function_stack_bottom = LLDB_INVALID_ADDRESS, lldb::addr_t function_stack_bottom = LLDB_INVALID_ADDRESS,
lldb::addr_t function_stack_top = LLDB_INVALID_ADDRESS); lldb::addr_t function_stack_top = LLDB_INVALID_ADDRESS) = 0;
//------------------------------------------------------------------ //------------------------------------------------------------------
/// Return the string that the parser should parse. Must be a full /// Return the string that the parser should parse.
/// translation unit.
//------------------------------------------------------------------ //------------------------------------------------------------------
const char * const char *
Text() override Text() override
{ {
return m_transformed_text.c_str(); return m_expr_text.c_str();
} }
//------------------------------------------------------------------ //------------------------------------------------------------------
Context not available.
/// Populate m_in_cplusplus_method and m_in_objectivec_method based on the environment. /// Populate m_in_cplusplus_method and m_in_objectivec_method based on the environment.
//------------------------------------------------------------------ //------------------------------------------------------------------
virtual void
ScanContext (ExecutionContext &exe_ctx,
lldb_private::Error &err) = 0;
bool
PrepareToExecuteJITExpression (Stream &error_stream,
ExecutionContext &exe_ctx,
lldb::addr_t &struct_address);
virtual bool
AddInitialArguments (ExecutionContext &exe_ctx,
std::vector<lldb::addr_t> &args,
Stream &error_stream)
{
return true;
}
void void
InstallContext (ExecutionContext &exe_ctx); InstallContext (ExecutionContext &exe_ctx);
Context not available.
lldb::StackFrameSP &frame_sp); lldb::StackFrameSP &frame_sp);
Address m_address; ///< The address the process is stopped in. Address m_address; ///< The address the process is stopped in.
lldb::addr_t m_stack_frame_bottom; ///< The bottom of the allocated stack frame.
lldb::addr_t m_stack_frame_top; ///< The top of the allocated stack frame.
std::string m_expr_text; ///< The text of the expression, as typed by the user std::string m_expr_text; ///< The text of the expression, as typed by the user
std::string m_expr_prefix; ///< The text of the translation-level definitions, as provided by the user std::string m_expr_prefix; ///< The text of the translation-level definitions, as provided by the user
lldb::LanguageType m_language; ///< The language to use when parsing (eLanguageTypeUnknown means use defaults) lldb::LanguageType m_language; ///< The language to use when parsing (eLanguageTypeUnknown means use defaults)
bool m_allow_cxx; ///< True if the language allows C++.
bool m_allow_objc; ///< True if the language allows Objective-C.
std::string m_transformed_text; ///< The text of the expression, as send to the parser
ResultType m_desired_type; ///< The type to coerce the expression's result to. If eResultTypeAny, inferred from the expression. ResultType m_desired_type; ///< The type to coerce the expression's result to. If eResultTypeAny, inferred from the expression.
std::shared_ptr<IRExecutionUnit> m_execution_unit_sp; ///< The execution unit the expression is stored in.
std::unique_ptr<Materializer> m_materializer_ap; ///< The materializer to use when running the expression.
lldb::ModuleWP m_jit_module_wp;
bool m_enforce_valid_object; ///< True if the expression parser should enforce the presence of a valid class pointer in order to generate the expression as a method.
bool m_in_cplusplus_method; ///< True if the expression is compiled as a C++ member function (true if it was parsed when exe_ctx was in a C++ method).
bool m_in_objectivec_method; ///< True if the expression is compiled as an Objective-C method (true if it was parsed when exe_ctx was in an Objective-C method).
bool m_in_static_method; ///< True if the expression is compiled as a static (or class) method (currently true if it was parsed when exe_ctx was in an Objective-C class method).
bool m_needs_object_ptr; ///< True if "this" or "self" must be looked up and passed in. False if the expression doesn't really use them and they can be NULL.
bool m_const_object; ///< True if "this" is const.
Target *m_target; ///< The target for storing persistent data like types and variables.
bool m_can_interpret; ///< True if the expression could be evaluated statically; false otherwise.
lldb::addr_t m_materialized_address; ///< The address at which the arguments to the expression have been materialized.
Materializer::DematerializerSP m_dematerializer_sp; ///< The dematerializer.
}; };
} // namespace lldb_private } // namespace lldb_private
Context not available.

include/lldb/Symbol/GoASTContext.h

Context not available.
GoASTContext(const GoASTContext &) = delete; GoASTContext(const GoASTContext &) = delete;
const GoASTContext &operator=(const GoASTContext &) = delete; const GoASTContext &operator=(const GoASTContext &) = delete;
}; };
}
class GoASTContextForExpr : public GoASTContext
{
public:
GoASTContextForExpr(lldb::TargetSP target)
: m_target_wp(target)
{
}
virtual UserExpression *GetUserExpression(const char *expr, const char *expr_prefix, lldb::LanguageType language,
Expression::ResultType desired_type) override;
private:
lldb::TargetWP m_target_wp;
};
}
#endif /* defined(__lldb__GoASTContext__) */ #endif /* defined(__lldb__GoASTContext__) */
Context not available.
brucemUnsubmitted
Not Done
ReplyInline Actions

Don't need virtual here since it already has override (most of the code that has override doesn't have virtual as well).

brucem: Don't need `virtual` here since it already has `override` (most of the code that has `override`…

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lldb::DynamicValueType fetch_dynamic_value = frame->CalculateTarget()->GetPreferDynamicValue(); lldb::DynamicValueType fetch_dynamic_value = frame->CalculateTarget()->GetPreferDynamicValue();
options.SetFetchDynamicValue (fetch_dynamic_value); options.SetFetchDynamicValue (fetch_dynamic_value);
options.SetUnwindOnError (true); options.SetUnwindOnError (true);
if (target->GetLanguage() != eLanguageTypeUnknown)
options.SetLanguage(target->GetLanguage());
else
options.SetLanguage(frame->GetLanguage());
return EvaluateExpression (expr, options); return EvaluateExpression (expr, options);
} }
return result; return result;
Context not available.
SBExpressionOptions options; SBExpressionOptions options;
options.SetFetchDynamicValue (fetch_dynamic_value); options.SetFetchDynamicValue (fetch_dynamic_value);
options.SetUnwindOnError (true); options.SetUnwindOnError (true);
ExecutionContext exe_ctx(m_opaque_sp.get());
StackFrame *frame = exe_ctx.GetFramePtr();
Target *target = exe_ctx.GetTargetPtr();
if (target && target->GetLanguage() != eLanguageTypeUnknown)
options.SetLanguage(target->GetLanguage());
else if (frame)
options.SetLanguage(frame->GetLanguage());
return EvaluateExpression (expr, options); return EvaluateExpression (expr, options);
} }
Context not available.
SBFrame::EvaluateExpression (const char *expr, lldb::DynamicValueType fetch_dynamic_value, bool unwind_on_error) SBFrame::EvaluateExpression (const char *expr, lldb::DynamicValueType fetch_dynamic_value, bool unwind_on_error)
{ {
SBExpressionOptions options; SBExpressionOptions options;
ExecutionContext exe_ctx(m_opaque_sp.get());
options.SetFetchDynamicValue (fetch_dynamic_value); options.SetFetchDynamicValue (fetch_dynamic_value);
options.SetUnwindOnError (unwind_on_error); options.SetUnwindOnError (unwind_on_error);
StackFrame *frame = exe_ctx.GetFramePtr();
Target *target = exe_ctx.GetTargetPtr();
if (target && target->GetLanguage() != eLanguageTypeUnknown)
options.SetLanguage(target->GetLanguage());
else if (frame)
options.SetLanguage(frame->GetLanguage());
return EvaluateExpression (expr, options); return EvaluateExpression (expr, options);
} }
Context not available.

source/Expression/UserExpression.cpp

Context not available.
lldb::LanguageType language, lldb::LanguageType language,
ResultType desired_type) : ResultType desired_type) :
Expression (exe_scope), Expression (exe_scope),
m_stack_frame_bottom (LLDB_INVALID_ADDRESS),
m_stack_frame_top (LLDB_INVALID_ADDRESS),
m_expr_text (expr), m_expr_text (expr),
m_expr_prefix (expr_prefix ? expr_prefix : ""), m_expr_prefix (expr_prefix ? expr_prefix : ""),
m_language (language), m_language (language),
m_transformed_text (), m_desired_type (desired_type)
m_desired_type (desired_type),
m_execution_unit_sp(),
m_materializer_ap(),
m_jit_module_wp(),
m_enforce_valid_object (true),
m_in_cplusplus_method (false),
m_in_objectivec_method (false),
m_in_static_method(false),
m_needs_object_ptr (false),
m_const_object (false),
m_target (NULL),
m_can_interpret (false),
m_materialized_address (LLDB_INVALID_ADDRESS)
{ {
} }
UserExpression::~UserExpression () UserExpression::~UserExpression ()
{ {
if (m_target)
{
lldb::ModuleSP jit_module_sp (m_jit_module_wp.lock());
if (jit_module_sp)
m_target->GetImages().Remove(jit_module_sp);
}
} }
void void
Context not available.
return ret; return ret;
} }
bool
UserExpression::PrepareToExecuteJITExpression (Stream &error_stream,
ExecutionContext &exe_ctx,
lldb::addr_t &struct_address)
{
lldb::TargetSP target;
lldb::ProcessSP process;
lldb::StackFrameSP frame;
if (!LockAndCheckContext(exe_ctx,
target,
process,
frame))
{
error_stream.Printf("The context has changed before we could JIT the expression!\n");
return false;
}
if (m_jit_start_addr != LLDB_INVALID_ADDRESS || m_can_interpret)
{
if (m_materialized_address == LLDB_INVALID_ADDRESS)
{
Error alloc_error;
IRMemoryMap::AllocationPolicy policy = m_can_interpret ? IRMemoryMap::eAllocationPolicyHostOnly : IRMemoryMap::eAllocationPolicyMirror;
m_materialized_address = m_execution_unit_sp->Malloc(m_materializer_ap->GetStructByteSize(),
m_materializer_ap->GetStructAlignment(),
lldb::ePermissionsReadable | lldb::ePermissionsWritable,
policy,
alloc_error);
if (!alloc_error.Success())
{
error_stream.Printf("Couldn't allocate space for materialized struct: %s\n", alloc_error.AsCString());
return false;
}
}
struct_address = m_materialized_address;
if (m_can_interpret && m_stack_frame_bottom == LLDB_INVALID_ADDRESS)
{
Error alloc_error;
const size_t stack_frame_size = 512 * 1024;
m_stack_frame_bottom = m_execution_unit_sp->Malloc(stack_frame_size,
8,
lldb::ePermissionsReadable | lldb::ePermissionsWritable,
IRMemoryMap::eAllocationPolicyHostOnly,
alloc_error);
m_stack_frame_top = m_stack_frame_bottom + stack_frame_size;
if (!alloc_error.Success())
{
error_stream.Printf("Couldn't allocate space for the stack frame: %s\n", alloc_error.AsCString());
return false;
}
}
Error materialize_error;
m_dematerializer_sp = m_materializer_ap->Materialize(frame, *m_execution_unit_sp, struct_address, materialize_error);
if (!materialize_error.Success())
{
error_stream.Printf("Couldn't materialize: %s\n", materialize_error.AsCString());
return false;
}
}
return true;
}
bool
UserExpression::FinalizeJITExecution (Stream &error_stream,
ExecutionContext &exe_ctx,
lldb::ExpressionVariableSP &result,
lldb::addr_t function_stack_bottom,
lldb::addr_t function_stack_top)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (log)
log->Printf("-- [UserExpression::FinalizeJITExecution] Dematerializing after execution --");
if (!m_dematerializer_sp)
{
error_stream.Printf ("Couldn't apply expression side effects : no dematerializer is present");
return false;
}
Error dematerialize_error;
m_dematerializer_sp->Dematerialize(dematerialize_error, result, function_stack_bottom, function_stack_top);
if (!dematerialize_error.Success())
{
error_stream.Printf ("Couldn't apply expression side effects : %s\n", dematerialize_error.AsCString("unknown error"));
return false;
}
if (result)
result->TransferAddress();
m_dematerializer_sp.reset();
return true;
}
lldb::ExpressionResults
UserExpression::Execute (Stream &error_stream,
ExecutionContext &exe_ctx,
const EvaluateExpressionOptions& options,
lldb::UserExpressionSP &shared_ptr_to_me,
lldb::ExpressionVariableSP &result)
{
// The expression log is quite verbose, and if you're just tracking the execution of the
// expression, it's quite convenient to have these logs come out with the STEP log as well.
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_EXPRESSIONS | LIBLLDB_LOG_STEP));
if (m_jit_start_addr != LLDB_INVALID_ADDRESS || m_can_interpret)
{
lldb::addr_t struct_address = LLDB_INVALID_ADDRESS;
if (!PrepareToExecuteJITExpression (error_stream, exe_ctx, struct_address))
{
error_stream.Printf("Errored out in %s, couldn't PrepareToExecuteJITExpression", __FUNCTION__);
return lldb::eExpressionSetupError;
}
lldb::addr_t function_stack_bottom = LLDB_INVALID_ADDRESS;
lldb::addr_t function_stack_top = LLDB_INVALID_ADDRESS;
if (m_can_interpret)
{
llvm::Module *module = m_execution_unit_sp->GetModule();
llvm::Function *function = m_execution_unit_sp->GetFunction();
if (!module || !function)
{
error_stream.Printf("Supposed to interpret, but nothing is there");
return lldb::eExpressionSetupError;
}
Error interpreter_error;
std::vector<lldb::addr_t> args;
if (!AddInitialArguments(exe_ctx, args, error_stream))
{
error_stream.Printf ("Errored out in %s, couldn't AddInitialArguments", __FUNCTION__);
return lldb::eExpressionSetupError;
}
args.push_back(struct_address);
function_stack_bottom = m_stack_frame_bottom;
function_stack_top = m_stack_frame_top;
IRInterpreter::Interpret (*module,
*function,
args,
*m_execution_unit_sp.get(),
interpreter_error,
function_stack_bottom,
function_stack_top,
exe_ctx);
if (!interpreter_error.Success())
{
error_stream.Printf("Supposed to interpret, but failed: %s", interpreter_error.AsCString());
return lldb::eExpressionDiscarded;
}
}
else
{
if (!exe_ctx.HasThreadScope())
{
error_stream.Printf("UserExpression::Execute called with no thread selected.");
return lldb::eExpressionSetupError;
}
Address wrapper_address (m_jit_start_addr);
std::vector<lldb::addr_t> args;
if (!AddInitialArguments(exe_ctx, args, error_stream))
{
error_stream.Printf ("Errored out in %s, couldn't AddInitialArguments", __FUNCTION__);
return lldb::eExpressionSetupError;
}
args.push_back(struct_address);
lldb::ThreadPlanSP call_plan_sp(new ThreadPlanCallUserExpression (exe_ctx.GetThreadRef(),
wrapper_address,
args,
options,
shared_ptr_to_me));
if (!call_plan_sp || !call_plan_sp->ValidatePlan (&error_stream))
return lldb::eExpressionSetupError;
ThreadPlanCallUserExpression *user_expression_plan = static_cast<ThreadPlanCallUserExpression *>(call_plan_sp.get());
lldb::addr_t function_stack_pointer = user_expression_plan->GetFunctionStackPointer();
function_stack_bottom = function_stack_pointer - HostInfo::GetPageSize();
function_stack_top = function_stack_pointer;
if (log)
log->Printf("-- [UserExpression::Execute] Execution of expression begins --");
if (exe_ctx.GetProcessPtr())
exe_ctx.GetProcessPtr()->SetRunningUserExpression(true);
lldb::ExpressionResults execution_result = exe_ctx.GetProcessRef().RunThreadPlan (exe_ctx,
call_plan_sp,
options,
error_stream);
if (exe_ctx.GetProcessPtr())
exe_ctx.GetProcessPtr()->SetRunningUserExpression(false);
if (log)
log->Printf("-- [UserExpression::Execute] Execution of expression completed --");
if (execution_result == lldb::eExpressionInterrupted || execution_result == lldb::eExpressionHitBreakpoint)
{
const char *error_desc = NULL;
if (call_plan_sp)
{
lldb::StopInfoSP real_stop_info_sp = call_plan_sp->GetRealStopInfo();
if (real_stop_info_sp)
error_desc = real_stop_info_sp->GetDescription();
}
if (error_desc)
error_stream.Printf ("Execution was interrupted, reason: %s.", error_desc);
else
error_stream.PutCString ("Execution was interrupted.");
if ((execution_result == lldb::eExpressionInterrupted && options.DoesUnwindOnError())
|| (execution_result == lldb::eExpressionHitBreakpoint && options.DoesIgnoreBreakpoints()))
error_stream.PutCString ("\nThe process has been returned to the state before expression evaluation.");
else
{
if (execution_result == lldb::eExpressionHitBreakpoint)
user_expression_plan->TransferExpressionOwnership();
error_stream.PutCString ("\nThe process has been left at the point where it was interrupted, "
"use \"thread return -x\" to return to the state before expression evaluation.");
}
return execution_result;
}
else if (execution_result == lldb::eExpressionStoppedForDebug)
{
error_stream.PutCString ("Execution was halted at the first instruction of the expression "
"function because \"debug\" was requested.\n"
"Use \"thread return -x\" to return to the state before expression evaluation.");
return execution_result;
}
else if (execution_result != lldb::eExpressionCompleted)
{
error_stream.Printf ("Couldn't execute function; result was %s\n", Process::ExecutionResultAsCString (execution_result));
return execution_result;
}
}
if (FinalizeJITExecution (error_stream, exe_ctx, result, function_stack_bottom, function_stack_top))
{
return lldb::eExpressionCompleted;
}
else
{
return lldb::eExpressionResultUnavailable;
}
}
else
{
error_stream.Printf("Expression can't be run, because there is no JIT compiled function");
return lldb::eExpressionSetupError;
}
}
lldb::ExpressionResults lldb::ExpressionResults
UserExpression::Evaluate (ExecutionContext &exe_ctx, UserExpression::Evaluate (ExecutionContext &exe_ctx,
const EvaluateExpressionOptions& options, const EvaluateExpressionOptions& options,
Context not available.

source/Plugins/ExpressionParser/CMakeLists.txt

add_subdirectory(Clang) add_subdirectory(Clang)
add_subdirectory(Go)

source/Plugins/ExpressionParser/Clang/ClangUserExpression.h

Context not available.
lldb_private::ExecutionPolicy execution_policy, lldb_private::ExecutionPolicy execution_policy,
bool keep_result_in_memory, bool keep_result_in_memory,
bool generate_debug_info) override; bool generate_debug_info) override;
lldb::ExpressionResults
Execute (Stream &error_stream,
ExecutionContext &exe_ctx,
const EvaluateExpressionOptions& options,
lldb::UserExpressionSP &shared_ptr_to_me,
lldb::ExpressionVariableSP &result) override;
bool
FinalizeJITExecution (Stream &error_stream,
ExecutionContext &exe_ctx,
lldb::ExpressionVariableSP &result,
lldb::addr_t function_stack_bottom = LLDB_INVALID_ADDRESS,
lldb::addr_t function_stack_top = LLDB_INVALID_ADDRESS) override;
bool
CanInterpret () override
{
return m_can_interpret;
}
//------------------------------------------------------------------
/// Return the string that the parser should parse. Must be a full
/// translation unit.
//------------------------------------------------------------------
const char *
Text() override
{
return m_transformed_text.c_str();
}
ExpressionTypeSystemHelper * ExpressionTypeSystemHelper *
GetTypeSystemHelper () override GetTypeSystemHelper () override
Context not available.
/// Populate m_in_cplusplus_method and m_in_objectivec_method based on the environment. /// Populate m_in_cplusplus_method and m_in_objectivec_method based on the environment.
//------------------------------------------------------------------ //------------------------------------------------------------------
bool
PrepareToExecuteJITExpression (Stream &error_stream,
ExecutionContext &exe_ctx,
lldb::addr_t &struct_address);
void void
ScanContext (ExecutionContext &exe_ctx, ScanContext (ExecutionContext &exe_ctx,
lldb_private::Error &err) override; lldb_private::Error &err);
bool bool
AddInitialArguments (ExecutionContext &exe_ctx, AddInitialArguments (ExecutionContext &exe_ctx,
std::vector<lldb::addr_t> &args, std::vector<lldb::addr_t> &args,
Stream &error_stream) override; Stream &error_stream);
lldb::addr_t m_stack_frame_bottom; ///< The bottom of the allocated stack frame.
lldb::addr_t m_stack_frame_top; ///< The top of the allocated stack frame.
bool m_allow_cxx; ///< True if the language allows C++.
bool m_allow_objc; ///< True if the language allows Objective-C.
std::string m_transformed_text; ///< The text of the expression, as send to the parser
std::shared_ptr<IRExecutionUnit> m_execution_unit_sp; ///< The execution unit the expression is stored in.
std::unique_ptr<Materializer> m_materializer_ap; ///< The materializer to use when running the expression.
lldb::ModuleWP m_jit_module_wp;
bool m_enforce_valid_object; ///< True if the expression parser should enforce the presence of a valid class pointer in order to generate the expression as a method.
bool m_in_cplusplus_method; ///< True if the expression is compiled as a C++ member function (true if it was parsed when exe_ctx was in a C++ method).
bool m_in_objectivec_method; ///< True if the expression is compiled as an Objective-C method (true if it was parsed when exe_ctx was in an Objective-C method).
bool m_in_static_method; ///< True if the expression is compiled as a static (or class) method (currently true if it was parsed when exe_ctx was in an Objective-C class method).
bool m_needs_object_ptr; ///< True if "this" or "self" must be looked up and passed in. False if the expression doesn't really use them and they can be NULL.
bool m_const_object; ///< True if "this" is const.
Target *m_target; ///< The target for storing persistent data like types and variables.
bool m_can_interpret; ///< True if the expression could be evaluated statically; false otherwise.
lldb::addr_t m_materialized_address; ///< The address at which the arguments to the expression have been materialized.
Materializer::DematerializerSP m_dematerializer_sp; ///< The dematerializer.
ClangUserExpressionHelper m_type_system_helper; ClangUserExpressionHelper m_type_system_helper;
}; };
Context not available.

source/Plugins/ExpressionParser/Clang/ClangUserExpression.cpp

Context not available.
lldb::LanguageType language, lldb::LanguageType language,
ResultType desired_type) : ResultType desired_type) :
UserExpression (exe_scope, expr, expr_prefix, language, desired_type), UserExpression (exe_scope, expr, expr_prefix, language, desired_type),
m_stack_frame_bottom (LLDB_INVALID_ADDRESS),
m_stack_frame_top (LLDB_INVALID_ADDRESS),
m_transformed_text (),
m_execution_unit_sp(),
m_materializer_ap(),
m_jit_module_wp(),
m_enforce_valid_object (true),
m_in_cplusplus_method (false),
m_in_objectivec_method (false),
m_in_static_method(false),
m_needs_object_ptr (false),
m_const_object (false),
m_target (NULL),
m_can_interpret (false),
m_materialized_address (LLDB_INVALID_ADDRESS),
m_type_system_helper(*m_target_wp.lock().get()) m_type_system_helper(*m_target_wp.lock().get())
{ {
switch (m_language) switch (m_language)
Context not available.
ClangUserExpression::~ClangUserExpression () ClangUserExpression::~ClangUserExpression ()
{ {
if (m_target)
{
lldb::ModuleSP jit_module_sp (m_jit_module_wp.lock());
if (jit_module_sp)
m_target->GetImages().Remove(jit_module_sp);
}
} }
void void
Context not available.
return m_result_synthesizer_up.get(); return m_result_synthesizer_up.get();
} }
lldb::ExpressionResults
ClangUserExpression::Execute (Stream &error_stream,
ExecutionContext &exe_ctx,
const EvaluateExpressionOptions& options,
lldb::UserExpressionSP &shared_ptr_to_me,
lldb::ExpressionVariableSP &result)
{
// The expression log is quite verbose, and if you're just tracking the execution of the
// expression, it's quite convenient to have these logs come out with the STEP log as well.
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_EXPRESSIONS | LIBLLDB_LOG_STEP));
if (m_jit_start_addr != LLDB_INVALID_ADDRESS || m_can_interpret)
{
lldb::addr_t struct_address = LLDB_INVALID_ADDRESS;
if (!PrepareToExecuteJITExpression (error_stream, exe_ctx, struct_address))
{
error_stream.Printf("Errored out in %s, couldn't PrepareToExecuteJITExpression", __FUNCTION__);
return lldb::eExpressionSetupError;
}
lldb::addr_t function_stack_bottom = LLDB_INVALID_ADDRESS;
lldb::addr_t function_stack_top = LLDB_INVALID_ADDRESS;
if (m_can_interpret)
{
llvm::Module *module = m_execution_unit_sp->GetModule();
llvm::Function *function = m_execution_unit_sp->GetFunction();
if (!module || !function)
{
error_stream.Printf("Supposed to interpret, but nothing is there");
return lldb::eExpressionSetupError;
}
Error interpreter_error;
std::vector<lldb::addr_t> args;
if (!AddInitialArguments(exe_ctx, args, error_stream))
{
error_stream.Printf ("Errored out in %s, couldn't AddInitialArguments", __FUNCTION__);
return lldb::eExpressionSetupError;
}
args.push_back(struct_address);
function_stack_bottom = m_stack_frame_bottom;
function_stack_top = m_stack_frame_top;
IRInterpreter::Interpret (*module,
*function,
args,
*m_execution_unit_sp.get(),
interpreter_error,
function_stack_bottom,
function_stack_top,
exe_ctx);
if (!interpreter_error.Success())
{
error_stream.Printf("Supposed to interpret, but failed: %s", interpreter_error.AsCString());
return lldb::eExpressionDiscarded;
}
}
else
{
if (!exe_ctx.HasThreadScope())
{
error_stream.Printf("UserExpression::Execute called with no thread selected.");
return lldb::eExpressionSetupError;
}
Address wrapper_address (m_jit_start_addr);
std::vector<lldb::addr_t> args;
if (!AddInitialArguments(exe_ctx, args, error_stream))
{
error_stream.Printf ("Errored out in %s, couldn't AddInitialArguments", __FUNCTION__);
return lldb::eExpressionSetupError;
}
args.push_back(struct_address);
lldb::ThreadPlanSP call_plan_sp(new ThreadPlanCallUserExpression (exe_ctx.GetThreadRef(),
wrapper_address,
args,
options,
shared_ptr_to_me));
if (!call_plan_sp || !call_plan_sp->ValidatePlan (&error_stream))
return lldb::eExpressionSetupError;
ThreadPlanCallUserExpression *user_expression_plan = static_cast<ThreadPlanCallUserExpression *>(call_plan_sp.get());
lldb::addr_t function_stack_pointer = user_expression_plan->GetFunctionStackPointer();
function_stack_bottom = function_stack_pointer - HostInfo::GetPageSize();
function_stack_top = function_stack_pointer;
if (log)
log->Printf("-- [UserExpression::Execute] Execution of expression begins --");
if (exe_ctx.GetProcessPtr())
exe_ctx.GetProcessPtr()->SetRunningUserExpression(true);
lldb::ExpressionResults execution_result = exe_ctx.GetProcessRef().RunThreadPlan (exe_ctx,
call_plan_sp,
options,
error_stream);
if (exe_ctx.GetProcessPtr())
exe_ctx.GetProcessPtr()->SetRunningUserExpression(false);
if (log)
log->Printf("-- [UserExpression::Execute] Execution of expression completed --");
if (execution_result == lldb::eExpressionInterrupted || execution_result == lldb::eExpressionHitBreakpoint)
{
const char *error_desc = NULL;
if (call_plan_sp)
{
lldb::StopInfoSP real_stop_info_sp = call_plan_sp->GetRealStopInfo();
if (real_stop_info_sp)
error_desc = real_stop_info_sp->GetDescription();
}
if (error_desc)
error_stream.Printf ("Execution was interrupted, reason: %s.", error_desc);
else
error_stream.PutCString ("Execution was interrupted.");
if ((execution_result == lldb::eExpressionInterrupted && options.DoesUnwindOnError())
|| (execution_result == lldb::eExpressionHitBreakpoint && options.DoesIgnoreBreakpoints()))
error_stream.PutCString ("\nThe process has been returned to the state before expression evaluation.");
else
{
if (execution_result == lldb::eExpressionHitBreakpoint)
user_expression_plan->TransferExpressionOwnership();
error_stream.PutCString ("\nThe process has been left at the point where it was interrupted, "
"use \"thread return -x\" to return to the state before expression evaluation.");
}
return execution_result;
}
else if (execution_result == lldb::eExpressionStoppedForDebug)
{
error_stream.PutCString ("Execution was halted at the first instruction of the expression "
"function because \"debug\" was requested.\n"
"Use \"thread return -x\" to return to the state before expression evaluation.");
return execution_result;
}
else if (execution_result != lldb::eExpressionCompleted)
{
error_stream.Printf ("Couldn't execute function; result was %s\n", Process::ExecutionResultAsCString (execution_result));
return execution_result;
}
}
if (FinalizeJITExecution (error_stream, exe_ctx, result, function_stack_bottom, function_stack_top))
{
return lldb::eExpressionCompleted;
}
else
{
return lldb::eExpressionResultUnavailable;
}
}
else
{
error_stream.Printf("Expression can't be run, because there is no JIT compiled function");
return lldb::eExpressionSetupError;
}
}
bool
ClangUserExpression::FinalizeJITExecution (Stream &error_stream,
ExecutionContext &exe_ctx,
lldb::ExpressionVariableSP &result,
lldb::addr_t function_stack_bottom,
lldb::addr_t function_stack_top)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (log)
log->Printf("-- [UserExpression::FinalizeJITExecution] Dematerializing after execution --");
if (!m_dematerializer_sp)
{
error_stream.Printf ("Couldn't apply expression side effects : no dematerializer is present");
return false;
}
Error dematerialize_error;
m_dematerializer_sp->Dematerialize(dematerialize_error, result, function_stack_bottom, function_stack_top);
if (!dematerialize_error.Success())
{
error_stream.Printf ("Couldn't apply expression side effects : %s\n", dematerialize_error.AsCString("unknown error"));
return false;
}
if (result)
result->TransferAddress();
m_dematerializer_sp.reset();
return true;
}
bool
ClangUserExpression::PrepareToExecuteJITExpression (Stream &error_stream,
ExecutionContext &exe_ctx,
lldb::addr_t &struct_address)
{
lldb::TargetSP target;
lldb::ProcessSP process;
lldb::StackFrameSP frame;
if (!LockAndCheckContext(exe_ctx,
target,
process,
frame))
{
error_stream.Printf("The context has changed before we could JIT the expression!\n");
return false;
}
if (m_jit_start_addr != LLDB_INVALID_ADDRESS || m_can_interpret)
{
if (m_materialized_address == LLDB_INVALID_ADDRESS)
{
Error alloc_error;
IRMemoryMap::AllocationPolicy policy = m_can_interpret ? IRMemoryMap::eAllocationPolicyHostOnly : IRMemoryMap::eAllocationPolicyMirror;
m_materialized_address = m_execution_unit_sp->Malloc(m_materializer_ap->GetStructByteSize(),
m_materializer_ap->GetStructAlignment(),
lldb::ePermissionsReadable | lldb::ePermissionsWritable,
policy,
alloc_error);
if (!alloc_error.Success())
{
error_stream.Printf("Couldn't allocate space for materialized struct: %s\n", alloc_error.AsCString());
return false;
}
}
struct_address = m_materialized_address;
if (m_can_interpret && m_stack_frame_bottom == LLDB_INVALID_ADDRESS)
{
Error alloc_error;
const size_t stack_frame_size = 512 * 1024;
m_stack_frame_bottom = m_execution_unit_sp->Malloc(stack_frame_size,
8,
lldb::ePermissionsReadable | lldb::ePermissionsWritable,
IRMemoryMap::eAllocationPolicyHostOnly,
alloc_error);
m_stack_frame_top = m_stack_frame_bottom + stack_frame_size;
if (!alloc_error.Success())
{
error_stream.Printf("Couldn't allocate space for the stack frame: %s\n", alloc_error.AsCString());
return false;
}
}
Error materialize_error;
m_dematerializer_sp = m_materializer_ap->Materialize(frame, *m_execution_unit_sp, struct_address, materialize_error);
if (!materialize_error.Success())
{
error_stream.Printf("Couldn't materialize: %s\n", materialize_error.AsCString());
return false;
}
}
return true;
}
Context not available.

source/Plugins/ExpressionParser/Go/CMakeLists.txt

  • This file was added.
add_lldb_library(lldbPluginExpressionParserGo
GoLexer.cpp
GoParser.cpp
GoUserExpression.cpp
)

source/Plugins/ExpressionParser/Go/GoAST.h

  • This file was added.
//===-- GoAST.h -------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// DO NOT EDIT.
// Generated by gen_go_ast.py
#ifndef liblldb_GoAST_h
#define liblldb_GoAST_h
#include "lldb/lldb-forward.h"
#include "lldb/lldb-private.h"
#include "llvm/Support/Casting.h"
#include "Plugins/ExpressionParser/Go/GoLexer.h"
namespace lldb_private {
class GoASTNode {
public:
typedef GoLexer::TokenType TokenType;
typedef GoLexer::Token Token;
enum ChanDir {
eChanBidir,
eChanSend,
eChanRecv,
};
enum NodeKind
{
eBadDecl,
eFuncDecl,
eGenDecl,
eArrayType,
eBadExpr,
eBasicLit,
eBinaryExpr,
eIdent,
eCallExpr,
eChanType,
eCompositeLit,
eEllipsis,
eFuncType,
eFuncLit,
eIndexExpr,
eInterfaceType,
eKeyValueExpr,
eMapType,
eParenExpr,
eSelectorExpr,
eSliceExpr,
eStarExpr,
eStructType,
eTypeAssertExpr,
eUnaryExpr,
eImportSpec,
eTypeSpec,
eValueSpec,
eAssignStmt,
eBadStmt,
eBlockStmt,
eBranchStmt,
eCaseClause,
eCommClause,
eDeclStmt,
eDeferStmt,
eEmptyStmt,
eExprStmt,
eForStmt,
eGoStmt,
eIfStmt,
eIncDecStmt,
eLabeledStmt,
eRangeStmt,
eReturnStmt,
eSelectStmt,
eSendStmt,
eSwitchStmt,
eTypeSwitchStmt,
eField,
eFieldList,
};
virtual ~GoASTNode() { }
NodeKind GetKind() const { return m_kind; }
virtual const char* GetKindName() const = 0;
template <typename V>
void WalkChildren(V &v);
protected:
explicit GoASTNode(NodeKind kind) : m_kind(kind) { }
private:
const NodeKind m_kind;
GoASTNode(const GoASTNode&) = delete;
const GoASTNode& operator=(const GoASTNode&) = delete;
};
class GoASTDecl : public GoASTNode
{
public:
template <typename R, typename V>
R Visit(V* v) const;
static bool
classof(const GoASTNode* n) { return n->GetKind() >= eBadDecl && n->GetKind() <= eGenDecl; }
protected:
explicit GoASTDecl(NodeKind kind) : GoASTNode(kind) { }
private:
GoASTDecl(const GoASTDecl&) = delete;
const GoASTDecl& operator=(const GoASTDecl&) = delete;
};
class GoASTExpr : public GoASTNode
{
public:
template <typename R, typename V>
R Visit(V* v) const;
static bool
classof(const GoASTNode* n) { return n->GetKind() >= eArrayType && n->GetKind() <= eUnaryExpr; }
protected:
explicit GoASTExpr(NodeKind kind) : GoASTNode(kind) { }
private:
GoASTExpr(const GoASTExpr&) = delete;
const GoASTExpr& operator=(const GoASTExpr&) = delete;
};
class GoASTSpec : public GoASTNode
{
public:
template <typename R, typename V>
R Visit(V* v) const;
static bool
classof(const GoASTNode* n) { return n->GetKind() >= eImportSpec && n->GetKind() <= eValueSpec; }
protected:
explicit GoASTSpec(NodeKind kind) : GoASTNode(kind) { }
private:
GoASTSpec(const GoASTSpec&) = delete;
const GoASTSpec& operator=(const GoASTSpec&) = delete;
};
class GoASTStmt : public GoASTNode
{
public:
template <typename R, typename V>
R Visit(V* v) const;
static bool
classof(const GoASTNode* n) { return n->GetKind() >= eAssignStmt && n->GetKind() <= eTypeSwitchStmt; }
protected:
explicit GoASTStmt(NodeKind kind) : GoASTNode(kind) { }
private:
GoASTStmt(const GoASTStmt&) = delete;
const GoASTStmt& operator=(const GoASTStmt&) = delete;
};
class GoASTArrayType : public GoASTExpr
{
public:
GoASTArrayType(GoASTExpr* len, GoASTExpr* elt) : GoASTExpr(eArrayType), m_len(len), m_elt(elt) {}
virtual ~GoASTArrayType() { }
brucemUnsubmitted
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I think a lot of these destructors could be ~GoASTArrayType override = default; ? (for this and other classes here)

brucem: I think a lot of these destructors could be `~GoASTArrayType override = default;` ? (for this…
const char* GetKindName() const { return "ArrayType"; }
brucemUnsubmitted
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This should have override on it.

brucem: This should have `override` on it.
static bool
classof(const GoASTNode* n) { return n->GetKind() == eArrayType; }
const GoASTExpr* GetLen() const { return m_len.get(); }
void SetLen(GoASTExpr* len) { m_len.reset(len); }
const GoASTExpr* GetElt() const { return m_elt.get(); }
void SetElt(GoASTExpr* elt) { m_elt.reset(elt); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_len;
std::unique_ptr<GoASTExpr> m_elt;
GoASTArrayType(const GoASTArrayType&) = delete;
const GoASTArrayType& operator=(const GoASTArrayType&) = delete;
};
class GoASTAssignStmt : public GoASTStmt
{
public:
explicit GoASTAssignStmt(bool define) : GoASTStmt(eAssignStmt), m_define(define) {}
virtual ~GoASTAssignStmt() { }
const char* GetKindName() const { return "AssignStmt"; }
brucemUnsubmitted
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This should have override as well.

brucem: This should have `override` as well.
jinghamUnsubmitted
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Same comment about formatting...

jingham: Same comment about formatting...
static bool
classof(const GoASTNode* n) { return n->GetKind() == eAssignStmt; }
size_t NumLhs() const { return m_lhs.size(); }
const GoASTExpr* GetLhs(int i) const { return m_lhs[i].get(); }
void AddLhs(GoASTExpr* lhs) { m_lhs.push_back(std::unique_ptr<GoASTExpr>(lhs)); }
size_t NumRhs() const { return m_rhs.size(); }
const GoASTExpr* GetRhs(int i) const { return m_rhs[i].get(); }
void AddRhs(GoASTExpr* rhs) { m_rhs.push_back(std::unique_ptr<GoASTExpr>(rhs)); }
bool GetDefine() const { return m_define; }
void SetDefine(bool define) { m_define = define; }
private:
friend class GoASTNode;
std::vector<std::unique_ptr<GoASTExpr> > m_lhs;
std::vector<std::unique_ptr<GoASTExpr> > m_rhs;
bool m_define;
GoASTAssignStmt(const GoASTAssignStmt&) = delete;
const GoASTAssignStmt& operator=(const GoASTAssignStmt&) = delete;
};
class GoASTBadDecl : public GoASTDecl
{
public:
GoASTBadDecl() : GoASTDecl(eBadDecl) {}
virtual ~GoASTBadDecl() { }
const char* GetKindName() const { return "BadDecl"; }
brucemUnsubmitted
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override here too and the rest of the GetKindName overrides.

brucem: `override` here too and the rest of the `GetKindName` overrides.
static bool
classof(const GoASTNode* n) { return n->GetKind() == eBadDecl; }
GoASTBadDecl(const GoASTBadDecl&) = delete;
const GoASTBadDecl& operator=(const GoASTBadDecl&) = delete;
};
class GoASTBadExpr : public GoASTExpr
{
public:
jinghamUnsubmitted
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We usually postpend with _sp or _up variables that are shared or unique pointers. They have sufficiently interesting lifecycle that it is helpful to know at a glance what kind of thing they are.

jingham: We usually postpend with _sp or _up variables that are shared or unique pointers. They have…
GoASTBadExpr() : GoASTExpr(eBadExpr) {}
virtual ~GoASTBadExpr() { }
const char* GetKindName() const { return "BadExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eBadExpr; }
GoASTBadExpr(const GoASTBadExpr&) = delete;
const GoASTBadExpr& operator=(const GoASTBadExpr&) = delete;
};
jinghamUnsubmitted
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Here too...

jingham: Here too...
class GoASTBadStmt : public GoASTStmt
{
public:
GoASTBadStmt() : GoASTStmt(eBadStmt) {}
virtual ~GoASTBadStmt() { }
const char* GetKindName() const { return "BadStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eBadStmt; }
GoASTBadStmt(const GoASTBadStmt&) = delete;
const GoASTBadStmt& operator=(const GoASTBadStmt&) = delete;
};
class GoASTBasicLit : public GoASTExpr
{
public:
explicit GoASTBasicLit(Token value) : GoASTExpr(eBasicLit), m_value(value) {}
virtual ~GoASTBasicLit() { }
const char* GetKindName() const { return "BasicLit"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eBasicLit; }
Token GetValue() const { return m_value; }
void SetValue(Token value) { m_value = value; }
private:
friend class GoASTNode;
Token m_value;
GoASTBasicLit(const GoASTBasicLit&) = delete;
const GoASTBasicLit& operator=(const GoASTBasicLit&) = delete;
};
class GoASTBinaryExpr : public GoASTExpr
{
public:
GoASTBinaryExpr(GoASTExpr* x, GoASTExpr* y, TokenType op) : GoASTExpr(eBinaryExpr), m_x(x), m_y(y), m_op(op) {}
virtual ~GoASTBinaryExpr() { }
const char* GetKindName() const { return "BinaryExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eBinaryExpr; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
const GoASTExpr* GetY() const { return m_y.get(); }
void SetY(GoASTExpr* y) { m_y.reset(y); }
TokenType GetOp() const { return m_op; }
void SetOp(TokenType op) { m_op = op; }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
std::unique_ptr<GoASTExpr> m_y;
TokenType m_op;
jinghamUnsubmitted
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Maybe m_lhs_up, etc.

jingham: Maybe m_lhs_up, etc.
GoASTBinaryExpr(const GoASTBinaryExpr&) = delete;
const GoASTBinaryExpr& operator=(const GoASTBinaryExpr&) = delete;
};
class GoASTBlockStmt : public GoASTStmt
{
public:
GoASTBlockStmt() : GoASTStmt(eBlockStmt) {}
virtual ~GoASTBlockStmt() { }
const char* GetKindName() const { return "BlockStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eBlockStmt; }
size_t NumList() const { return m_list.size(); }
const GoASTStmt* GetList(int i) const { return m_list[i].get(); }
void AddList(GoASTStmt* list) { m_list.push_back(std::unique_ptr<GoASTStmt>(list)); }
private:
friend class GoASTNode;
std::vector<std::unique_ptr<GoASTStmt> > m_list;
GoASTBlockStmt(const GoASTBlockStmt&) = delete;
const GoASTBlockStmt& operator=(const GoASTBlockStmt&) = delete;
};
class GoASTIdent : public GoASTExpr
{
public:
explicit GoASTIdent(Token name) : GoASTExpr(eIdent), m_name(name) {}
virtual ~GoASTIdent() { }
const char* GetKindName() const { return "Ident"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eIdent; }
Token GetName() const { return m_name; }
void SetName(Token name) { m_name = name; }
private:
friend class GoASTNode;
Token m_name;
GoASTIdent(const GoASTIdent&) = delete;
const GoASTIdent& operator=(const GoASTIdent&) = delete;
};
class GoASTBranchStmt : public GoASTStmt
{
public:
GoASTBranchStmt(GoASTIdent* label, TokenType tok) : GoASTStmt(eBranchStmt), m_label(label), m_tok(tok) {}
virtual ~GoASTBranchStmt() { }
const char* GetKindName() const { return "BranchStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eBranchStmt; }
const GoASTIdent* GetLabel() const { return m_label.get(); }
void SetLabel(GoASTIdent* label) { m_label.reset(label); }
TokenType GetTok() const { return m_tok; }
void SetTok(TokenType tok) { m_tok = tok; }
private:
friend class GoASTNode;
std::unique_ptr<GoASTIdent> m_label;
TokenType m_tok;
GoASTBranchStmt(const GoASTBranchStmt&) = delete;
const GoASTBranchStmt& operator=(const GoASTBranchStmt&) = delete;
};
class GoASTCallExpr : public GoASTExpr
{
public:
explicit GoASTCallExpr(bool ellipsis) : GoASTExpr(eCallExpr), m_ellipsis(ellipsis) {}
virtual ~GoASTCallExpr() { }
const char* GetKindName() const { return "CallExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eCallExpr; }
const GoASTExpr* GetFun() const { return m_fun.get(); }
void SetFun(GoASTExpr* fun) { m_fun.reset(fun); }
size_t NumArgs() const { return m_args.size(); }
const GoASTExpr* GetArgs(int i) const { return m_args[i].get(); }
void AddArgs(GoASTExpr* args) { m_args.push_back(std::unique_ptr<GoASTExpr>(args)); }
bool GetEllipsis() const { return m_ellipsis; }
void SetEllipsis(bool ellipsis) { m_ellipsis = ellipsis; }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_fun;
std::vector<std::unique_ptr<GoASTExpr> > m_args;
bool m_ellipsis;
GoASTCallExpr(const GoASTCallExpr&) = delete;
const GoASTCallExpr& operator=(const GoASTCallExpr&) = delete;
};
class GoASTCaseClause : public GoASTStmt
{
public:
GoASTCaseClause() : GoASTStmt(eCaseClause) {}
virtual ~GoASTCaseClause() { }
const char* GetKindName() const { return "CaseClause"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eCaseClause; }
size_t NumList() const { return m_list.size(); }
const GoASTExpr* GetList(int i) const { return m_list[i].get(); }
void AddList(GoASTExpr* list) { m_list.push_back(std::unique_ptr<GoASTExpr>(list)); }
size_t NumBody() const { return m_body.size(); }
const GoASTStmt* GetBody(int i) const { return m_body[i].get(); }
void AddBody(GoASTStmt* body) { m_body.push_back(std::unique_ptr<GoASTStmt>(body)); }
private:
friend class GoASTNode;
std::vector<std::unique_ptr<GoASTExpr> > m_list;
std::vector<std::unique_ptr<GoASTStmt> > m_body;
GoASTCaseClause(const GoASTCaseClause&) = delete;
const GoASTCaseClause& operator=(const GoASTCaseClause&) = delete;
};
class GoASTChanType : public GoASTExpr
{
public:
GoASTChanType(ChanDir dir, GoASTExpr* value) : GoASTExpr(eChanType), m_dir(dir), m_value(value) {}
virtual ~GoASTChanType() { }
const char* GetKindName() const { return "ChanType"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eChanType; }
ChanDir GetDir() const { return m_dir; }
void SetDir(ChanDir dir) { m_dir = dir; }
const GoASTExpr* GetValue() const { return m_value.get(); }
void SetValue(GoASTExpr* value) { m_value.reset(value); }
private:
friend class GoASTNode;
ChanDir m_dir;
std::unique_ptr<GoASTExpr> m_value;
GoASTChanType(const GoASTChanType&) = delete;
const GoASTChanType& operator=(const GoASTChanType&) = delete;
};
class GoASTCommClause : public GoASTStmt
{
public:
GoASTCommClause() : GoASTStmt(eCommClause) {}
virtual ~GoASTCommClause() { }
const char* GetKindName() const { return "CommClause"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eCommClause; }
const GoASTStmt* GetComm() const { return m_comm.get(); }
void SetComm(GoASTStmt* comm) { m_comm.reset(comm); }
size_t NumBody() const { return m_body.size(); }
const GoASTStmt* GetBody(int i) const { return m_body[i].get(); }
void AddBody(GoASTStmt* body) { m_body.push_back(std::unique_ptr<GoASTStmt>(body)); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTStmt> m_comm;
std::vector<std::unique_ptr<GoASTStmt> > m_body;
GoASTCommClause(const GoASTCommClause&) = delete;
const GoASTCommClause& operator=(const GoASTCommClause&) = delete;
};
class GoASTCompositeLit : public GoASTExpr
{
public:
GoASTCompositeLit() : GoASTExpr(eCompositeLit) {}
virtual ~GoASTCompositeLit() { }
const char* GetKindName() const { return "CompositeLit"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eCompositeLit; }
const GoASTExpr* GetType() const { return m_type.get(); }
void SetType(GoASTExpr* type) { m_type.reset(type); }
size_t NumElts() const { return m_elts.size(); }
const GoASTExpr* GetElts(int i) const { return m_elts[i].get(); }
void AddElts(GoASTExpr* elts) { m_elts.push_back(std::unique_ptr<GoASTExpr>(elts)); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_type;
std::vector<std::unique_ptr<GoASTExpr> > m_elts;
GoASTCompositeLit(const GoASTCompositeLit&) = delete;
const GoASTCompositeLit& operator=(const GoASTCompositeLit&) = delete;
};
class GoASTDeclStmt : public GoASTStmt
{
public:
explicit GoASTDeclStmt(GoASTDecl* decl) : GoASTStmt(eDeclStmt), m_decl(decl) {}
virtual ~GoASTDeclStmt() { }
const char* GetKindName() const { return "DeclStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eDeclStmt; }
const GoASTDecl* GetDecl() const { return m_decl.get(); }
void SetDecl(GoASTDecl* decl) { m_decl.reset(decl); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTDecl> m_decl;
GoASTDeclStmt(const GoASTDeclStmt&) = delete;
const GoASTDeclStmt& operator=(const GoASTDeclStmt&) = delete;
};
class GoASTDeferStmt : public GoASTStmt
{
public:
explicit GoASTDeferStmt(GoASTCallExpr* call) : GoASTStmt(eDeferStmt), m_call(call) {}
virtual ~GoASTDeferStmt() { }
const char* GetKindName() const { return "DeferStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eDeferStmt; }
const GoASTCallExpr* GetCall() const { return m_call.get(); }
void SetCall(GoASTCallExpr* call) { m_call.reset(call); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTCallExpr> m_call;
GoASTDeferStmt(const GoASTDeferStmt&) = delete;
const GoASTDeferStmt& operator=(const GoASTDeferStmt&) = delete;
};
class GoASTEllipsis : public GoASTExpr
{
public:
explicit GoASTEllipsis(GoASTExpr* elt) : GoASTExpr(eEllipsis), m_elt(elt) {}
virtual ~GoASTEllipsis() { }
const char* GetKindName() const { return "Ellipsis"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eEllipsis; }
const GoASTExpr* GetElt() const { return m_elt.get(); }
void SetElt(GoASTExpr* elt) { m_elt.reset(elt); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_elt;
GoASTEllipsis(const GoASTEllipsis&) = delete;
const GoASTEllipsis& operator=(const GoASTEllipsis&) = delete;
};
class GoASTEmptyStmt : public GoASTStmt
{
public:
GoASTEmptyStmt() : GoASTStmt(eEmptyStmt) {}
virtual ~GoASTEmptyStmt() { }
const char* GetKindName() const { return "EmptyStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eEmptyStmt; }
GoASTEmptyStmt(const GoASTEmptyStmt&) = delete;
const GoASTEmptyStmt& operator=(const GoASTEmptyStmt&) = delete;
};
class GoASTExprStmt : public GoASTStmt
{
public:
explicit GoASTExprStmt(GoASTExpr* x) : GoASTStmt(eExprStmt), m_x(x) {}
virtual ~GoASTExprStmt() { }
const char* GetKindName() const { return "ExprStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eExprStmt; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
GoASTExprStmt(const GoASTExprStmt&) = delete;
const GoASTExprStmt& operator=(const GoASTExprStmt&) = delete;
};
class GoASTField : public GoASTNode
{
public:
GoASTField() : GoASTNode(eField) {}
virtual ~GoASTField() { }
const char* GetKindName() const { return "Field"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eField; }
size_t NumNames() const { return m_names.size(); }
const GoASTIdent* GetNames(int i) const { return m_names[i].get(); }
void AddNames(GoASTIdent* names) { m_names.push_back(std::unique_ptr<GoASTIdent>(names)); }
const GoASTExpr* GetType() const { return m_type.get(); }
void SetType(GoASTExpr* type) { m_type.reset(type); }
const GoASTBasicLit* GetTag() const { return m_tag.get(); }
void SetTag(GoASTBasicLit* tag) { m_tag.reset(tag); }
private:
friend class GoASTNode;
std::vector<std::unique_ptr<GoASTIdent> > m_names;
std::unique_ptr<GoASTExpr> m_type;
std::unique_ptr<GoASTBasicLit> m_tag;
GoASTField(const GoASTField&) = delete;
const GoASTField& operator=(const GoASTField&) = delete;
};
class GoASTFieldList : public GoASTNode
{
public:
GoASTFieldList() : GoASTNode(eFieldList) {}
virtual ~GoASTFieldList() { }
const char* GetKindName() const { return "FieldList"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eFieldList; }
size_t NumList() const { return m_list.size(); }
const GoASTField* GetList(int i) const { return m_list[i].get(); }
void AddList(GoASTField* list) { m_list.push_back(std::unique_ptr<GoASTField>(list)); }
private:
friend class GoASTNode;
std::vector<std::unique_ptr<GoASTField> > m_list;
GoASTFieldList(const GoASTFieldList&) = delete;
const GoASTFieldList& operator=(const GoASTFieldList&) = delete;
};
class GoASTForStmt : public GoASTStmt
{
public:
GoASTForStmt(GoASTStmt* init, GoASTExpr* cond, GoASTStmt* post, GoASTBlockStmt* body) : GoASTStmt(eForStmt), m_init(init), m_cond(cond), m_post(post), m_body(body) {}
virtual ~GoASTForStmt() { }
const char* GetKindName() const { return "ForStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eForStmt; }
const GoASTStmt* GetInit() const { return m_init.get(); }
void SetInit(GoASTStmt* init) { m_init.reset(init); }
const GoASTExpr* GetCond() const { return m_cond.get(); }
void SetCond(GoASTExpr* cond) { m_cond.reset(cond); }
const GoASTStmt* GetPost() const { return m_post.get(); }
void SetPost(GoASTStmt* post) { m_post.reset(post); }
const GoASTBlockStmt* GetBody() const { return m_body.get(); }
void SetBody(GoASTBlockStmt* body) { m_body.reset(body); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTStmt> m_init;
std::unique_ptr<GoASTExpr> m_cond;
std::unique_ptr<GoASTStmt> m_post;
std::unique_ptr<GoASTBlockStmt> m_body;
GoASTForStmt(const GoASTForStmt&) = delete;
const GoASTForStmt& operator=(const GoASTForStmt&) = delete;
};
class GoASTFuncType : public GoASTExpr
{
public:
GoASTFuncType(GoASTFieldList* params, GoASTFieldList* results) : GoASTExpr(eFuncType), m_params(params), m_results(results) {}
virtual ~GoASTFuncType() { }
const char* GetKindName() const { return "FuncType"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eFuncType; }
const GoASTFieldList* GetParams() const { return m_params.get(); }
void SetParams(GoASTFieldList* params) { m_params.reset(params); }
const GoASTFieldList* GetResults() const { return m_results.get(); }
void SetResults(GoASTFieldList* results) { m_results.reset(results); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTFieldList> m_params;
std::unique_ptr<GoASTFieldList> m_results;
GoASTFuncType(const GoASTFuncType&) = delete;
const GoASTFuncType& operator=(const GoASTFuncType&) = delete;
};
class GoASTFuncDecl : public GoASTDecl
{
public:
GoASTFuncDecl(GoASTFieldList* recv, GoASTIdent* name, GoASTFuncType* type, GoASTBlockStmt* body) : GoASTDecl(eFuncDecl), m_recv(recv), m_name(name), m_type(type), m_body(body) {}
virtual ~GoASTFuncDecl() { }
const char* GetKindName() const { return "FuncDecl"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eFuncDecl; }
const GoASTFieldList* GetRecv() const { return m_recv.get(); }
void SetRecv(GoASTFieldList* recv) { m_recv.reset(recv); }
const GoASTIdent* GetName() const { return m_name.get(); }
void SetName(GoASTIdent* name) { m_name.reset(name); }
const GoASTFuncType* GetType() const { return m_type.get(); }
void SetType(GoASTFuncType* type) { m_type.reset(type); }
const GoASTBlockStmt* GetBody() const { return m_body.get(); }
void SetBody(GoASTBlockStmt* body) { m_body.reset(body); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTFieldList> m_recv;
std::unique_ptr<GoASTIdent> m_name;
std::unique_ptr<GoASTFuncType> m_type;
std::unique_ptr<GoASTBlockStmt> m_body;
GoASTFuncDecl(const GoASTFuncDecl&) = delete;
const GoASTFuncDecl& operator=(const GoASTFuncDecl&) = delete;
};
class GoASTFuncLit : public GoASTExpr
{
public:
GoASTFuncLit(GoASTFuncType* type, GoASTBlockStmt* body) : GoASTExpr(eFuncLit), m_type(type), m_body(body) {}
virtual ~GoASTFuncLit() { }
const char* GetKindName() const { return "FuncLit"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eFuncLit; }
const GoASTFuncType* GetType() const { return m_type.get(); }
void SetType(GoASTFuncType* type) { m_type.reset(type); }
const GoASTBlockStmt* GetBody() const { return m_body.get(); }
void SetBody(GoASTBlockStmt* body) { m_body.reset(body); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTFuncType> m_type;
std::unique_ptr<GoASTBlockStmt> m_body;
GoASTFuncLit(const GoASTFuncLit&) = delete;
const GoASTFuncLit& operator=(const GoASTFuncLit&) = delete;
};
class GoASTGenDecl : public GoASTDecl
{
public:
explicit GoASTGenDecl(TokenType tok) : GoASTDecl(eGenDecl), m_tok(tok) {}
virtual ~GoASTGenDecl() { }
const char* GetKindName() const { return "GenDecl"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eGenDecl; }
TokenType GetTok() const { return m_tok; }
void SetTok(TokenType tok) { m_tok = tok; }
size_t NumSpecs() const { return m_specs.size(); }
const GoASTSpec* GetSpecs(int i) const { return m_specs[i].get(); }
void AddSpecs(GoASTSpec* specs) { m_specs.push_back(std::unique_ptr<GoASTSpec>(specs)); }
private:
friend class GoASTNode;
TokenType m_tok;
std::vector<std::unique_ptr<GoASTSpec> > m_specs;
GoASTGenDecl(const GoASTGenDecl&) = delete;
const GoASTGenDecl& operator=(const GoASTGenDecl&) = delete;
};
class GoASTGoStmt : public GoASTStmt
{
public:
explicit GoASTGoStmt(GoASTCallExpr* call) : GoASTStmt(eGoStmt), m_call(call) {}
virtual ~GoASTGoStmt() { }
const char* GetKindName() const { return "GoStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eGoStmt; }
const GoASTCallExpr* GetCall() const { return m_call.get(); }
void SetCall(GoASTCallExpr* call) { m_call.reset(call); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTCallExpr> m_call;
GoASTGoStmt(const GoASTGoStmt&) = delete;
const GoASTGoStmt& operator=(const GoASTGoStmt&) = delete;
};
class GoASTIfStmt : public GoASTStmt
{
public:
GoASTIfStmt(GoASTStmt* init, GoASTExpr* cond, GoASTBlockStmt* body, GoASTStmt* els) : GoASTStmt(eIfStmt), m_init(init), m_cond(cond), m_body(body), m_els(els) {}
virtual ~GoASTIfStmt() { }
const char* GetKindName() const { return "IfStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eIfStmt; }
const GoASTStmt* GetInit() const { return m_init.get(); }
void SetInit(GoASTStmt* init) { m_init.reset(init); }
const GoASTExpr* GetCond() const { return m_cond.get(); }
void SetCond(GoASTExpr* cond) { m_cond.reset(cond); }
const GoASTBlockStmt* GetBody() const { return m_body.get(); }
void SetBody(GoASTBlockStmt* body) { m_body.reset(body); }
const GoASTStmt* GetEls() const { return m_els.get(); }
void SetEls(GoASTStmt* els) { m_els.reset(els); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTStmt> m_init;
std::unique_ptr<GoASTExpr> m_cond;
std::unique_ptr<GoASTBlockStmt> m_body;
std::unique_ptr<GoASTStmt> m_els;
GoASTIfStmt(const GoASTIfStmt&) = delete;
const GoASTIfStmt& operator=(const GoASTIfStmt&) = delete;
};
class GoASTImportSpec : public GoASTSpec
{
public:
GoASTImportSpec(GoASTIdent* name, GoASTBasicLit* path) : GoASTSpec(eImportSpec), m_name(name), m_path(path) {}
virtual ~GoASTImportSpec() { }
const char* GetKindName() const { return "ImportSpec"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eImportSpec; }
const GoASTIdent* GetName() const { return m_name.get(); }
void SetName(GoASTIdent* name) { m_name.reset(name); }
const GoASTBasicLit* GetPath() const { return m_path.get(); }
void SetPath(GoASTBasicLit* path) { m_path.reset(path); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTIdent> m_name;
std::unique_ptr<GoASTBasicLit> m_path;
GoASTImportSpec(const GoASTImportSpec&) = delete;
const GoASTImportSpec& operator=(const GoASTImportSpec&) = delete;
};
class GoASTIncDecStmt : public GoASTStmt
{
public:
GoASTIncDecStmt(GoASTExpr* x, TokenType tok) : GoASTStmt(eIncDecStmt), m_x(x), m_tok(tok) {}
virtual ~GoASTIncDecStmt() { }
const char* GetKindName() const { return "IncDecStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eIncDecStmt; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
TokenType GetTok() const { return m_tok; }
void SetTok(TokenType tok) { m_tok = tok; }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
TokenType m_tok;
GoASTIncDecStmt(const GoASTIncDecStmt&) = delete;
const GoASTIncDecStmt& operator=(const GoASTIncDecStmt&) = delete;
};
class GoASTIndexExpr : public GoASTExpr
{
public:
GoASTIndexExpr(GoASTExpr* x, GoASTExpr* index) : GoASTExpr(eIndexExpr), m_x(x), m_index(index) {}
virtual ~GoASTIndexExpr() { }
const char* GetKindName() const { return "IndexExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eIndexExpr; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
const GoASTExpr* GetIndex() const { return m_index.get(); }
void SetIndex(GoASTExpr* index) { m_index.reset(index); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
std::unique_ptr<GoASTExpr> m_index;
GoASTIndexExpr(const GoASTIndexExpr&) = delete;
const GoASTIndexExpr& operator=(const GoASTIndexExpr&) = delete;
};
class GoASTInterfaceType : public GoASTExpr
{
public:
explicit GoASTInterfaceType(GoASTFieldList* methods) : GoASTExpr(eInterfaceType), m_methods(methods) {}
virtual ~GoASTInterfaceType() { }
const char* GetKindName() const { return "InterfaceType"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eInterfaceType; }
const GoASTFieldList* GetMethods() const { return m_methods.get(); }
void SetMethods(GoASTFieldList* methods) { m_methods.reset(methods); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTFieldList> m_methods;
GoASTInterfaceType(const GoASTInterfaceType&) = delete;
const GoASTInterfaceType& operator=(const GoASTInterfaceType&) = delete;
};
class GoASTKeyValueExpr : public GoASTExpr
{
public:
GoASTKeyValueExpr(GoASTExpr* key, GoASTExpr* value) : GoASTExpr(eKeyValueExpr), m_key(key), m_value(value) {}
virtual ~GoASTKeyValueExpr() { }
const char* GetKindName() const { return "KeyValueExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eKeyValueExpr; }
const GoASTExpr* GetKey() const { return m_key.get(); }
void SetKey(GoASTExpr* key) { m_key.reset(key); }
const GoASTExpr* GetValue() const { return m_value.get(); }
void SetValue(GoASTExpr* value) { m_value.reset(value); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_key;
std::unique_ptr<GoASTExpr> m_value;
GoASTKeyValueExpr(const GoASTKeyValueExpr&) = delete;
const GoASTKeyValueExpr& operator=(const GoASTKeyValueExpr&) = delete;
};
class GoASTLabeledStmt : public GoASTStmt
{
public:
GoASTLabeledStmt(GoASTIdent* label, GoASTStmt* stmt) : GoASTStmt(eLabeledStmt), m_label(label), m_stmt(stmt) {}
virtual ~GoASTLabeledStmt() { }
const char* GetKindName() const { return "LabeledStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eLabeledStmt; }
const GoASTIdent* GetLabel() const { return m_label.get(); }
void SetLabel(GoASTIdent* label) { m_label.reset(label); }
const GoASTStmt* GetStmt() const { return m_stmt.get(); }
void SetStmt(GoASTStmt* stmt) { m_stmt.reset(stmt); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTIdent> m_label;
std::unique_ptr<GoASTStmt> m_stmt;
GoASTLabeledStmt(const GoASTLabeledStmt&) = delete;
const GoASTLabeledStmt& operator=(const GoASTLabeledStmt&) = delete;
};
class GoASTMapType : public GoASTExpr
{
public:
GoASTMapType(GoASTExpr* key, GoASTExpr* value) : GoASTExpr(eMapType), m_key(key), m_value(value) {}
virtual ~GoASTMapType() { }
const char* GetKindName() const { return "MapType"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eMapType; }
const GoASTExpr* GetKey() const { return m_key.get(); }
void SetKey(GoASTExpr* key) { m_key.reset(key); }
const GoASTExpr* GetValue() const { return m_value.get(); }
void SetValue(GoASTExpr* value) { m_value.reset(value); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_key;
std::unique_ptr<GoASTExpr> m_value;
GoASTMapType(const GoASTMapType&) = delete;
const GoASTMapType& operator=(const GoASTMapType&) = delete;
};
class GoASTParenExpr : public GoASTExpr
{
public:
explicit GoASTParenExpr(GoASTExpr* x) : GoASTExpr(eParenExpr), m_x(x) {}
virtual ~GoASTParenExpr() { }
const char* GetKindName() const { return "ParenExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eParenExpr; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
GoASTParenExpr(const GoASTParenExpr&) = delete;
const GoASTParenExpr& operator=(const GoASTParenExpr&) = delete;
};
class GoASTRangeStmt : public GoASTStmt
{
public:
GoASTRangeStmt(GoASTExpr* key, GoASTExpr* value, bool define, GoASTExpr* x, GoASTBlockStmt* body) : GoASTStmt(eRangeStmt), m_key(key), m_value(value), m_define(define), m_x(x), m_body(body) {}
virtual ~GoASTRangeStmt() { }
const char* GetKindName() const { return "RangeStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eRangeStmt; }
const GoASTExpr* GetKey() const { return m_key.get(); }
void SetKey(GoASTExpr* key) { m_key.reset(key); }
const GoASTExpr* GetValue() const { return m_value.get(); }
void SetValue(GoASTExpr* value) { m_value.reset(value); }
bool GetDefine() const { return m_define; }
void SetDefine(bool define) { m_define = define; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
const GoASTBlockStmt* GetBody() const { return m_body.get(); }
void SetBody(GoASTBlockStmt* body) { m_body.reset(body); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_key;
std::unique_ptr<GoASTExpr> m_value;
bool m_define;
std::unique_ptr<GoASTExpr> m_x;
std::unique_ptr<GoASTBlockStmt> m_body;
GoASTRangeStmt(const GoASTRangeStmt&) = delete;
const GoASTRangeStmt& operator=(const GoASTRangeStmt&) = delete;
};
class GoASTReturnStmt : public GoASTStmt
{
public:
GoASTReturnStmt() : GoASTStmt(eReturnStmt) {}
virtual ~GoASTReturnStmt() { }
const char* GetKindName() const { return "ReturnStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eReturnStmt; }
size_t NumResults() const { return m_results.size(); }
const GoASTExpr* GetResults(int i) const { return m_results[i].get(); }
void AddResults(GoASTExpr* results) { m_results.push_back(std::unique_ptr<GoASTExpr>(results)); }
private:
friend class GoASTNode;
std::vector<std::unique_ptr<GoASTExpr> > m_results;
GoASTReturnStmt(const GoASTReturnStmt&) = delete;
const GoASTReturnStmt& operator=(const GoASTReturnStmt&) = delete;
};
class GoASTSelectStmt : public GoASTStmt
{
public:
explicit GoASTSelectStmt(GoASTBlockStmt* body) : GoASTStmt(eSelectStmt), m_body(body) {}
virtual ~GoASTSelectStmt() { }
const char* GetKindName() const { return "SelectStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eSelectStmt; }
const GoASTBlockStmt* GetBody() const { return m_body.get(); }
void SetBody(GoASTBlockStmt* body) { m_body.reset(body); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTBlockStmt> m_body;
GoASTSelectStmt(const GoASTSelectStmt&) = delete;
const GoASTSelectStmt& operator=(const GoASTSelectStmt&) = delete;
};
class GoASTSelectorExpr : public GoASTExpr
{
public:
GoASTSelectorExpr(GoASTExpr* x, GoASTIdent* sel) : GoASTExpr(eSelectorExpr), m_x(x), m_sel(sel) {}
virtual ~GoASTSelectorExpr() { }
const char* GetKindName() const { return "SelectorExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eSelectorExpr; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
const GoASTIdent* GetSel() const { return m_sel.get(); }
void SetSel(GoASTIdent* sel) { m_sel.reset(sel); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
std::unique_ptr<GoASTIdent> m_sel;
GoASTSelectorExpr(const GoASTSelectorExpr&) = delete;
const GoASTSelectorExpr& operator=(const GoASTSelectorExpr&) = delete;
};
class GoASTSendStmt : public GoASTStmt
{
public:
GoASTSendStmt(GoASTExpr* chan, GoASTExpr* value) : GoASTStmt(eSendStmt), m_chan(chan), m_value(value) {}
virtual ~GoASTSendStmt() { }
const char* GetKindName() const { return "SendStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eSendStmt; }
const GoASTExpr* GetChan() const { return m_chan.get(); }
void SetChan(GoASTExpr* chan) { m_chan.reset(chan); }
const GoASTExpr* GetValue() const { return m_value.get(); }
void SetValue(GoASTExpr* value) { m_value.reset(value); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_chan;
std::unique_ptr<GoASTExpr> m_value;
GoASTSendStmt(const GoASTSendStmt&) = delete;
const GoASTSendStmt& operator=(const GoASTSendStmt&) = delete;
};
class GoASTSliceExpr : public GoASTExpr
{
public:
GoASTSliceExpr(GoASTExpr* x, GoASTExpr* low, GoASTExpr* high, GoASTExpr* max, bool slice3) : GoASTExpr(eSliceExpr), m_x(x), m_low(low), m_high(high), m_max(max), m_slice3(slice3) {}
virtual ~GoASTSliceExpr() { }
const char* GetKindName() const { return "SliceExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eSliceExpr; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
const GoASTExpr* GetLow() const { return m_low.get(); }
void SetLow(GoASTExpr* low) { m_low.reset(low); }
const GoASTExpr* GetHigh() const { return m_high.get(); }
void SetHigh(GoASTExpr* high) { m_high.reset(high); }
const GoASTExpr* GetMax() const { return m_max.get(); }
void SetMax(GoASTExpr* max) { m_max.reset(max); }
bool GetSlice3() const { return m_slice3; }
void SetSlice3(bool slice3) { m_slice3 = slice3; }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
std::unique_ptr<GoASTExpr> m_low;
std::unique_ptr<GoASTExpr> m_high;
std::unique_ptr<GoASTExpr> m_max;
bool m_slice3;
GoASTSliceExpr(const GoASTSliceExpr&) = delete;
const GoASTSliceExpr& operator=(const GoASTSliceExpr&) = delete;
};
class GoASTStarExpr : public GoASTExpr
{
public:
explicit GoASTStarExpr(GoASTExpr* x) : GoASTExpr(eStarExpr), m_x(x) {}
virtual ~GoASTStarExpr() { }
const char* GetKindName() const { return "StarExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eStarExpr; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
GoASTStarExpr(const GoASTStarExpr&) = delete;
const GoASTStarExpr& operator=(const GoASTStarExpr&) = delete;
};
class GoASTStructType : public GoASTExpr
{
public:
explicit GoASTStructType(GoASTFieldList* fields) : GoASTExpr(eStructType), m_fields(fields) {}
virtual ~GoASTStructType() { }
const char* GetKindName() const { return "StructType"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eStructType; }
const GoASTFieldList* GetFields() const { return m_fields.get(); }
void SetFields(GoASTFieldList* fields) { m_fields.reset(fields); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTFieldList> m_fields;
GoASTStructType(const GoASTStructType&) = delete;
const GoASTStructType& operator=(const GoASTStructType&) = delete;
};
class GoASTSwitchStmt : public GoASTStmt
{
public:
GoASTSwitchStmt(GoASTStmt* init, GoASTExpr* tag, GoASTBlockStmt* body) : GoASTStmt(eSwitchStmt), m_init(init), m_tag(tag), m_body(body) {}
virtual ~GoASTSwitchStmt() { }
const char* GetKindName() const { return "SwitchStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eSwitchStmt; }
const GoASTStmt* GetInit() const { return m_init.get(); }
void SetInit(GoASTStmt* init) { m_init.reset(init); }
const GoASTExpr* GetTag() const { return m_tag.get(); }
void SetTag(GoASTExpr* tag) { m_tag.reset(tag); }
const GoASTBlockStmt* GetBody() const { return m_body.get(); }
void SetBody(GoASTBlockStmt* body) { m_body.reset(body); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTStmt> m_init;
std::unique_ptr<GoASTExpr> m_tag;
std::unique_ptr<GoASTBlockStmt> m_body;
GoASTSwitchStmt(const GoASTSwitchStmt&) = delete;
const GoASTSwitchStmt& operator=(const GoASTSwitchStmt&) = delete;
};
class GoASTTypeAssertExpr : public GoASTExpr
{
public:
GoASTTypeAssertExpr(GoASTExpr* x, GoASTExpr* type) : GoASTExpr(eTypeAssertExpr), m_x(x), m_type(type) {}
virtual ~GoASTTypeAssertExpr() { }
const char* GetKindName() const { return "TypeAssertExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eTypeAssertExpr; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
const GoASTExpr* GetType() const { return m_type.get(); }
void SetType(GoASTExpr* type) { m_type.reset(type); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTExpr> m_x;
std::unique_ptr<GoASTExpr> m_type;
GoASTTypeAssertExpr(const GoASTTypeAssertExpr&) = delete;
const GoASTTypeAssertExpr& operator=(const GoASTTypeAssertExpr&) = delete;
};
class GoASTTypeSpec : public GoASTSpec
{
public:
GoASTTypeSpec(GoASTIdent* name, GoASTExpr* type) : GoASTSpec(eTypeSpec), m_name(name), m_type(type) {}
virtual ~GoASTTypeSpec() { }
const char* GetKindName() const { return "TypeSpec"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eTypeSpec; }
const GoASTIdent* GetName() const { return m_name.get(); }
void SetName(GoASTIdent* name) { m_name.reset(name); }
const GoASTExpr* GetType() const { return m_type.get(); }
void SetType(GoASTExpr* type) { m_type.reset(type); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTIdent> m_name;
std::unique_ptr<GoASTExpr> m_type;
GoASTTypeSpec(const GoASTTypeSpec&) = delete;
const GoASTTypeSpec& operator=(const GoASTTypeSpec&) = delete;
};
class GoASTTypeSwitchStmt : public GoASTStmt
{
public:
GoASTTypeSwitchStmt(GoASTStmt* init, GoASTStmt* assign, GoASTBlockStmt* body) : GoASTStmt(eTypeSwitchStmt), m_init(init), m_assign(assign), m_body(body) {}
virtual ~GoASTTypeSwitchStmt() { }
const char* GetKindName() const { return "TypeSwitchStmt"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eTypeSwitchStmt; }
const GoASTStmt* GetInit() const { return m_init.get(); }
void SetInit(GoASTStmt* init) { m_init.reset(init); }
const GoASTStmt* GetAssign() const { return m_assign.get(); }
void SetAssign(GoASTStmt* assign) { m_assign.reset(assign); }
const GoASTBlockStmt* GetBody() const { return m_body.get(); }
void SetBody(GoASTBlockStmt* body) { m_body.reset(body); }
private:
friend class GoASTNode;
std::unique_ptr<GoASTStmt> m_init;
std::unique_ptr<GoASTStmt> m_assign;
std::unique_ptr<GoASTBlockStmt> m_body;
GoASTTypeSwitchStmt(const GoASTTypeSwitchStmt&) = delete;
const GoASTTypeSwitchStmt& operator=(const GoASTTypeSwitchStmt&) = delete;
};
class GoASTUnaryExpr : public GoASTExpr
{
public:
GoASTUnaryExpr(TokenType op, GoASTExpr* x) : GoASTExpr(eUnaryExpr), m_op(op), m_x(x) {}
virtual ~GoASTUnaryExpr() { }
const char* GetKindName() const { return "UnaryExpr"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eUnaryExpr; }
TokenType GetOp() const { return m_op; }
void SetOp(TokenType op) { m_op = op; }
const GoASTExpr* GetX() const { return m_x.get(); }
void SetX(GoASTExpr* x) { m_x.reset(x); }
private:
friend class GoASTNode;
TokenType m_op;
std::unique_ptr<GoASTExpr> m_x;
GoASTUnaryExpr(const GoASTUnaryExpr&) = delete;
const GoASTUnaryExpr& operator=(const GoASTUnaryExpr&) = delete;
};
class GoASTValueSpec : public GoASTSpec
{
public:
GoASTValueSpec() : GoASTSpec(eValueSpec) {}
virtual ~GoASTValueSpec() { }
const char* GetKindName() const { return "ValueSpec"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == eValueSpec; }
size_t NumNames() const { return m_names.size(); }
const GoASTIdent* GetNames(int i) const { return m_names[i].get(); }
void AddNames(GoASTIdent* names) { m_names.push_back(std::unique_ptr<GoASTIdent>(names)); }
const GoASTExpr* GetType() const { return m_type.get(); }
void SetType(GoASTExpr* type) { m_type.reset(type); }
size_t NumValues() const { return m_values.size(); }
const GoASTExpr* GetValues(int i) const { return m_values[i].get(); }
void AddValues(GoASTExpr* values) { m_values.push_back(std::unique_ptr<GoASTExpr>(values)); }
private:
friend class GoASTNode;
std::vector<std::unique_ptr<GoASTIdent> > m_names;
std::unique_ptr<GoASTExpr> m_type;
std::vector<std::unique_ptr<GoASTExpr> > m_values;
GoASTValueSpec(const GoASTValueSpec&) = delete;
const GoASTValueSpec& operator=(const GoASTValueSpec&) = delete;
};
template <typename R, typename V>
R GoASTDecl::Visit(V* v) const
{
switch(GetKind())
{
case eBadDecl:
return v->VisitBadDecl(llvm::cast<const GoASTBadDecl>(this));
case eFuncDecl:
return v->VisitFuncDecl(llvm::cast<const GoASTFuncDecl>(this));
case eGenDecl:
return v->VisitGenDecl(llvm::cast<const GoASTGenDecl>(this));
default:
assert(false && "Invalid kind");
}
}
template <typename R, typename V>
R GoASTExpr::Visit(V* v) const
{
switch(GetKind())
{
case eArrayType:
return v->VisitArrayType(llvm::cast<const GoASTArrayType>(this));
case eBadExpr:
return v->VisitBadExpr(llvm::cast<const GoASTBadExpr>(this));
case eBasicLit:
return v->VisitBasicLit(llvm::cast<const GoASTBasicLit>(this));
case eBinaryExpr:
return v->VisitBinaryExpr(llvm::cast<const GoASTBinaryExpr>(this));
case eIdent:
return v->VisitIdent(llvm::cast<const GoASTIdent>(this));
case eCallExpr:
return v->VisitCallExpr(llvm::cast<const GoASTCallExpr>(this));
case eChanType:
return v->VisitChanType(llvm::cast<const GoASTChanType>(this));
case eCompositeLit:
return v->VisitCompositeLit(llvm::cast<const GoASTCompositeLit>(this));
case eEllipsis:
return v->VisitEllipsis(llvm::cast<const GoASTEllipsis>(this));
case eFuncType:
return v->VisitFuncType(llvm::cast<const GoASTFuncType>(this));
case eFuncLit:
return v->VisitFuncLit(llvm::cast<const GoASTFuncLit>(this));
case eIndexExpr:
return v->VisitIndexExpr(llvm::cast<const GoASTIndexExpr>(this));
case eInterfaceType:
return v->VisitInterfaceType(llvm::cast<const GoASTInterfaceType>(this));
case eKeyValueExpr:
return v->VisitKeyValueExpr(llvm::cast<const GoASTKeyValueExpr>(this));
case eMapType:
return v->VisitMapType(llvm::cast<const GoASTMapType>(this));
case eParenExpr:
return v->VisitParenExpr(llvm::cast<const GoASTParenExpr>(this));
case eSelectorExpr:
return v->VisitSelectorExpr(llvm::cast<const GoASTSelectorExpr>(this));
case eSliceExpr:
return v->VisitSliceExpr(llvm::cast<const GoASTSliceExpr>(this));
case eStarExpr:
return v->VisitStarExpr(llvm::cast<const GoASTStarExpr>(this));
case eStructType:
return v->VisitStructType(llvm::cast<const GoASTStructType>(this));
case eTypeAssertExpr:
return v->VisitTypeAssertExpr(llvm::cast<const GoASTTypeAssertExpr>(this));
case eUnaryExpr:
return v->VisitUnaryExpr(llvm::cast<const GoASTUnaryExpr>(this));
default:
assert(false && "Invalid kind");
}
}
template <typename R, typename V>
R GoASTSpec::Visit(V* v) const
{
switch(GetKind())
{
case eImportSpec:
return v->VisitImportSpec(llvm::cast<const GoASTImportSpec>(this));
case eTypeSpec:
return v->VisitTypeSpec(llvm::cast<const GoASTTypeSpec>(this));
case eValueSpec:
return v->VisitValueSpec(llvm::cast<const GoASTValueSpec>(this));
default:
assert(false && "Invalid kind");
}
}
template <typename R, typename V>
R GoASTStmt::Visit(V* v) const
{
switch(GetKind())
{
case eAssignStmt:
return v->VisitAssignStmt(llvm::cast<const GoASTAssignStmt>(this));
case eBadStmt:
return v->VisitBadStmt(llvm::cast<const GoASTBadStmt>(this));
case eBlockStmt:
return v->VisitBlockStmt(llvm::cast<const GoASTBlockStmt>(this));
case eBranchStmt:
return v->VisitBranchStmt(llvm::cast<const GoASTBranchStmt>(this));
case eCaseClause:
return v->VisitCaseClause(llvm::cast<const GoASTCaseClause>(this));
case eCommClause:
return v->VisitCommClause(llvm::cast<const GoASTCommClause>(this));
case eDeclStmt:
return v->VisitDeclStmt(llvm::cast<const GoASTDeclStmt>(this));
case eDeferStmt:
return v->VisitDeferStmt(llvm::cast<const GoASTDeferStmt>(this));
case eEmptyStmt:
return v->VisitEmptyStmt(llvm::cast<const GoASTEmptyStmt>(this));
case eExprStmt:
return v->VisitExprStmt(llvm::cast<const GoASTExprStmt>(this));
case eForStmt:
return v->VisitForStmt(llvm::cast<const GoASTForStmt>(this));
case eGoStmt:
return v->VisitGoStmt(llvm::cast<const GoASTGoStmt>(this));
case eIfStmt:
return v->VisitIfStmt(llvm::cast<const GoASTIfStmt>(this));
case eIncDecStmt:
return v->VisitIncDecStmt(llvm::cast<const GoASTIncDecStmt>(this));
case eLabeledStmt:
return v->VisitLabeledStmt(llvm::cast<const GoASTLabeledStmt>(this));
case eRangeStmt:
return v->VisitRangeStmt(llvm::cast<const GoASTRangeStmt>(this));
case eReturnStmt:
return v->VisitReturnStmt(llvm::cast<const GoASTReturnStmt>(this));
case eSelectStmt:
return v->VisitSelectStmt(llvm::cast<const GoASTSelectStmt>(this));
case eSendStmt:
return v->VisitSendStmt(llvm::cast<const GoASTSendStmt>(this));
case eSwitchStmt:
return v->VisitSwitchStmt(llvm::cast<const GoASTSwitchStmt>(this));
case eTypeSwitchStmt:
return v->VisitTypeSwitchStmt(llvm::cast<const GoASTTypeSwitchStmt>(this));
default:
assert(false && "Invalid kind");
}
}
template <typename V>
void GoASTNode::WalkChildren(V &v)
{
switch (m_kind)
{
case eArrayType:
{
GoASTArrayType* n = llvm::cast<GoASTArrayType>(this);
(void)n;
v(n->m_len.get());
v(n->m_elt.get());
return;
}
case eAssignStmt:
{
GoASTAssignStmt* n = llvm::cast<GoASTAssignStmt>(this);
(void)n;
for (auto& e : n->m_lhs) { v(e.get()); }
for (auto& e : n->m_rhs) { v(e.get()); }
return;
}
case eBasicLit:
{
GoASTBasicLit* n = llvm::cast<GoASTBasicLit>(this);
(void)n;
return;
}
case eBinaryExpr:
{
GoASTBinaryExpr* n = llvm::cast<GoASTBinaryExpr>(this);
(void)n;
v(n->m_x.get());
v(n->m_y.get());
return;
}
case eBlockStmt:
{
GoASTBlockStmt* n = llvm::cast<GoASTBlockStmt>(this);
(void)n;
for (auto& e : n->m_list) { v(e.get()); }
return;
}
case eIdent:
{
GoASTIdent* n = llvm::cast<GoASTIdent>(this);
(void)n;
return;
}
case eBranchStmt:
{
GoASTBranchStmt* n = llvm::cast<GoASTBranchStmt>(this);
(void)n;
v(n->m_label.get());
return;
}
case eCallExpr:
{
GoASTCallExpr* n = llvm::cast<GoASTCallExpr>(this);
(void)n;
v(n->m_fun.get());
for (auto& e : n->m_args) { v(e.get()); }
return;
}
case eCaseClause:
{
GoASTCaseClause* n = llvm::cast<GoASTCaseClause>(this);
(void)n;
for (auto& e : n->m_list) { v(e.get()); }
for (auto& e : n->m_body) { v(e.get()); }
return;
}
case eChanType:
{
GoASTChanType* n = llvm::cast<GoASTChanType>(this);
(void)n;
v(n->m_value.get());
return;
}
case eCommClause:
{
GoASTCommClause* n = llvm::cast<GoASTCommClause>(this);
(void)n;
v(n->m_comm.get());
for (auto& e : n->m_body) { v(e.get()); }
return;
}
case eCompositeLit:
{
GoASTCompositeLit* n = llvm::cast<GoASTCompositeLit>(this);
(void)n;
v(n->m_type.get());
for (auto& e : n->m_elts) { v(e.get()); }
return;
}
case eDeclStmt:
{
GoASTDeclStmt* n = llvm::cast<GoASTDeclStmt>(this);
(void)n;
v(n->m_decl.get());
return;
}
case eDeferStmt:
{
GoASTDeferStmt* n = llvm::cast<GoASTDeferStmt>(this);
(void)n;
v(n->m_call.get());
return;
}
case eEllipsis:
{
GoASTEllipsis* n = llvm::cast<GoASTEllipsis>(this);
(void)n;
v(n->m_elt.get());
return;
}
case eExprStmt:
{
GoASTExprStmt* n = llvm::cast<GoASTExprStmt>(this);
(void)n;
v(n->m_x.get());
return;
}
case eField:
{
GoASTField* n = llvm::cast<GoASTField>(this);
(void)n;
for (auto& e : n->m_names) { v(e.get()); }
v(n->m_type.get());
v(n->m_tag.get());
return;
}
case eFieldList:
{
GoASTFieldList* n = llvm::cast<GoASTFieldList>(this);
(void)n;
for (auto& e : n->m_list) { v(e.get()); }
return;
}
case eForStmt:
{
GoASTForStmt* n = llvm::cast<GoASTForStmt>(this);
(void)n;
v(n->m_init.get());
v(n->m_cond.get());
v(n->m_post.get());
v(n->m_body.get());
return;
}
case eFuncType:
{
GoASTFuncType* n = llvm::cast<GoASTFuncType>(this);
(void)n;
v(n->m_params.get());
v(n->m_results.get());
return;
}
case eFuncDecl:
{
GoASTFuncDecl* n = llvm::cast<GoASTFuncDecl>(this);
(void)n;
v(n->m_recv.get());
v(n->m_name.get());
v(n->m_type.get());
v(n->m_body.get());
return;
}
case eFuncLit:
{
GoASTFuncLit* n = llvm::cast<GoASTFuncLit>(this);
(void)n;
v(n->m_type.get());
v(n->m_body.get());
return;
}
case eGenDecl:
{
GoASTGenDecl* n = llvm::cast<GoASTGenDecl>(this);
(void)n;
for (auto& e : n->m_specs) { v(e.get()); }
return;
}
case eGoStmt:
{
GoASTGoStmt* n = llvm::cast<GoASTGoStmt>(this);
(void)n;
v(n->m_call.get());
return;
}
case eIfStmt:
{
GoASTIfStmt* n = llvm::cast<GoASTIfStmt>(this);
(void)n;
v(n->m_init.get());
v(n->m_cond.get());
v(n->m_body.get());
v(n->m_els.get());
return;
}
case eImportSpec:
{
GoASTImportSpec* n = llvm::cast<GoASTImportSpec>(this);
(void)n;
v(n->m_name.get());
v(n->m_path.get());
return;
}
case eIncDecStmt:
{
GoASTIncDecStmt* n = llvm::cast<GoASTIncDecStmt>(this);
(void)n;
v(n->m_x.get());
return;
}
case eIndexExpr:
{
GoASTIndexExpr* n = llvm::cast<GoASTIndexExpr>(this);
(void)n;
v(n->m_x.get());
v(n->m_index.get());
return;
}
case eInterfaceType:
{
GoASTInterfaceType* n = llvm::cast<GoASTInterfaceType>(this);
(void)n;
v(n->m_methods.get());
return;
}
case eKeyValueExpr:
{
GoASTKeyValueExpr* n = llvm::cast<GoASTKeyValueExpr>(this);
(void)n;
v(n->m_key.get());
v(n->m_value.get());
return;
}
case eLabeledStmt:
{
GoASTLabeledStmt* n = llvm::cast<GoASTLabeledStmt>(this);
(void)n;
v(n->m_label.get());
v(n->m_stmt.get());
return;
}
case eMapType:
{
GoASTMapType* n = llvm::cast<GoASTMapType>(this);
(void)n;
v(n->m_key.get());
v(n->m_value.get());
return;
}
case eParenExpr:
{
GoASTParenExpr* n = llvm::cast<GoASTParenExpr>(this);
(void)n;
v(n->m_x.get());
return;
}
case eRangeStmt:
{
GoASTRangeStmt* n = llvm::cast<GoASTRangeStmt>(this);
(void)n;
v(n->m_key.get());
v(n->m_value.get());
v(n->m_x.get());
v(n->m_body.get());
return;
}
case eReturnStmt:
{
GoASTReturnStmt* n = llvm::cast<GoASTReturnStmt>(this);
(void)n;
for (auto& e : n->m_results) { v(e.get()); }
return;
}
case eSelectStmt:
{
GoASTSelectStmt* n = llvm::cast<GoASTSelectStmt>(this);
(void)n;
v(n->m_body.get());
return;
}
case eSelectorExpr:
{
GoASTSelectorExpr* n = llvm::cast<GoASTSelectorExpr>(this);
(void)n;
v(n->m_x.get());
v(n->m_sel.get());
return;
}
case eSendStmt:
{
GoASTSendStmt* n = llvm::cast<GoASTSendStmt>(this);
(void)n;
v(n->m_chan.get());
v(n->m_value.get());
return;
}
case eSliceExpr:
{
GoASTSliceExpr* n = llvm::cast<GoASTSliceExpr>(this);
(void)n;
v(n->m_x.get());
v(n->m_low.get());
v(n->m_high.get());
v(n->m_max.get());
return;
}
case eStarExpr:
{
GoASTStarExpr* n = llvm::cast<GoASTStarExpr>(this);
(void)n;
v(n->m_x.get());
return;
}
case eStructType:
{
GoASTStructType* n = llvm::cast<GoASTStructType>(this);
(void)n;
v(n->m_fields.get());
return;
}
case eSwitchStmt:
{
GoASTSwitchStmt* n = llvm::cast<GoASTSwitchStmt>(this);
(void)n;
v(n->m_init.get());
v(n->m_tag.get());
v(n->m_body.get());
return;
}
case eTypeAssertExpr:
{
GoASTTypeAssertExpr* n = llvm::cast<GoASTTypeAssertExpr>(this);
(void)n;
v(n->m_x.get());
v(n->m_type.get());
return;
}
case eTypeSpec:
{
GoASTTypeSpec* n = llvm::cast<GoASTTypeSpec>(this);
(void)n;
v(n->m_name.get());
v(n->m_type.get());
return;
}
case eTypeSwitchStmt:
{
GoASTTypeSwitchStmt* n = llvm::cast<GoASTTypeSwitchStmt>(this);
(void)n;
v(n->m_init.get());
v(n->m_assign.get());
v(n->m_body.get());
return;
}
case eUnaryExpr:
{
GoASTUnaryExpr* n = llvm::cast<GoASTUnaryExpr>(this);
(void)n;
v(n->m_x.get());
return;
}
case eValueSpec:
{
GoASTValueSpec* n = llvm::cast<GoASTValueSpec>(this);
(void)n;
for (auto& e : n->m_names) { v(e.get()); }
v(n->m_type.get());
for (auto& e : n->m_values) { v(e.get()); }
return;
}
default:
break;
brucemUnsubmitted
Not Done
ReplyInline Actions

Could this default go away if all of the possible values for that enumeration are covered here? If so, we'd get a compile time warning here when someone adds something to the enumeration.

brucem: Could this default go away if all of the possible values for that enumeration are covered here?
}
}
} // namespace lldb_private
#endif

source/Plugins/ExpressionParser/Go/GoLexer.h

  • This file was added.
//===-- GoLexer.h -----------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_GoLexer_h
#define liblldb_GoLexer_h
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringMap.h"
namespace lldb_private
{
class GoLexer {
public:
explicit GoLexer(const char* src);
enum TokenType {
TOK_EOF,
TOK_INVALID,
TOK_IDENTIFIER,
LIT_INTEGER,
LIT_FLOAT,
LIT_IMAGINARY,
LIT_RUNE,
LIT_STRING,
KEYWORD_BREAK,
KEYWORD_DEFAULT,
KEYWORD_FUNC,
KEYWORD_INTERFACE,
KEYWORD_SELECT,
KEYWORD_CASE,
KEYWORD_DEFER,
KEYWORD_GO,
KEYWORD_MAP,
KEYWORD_STRUCT,
KEYWORD_CHAN,
KEYWORD_ELSE,
KEYWORD_GOTO,
KEYWORD_PACKAGE,
KEYWORD_SWITCH,
KEYWORD_CONST,
KEYWORD_FALLTHROUGH,
KEYWORD_IF,
KEYWORD_RANGE,
KEYWORD_TYPE,
KEYWORD_CONTINUE,
KEYWORD_FOR,
KEYWORD_IMPORT,
KEYWORD_RETURN,
KEYWORD_VAR,
OP_PLUS,
OP_MINUS,
OP_STAR,
OP_SLASH,
OP_PERCENT,
OP_AMP,
OP_PIPE,
OP_CARET,
OP_LSHIFT,
OP_RSHIFT,
OP_AMP_CARET,
OP_PLUS_EQ,
OP_MINUS_EQ,
OP_STAR_EQ,
OP_SLASH_EQ,
OP_PERCENT_EQ,
OP_AMP_EQ,
OP_PIPE_EQ,
OP_CARET_EQ,
OP_LSHIFT_EQ,
OP_RSHIFT_EQ,
OP_AMP_CARET_EQ,
OP_AMP_AMP,
OP_PIPE_PIPE,
OP_LT_MINUS,
OP_PLUS_PLUS,
OP_MINUS_MINUS,
OP_EQ_EQ,
OP_LT,
OP_GT,
OP_EQ,
OP_BANG,
OP_BANG_EQ,
OP_LT_EQ,
OP_GT_EQ,
OP_COLON_EQ,
OP_DOTS,
OP_LPAREN,
OP_LBRACK,
OP_LBRACE,
OP_COMMA,
OP_DOT,
OP_RPAREN,
OP_RBRACK,
OP_RBRACE,
OP_SEMICOLON,
OP_COLON,
};
struct Token
{
explicit Token(TokenType t, llvm::StringRef text) : m_type(t), m_value(text) { }
TokenType m_type;
llvm::StringRef m_value;
};
const Token& Lex();
size_t BytesRemaining() const { return m_end - m_src; }
llvm::StringRef GetString(int len) const { return llvm::StringRef(m_src, len); }
static TokenType LookupKeyword(llvm::StringRef id);
static llvm::StringRef LookupToken(TokenType t);
private:
bool IsDecimal(char c)
{
return c >= '0' && c <= '9';
}
bool IsHexChar(char c)
{
if (c >= '0' && c <= '9')
return true;
if (c >= 'A' && c <= 'F')
return true;
if (c >= 'a' && c <= 'f')
return true;
return false;
}
bool IsLetterOrDigit(char c)
{
if (c >= 'a' && c <= 'z')
return true;
if (c >= 'A' && c <= 'Z')
return true;
if (c == '_')
return true;
if (c >= '0' && c <= '9')
return true;
// Treat all non-ascii chars as letters for simplicity.
return 0 != (c & 0x80);
}
bool IsWhitespace(char c)
{
switch (c)
{
case ' ': case '\t': case '\r':
return true;
}
return false;
}
bool SkipWhitespace();
bool SkipComment();
TokenType InternalLex(bool newline);
TokenType DoOperator();
TokenType DoIdent();
TokenType DoNumber();
TokenType DoRune();
TokenType DoString();
static llvm::StringMap<TokenType>* InitKeywords();
static llvm::StringMap<TokenType>* m_keywords;
const char* m_src;
const char* m_end;
Token m_last_token;
};
} // namespace lldb_private
#endif

source/Plugins/ExpressionParser/Go/GoLexer.cpp

  • This file was added.
//===-- GoLexer.cpp ---------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <string.h>
#include "GoLexer.h"
using namespace lldb_private;
llvm::StringMap<GoLexer::TokenType>* GoLexer::m_keywords;
GoLexer::GoLexer(const char* src) : m_src(src), m_end(src + strlen(src)), m_last_token(TOK_INVALID, "")
{
}
bool
GoLexer::SkipWhitespace()
{
bool saw_newline = false;
for (;m_src < m_end; ++m_src) {
if (*m_src == '\n')
saw_newline = true;
if (*m_src == '/' && !SkipComment())
return saw_newline;
else if (!IsWhitespace(*m_src))
return saw_newline;
}
return saw_newline;
}
bool
GoLexer::SkipComment()
{
if (m_src[0] == '/' && m_src[1] == '/')
{
for (const char* c = m_src + 2; c < m_end; ++c)
{
if (*c == '\n')
{
m_src = c - 1;
return true;
}
}
return true;
}
else if (m_src[0] == '/' && m_src[1] == '*')
{
for (const char* c = m_src + 2; c < m_end; ++c)
{
if (c[0] == '*' && c[1] == '/')
{
m_src = c + 1;
return true;
}
}
}
return false;
}
const GoLexer::Token&
GoLexer::Lex()
{
bool newline = SkipWhitespace();
const char* start = m_src;
m_last_token.m_type = InternalLex(newline);
m_last_token.m_value = llvm::StringRef(start, m_src - start);
return m_last_token;
}
GoLexer::TokenType
GoLexer::InternalLex(bool newline)
{
if (m_src >= m_end) {
return TOK_EOF;
}
if (newline)
{
switch (m_last_token.m_type)
{
case TOK_IDENTIFIER:
case LIT_FLOAT:
case LIT_IMAGINARY:
case LIT_INTEGER:
case LIT_RUNE:
case LIT_STRING:
case KEYWORD_BREAK:
case KEYWORD_CONTINUE:
case KEYWORD_FALLTHROUGH:
case KEYWORD_RETURN:
case OP_PLUS_PLUS:
case OP_MINUS_MINUS:
case OP_RPAREN:
case OP_RBRACK:
case OP_RBRACE:
return OP_SEMICOLON;
default:
break;
}
}
char c = *m_src;
switch (c)
{
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
return DoNumber();
case '+': case '-': case '*': case '/': case '%':
case '&': case '|': case '^': case '<': case '>':
case '!': case ':': case ';': case '(': case ')':
case '[': case ']': case '{': case '}': case ',':
case '=':
return DoOperator();
case '.':
if (IsDecimal(m_src[1]))
return DoNumber();
return DoOperator();
case '$':
// For lldb persistent vars.
return DoIdent();
case '"': case '`':
return DoString();
case '\'':
return DoRune();
default:
break;
}
if (IsLetterOrDigit(c))
return DoIdent();
++m_src;
return TOK_INVALID;
}
GoLexer::TokenType
GoLexer::DoOperator()
{
TokenType t = TOK_INVALID;
if (m_end - m_src > 2)
{
t = LookupKeyword(llvm::StringRef(m_src, 3));
if (t != TOK_INVALID)
m_src += 3;
}
if (t == TOK_INVALID && m_end - m_src > 1)
{
t = LookupKeyword(llvm::StringRef(m_src, 2));
if (t != TOK_INVALID)
m_src += 2;
}
if (t == TOK_INVALID)
{
t = LookupKeyword(llvm::StringRef(m_src, 1));
++m_src;
}
return t;
}
GoLexer::TokenType
GoLexer::DoIdent()
{
const char* start = m_src++;
while (m_src < m_end && IsLetterOrDigit(*m_src)) {
++m_src;
}
TokenType kw = LookupKeyword(llvm::StringRef(start, m_src - start));
if (kw != TOK_INVALID)
return kw;
return TOK_IDENTIFIER;
}
GoLexer::TokenType
GoLexer::DoNumber()
{
if (m_src[0] == '0' && (m_src[1] == 'x' || m_src[1] == 'X'))
{
m_src += 2;
while (IsHexChar(*m_src))
++m_src;
return LIT_INTEGER;
}
bool dot_ok = true;
bool e_ok = true;
while (true) {
while (IsDecimal(*m_src))
++m_src;
switch (*m_src)
{
case 'i':
++m_src;
return LIT_IMAGINARY;
case '.':
if (!dot_ok)
return LIT_FLOAT;
++m_src;
dot_ok = false;
break;
case 'e': case 'E':
if (!e_ok)
return LIT_FLOAT;
dot_ok = e_ok = false;
++m_src;
if (*m_src == '+' || *m_src == '-')
++m_src;
break;
default:
if (dot_ok)
return LIT_INTEGER;
return LIT_FLOAT;
}
}
}
GoLexer::TokenType
GoLexer::DoRune()
{
while (++m_src < m_end)
{
switch (*m_src)
{
case '\'':
++m_src;
return LIT_RUNE;
case '\n':
return TOK_INVALID;
case '\\':
if (m_src[1] == '\n')
return TOK_INVALID;
++m_src;
}
}
return TOK_INVALID;
}
GoLexer::TokenType
GoLexer::DoString()
{
if (*m_src == '`')
{
while (++m_src < m_end)
{
if (*m_src == '`')
{
++m_src;
return LIT_STRING;
}
}
return TOK_INVALID;
}
while (++m_src < m_end)
{
switch (*m_src)
{
case '"':
++m_src;
return LIT_STRING;
case '\n':
return TOK_INVALID;
case '\\':
if (m_src[1] == '\n')
return TOK_INVALID;
++m_src;
}
}
return TOK_INVALID;
}
GoLexer::TokenType
GoLexer::LookupKeyword(llvm::StringRef id)
{
if (m_keywords == nullptr)
m_keywords = InitKeywords();
const auto& it = m_keywords->find(id);
if (it == m_keywords->end())
return TOK_INVALID;
return it->second;
}
llvm::StringRef
GoLexer::LookupToken(TokenType t)
{
if (m_keywords == nullptr)
m_keywords = InitKeywords();
for (const auto& e : *m_keywords)
{
if (e.getValue() == t)
return e.getKey();
}
return "";
}
llvm::StringMap<GoLexer::TokenType>*
GoLexer::InitKeywords()
{
auto& result = *new llvm::StringMap<TokenType>(128);
result["break"] = KEYWORD_BREAK;
result["default"] = KEYWORD_DEFAULT;
result["func"] = KEYWORD_FUNC;
result["interface"] = KEYWORD_INTERFACE;
result["select"] = KEYWORD_SELECT;
result["case"] = KEYWORD_CASE;
result["defer"] = KEYWORD_DEFER;
result["go"] = KEYWORD_GO;
result["map"] = KEYWORD_MAP;
result["struct"] = KEYWORD_STRUCT;
result["chan"] = KEYWORD_CHAN;
result["else"] = KEYWORD_ELSE;
result["goto"] = KEYWORD_GOTO;
result["package"] = KEYWORD_PACKAGE;
result["switch"] = KEYWORD_SWITCH;
result["const"] = KEYWORD_CONST;
result["fallthrough"] = KEYWORD_FALLTHROUGH;
result["if"] = KEYWORD_IF;
result["range"] = KEYWORD_RANGE;
result["type"] = KEYWORD_TYPE;
result["continue"] = KEYWORD_CONTINUE;
result["for"] = KEYWORD_FOR;
result["import"] = KEYWORD_IMPORT;
result["return"] = KEYWORD_RETURN;
result["var"] = KEYWORD_VAR;
result["+"] = OP_PLUS;
result["-"] = OP_MINUS;
result["*"] = OP_STAR;
result["/"] = OP_SLASH;
result["%"] = OP_PERCENT;
result["&"] = OP_AMP;
result["|"] = OP_PIPE;
result["^"] = OP_CARET;
result["<<"] = OP_LSHIFT;
result[">>"] = OP_RSHIFT;
result["&^"] = OP_AMP_CARET;
result["+="] = OP_PLUS_EQ;
result["-="] = OP_MINUS_EQ;
result["*="] = OP_STAR_EQ;
result["/="] = OP_SLASH_EQ;
result["%="] = OP_PERCENT_EQ;
result["&="] = OP_AMP_EQ;
result["|="] = OP_PIPE_EQ;
result["^="] = OP_CARET_EQ;
result["<<="] = OP_LSHIFT_EQ;
result[">>="] = OP_RSHIFT_EQ;
result["&^="] = OP_AMP_CARET_EQ;
result["&&"] = OP_AMP_AMP;
result["||"] = OP_PIPE_PIPE;
result["<-"] = OP_LT_MINUS;
result["++"] = OP_PLUS_PLUS;
result["--"] = OP_MINUS_MINUS;
result["=="] = OP_EQ_EQ;
result["<"] = OP_LT;
result[">"] = OP_GT;
result["="] = OP_EQ;
result["!"] = OP_BANG;
result["!="] = OP_BANG_EQ;
result["<="] = OP_LT_EQ;
result[">="] = OP_GT_EQ;
result[":="] = OP_COLON_EQ;
result["..."] = OP_DOTS;
result["("] = OP_LPAREN;
result["["] = OP_LBRACK;
result["{"] = OP_LBRACE;
result[","] = OP_COMMA;
result["."] = OP_DOT;
result[")"] = OP_RPAREN;
result["]"] = OP_RBRACK;
result["}"] = OP_RBRACE;
result[";"] = OP_SEMICOLON;
result[":"] = OP_COLON;
return &result;
}

source/Plugins/ExpressionParser/Go/GoParser.h

  • This file was added.
//===-- GoParser.h -----------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_GoParser_h
#define liblldb_GoParser_h
#include "lldb/lldb-private.h"
#include "Plugins/ExpressionParser/Go/GoAST.h"
#include "Plugins/ExpressionParser/Go/GoLexer.h"
namespace lldb_private
{
class GoParser
{
public:
explicit GoParser(const char* src);
GoASTStmt* Statement();
GoASTStmt* GoStmt();
GoASTStmt* ReturnStmt();
GoASTStmt* BranchStmt();
GoASTStmt* EmptyStmt();
GoASTStmt* ExpressionStmt(GoASTExpr* e);
GoASTStmt* IncDecStmt(GoASTExpr* e);
GoASTStmt* Assignment(GoASTExpr* e);
GoASTBlockStmt* Block();
GoASTExpr* MoreExpressionList(); // ["," Expression]
GoASTIdent* MoreIdentifierList(); // ["," Identifier]
GoASTExpr* Expression();
GoASTExpr* UnaryExpr();
GoASTExpr* OrExpr();
GoASTExpr* AndExpr();
GoASTExpr* RelExpr();
GoASTExpr* AddExpr();
GoASTExpr* MulExpr();
GoASTExpr* PrimaryExpr();
GoASTExpr* Operand();
GoASTExpr* Conversion();
GoASTExpr* Selector(GoASTExpr* e);
GoASTExpr* IndexOrSlice(GoASTExpr* e);
GoASTExpr* TypeAssertion(GoASTExpr* e);
GoASTExpr* Arguments(GoASTExpr* e);
GoASTExpr* Type();
GoASTExpr* Type2();
GoASTExpr* ArrayOrSliceType(bool allowEllipsis);
GoASTExpr* StructType();
GoASTExpr* FunctionType();
GoASTExpr* InterfaceType();
GoASTExpr* MapType();
GoASTExpr* ChanType();
GoASTExpr* ChanType2();
GoASTExpr* Name();
GoASTExpr* QualifiedIdent(GoASTIdent* p);
GoASTIdent* Identifier();
GoASTField* FieldDecl();
GoASTExpr* AnonymousFieldType();
GoASTExpr* FieldNamesAndType(GoASTField* f);
GoASTFieldList* Params();
GoASTField* ParamDecl();
GoASTExpr* ParamType();
GoASTFuncType* Signature();
GoASTExpr* CompositeLit();
GoASTExpr* FunctionLit();
GoASTExpr* Element();
GoASTCompositeLit* LiteralValue();
bool Failed() const { return m_failed; }
bool AtEOF() const { return m_lexer.BytesRemaining() == 0 && m_pos == m_tokens.size(); }
void GetError(Error& error);
private:
class Rule;
friend class Rule;
std::nullptr_t syntaxerror() {
m_failed = true;
return nullptr;
}
GoLexer::Token& next() {
if (m_pos >= m_tokens.size())
{
if (m_pos != 0 && (m_tokens.back().m_type == GoLexer::TOK_EOF ||
m_tokens.back().m_type == GoLexer::TOK_INVALID))
return m_tokens.back();
m_pos = m_tokens.size();
m_tokens.push_back(m_lexer.Lex());
}
return m_tokens[m_pos++];
}
GoLexer::TokenType peek() {
GoLexer::Token& tok = next();
--m_pos;
return tok.m_type;
}
GoLexer::Token* match(GoLexer::TokenType t) {
GoLexer::Token& tok = next();
if (tok.m_type == t)
return &tok;
--m_pos;
m_last_tok = t;
return nullptr;
}
GoLexer::Token* mustMatch(GoLexer::TokenType t) {
GoLexer::Token* tok = match(t);
if (tok)
return tok;
return syntaxerror();
}
bool Semicolon();
GoASTStmt* FinishStmt(GoASTStmt* s) {
if (!Semicolon())
m_failed = true;
return s;
}
llvm::StringRef CopyString(llvm::StringRef s);
GoLexer m_lexer;
std::vector<GoLexer::Token> m_tokens;
size_t m_pos;
llvm::StringRef m_error;
llvm::StringRef m_last;
GoLexer::TokenType m_last_tok;
llvm::StringMap<uint8_t> m_strings;
bool m_failed;
};
}
#endif

source/Plugins/ExpressionParser/Go/GoParser.cpp

  • This file was added.
//===-- GoParser.cpp ---------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <vector>
#include "GoParser.h"
#include "lldb/Core/Error.h"
#include "llvm/ADT/SmallString.h"
#include "Plugins/ExpressionParser/Go/GoAST.h"
using namespace lldb_private;
using namespace lldb;
namespace {
llvm::StringRef DescribeToken(GoLexer::TokenType t) {
switch (t)
{
case GoLexer::TOK_EOF:
return "<eof>";
case GoLexer::TOK_IDENTIFIER:
return "identifier";
case GoLexer::LIT_FLOAT:
return "float";
case GoLexer::LIT_IMAGINARY:
return "imaginary";
case GoLexer::LIT_INTEGER:
return "integer";
case GoLexer::LIT_RUNE:
return "rune";
case GoLexer::LIT_STRING:
return "string";
default:
return GoLexer::LookupToken(t);
}
}
} // namespace
class GoParser::Rule
{
public:
Rule(llvm::StringRef name, GoParser* p) : m_name(name), m_parser(p), m_pos(p->m_pos) {}
std::nullptr_t error() {
if (!m_parser->m_failed)
{
// Set m_error in case this is the top level.
if (m_parser->m_last_tok == GoLexer::TOK_INVALID)
m_parser->m_error = m_parser->m_last;
else
m_parser->m_error = DescribeToken(m_parser->m_last_tok);
// And set m_last in case it isn't.
m_parser->m_last = m_name;
m_parser->m_last_tok = GoLexer::TOK_INVALID;
m_parser->m_pos = m_pos;
}
return nullptr;
}
private:
llvm::StringRef m_name;
GoParser* m_parser;
size_t m_pos;
};
GoParser::GoParser(const char* src) : m_lexer(src), m_pos(0), m_failed(false) { }
GoASTStmt*
GoParser::Statement() {
Rule r("Statement", this);
GoLexer::TokenType t = peek();
GoASTStmt* ret = nullptr;
switch (t)
{
case GoLexer::TOK_EOF:
case GoLexer::OP_SEMICOLON:
case GoLexer::OP_RPAREN:
case GoLexer::OP_RBRACE:
case GoLexer::TOK_INVALID:
return EmptyStmt();
case GoLexer::OP_LBRACE:
return Block();
/* TODO:
case GoLexer::KEYWORD_GO:
return GoStmt();
case GoLexer::KEYWORD_RETURN:
return ReturnStmt();
case GoLexer::KEYWORD_BREAK:
case GoLexer::KEYWORD_CONTINUE:
case GoLexer::KEYWORD_GOTO:
case GoLexer::KEYWORD_FALLTHROUGH:
return BranchStmt();
case GoLexer::KEYWORD_IF:
return IfStmt();
case GoLexer::KEYWORD_SWITCH:
return SwitchStmt();
case GoLexer::KEYWORD_SELECT:
return SelectStmt();
case GoLexer::KEYWORD_FOR:
return ForStmt();
case GoLexer::KEYWORD_DEFER:
return DeferStmt();
case GoLexer::KEYWORD_CONST:
case GoLexer::KEYWORD_TYPE:
case GoLexer::KEYWORD_VAR:
return DeclStmt();
case GoLexer::TOK_IDENTIFIER:
if ((ret = LabeledStmt()) ||
(ret = ShortVarDecl()))
{
return ret;
}
*/
default:
break;
}
GoASTExpr* expr = Expression();
if (expr == nullptr)
return r.error();
if (/*(ret = SendStmt(expr)) ||*/
(ret = IncDecStmt(expr)) ||
(ret = Assignment(expr)) ||
(ret = ExpressionStmt(expr)))
{
return ret;
}
delete expr;
return r.error();
}
GoASTStmt*
GoParser::ExpressionStmt(GoASTExpr *e)
{
if (Semicolon())
return new GoASTExprStmt(e);
return nullptr;
}
GoASTStmt*
GoParser::IncDecStmt(GoASTExpr *e)
{
Rule r("IncDecStmt", this);
if (match(GoLexer::OP_PLUS_PLUS))
return Semicolon() ? new GoASTIncDecStmt(e, GoLexer::OP_PLUS_PLUS) : r.error();
if (match(GoLexer::OP_MINUS_MINUS))
return Semicolon() ? new GoASTIncDecStmt(e, GoLexer::OP_MINUS_MINUS) : r.error();
return nullptr;
}
GoASTStmt*
GoParser::Assignment(lldb_private::GoASTExpr *e)
{
Rule r("Assignment", this);
std::vector<std::unique_ptr<GoASTExpr> > lhs;
for (GoASTExpr* l = MoreExpressionList(); l; l = MoreExpressionList())
lhs.push_back(std::unique_ptr<GoASTExpr>(l));
switch (peek())
{
case GoLexer::OP_EQ:
case GoLexer::OP_PLUS_EQ:
case GoLexer::OP_MINUS_EQ:
case GoLexer::OP_PIPE_EQ:
case GoLexer::OP_CARET_EQ:
case GoLexer::OP_STAR_EQ:
case GoLexer::OP_SLASH_EQ:
case GoLexer::OP_PERCENT_EQ:
case GoLexer::OP_LSHIFT_EQ:
case GoLexer::OP_RSHIFT_EQ:
case GoLexer::OP_AMP_EQ:
case GoLexer::OP_AMP_CARET_EQ:
break;
default:
return r.error();
}
// We don't want to own e until we know this is an assignment.
std::unique_ptr<GoASTAssignStmt> stmt(new GoASTAssignStmt(false));
stmt->AddLhs(e);
for (auto& l : lhs)
stmt->AddLhs(l.release());
for (GoASTExpr* r = Expression(); r; r = MoreExpressionList())
stmt->AddRhs(r);
if (!Semicolon() || stmt->NumRhs() == 0)
return new GoASTBadStmt;
return stmt.release();
}
GoASTStmt*
GoParser::EmptyStmt() {
if (match(GoLexer::TOK_EOF))
return nullptr;
if (Semicolon())
return new GoASTEmptyStmt;
return nullptr;
}
GoASTStmt*
GoParser::GoStmt() {
if (match(GoLexer::KEYWORD_GO)) {
if (GoASTCallExpr* e = llvm::dyn_cast_or_null<GoASTCallExpr>(Expression())) {
return FinishStmt(new GoASTGoStmt(e));
}
m_last = "call expression";
m_failed = true;
return new GoASTBadStmt();
}
return nullptr;
}
GoASTStmt*
GoParser::ReturnStmt() {
if (match(GoLexer::KEYWORD_RETURN))
{
std::unique_ptr<GoASTReturnStmt> r(new GoASTReturnStmt());
for (GoASTExpr* e = Expression(); e; e = MoreExpressionList())
r->AddResults(e);
return FinishStmt(r.release());
}
return nullptr;
}
GoASTStmt*
GoParser::BranchStmt() {
GoLexer::Token* tok;
if ((tok = match(GoLexer::KEYWORD_BREAK)) ||
(tok = match(GoLexer::KEYWORD_CONTINUE)) ||
(tok = match(GoLexer::KEYWORD_GOTO)))
{
auto* e = Identifier();
if (tok->m_type == GoLexer::KEYWORD_GOTO && !e)
return syntaxerror();
return FinishStmt(new GoASTBranchStmt(e, tok->m_type));
}
if ((tok = match(GoLexer::KEYWORD_FALLTHROUGH)))
return FinishStmt(new GoASTBranchStmt(nullptr, tok->m_type));
return nullptr;
}
GoASTIdent*
GoParser::Identifier()
{
if (auto* tok = match(GoLexer::TOK_IDENTIFIER))
return new GoASTIdent(*tok);
return nullptr;
}
GoASTExpr*
GoParser::MoreExpressionList()
{
if (match(GoLexer::OP_COMMA)) {
auto* e = Expression();
if (!e)
return syntaxerror();
return e;
}
return nullptr;
}
GoASTIdent*
GoParser::MoreIdentifierList()
{
if (match(GoLexer::OP_COMMA)) {
auto* i = Identifier();
if (!i)
return syntaxerror();
return i;
}
return nullptr;
}
GoASTExpr*
GoParser::Expression()
{
Rule r("Expression", this);
if (GoASTExpr* ret = OrExpr())
return ret;
return r.error();
}
GoASTExpr*
GoParser::UnaryExpr()
{
switch (peek())
{
case GoLexer::OP_PLUS:
case GoLexer::OP_MINUS:
case GoLexer::OP_BANG:
case GoLexer::OP_CARET:
case GoLexer::OP_STAR:
case GoLexer::OP_AMP:
case GoLexer::OP_LT_MINUS:
{
const GoLexer::Token t = next();
if (GoASTExpr* e = UnaryExpr())
{
if (t.m_type == GoLexer::OP_STAR)
return new GoASTStarExpr(e);
else
return new GoASTUnaryExpr(t.m_type, e);
}
return syntaxerror();
}
default:
return PrimaryExpr();
}
}
GoASTExpr*
GoParser::OrExpr()
{
std::unique_ptr<GoASTExpr> l(AndExpr());
if (l)
{
while (match(GoLexer::OP_PIPE_PIPE)) {
GoASTExpr* r = AndExpr();
if (r)
l.reset(new GoASTBinaryExpr(l.release(), r, GoLexer::OP_PIPE_PIPE));
else
return syntaxerror();
}
return l.release();
}
return nullptr;
}
GoASTExpr*
GoParser::AndExpr()
{
std::unique_ptr<GoASTExpr> l(RelExpr());
if (l)
{
while (match(GoLexer::OP_AMP_AMP)) {
GoASTExpr* r = RelExpr();
if (r)
l.reset(new GoASTBinaryExpr(l.release(), r, GoLexer::OP_AMP_AMP));
else
return syntaxerror();
}
return l.release();
}
return nullptr;
}
GoASTExpr*
GoParser::RelExpr()
{
std::unique_ptr<GoASTExpr> l(AddExpr());
if (l)
{
for (GoLexer::Token* t;
(t = match(GoLexer::OP_EQ_EQ)) ||
(t = match(GoLexer::OP_BANG_EQ)) ||
(t = match(GoLexer::OP_LT)) ||
(t = match(GoLexer::OP_LT_EQ)) ||
(t = match(GoLexer::OP_GT)) ||
(t = match(GoLexer::OP_GT_EQ));)
{
GoLexer::TokenType op = t->m_type;
GoASTExpr* r = AddExpr();
if (r)
l.reset(new GoASTBinaryExpr(l.release(), r, op));
else
return syntaxerror();
}
return l.release();
}
return nullptr;
}
GoASTExpr*
GoParser::AddExpr()
{
std::unique_ptr<GoASTExpr> l(MulExpr());
if (l)
{
for (GoLexer::Token* t;
(t = match(GoLexer::OP_PLUS)) ||
(t = match(GoLexer::OP_MINUS)) ||
(t = match(GoLexer::OP_PIPE)) ||
(t = match(GoLexer::OP_CARET));)
{
GoLexer::TokenType op = t->m_type;
GoASTExpr* r = MulExpr();
if (r)
l.reset(new GoASTBinaryExpr(l.release(), r, op));
else
return syntaxerror();
}
return l.release();
}
return nullptr;
}
GoASTExpr*
GoParser::MulExpr()
{
std::unique_ptr<GoASTExpr> l(UnaryExpr());
if (l)
{
for (GoLexer::Token* t;
(t = match(GoLexer::OP_STAR)) ||
(t = match(GoLexer::OP_SLASH)) ||
(t = match(GoLexer::OP_PERCENT)) ||
(t = match(GoLexer::OP_LSHIFT)) ||
(t = match(GoLexer::OP_RSHIFT)) ||
(t = match(GoLexer::OP_AMP)) ||
(t = match(GoLexer::OP_AMP_CARET));)
{
GoLexer::TokenType op = t->m_type;
GoASTExpr* r = UnaryExpr();
if (r)
l.reset(new GoASTBinaryExpr(l.release(), r, op));
else
return syntaxerror();
}
return l.release();
}
return nullptr;
}
GoASTExpr*
GoParser::PrimaryExpr()
{
GoASTExpr* l;
GoASTExpr* r;
(l = Conversion()) || (l = Operand());
if (!l)
return nullptr;
while ((r = Selector(l)) ||
(r = IndexOrSlice(l)) ||
(r = TypeAssertion(l)) ||
(r = Arguments(l)))
{
l = r;
}
return l;
}
GoASTExpr*
GoParser::Operand()
{
GoLexer::Token* lit;
if ((lit = match(GoLexer::LIT_INTEGER)) ||
(lit = match(GoLexer::LIT_FLOAT)) ||
(lit = match(GoLexer::LIT_IMAGINARY)) ||
(lit = match(GoLexer::LIT_RUNE)) ||
(lit = match(GoLexer::LIT_STRING)))
return new GoASTBasicLit(*lit);
if (match(GoLexer::OP_LPAREN))
{
GoASTExpr* e;
if (!((e = Expression()) && match(GoLexer::OP_RPAREN)))
return syntaxerror();
return e;
}
// MethodExpr should be handled by Selector
if (GoASTExpr* e = CompositeLit())
return e;
if (GoASTExpr* n = Name())
return n;
return FunctionLit();
}
GoASTExpr*
GoParser::FunctionLit()
{
if (!match(GoLexer::KEYWORD_FUNC))
return nullptr;
auto* sig = Signature();
if (!sig)
return syntaxerror();
auto* body = Block();
if (!body)
{
delete sig;
return syntaxerror();
}
return new GoASTFuncLit(sig, body);
}
GoASTBlockStmt*
GoParser::Block()
{
if (!match(GoLexer::OP_LBRACE))
return nullptr;
std::unique_ptr<GoASTBlockStmt> block(new GoASTBlockStmt);
for (auto *s = Statement(); s; s = Statement())
block->AddList(s);
if (!match(GoLexer::OP_RBRACE))
return syntaxerror();
return block.release();
}
GoASTExpr*
GoParser::CompositeLit()
{
Rule r("CompositeLit", this);
GoASTExpr* type;
(type = StructType()) || (type = ArrayOrSliceType(true)) || (type = MapType()) || (type = Name());
if (!type)
return r.error();
GoASTCompositeLit* lit = LiteralValue();
if (!lit)
return r.error();
lit->SetType(type);
return lit;
}
GoASTCompositeLit*
GoParser::LiteralValue()
{
if (!match(GoLexer::OP_LBRACE))
return nullptr;
std::unique_ptr<GoASTCompositeLit> lit(new GoASTCompositeLit);
for (GoASTExpr* e = Element(); e ; e = Element())
{
lit->AddElts(e);
if (!match(GoLexer::OP_COMMA))
break;
}
if (!mustMatch(GoLexer::OP_RBRACE))
return nullptr;
return lit.release();
}
GoASTExpr*
GoParser::Element()
{
GoASTExpr* key;
if (!((key = Expression()) ||
(key = LiteralValue())))
return nullptr;
if (!match(GoLexer::OP_COLON))
return key;
GoASTExpr* value;
if ((value = Expression()) || (value = LiteralValue()))
return new GoASTKeyValueExpr(key, value);
delete key;
return syntaxerror();
}
GoASTExpr*
GoParser::Selector(GoASTExpr *e)
{
Rule r("Selector", this);
if (match(GoLexer::OP_DOT)) {
if (auto* name = Identifier())
return new GoASTSelectorExpr(e, name);
}
return r.error();
}
GoASTExpr*
GoParser::IndexOrSlice(GoASTExpr *e)
{
Rule r("IndexOrSlice", this);
if (match(GoLexer::OP_LBRACK)) {
std::unique_ptr<GoASTExpr> i1(Expression()), i2, i3;
bool slice = false;
if (match(GoLexer::OP_COLON))
{
slice = true;
i2.reset(Expression());
if (i2 && match(GoLexer::OP_COLON))
{
i3.reset(Expression());
if (!i3)
return syntaxerror();
}
}
if (!(slice || i1))
return syntaxerror();
if (!mustMatch(GoLexer::OP_RBRACK))
return nullptr;
if (slice)
{
bool slice3 = i3.get();
return new GoASTSliceExpr(e, i1.release(), i2.release(), i3.release(), slice3);
}
return new GoASTIndexExpr(e, i1.release());
}
return r.error();
}
GoASTExpr*
GoParser::TypeAssertion(GoASTExpr *e)
{
Rule r("TypeAssertion", this);
if (match(GoLexer::OP_DOT) && match(GoLexer::OP_LPAREN)) {
if (auto* t = Type())
{
if (!mustMatch(GoLexer::OP_RPAREN))
return nullptr;
return new GoASTTypeAssertExpr(e, t);
}
return syntaxerror();
}
return r.error();
}
GoASTExpr*
GoParser::Arguments(GoASTExpr *e)
{
if (match(GoLexer::OP_LPAREN)) {
std::unique_ptr<GoASTCallExpr> call(new GoASTCallExpr(false));
GoASTExpr* arg;
// ( ExpressionList | Type [ "," ExpressionList ] )
for ((arg = Expression()) || (arg = Type()); arg; arg = MoreExpressionList())
{
call->AddArgs(arg);
}
if (match(GoLexer::OP_DOTS))
call->SetEllipsis(true);
// Eat trailing comma
match(GoLexer::OP_COMMA);
if (!mustMatch(GoLexer::OP_RPAREN))
return nullptr;
call->SetFun(e);
return call.release();
}
return nullptr;
}
GoASTExpr*
GoParser::Conversion()
{
Rule r("Conversion", this);
if (GoASTExpr* t = Type2())
{
if (match(GoLexer::OP_LPAREN))
{
GoASTExpr* v = Expression();
if (!v)
return syntaxerror();
match(GoLexer::OP_COMMA);
if (!mustMatch(GoLexer::OP_RPAREN))
return r.error();
GoASTCallExpr* call = new GoASTCallExpr(false);
call->SetFun(t);
call->AddArgs(v);
return call;
}
}
return r.error();
}
GoASTExpr*
GoParser::Type2()
{
switch (peek())
{
case GoLexer::OP_LBRACK:
return ArrayOrSliceType(false);
case GoLexer::KEYWORD_STRUCT:
return StructType();
case GoLexer::KEYWORD_FUNC:
return FunctionType();
case GoLexer::KEYWORD_INTERFACE:
return InterfaceType();
case GoLexer::KEYWORD_MAP:
return MapType();
case GoLexer::KEYWORD_CHAN:
return ChanType2();
default:
return nullptr;
}
}
GoASTExpr*
GoParser::ArrayOrSliceType(bool allowEllipsis)
{
Rule r("ArrayType", this);
if (match(GoLexer::OP_LBRACK))
{
std::unique_ptr<GoASTExpr> len;
if (allowEllipsis && match(GoLexer::OP_DOTS))
{
len.reset(new GoASTEllipsis(nullptr));
} else {
len.reset(Expression());
}
if (!match(GoLexer::OP_RBRACK))
return r.error();
GoASTExpr* elem = Type();
if (!elem)
return syntaxerror();
return new GoASTArrayType(len.release(), elem);
}
return r.error();
}
GoASTExpr*
GoParser::StructType()
{
if (!(match(GoLexer::KEYWORD_STRUCT) && mustMatch(GoLexer::OP_LBRACE)))
return nullptr;
std::unique_ptr<GoASTFieldList> fields(new GoASTFieldList);
while (auto* field = FieldDecl())
fields->AddList(field);
if (!mustMatch(GoLexer::OP_RBRACE))
return nullptr;
return new GoASTStructType(fields.release());
}
GoASTField*
GoParser::FieldDecl()
{
std::unique_ptr<GoASTField> f(new GoASTField);
GoASTExpr* t = FieldNamesAndType(f.get());
if (!t)
t = AnonymousFieldType();
if (!t)
return nullptr;
if (auto* tok = match(GoLexer::LIT_STRING))
f->SetTag(new GoASTBasicLit(*tok));
if (!Semicolon())
return syntaxerror();
return f.release();
}
GoASTExpr*
GoParser::FieldNamesAndType(GoASTField* field)
{
Rule r("FieldNames", this);
for (auto* id = Identifier(); id; id = MoreIdentifierList())
field->AddNames(id);
if (m_failed)
return nullptr;
GoASTExpr* t = Type();
if (t)
return t;
return r.error();
}
GoASTExpr*
GoParser::AnonymousFieldType()
{
bool pointer = match(GoLexer::OP_STAR);
GoASTExpr* t = Type();
if (!t)
return nullptr;
if (pointer)
return new GoASTStarExpr(t);
return t;
}
GoASTExpr*
GoParser::FunctionType()
{
if (!match(GoLexer::KEYWORD_FUNC))
return nullptr;
return Signature();
}
GoASTFuncType*
GoParser::Signature()
{
auto* params = Params();
if (!params)
return syntaxerror();
auto* result = Params();
if (!result)
{
if (auto* t = Type())
{
result = new GoASTFieldList;
auto* f = new GoASTField;
f->SetType(t);
result->AddList(f);
}
}
return new GoASTFuncType(params, result);
}
GoASTFieldList*
GoParser::Params()
{
if (!match(GoLexer::OP_LPAREN))
return nullptr;
std::unique_ptr<GoASTFieldList> l(new GoASTFieldList);
while (GoASTField* p = ParamDecl())
{
l->AddList(p);
if (!match(GoLexer::OP_COMMA))
break;
}
if (!mustMatch(GoLexer::OP_RPAREN))
return nullptr;
return l.release();
}
GoASTField*
GoParser::ParamDecl()
{
std::unique_ptr<GoASTField> field(new GoASTField);
GoASTIdent* id = Identifier();
if (id)
{
// Try `IdentifierList [ "..." ] Type`.
// If that fails, backtrack and try `[ "..." ] Type`.
Rule r("NamedParam", this);
for (; id; id = MoreIdentifierList())
field->AddNames(id);
GoASTExpr* t = ParamType();
if (t)
{
field->SetType(t);
return field.release();
}
field.reset(new GoASTField);
r.error();
}
GoASTExpr* t = ParamType();
if (t)
{
field->SetType(t);
return field.release();
}
return nullptr;
}
GoASTExpr*
GoParser::ParamType()
{
bool dots = match(GoLexer::OP_DOTS);
GoASTExpr* t = Type();
if (!dots)
return t;
if (!t)
return syntaxerror();
return new GoASTEllipsis(t);
}
GoASTExpr*
GoParser::InterfaceType()
{
if (!match(GoLexer::KEYWORD_INTERFACE) || !mustMatch(GoLexer::OP_LBRACE))
return nullptr;
std::unique_ptr<GoASTFieldList> methods(new GoASTFieldList);
while (true)
{
Rule r("MethodSpec", this);
// ( identifier Signature | TypeName ) ;
std::unique_ptr<GoASTIdent> id(Identifier());
if (!id)
break;
GoASTExpr* type = Signature();
if (!type)
{
r.error();
id.reset();
type = Name();
}
if (!Semicolon())
return syntaxerror();
auto* f = new GoASTField;
if (id)
f->AddNames(id.release());
f->SetType(type);
methods->AddList(f);
}
if (!mustMatch(GoLexer::OP_RBRACE))
return nullptr;
return new GoASTInterfaceType(methods.release());
}
GoASTExpr*
GoParser::MapType()
{
if (!(match(GoLexer::KEYWORD_MAP) && mustMatch(GoLexer::OP_LBRACK)))
return nullptr;
std::unique_ptr<GoASTExpr> key(Type());
if (!key)
return syntaxerror();
if (!mustMatch(GoLexer::OP_RBRACK))
return nullptr;
auto* elem = Type();
if (!elem)
return syntaxerror();
return new GoASTMapType(key.release(), elem);
}
GoASTExpr*
GoParser::ChanType()
{
Rule r("chan", this);
if (match(GoLexer::OP_LT_MINUS))
{
if (match(GoLexer::KEYWORD_CHAN))
{
auto* elem = Type();
if (!elem)
return syntaxerror();
return new GoASTChanType(GoASTNode::eChanRecv, elem);
}
return r.error();
}
return ChanType2();
}
GoASTExpr*
GoParser::ChanType2()
{
if (!match(GoLexer::KEYWORD_CHAN))
return nullptr;
auto dir = GoASTNode::eChanBidir;
if (match(GoLexer::OP_LT_MINUS))
dir = GoASTNode::eChanSend;
auto* elem = Type();
if (!elem)
return syntaxerror();
return new GoASTChanType(dir, elem);
}
GoASTExpr*
GoParser::Type()
{
if (GoASTExpr* t = Type2())
return t;
if (GoASTExpr* t = Name())
return t;
if (GoASTExpr* t = ChanType())
return t;
if (match(GoLexer::OP_STAR))
{
GoASTExpr* t = Type();
if (!t)
return syntaxerror();
return new GoASTStarExpr(t);
}
if (match(GoLexer::OP_LPAREN))
{
std::unique_ptr<GoASTExpr> t(Type());
if (!t || !match(GoLexer::OP_RPAREN))
return syntaxerror();
return t.release();
}
return nullptr;
}
bool
GoParser::Semicolon()
{
if (match(GoLexer::OP_SEMICOLON))
return true;
switch (peek())
{
case GoLexer::OP_RPAREN:
case GoLexer::OP_RBRACE:
case GoLexer::TOK_EOF:
return true;
default:
return false;
}
}
GoASTExpr*
GoParser::Name()
{
if (auto* id = Identifier())
{
if (GoASTExpr* qual = QualifiedIdent(id))
return qual;
return id;
}
return nullptr;
}
GoASTExpr*
GoParser::QualifiedIdent(lldb_private::GoASTIdent *p)
{
Rule r("QualifiedIdent", this);
llvm::SmallString<32> path(p->GetName().m_value);
GoLexer::Token* next;
bool have_slashes = false;
// LLDB extension: support full/package/path.name
while (match(GoLexer::OP_SLASH) && (next = match(GoLexer::TOK_IDENTIFIER)))
{
have_slashes = true;
path.append("/");
path.append(next->m_value);
}
if (match(GoLexer::OP_DOT))
{
auto* name = Identifier();
if (name)
{
if (have_slashes)
{
p->SetName(GoLexer::Token(GoLexer::TOK_IDENTIFIER, CopyString(path)));
}
return new GoASTSelectorExpr(p, name);
}
}
return r.error();
}
llvm::StringRef
GoParser::CopyString(llvm::StringRef s)
{
return m_strings.insert(std::make_pair(s, 'x')).first->getKey();
}
void
GoParser::GetError(Error &error)
{
llvm::StringRef want;
if (m_failed)
want = m_last_tok == GoLexer::TOK_INVALID ? DescribeToken(m_last_tok) : m_last;
else
want = m_error;
size_t len = m_lexer.BytesRemaining();
if (len > 10)
len = 10;
llvm::StringRef got;
if (len == 0)
got = "<eof>";
else
got = m_lexer.GetString(len);
error.SetErrorStringWithFormat("Syntax error: expected %s before '%s'.", want.str().c_str(), got.str().c_str());
}

source/Plugins/ExpressionParser/Go/GoUserExpression.h

  • This file was added.
//===-- GoUserExpression.h -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_GoUserExpression_h_
#define liblldb_GoUserExpression_h_
// C Includes
// C++ Includes
#include <string>
#include <map>
#include <vector>
// Other libraries and framework includes
// Project includes
#include "lldb/lldb-forward.h"
#include "lldb/lldb-private.h"
#include "lldb/Expression/UserExpression.h"
#include "lldb/Expression/ExpressionVariable.h"
#include "lldb/Target/ExecutionContext.h"
namespace lldb_private
{
class GoParser;
class GoPersistentExpressionState : public PersistentExpressionState
{
public:
GoPersistentExpressionState();
ConstString
GetNextPersistentVariableName () override;
void
RemovePersistentVariable (lldb::ExpressionVariableSP variable) override;
lldb::addr_t
LookupSymbol (const ConstString &name) override { return LLDB_INVALID_ADDRESS; }
static bool classof(const PersistentExpressionState *pv)
{
return pv->getKind() == PersistentExpressionState::eKindGo;
}
private:
uint32_t m_next_persistent_variable_id; ///< The counter used by GetNextResultName().
};
//----------------------------------------------------------------------
/// @class GoUserExpression GoUserExpression.h "lldb/Expression/GoUserExpression.h"
/// @brief Encapsulates a single expression for use with Go
///
/// LLDB uses expressions for various purposes, notably to call functions
/// and as a backend for the expr command. GoUserExpression encapsulates
/// the objects needed to parse and interpret an expression.
//----------------------------------------------------------------------
class GoUserExpression : public UserExpression
{
public:
GoUserExpression(ExecutionContextScope &exe_scope, const char *expr, const char *expr_prefix,
lldb::LanguageType language, ResultType desired_type);
virtual bool Parse(Stream &error_stream, ExecutionContext &exe_ctx, lldb_private::ExecutionPolicy execution_policy,
bool keep_result_in_memory, bool generate_debug_info) override;
virtual lldb::ExpressionResults Execute(Stream &error_stream, ExecutionContext &exe_ctx,
const EvaluateExpressionOptions &options,
lldb::UserExpressionSP &shared_ptr_to_me,
lldb::ExpressionVariableSP &result) override;
bool
CanInterpret() override
{
return true;
}
bool
FinalizeJITExecution(Stream &error_stream, ExecutionContext &exe_ctx, lldb::ExpressionVariableSP &result,
lldb::addr_t function_stack_bottom = LLDB_INVALID_ADDRESS,
lldb::addr_t function_stack_top = LLDB_INVALID_ADDRESS) override
{
return true;
}
private:
class GoInterpreter;
std::unique_ptr<GoInterpreter> m_interpreter;
};
} // namespace lldb_private
#endif // liblldb_GoUserExpression_h_

source/Plugins/ExpressionParser/Go/GoUserExpression.cpp

  • This file was added.
//===-- GoUserExpression.cpp ---------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <stdio.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include <cstdlib>
#include <string>
#include <map>
#include <vector>
#include "GoUserExpression.h"
#include "lldb/lldb-private.h"
#include "lldb/Core/ConstString.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/DataEncoder.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Core/ValueObjectRegister.h"
#include "lldb/Expression/ExpressionVariable.h"
#include "lldb/Symbol/TypeList.h"
#include "lldb/Symbol/GoASTContext.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/ThreadPlan.h"
#include "lldb/Target/ThreadPlanCallUserExpression.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringMap.h"
#include "Plugins/ExpressionParser/Go/GoAST.h"
#include "Plugins/ExpressionParser/Go/GoParser.h"
using namespace lldb_private;
using namespace lldb;
class GoUserExpression::GoInterpreter
{
public:
GoInterpreter(ExecutionContext& exe_ctx, const char *expr)
: m_exe_ctx(exe_ctx)
, m_frame(exe_ctx.GetFrameSP())
, m_parser(expr)
{
if (m_frame)
{
const SymbolContext& ctx = m_frame->GetSymbolContext(eSymbolContextFunction);
ConstString fname = ctx.GetFunctionName();
if (fname.GetLength() > 0)
{
size_t dot = fname.GetStringRef().find('.');
if (dot != llvm::StringRef::npos)
m_package = llvm::StringRef(fname.AsCString(), dot);
}
}
}
void
set_use_dynamic(DynamicValueType use_dynamic)
{
m_use_dynamic = use_dynamic;
}
bool Parse();
lldb::ValueObjectSP Evaluate(ExecutionContext& exe_ctx);
lldb::ValueObjectSP EvaluateStatement(const GoASTStmt* s);
lldb::ValueObjectSP EvaluateExpr(const GoASTExpr* e);
ValueObjectSP VisitBadExpr(const GoASTBadExpr* e)
{
m_parser.GetError(m_error);
return nullptr;
}
ValueObjectSP VisitParenExpr(const GoASTParenExpr* e);
ValueObjectSP VisitIdent(const GoASTIdent* e);
ValueObjectSP VisitStarExpr(const GoASTStarExpr* e);
ValueObjectSP VisitSelectorExpr(const GoASTSelectorExpr* e);
ValueObjectSP VisitBasicLit(const GoASTBasicLit* e);
ValueObjectSP VisitIndexExpr(const GoASTIndexExpr* e);
ValueObjectSP VisitUnaryExpr(const GoASTUnaryExpr* e);
ValueObjectSP VisitCallExpr(const GoASTCallExpr* e);
ValueObjectSP VisitTypeAssertExpr(const GoASTTypeAssertExpr* e) { return NotImplemented(e); }
ValueObjectSP VisitBinaryExpr(const GoASTBinaryExpr* e) { return NotImplemented(e); }
ValueObjectSP VisitArrayType(const GoASTArrayType* e) { return NotImplemented(e); }
ValueObjectSP VisitChanType(const GoASTChanType* e) { return NotImplemented(e); }
ValueObjectSP VisitCompositeLit(const GoASTCompositeLit* e) { return NotImplemented(e); }
ValueObjectSP VisitEllipsis(const GoASTEllipsis* e) { return NotImplemented(e); }
ValueObjectSP VisitFuncType(const GoASTFuncType* e) { return NotImplemented(e); }
ValueObjectSP VisitFuncLit(const GoASTFuncLit* e) { return NotImplemented(e); }
ValueObjectSP VisitInterfaceType(const GoASTInterfaceType* e) { return NotImplemented(e); }
ValueObjectSP VisitKeyValueExpr(const GoASTKeyValueExpr* e) { return NotImplemented(e); }
ValueObjectSP VisitMapType(const GoASTMapType* e) { return NotImplemented(e); }
ValueObjectSP VisitSliceExpr(const GoASTSliceExpr* e) { return NotImplemented(e); }
ValueObjectSP VisitStructType(const GoASTStructType* e) { return NotImplemented(e); }
CompilerType EvaluateType(const GoASTExpr* e);
Error &
error()
{
return m_error;
}
private:
std::nullptr_t NotImplemented(const GoASTExpr* e)
{
m_error.SetErrorStringWithFormat("%s node not implemented", e->GetKindName());
return nullptr;
}
ExecutionContext m_exe_ctx;
lldb::StackFrameSP m_frame;
GoParser m_parser;
DynamicValueType m_use_dynamic;
Error m_error;
llvm::StringRef m_package;
std::vector<std::unique_ptr<GoASTStmt>> m_statements;
};
VariableSP
FindGlobalVariable(TargetSP target, llvm::Twine name)
{
ConstString fullname(name.str());
VariableList variable_list;
const bool append = true;
if (!target) {
return nullptr;
}
const uint32_t match_count = target->GetImages().FindGlobalVariables (fullname,
append,
1,
variable_list);
if (match_count == 1)
{
return variable_list.GetVariableAtIndex(0);
}
return nullptr;
}
CompilerType LookupType(TargetSP target, ConstString name)
{
if (!target)
return CompilerType();
SymbolContext sc;
TypeList type_list;
uint32_t num_matches = target->GetImages().FindTypes (sc,
name,
false,
2,
type_list);
if (num_matches > 0) {
return type_list.GetTypeAtIndex(0)->GetFullCompilerType();
}
return CompilerType();
}
GoUserExpression::GoUserExpression(ExecutionContextScope &exe_scope, const char *expr, const char *expr_prefix,
lldb::LanguageType language, ResultType desired_type)
: UserExpression(exe_scope, expr, expr_prefix, language, desired_type)
{
}
bool
GoUserExpression::Parse(Stream &error_stream, ExecutionContext &exe_ctx, lldb_private::ExecutionPolicy execution_policy,
bool keep_result_in_memory, bool generate_debug_info)
{
InstallContext(exe_ctx);
m_interpreter.reset(new GoInterpreter(exe_ctx, GetUserText()));
if (m_interpreter->Parse())
return true;
const char *error_cstr = m_interpreter->error().AsCString();
if (error_cstr && error_cstr[0])
error_stream.Printf("error: %s\n", error_cstr);
else
error_stream.Printf("error: expression can't be interpreted or run\n");
return false;
}
lldb::ExpressionResults
GoUserExpression::Execute(Stream &error_stream, ExecutionContext &exe_ctx, const EvaluateExpressionOptions &options,
lldb::UserExpressionSP &shared_ptr_to_me, lldb::ExpressionVariableSP &result)
{
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_EXPRESSIONS | LIBLLDB_LOG_STEP));
lldb_private::ExecutionPolicy execution_policy = options.GetExecutionPolicy();
lldb::ExpressionResults execution_results = lldb::eExpressionSetupError;
Process *process = exe_ctx.GetProcessPtr();
Target *target = exe_ctx.GetTargetPtr();
if (target == nullptr || process == nullptr || process->GetState() != lldb::eStateStopped)
{
if (execution_policy == eExecutionPolicyAlways)
{
if (log)
log->Printf("== [GoUserExpression::Evaluate] Expression may not run, but is not constant ==");
error_stream.Printf("expression needed to run but couldn't");
return execution_results;
}
}
m_interpreter->set_use_dynamic(options.GetUseDynamic());
ValueObjectSP result_val_sp = m_interpreter->Evaluate(exe_ctx);
Error err = m_interpreter->error();
m_interpreter.reset();
if (!result_val_sp)
{
const char *error_cstr = err.AsCString();
if (error_cstr && error_cstr[0])
error_stream.Printf("error: %s\n", error_cstr);
else
error_stream.Printf("error: expression can't be interpreted or run\n");
return lldb::eExpressionDiscarded;
}
result.reset(new ExpressionVariable(ExpressionVariable::eKindGo));
result->m_live_sp = result->m_frozen_sp = result_val_sp;
result->m_flags |= ExpressionVariable::EVIsProgramReference;
PersistentExpressionState* pv = target->GetPersistentExpressionStateForLanguage(eLanguageTypeGo);
if (pv != nullptr)
{
result->SetName(pv->GetNextPersistentVariableName());
pv->AddVariable(result);
}
return lldb::eExpressionCompleted;
}
bool
GoUserExpression::GoInterpreter::Parse()
{
for (std::unique_ptr<GoASTStmt> stmt(m_parser.Statement()); stmt; stmt.reset(m_parser.Statement()))
{
if (m_parser.Failed())
break;
m_statements.emplace_back(std::move(stmt));
}
if (m_parser.Failed() || !m_parser.AtEOF())
m_parser.GetError(m_error);
return m_error.Success();
}
ValueObjectSP
GoUserExpression::GoInterpreter::Evaluate(ExecutionContext& exe_ctx)
{
m_exe_ctx = exe_ctx;
ValueObjectSP result;
for (const std::unique_ptr<GoASTStmt> &stmt : m_statements)
{
result = EvaluateStatement(stmt.get());
if (m_error.Fail())
return nullptr;
}
return result;
}
ValueObjectSP
GoUserExpression::GoInterpreter::EvaluateStatement(const lldb_private::GoASTStmt *stmt)
{
ValueObjectSP result;
switch (stmt->GetKind())
{
case GoASTNode::eBlockStmt:
{
const GoASTBlockStmt* block = llvm::cast<GoASTBlockStmt>(stmt);
for (size_t i = 0; i < block->NumList(); ++i)
result = EvaluateStatement(block->GetList(i));
break;
}
case GoASTNode::eBadStmt:
m_parser.GetError(m_error);
break;
case GoASTNode::eExprStmt:
{
const GoASTExprStmt* expr = llvm::cast<GoASTExprStmt>(stmt);
return EvaluateExpr(expr->GetX());
}
default:
m_error.SetErrorStringWithFormat("%s node not supported", stmt->GetKindName());
}
return result;
}
ValueObjectSP
GoUserExpression::GoInterpreter::EvaluateExpr(const lldb_private::GoASTExpr *e)
{
if (e)
return e->Visit<ValueObjectSP>(this);
return ValueObjectSP();
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitParenExpr(const lldb_private::GoASTParenExpr *e)
{
return EvaluateExpr(e->GetX());
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitIdent(const GoASTIdent *e)
{
ValueObjectSP val;
if (m_frame)
{
VariableSP var_sp;
std::string varname = e->GetName().m_value.str();
if (varname.size() > 1 && varname[0] == '$')
{
RegisterContextSP reg_ctx_sp = m_frame->GetRegisterContext();
const RegisterInfo* reg = reg_ctx_sp->GetRegisterInfoByName(varname.c_str() + 1);
if (reg)
{
std::string type;
switch (reg->encoding)
{
case lldb::eEncodingSint:
type.append("int");
break;
case lldb::eEncodingUint:
type.append("uint");
break;
case lldb::eEncodingIEEE754:
type.append("float");
break;
default:
m_error.SetErrorString("Invaild register encoding");
return nullptr;
}
switch (reg->byte_size)
{
case 8:
type.append("64");
break;
case 4:
type.append("32");
break;
case 2:
type.append("16");
break;
case 1:
type.append("8");
break;
default:
m_error.SetErrorString("Invaild register size");
return nullptr;
}
ValueObjectSP regVal = ValueObjectRegister::Create(m_frame.get(), reg_ctx_sp, reg->kinds[eRegisterKindLLDB]);
CompilerType goType = LookupType(m_frame->CalculateTarget(), ConstString(type));
if (regVal)
{
regVal = regVal->Cast(goType);
return regVal;
}
}
m_error.SetErrorString("Invaild register name");
return nullptr;
}
VariableListSP var_list_sp (m_frame->GetInScopeVariableList (false));
if (var_list_sp)
{
var_sp = var_list_sp->FindVariable(ConstString(varname));
if (var_sp)
val = m_frame->GetValueObjectForFrameVariable(var_sp, m_use_dynamic);
else
{
// When a variable is on the heap instead of the stack, go records a variable
// '&x' instead of 'x'.
var_sp = var_list_sp->FindVariable(ConstString("&" + varname));
if (var_sp)
{
val = m_frame->GetValueObjectForFrameVariable(var_sp, m_use_dynamic);
if (val)
val = val->Dereference(m_error);
if (m_error.Fail())
return nullptr;
}
}
}
if (!val)
{
m_error.Clear();
TargetSP target = m_frame->CalculateTarget();
if (!target) {
m_error.SetErrorString("No target");
return nullptr;
}
var_sp = FindGlobalVariable(target, m_package + "." + e->GetName().m_value);
if (var_sp)
return m_frame->TrackGlobalVariable(var_sp, m_use_dynamic);
}
}
if (!val)
m_error.SetErrorStringWithFormat("Unknown variable %s", e->GetName().m_value.str().c_str());
return val;
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitStarExpr(const GoASTStarExpr *e)
{
ValueObjectSP target = EvaluateExpr(e->GetX());
if (!target)
return nullptr;
return target->Dereference(m_error);
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitSelectorExpr(const lldb_private::GoASTSelectorExpr *e)
{
ValueObjectSP target = EvaluateExpr(e->GetX());
if (target)
{
if (target->GetCompilerType().IsPointerType())
{
target = target->Dereference(m_error);
if (m_error.Fail())
return nullptr;
}
ConstString field(e->GetSel()->GetName().m_value);
ValueObjectSP result = target->GetChildMemberWithName(field, true);
if (!result)
m_error.SetErrorStringWithFormat("Unknown child %s", field.AsCString());
return result;
}
if (const GoASTIdent* package = llvm::dyn_cast<GoASTIdent>(e->GetX())) {
if (VariableSP global = FindGlobalVariable(m_exe_ctx.GetTargetSP(),
package->GetName().m_value + "." + e->GetSel()->GetName().m_value))
{
if (m_frame) {
m_error.Clear();
return m_frame->GetValueObjectForFrameVariable(global, m_use_dynamic);
}
}
}
if (const GoASTBasicLit* packageLit = llvm::dyn_cast<GoASTBasicLit>(e->GetX())) {
if (packageLit->GetValue().m_type == GoLexer::LIT_STRING)
{
std::string value = packageLit->GetValue().m_value.str();
value = value.substr(1, value.size() - 2);
if (VariableSP global = FindGlobalVariable(m_exe_ctx.GetTargetSP(),
value + "." + e->GetSel()->GetName().m_value))
{
if (m_frame) {
m_error.Clear();
return m_frame->TrackGlobalVariable(global, m_use_dynamic);
}
}
}
}
// EvaluateExpr should have already set m_error.
return target;
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitBasicLit(const lldb_private::GoASTBasicLit *e)
{
std::string value = e->GetValue().m_value.str();
if (e->GetValue().m_type != GoLexer::LIT_INTEGER) {
m_error.SetErrorStringWithFormat("Unsupported literal %s",value.c_str());
return nullptr;
}
errno = 0;
int64_t intvalue = strtol(value.c_str(), NULL, 0);
if (errno != 0) {
m_error.SetErrorToErrno();
return nullptr;
}
DataBufferSP buf(new DataBufferHeap(sizeof(intvalue), 0));
TargetSP target = m_exe_ctx.GetTargetSP();
if (!target)
{
m_error.SetErrorString("No target");
return nullptr;
}
ByteOrder order = target->GetArchitecture().GetByteOrder();
uint8_t addr_size = target->GetArchitecture().GetAddressByteSize();
DataEncoder enc(buf, order, addr_size);
enc.PutU64(0, static_cast<uint64_t>(intvalue));
DataExtractor data(buf, order, addr_size);
CompilerType type = LookupType(target, ConstString("int64"));
return ValueObject::CreateValueObjectFromData(nullptr, data, m_exe_ctx, type);
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitIndexExpr(const lldb_private::GoASTIndexExpr *e)
{
ValueObjectSP target = EvaluateExpr(e->GetX());
if (!target)
return nullptr;
ValueObjectSP index = EvaluateExpr(e->GetIndex());
if (!index)
return nullptr;
bool is_signed;
if (!index->GetCompilerType().IsIntegerType(is_signed))
{
m_error.SetErrorString("Unsupported index");
return nullptr;
}
size_t idx;
if (is_signed)
idx = index->GetValueAsSigned(0);
else
idx = index->GetValueAsUnsigned(0);
if (GoASTContext::IsGoSlice(target->GetCompilerType()))
{
target = target->GetStaticValue();
ValueObjectSP cap = target->GetChildMemberWithName(ConstString("cap"), true);
if (cap)
{
uint64_t capval = cap->GetValueAsUnsigned(0);
if (idx >= capval)
{
m_error.SetErrorStringWithFormat("Invalid index %" PRIu64 " , cap = %" PRIu64, uint64_t(idx), capval);
return nullptr;
}
}
target = target->GetChildMemberWithName(ConstString("array"), true);
if (target && m_use_dynamic != eNoDynamicValues)
{
ValueObjectSP dynamic = target->GetDynamicValue(m_use_dynamic);
if (dynamic)
target = dynamic;
}
if (!target)
return nullptr;
return target->GetSyntheticArrayMember(idx, true);
}
return target->GetChildAtIndex(idx, true);
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitUnaryExpr(const GoASTUnaryExpr *e)
{
ValueObjectSP x = EvaluateExpr(e->GetX());
if (!x)
return nullptr;
switch (e->GetOp())
{
case GoLexer::OP_AMP:
{
CompilerType type = x->GetCompilerType().GetPointerType();
uint64_t address = x->GetAddressOf();
return ValueObject::CreateValueObjectFromAddress(nullptr, address, m_exe_ctx, type);
}
case GoLexer::OP_PLUS:
return x;
default:
m_error.SetErrorStringWithFormat("Operator %s not supported", GoLexer::LookupToken(e->GetOp()).str().c_str());
return nullptr;
}
}
CompilerType
GoUserExpression::GoInterpreter::EvaluateType(const GoASTExpr *e)
{
TargetSP target = m_exe_ctx.GetTargetSP();
if (auto* id = llvm::dyn_cast<GoASTIdent>(e))
{
CompilerType result = LookupType(target, ConstString(id->GetName().m_value));
if (result.IsValid())
return result;
std::string fullname = (m_package + "." + id->GetName().m_value).str();
result = LookupType(target, ConstString(fullname));
if (!result)
m_error.SetErrorStringWithFormat("Unknown type %s", fullname.c_str());
return result;
}
if (auto* sel = llvm::dyn_cast<GoASTSelectorExpr>(e))
{
std::string package;
if (auto* pkg_node = llvm::dyn_cast<GoASTIdent>(sel->GetX()))
{
package = pkg_node->GetName().m_value.str();
}
else if (auto* str_node = llvm::dyn_cast<GoASTBasicLit>(sel->GetX()))
{
if (str_node->GetValue().m_type == GoLexer::LIT_STRING)
{
package = str_node->GetValue().m_value.substr(1).str();
package.resize(package.length() - 1);
}
}
if (package.empty())
{
m_error.SetErrorStringWithFormat("Invalid %s in type expression", sel->GetX()->GetKindName());
return CompilerType();
}
std::string fullname = (package + "." + sel->GetSel()->GetName().m_value).str();
CompilerType result = LookupType(target, ConstString(fullname));
if (!result)
m_error.SetErrorStringWithFormat("Unknown type %s", fullname.c_str());
return result;
}
if (auto* star = llvm::dyn_cast<GoASTStarExpr>(e))
{
CompilerType elem = EvaluateType(star->GetX());
return elem.GetPointerType();
}
if (auto* paren = llvm::dyn_cast<GoASTParenExpr>(e))
return EvaluateType(paren->GetX());
if (auto* array = llvm::dyn_cast<GoASTArrayType>(e))
{
CompilerType elem = EvaluateType(array->GetElt());
}
m_error.SetErrorStringWithFormat("Invalid %s in type expression", e->GetKindName());
return CompilerType();
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitCallExpr(const lldb_private::GoASTCallExpr *e)
{
ValueObjectSP x = EvaluateExpr(e->GetFun());
if (x || e->NumArgs() != 1)
{
m_error.SetErrorStringWithFormat("Code execution not supported");
return nullptr;
}
m_error.Clear();
CompilerType type = EvaluateType(e->GetFun());
if (!type)
{
return nullptr;
}
ValueObjectSP value = EvaluateExpr(e->GetArgs(0));
if (!value)
return nullptr;
// TODO: Handle special conversions
return value->Cast(type);
}
GoPersistentExpressionState::GoPersistentExpressionState() : PersistentExpressionState(eKindGo)
{
}
ConstString
GoPersistentExpressionState::GetNextPersistentVariableName ()
{
char name_cstr[256];
// We can't use the same variable format as clang.
::snprintf (name_cstr, sizeof(name_cstr), "$go%u", m_next_persistent_variable_id++);
ConstString name(name_cstr);
return name;
}
void
GoPersistentExpressionState::RemovePersistentVariable (lldb::ExpressionVariableSP variable)
{
RemoveVariable(variable);
const char *name = variable->GetName().AsCString();
if (*(name++) != '$')
return;
if (*(name++) != 'g')
return;
if (*(name++) != 'o')
return;
if (strtoul(name, NULL, 0) == m_next_persistent_variable_id - 1)
m_next_persistent_variable_id--;
}

source/Plugins/ExpressionParser/Go/Makefile

  • This file was added.
##===- source/Plugins/ExpressionParser/Clang ---------------*- Makefile -*-===##
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
##===----------------------------------------------------------------------===##
LLDB_LEVEL := ../../../..
LIBRARYNAME := lldbPluginExpressionParserGo
BUILD_ARCHIVE = 1
include $(LLDB_LEVEL)/Makefile

source/Plugins/ExpressionParser/Go/gen_go_ast.py

  • This file was added.
import StringIO
def addNodes():
addNode("ArrayType", "Expr", "len", "Expr", "elt", "Expr")
addNode("AssignStmt", "Stmt", "lhs", "[]Expr", "rhs", "[]Expr", "define", "bool")
addNode("BadDecl", "Decl")
addNode("BadExpr", "Expr")
addNode("BadStmt", "Stmt")
addNode("BasicLit", "Expr", "value", "Token")
addNode("BinaryExpr", "Expr", "x", "Expr", "y", "Expr", "op", "TokenType")
addNode("BlockStmt", "Stmt", "list", "[]Stmt")
addNode("Ident", "Expr", "name", "Token")
addNode("BranchStmt", "Stmt", "label", "Ident", "tok", "TokenType")
addNode("CallExpr", "Expr", "fun", "Expr", "args", "[]Expr", "ellipsis", "bool")
addNode("CaseClause", "Stmt", "list", "[]Expr", "body", "[]Stmt")
addNode("ChanType", "Expr", "dir", "ChanDir", "value", "Expr")
addNode("CommClause", "Stmt", "comm", "Stmt", "body", "[]Stmt")
addNode("CompositeLit", "Expr", "type", "Expr", "elts", "[]Expr")
addNode("DeclStmt", "Stmt", "decl", "Decl")
addNode("DeferStmt", "Stmt", "call", "CallExpr")
addNode("Ellipsis", "Expr", "elt", "Expr")
addNode("EmptyStmt", "Stmt")
addNode("ExprStmt", "Stmt", "x", "Expr")
addNode("Field", "Node", "names", "[]Ident", "type", "Expr", "tag", "BasicLit")
addNode("FieldList", "Node", "list", "[]Field")
addNode("ForStmt", "Stmt", "init", "Stmt", "cond", "Expr", "post", "Stmt", "body", "BlockStmt")
addNode("FuncType", "Expr", "params", "FieldList", "results", "FieldList")
addNode("FuncDecl", "Decl", "recv", "FieldList", "name", "Ident", "type", "FuncType", "body", "BlockStmt")
addNode("FuncLit", "Expr", "type", "FuncType", "body", "BlockStmt")
addNode("GenDecl", "Decl", "tok", "TokenType", "specs", "[]Spec")
addNode("GoStmt", "Stmt", "call", "CallExpr")
addNode("IfStmt", "Stmt", "init", "Stmt", "cond", "Expr", "body", "BlockStmt", "els", "Stmt")
addNode("ImportSpec", "Spec", "name", "Ident", "path", "BasicLit")
addNode("IncDecStmt", "Stmt", "x", "Expr", "tok", "TokenType")
addNode("IndexExpr", "Expr", "x", "Expr", "index", "Expr")
addNode("InterfaceType", "Expr", "methods", "FieldList")
addNode("KeyValueExpr", "Expr", "key", "Expr", "value", "Expr")
addNode("LabeledStmt", "Stmt", "label", "Ident", "stmt", "Stmt")
addNode("MapType", "Expr", "key", "Expr", "value", "Expr")
addNode("ParenExpr", "Expr", "x", "Expr")
addNode("RangeStmt", "Stmt", "key", "Expr", "value", "Expr", "define", "bool", "x", "Expr", "body", "BlockStmt")
addNode("ReturnStmt", "Stmt", "results", "[]Expr")
addNode("SelectStmt", "Stmt", "body", "BlockStmt")
addNode("SelectorExpr", "Expr", "x", "Expr", "sel", "Ident")
addNode("SendStmt", "Stmt", "chan", "Expr", "value", "Expr")
addNode("SliceExpr", "Expr", "x", "Expr", "low", "Expr", "high", "Expr", "max", "Expr", "slice3", "bool")
addNode("StarExpr", "Expr", "x", "Expr")
addNode("StructType", "Expr", "fields", "FieldList")
addNode("SwitchStmt", "Stmt", "init", "Stmt", "tag", "Expr", "body", "BlockStmt")
addNode("TypeAssertExpr", "Expr", "x", "Expr", "type", "Expr")
addNode("TypeSpec", "Spec", "name", "Ident", "type", "Expr")
addNode("TypeSwitchStmt", "Stmt", "init", "Stmt", "assign", "Stmt", "body", "BlockStmt")
addNode("UnaryExpr", "Expr", "op", "TokenType", "x", "Expr")
addNode("ValueSpec", "Spec", "names", "[]Ident", "type", "Expr", "values", "[]Expr")
addParent("Decl", "Node")
addParent("Expr", "Node")
addParent("Spec", "Node")
addParent("Stmt", "Node")
kinds = {}
parentClasses = StringIO.StringIO()
childClasses = StringIO.StringIO()
walker = StringIO.StringIO()
def startClass(name, parent, out):
out.write("""
class GoAST%s : public GoAST%s
{
public:
""" % (name, parent))
def endClass(name, out):
out.write("""
%(name)s(const %(name)s&) = delete;
const %(name)s& operator=(const %(name)s&) = delete;
};
""" % {'name': 'GoAST' + name})
def addNode(name, parent, *children):
startClass(name, parent, childClasses)
l = kinds.setdefault(parent, [])
l.append(name)
addConstructor(name, parent, children)
childClasses.write("""
const char* GetKindName() const { return "%(name)s"; }
static bool
classof(const GoASTNode* n) { return n->GetKind() == e%(name)s; }
""" % {'name':name})
addChildren(name, children)
endClass(name, childClasses)
def isValueType(typename):
if typename[0].islower():
return True
if typename[0].isupper():
return typename.startswith('Token') or typename == 'ChanDir'
return False
def addConstructor(name, parent, children):
childNames = [children[i] for i in xrange(0, len(children), 2)]
childTypes = [children[i] for i in xrange(1, len(children), 2)]
if len(childTypes) != len(childNames):
raise Exception("Invalid children for %s: %s" % (name, children))
for x in childTypes:
if x.startswith("[]"):
filteredChildNames = []
filteredChildTypes = []
for i in xrange(len(childTypes)):
if isValueType(childTypes[i]):
filteredChildNames.append(childNames[i])
filteredChildTypes.append(childTypes[i])
childNames = filteredChildNames
childTypes = filteredChildTypes
break
childClasses.write(' ')
if len(childNames) == 1:
childClasses.write('explicit ')
childClasses.write('GoAST%s(' % name)
for i in xrange(len(childNames)):
if i > 0:
childClasses.write(', ')
t = childTypes[i]
if isValueType(t):
childClasses.write(t)
else:
t = "GoAST" + t
childClasses.write('%s*' % t)
childClasses.write(' ')
childClasses.write(childNames[i])
childClasses.write(') : GoAST%s(e%s)' % (parent, name))
for n in childNames:
childClasses.write(', ')
childClasses.write('m_%(name)s(%(name)s)' %{'name':n})
childClasses.write(""" {}
virtual ~GoAST%s() { }
""" % name)
def addChildren(name, children):
if len(children) == 0:
return
childNames = [children[i] for i in xrange(0, len(children), 2)]
childTypes = [children[i] for i in xrange(1, len(children), 2)]
varTypes = []
walker.write("""
case e%(n)s:
{
GoAST%(n)s* n = llvm::cast<GoAST%(n)s>(this);
(void)n;""" % {'n':name})
for i in xrange(len(childNames)):
t = childTypes[i]
vname = childNames[i]
tname = vname.title()
if t.startswith('[]'):
t = t[2:]
varTypes.append('std::vector<std::unique_ptr<GoAST%s> >' % t)
childClasses.write("""
size_t Num%(title)s() const { return m_%(var)s.size(); }
const %(type)s* Get%(title)s(int i) const { return m_%(var)s[i].get(); }
void Add%(title)s(%(type)s* %(var)s) { m_%(var)s.push_back(std::unique_ptr<%(type)s>(%(var)s)); }
""" % {'type':"GoAST%s" % t, 'title': tname, 'var': vname})
walker.write("""
for (auto& e : n->m_%s) { v(e.get()); }""" % vname)
else:
const = ''
get = ''
set = ''
if isValueType(t):
varTypes.append(t)
set = 'm_%(n)s = %(n)s' % {'n': vname}
else:
t = 'GoAST' + t
varTypes.append('std::unique_ptr<%s>' % t)
t = t + '*'
const = 'const '
get = '.get()'
set = 'm_%(n)s.reset(%(n)s)' % {'n': vname}
walker.write("""
v(n->m_%s.get());""" % vname)
childClasses.write("""
%(const)s%(type)s Get%(title)s() const { return m_%(var)s%(get)s; }
void Set%(title)s(%(type)s %(var)s) { %(set)s; }
""" % {'const':const, 'title': tname, 'var': vname, 'get': get, 'set': set, 'type': t})
childClasses.write('\nprivate:\n friend class GoASTNode;\n')
walker.write("""
return;
}""")
for i in xrange(len(childNames)):
t = varTypes[i]
name = childNames[i]
childClasses.write(' %s m_%s;\n' %(t, name))
def addParent(name, parent):
startClass(name, parent, parentClasses)
l = kinds[name]
minName = l[0]
maxName = l[-1]
parentClasses.write(""" template <typename R, typename V>
R Visit(V* v) const;
static bool
classof(const GoASTNode* n) { return n->GetKind() >= e%s && n->GetKind() <= e%s; }
protected:
explicit GoAST%s(NodeKind kind) : GoASTNode(kind) { }
private:
""" % (minName, maxName, name))
endClass(name, parentClasses)
addNodes()
print """//===-- GoAST.h -------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// DO NOT EDIT.
// Generated by gen_go_ast.py
#ifndef liblldb_GoAST_h
#define liblldb_GoAST_h
#include "lldb/lldb-forward.h"
#include "lldb/lldb-private.h"
#include "lldb/Expression/GoLexer.h"
#include "llvm/Support/Casting.h"
namespace lldb_private {
class GoASTNode {
public:
typedef GoLexer::TokenType TokenType;
typedef GoLexer::Token Token;
enum ChanDir {
eChanBidir,
eChanSend,
eChanRecv,
};
enum NodeKind
{"""
for l in kinds.itervalues():
for x in l:
print " e%s," % x
print """ };
virtual ~GoASTNode() { }
NodeKind GetKind() const { return m_kind; }
virtual const char* GetKindName() const = 0;
template <typename V>
void WalkChildren(V &v);
protected:
explicit GoASTNode(NodeKind kind) : m_kind(kind) { }
private:
const NodeKind m_kind;
GoASTNode(const GoASTNode&) = delete;
const GoASTNode& operator=(const GoASTNode&) = delete;
};
"""
print parentClasses.getvalue()
print childClasses.getvalue()
for k, l in kinds.iteritems():
if k == 'Node':
continue
print """
template <typename R, typename V>
R GoAST%s::Visit(V* v) const
{
switch(GetKind())
{""" % k
for subtype in l:
print """ case e%(n)s:
return v->Visit%(n)s(llvm::cast<const GoAST%(n)s>(this));""" % {'n':subtype}
print """ default:
assert(false && "Invalid kind");
}
}"""
print """
template <typename V>
void GoASTNode::WalkChildren(V &v)
{
switch (m_kind)
{
"""
print walker.getvalue()
print"""
default:
break;
}
}
} // namespace lldb_private
#endif
"""

source/Symbol/GoASTContext.cpp

Context not available.
#include "lldb/Symbol/GoASTContext.h" #include "lldb/Symbol/GoASTContext.h"
#include "lldb/Symbol/Type.h" #include "lldb/Symbol/Type.h"
#include "lldb/Target/ExecutionContext.h" #include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Target.h"
#include "Plugins/ExpressionParser/Go/GoUserExpression.h"
#include "Plugins/SymbolFile/DWARF/DWARFASTParserGo.h" #include "Plugins/SymbolFile/DWARF/DWARFASTParserGo.h"
using namespace lldb; using namespace lldb;
Context not available.
}; };
GoStruct(int kind, const ConstString &name, int64_t byte_size) GoStruct(int kind, const ConstString &name, int64_t byte_size)
: GoType(kind, name) : GoType(kind == 0 ? KIND_STRUCT : kind, name)
, m_is_complete(false) , m_is_complete(false)
, m_byte_size(byte_size) , m_byte_size(byte_size)
{ {
Context not available.
return false; return false;
if (kind == GoType::KIND_PTR) if (kind == GoType::KIND_PTR)
return false; return false;
if (kind == GoType::KIND_CHAN)
return false;
if (kind == GoType::KIND_MAP)
return false;
if (kind == GoType::KIND_STRING) if (kind == GoType::KIND_STRING)
return false; return false;
if (kind == GoType::KIND_UNSAFEPOINTER) if (kind == GoType::KIND_UNSAFEPOINTER)
Context not available.
case GoType::KIND_PTR: case GoType::KIND_PTR:
case GoType::KIND_UNSAFEPOINTER: case GoType::KIND_UNSAFEPOINTER:
case GoType::KIND_CHAN: case GoType::KIND_CHAN:
// TODO: is map a pointer? string? function? case GoType::KIND_MAP:
// TODO: is function a pointer?
return true; return true;
default: default:
return false; return false;
Context not available.
{ {
return array->GetLength(); return array->GetLength();
} }
else if (t->IsTypedef())
{
return t->GetElementType().GetNumChildren(omit_empty_base_classes);
}
return GetNumFields(type); return GetNumFields(type);
} }
Context not available.
uint32_t uint32_t
GoASTContext::GetIndexOfChildWithName(lldb::opaque_compiler_type_t type, const char *name, bool omit_empty_base_classes) GoASTContext::GetIndexOfChildWithName(lldb::opaque_compiler_type_t type, const char *name, bool omit_empty_base_classes)
{ {
if (!type || !GetCompleteType(type))
return UINT_MAX;
GoType *t = static_cast<GoType *>(type); GoType *t = static_cast<GoType *>(type);
GoStruct *s = t->GetStruct(); GoStruct *s = t->GetStruct();
if (s) if (s)
Context not available.
m_dwarf_ast_parser_ap.reset(new DWARFASTParserGo(*this)); m_dwarf_ast_parser_ap.reset(new DWARFASTParserGo(*this));
return m_dwarf_ast_parser_ap.get(); return m_dwarf_ast_parser_ap.get();
} }
UserExpression *
GoASTContextForExpr::GetUserExpression(const char *expr, const char *expr_prefix, lldb::LanguageType language,
Expression::ResultType desired_type)
{
TargetSP target = m_target_wp.lock();
if (target)
return new GoUserExpression(*target, expr, expr_prefix, language, desired_type);
return nullptr;
}
Context not available.

source/Target/Target.cpp

Context not available.
#include "lldb/Interpreter/OptionValues.h" #include "lldb/Interpreter/OptionValues.h"
#include "lldb/Interpreter/Property.h" #include "lldb/Interpreter/Property.h"
#include "lldb/Symbol/ClangASTContext.h" #include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/GoASTContext.h"
#include "lldb/Symbol/ObjectFile.h" #include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Function.h" #include "lldb/Symbol/Function.h"
#include "lldb/Symbol/Symbol.h" #include "lldb/Symbol/Symbol.h"
Context not available.
m_scratch_type_system_map[language].reset(GetScratchClangASTContextImpl()); m_scratch_type_system_map[language].reset(GetScratchClangASTContextImpl());
return m_scratch_type_system_map[language].get(); return m_scratch_type_system_map[language].get();
} }
else if (eLanguageTypeGo == language)
{
m_scratch_type_system_map[language].reset(new GoASTContextForExpr(shared_from_this()));
return m_scratch_type_system_map[language].get();
}
return nullptr; return nullptr;
} }
Context not available.
TypeSystem *type_system = GetScratchTypeSystemForLanguage(language, true); TypeSystem *type_system = GetScratchTypeSystemForLanguage(language, true);
if (type_system) if (type_system)
{
return type_system->GetPersistentExpressionState(); return type_system->GetPersistentExpressionState();
} return nullptr;
else
{
return nullptr;
}
} }
UserExpression * UserExpression *
Context not available.

test/lang/go/expressions/TestExpressions.py

  • This file was added.
"""Test the go expression parser/interpreter."""
import os, time
import unittest2
import lldb
import lldbutil
from lldbtest import *
class TestGoUserExpression(TestBase):
mydir = TestBase.compute_mydir(__file__)
@python_api_test
@skipIfRemote # Not remote test suit ready
@skipUnlessGoInstalled
def test_with_dsym_and_python_api(self):
"""Test GoASTUserExpress."""
self.buildGo()
self.launchProcess()
self.go_expressions()
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line numbers to break inside main().
self.main_source = "main.go"
self.break_line = line_number(self.main_source, '// Set breakpoint here.')
def check_builtin(self, name, size=0, typeclass=lldb.eTypeClassBuiltin):
tl = self.target().FindTypes(name)
self.assertEqual(1, len(tl))
t = list(tl)[0]
self.assertEqual(name, t.name)
self.assertEqual(typeclass, t.type)
if size > 0:
self.assertEqual(size, t.size)
def launchProcess(self):
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
bpt = target.BreakpointCreateByLocation(self.main_source, self.break_line)
self.assertTrue(bpt, VALID_BREAKPOINT)
# Now launch the process, and do not stop at entry point.
process = target.LaunchSimple (None, None, self.get_process_working_directory())
self.assertTrue(process, PROCESS_IS_VALID)
# The stop reason of the thread should be breakpoint.
thread_list = lldbutil.get_threads_stopped_at_breakpoint (process, bpt)
# Make sure we stopped at the first breakpoint.
self.assertTrue (len(thread_list) != 0, "No thread stopped at our breakpoint.")
self.assertTrue (len(thread_list) == 1, "More than one thread stopped at our breakpoint.")
frame = thread_list[0].GetFrameAtIndex(0)
self.assertTrue (frame, "Got a valid frame 0 frame.")
def go_expressions(self):
frame = self.frame()
v = frame.EvaluateExpression("1")
self.assertEqual(1, v.GetValueAsSigned())
x = frame.EvaluateExpression("x")
self.assertEqual(22, x.GetValueAsSigned())
a = frame.EvaluateExpression("a")
self.assertEqual(3, a.GetNumChildren())
a0 = a.GetChildAtIndex(0)
self.assertEqual(8, a0.GetValueAsSigned())
# Array indexing
a0 = frame.EvaluateExpression("a[0]")
self.assertEqual(8, a0.GetValueAsSigned())
# Slice indexing
b1 = frame.EvaluateExpression("b[1]")
self.assertEqual(9, b1.GetValueAsSigned())
# Test global in this package
g = frame.EvaluateExpression("myGlobal")
self.assertEqual(17, g.GetValueAsSigned(), str(g))
# Global with package name
g = frame.EvaluateExpression("main.myGlobal")
self.assertEqual(17, g.GetValueAsSigned(), str(g))
# Global with quoted package name
g = frame.EvaluateExpression('"main".myGlobal')
self.assertEqual(17, g.GetValueAsSigned(), str(g))
# Casting with package local type
s = frame.EvaluateExpression("*(*myStruct)(i.data)")
sb = s.GetChildMemberWithName("a")
self.assertEqual(2, sb.GetValueAsSigned())
# casting with explicit package
s = frame.EvaluateExpression("*(*main.myStruct)(i.data)")
sb = s.GetChildMemberWithName("a")
self.assertEqual(2, sb.GetValueAsSigned())
# Casting quoted package
s = frame.EvaluateExpression('*(*"main".myStruct)(i.data)')
sb = s.GetChildMemberWithName("b")
self.assertEqual(-1, sb.GetValueAsSigned())
if __name__ == '__main__':
import atexit
lldb.SBDebugger.Initialize()
atexit.register(lambda: lldb.SBDebugger.Terminate())
unittest2.main()

test/lang/go/expressions/main.go

  • This file was added.
package main
import "fmt"
type myStruct struct {
a, b int
}
var myGlobal = 17
func myFunc(i interface{}) {
a := [...]int{8, 9, 10}
b := a[:]
x := 22
fmt.Println(a, b, x, i, myGlobal) // Set breakpoint here.
}
func main() {
s := myStruct {2, -1}
myFunc(s)
}
No newline at end of file

unittests/CMakeLists.txt

Context not available.
llvm_config(${test_name} ${LLVM_LINK_COMPONENTS}) llvm_config(${test_name} ${LLVM_LINK_COMPONENTS})
endfunction() endfunction()
add_subdirectory(Expression)
add_subdirectory(Host) add_subdirectory(Host)
add_subdirectory(Interpreter) add_subdirectory(Interpreter)
add_subdirectory(Utility) add_subdirectory(Utility)
Context not available.

unittests/Expression/CMakeLists.txt

  • This file was added.
add_lldb_unittest(ExpressionTests
GoParserTest.cpp
)

unittests/Expression/GoParserTest.cpp

  • This file was added.
//===-- GoParserTest.cpp ------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#if defined(_MSC_VER) && (_HAS_EXCEPTIONS == 0)
// Workaround for MSVC standard library bug, which fails to include <thread> when
// exceptions are disabled.
#include <eh.h>
#endif
#include <sstream>
#include "gtest/gtest.h"
#include "lldb/Core/Error.h"
#include "lldb/Expression/GoParser.h"
using namespace lldb_private;
namespace {
struct ASTPrinter {
ASTPrinter(GoASTNode* n) {
(*this)(n);
}
void operator()(GoASTNode* n) {
if (n == nullptr) {
m_stream << "nil ";
return;
}
m_stream << "(" << n->GetKindName() << " ";
n->WalkChildren(*this);
if (auto* nn = llvm::dyn_cast<GoASTAssignStmt>(n))
m_stream << nn->GetDefine() << " ";
if (auto* nn = llvm::dyn_cast<GoASTBasicLit>(n))
m_stream << nn->GetValue().m_value.str() << " ";
if (auto* nn = llvm::dyn_cast<GoASTBinaryExpr>(n))
m_stream << GoLexer::LookupToken(nn->GetOp()).str() << " ";
if (auto* nn = llvm::dyn_cast<GoASTIdent>(n))
m_stream << nn->GetName().m_value.str() << " ";
if (auto* nn = llvm::dyn_cast<GoASTBranchStmt>(n))
m_stream << GoLexer::LookupToken(nn->GetTok()).str() << " ";
if (auto* nn = llvm::dyn_cast<GoASTCallExpr>(n))
m_stream << (nn->GetEllipsis() ? "..." : "") << " ";
if (auto* nn = llvm::dyn_cast<GoASTChanType>(n))
m_stream << nn->GetDir() << " ";
if (auto* nn = llvm::dyn_cast<GoASTGenDecl>(n))
m_stream << GoLexer::LookupToken(nn->GetTok()).str() << " ";
if (auto* nn = llvm::dyn_cast<GoASTIncDecStmt>(n))
m_stream << GoLexer::LookupToken(nn->GetTok()).str() << " ";
if (auto* nn = llvm::dyn_cast<GoASTRangeStmt>(n))
m_stream << nn->GetDefine() << " ";
if (auto* nn = llvm::dyn_cast<GoASTSliceExpr>(n))
m_stream << nn->GetSlice3() << " ";
if (auto* nn = llvm::dyn_cast<GoASTUnaryExpr>(n))
m_stream << GoLexer::LookupToken(nn->GetOp()).str() << " ";
m_stream << ") ";
}
const std::string str() const { return m_stream.str(); }
std::stringstream m_stream;
};
testing::AssertionResult CheckStatement(const char* _s, const char* c_expr, const char* sexpr, const char *code)
{
GoParser parser(code);
std::unique_ptr<GoASTStmt> stmt(parser.Statement());
if (parser.Failed() || !stmt)
{
Error err;
parser.GetError(err);
return testing::AssertionFailure() << "Error parsing " << c_expr << "\n\t" << err.AsCString();
}
std::string actual_sexpr = ASTPrinter(stmt.get()).str();
if (actual_sexpr == sexpr)
return testing::AssertionSuccess();
return testing::AssertionFailure() << "Parsing: " << c_expr << "\nExpected: " << sexpr << "\nGot: " << actual_sexpr;
}
} // namespace
#define EXPECT_PARSE(s, c) EXPECT_PRED_FORMAT2(CheckStatement, s, c)
TEST (GoParserTest, ParseBasicLiterals)
{
EXPECT_PARSE("(ExprStmt (BasicLit 0 ) ) ", "0");
EXPECT_PARSE("(ExprStmt (BasicLit 42 ) ) ", "42");
EXPECT_PARSE("(ExprStmt (BasicLit 0600 ) ) ", "0600");
EXPECT_PARSE("(ExprStmt (BasicLit 0xBadFace ) ) ", "0xBadFace");
EXPECT_PARSE("(ExprStmt (BasicLit 170141183460469231731687303715884105727 ) ) ", "170141183460469231731687303715884105727");
EXPECT_PARSE("(ExprStmt (BasicLit 0. ) ) ", "0.");
EXPECT_PARSE("(ExprStmt (BasicLit 72.40 ) ) ", "72.40");
EXPECT_PARSE("(ExprStmt (BasicLit 072.40 ) ) ", "072.40");
EXPECT_PARSE("(ExprStmt (BasicLit 2.71828 ) ) ", "2.71828");
EXPECT_PARSE("(ExprStmt (BasicLit 1.e+0 ) ) ", "1.e+0");
EXPECT_PARSE("(ExprStmt (BasicLit 6.67428e-11 ) ) ", "6.67428e-11");
EXPECT_PARSE("(ExprStmt (BasicLit 1E6 ) ) ", "1E6");
EXPECT_PARSE("(ExprStmt (BasicLit .12345E+6 ) ) ", ".12345E+6");
EXPECT_PARSE("(ExprStmt (BasicLit 0i ) ) ", "0i");
EXPECT_PARSE("(ExprStmt (BasicLit 011i ) ) ", "011i");
EXPECT_PARSE("(ExprStmt (BasicLit 0.i ) ) ", "0.i");
EXPECT_PARSE("(ExprStmt (BasicLit 2.71828i ) ) ", "2.71828i");
EXPECT_PARSE("(ExprStmt (BasicLit 6.67428e-11i ) ) ", "6.67428e-11i");
EXPECT_PARSE("(ExprStmt (BasicLit 1E6i ) ) ", "1E6i");
EXPECT_PARSE("(ExprStmt (BasicLit .12345E+6i ) ) ", ".12345E+6i");
EXPECT_PARSE("(ExprStmt (BasicLit 'a' ) ) ", "'a'");
EXPECT_PARSE("(ExprStmt (BasicLit '本' ) ) ", "'本'");
EXPECT_PARSE("(ExprStmt (BasicLit \"abc\" ) ) ", "\"abc\"");
EXPECT_PARSE("(ExprStmt (BasicLit `abc` ) ) ", "`abc`");
EXPECT_PARSE("(ExprStmt (BasicLit `ab\nc` ) ) ", "`ab\nc`");
}
TEST (GoParserTest, ParseOperand)
{
EXPECT_PARSE("(ExprStmt (Ident a ) ) ", "a");
EXPECT_PARSE("(ExprStmt (Ident _x9 ) ) ", "_x9");
EXPECT_PARSE("(ExprStmt (Ident ThisVariableIsExported ) ) ", "ThisVariableIsExported");
EXPECT_PARSE("(ExprStmt (Ident αβ ) ) ", "αβ");
EXPECT_PARSE("(ExprStmt (SelectorExpr (Ident math ) (Ident Sin ) ) ) ", "math.Sin");
}
TEST (GoParserTest, ParseCompositeLiterals)
{
EXPECT_PARSE("(ExprStmt (CompositeLit (Ident Point3D ) ) ) ", "Point3D{}");
EXPECT_PARSE("(ExprStmt (CompositeLit (Ident Line ) (Ident origin ) (CompositeLit (Ident Point3D ) (KeyValueExpr (Ident y ) (UnaryExpr (BasicLit 4 ) - ) ) (KeyValueExpr (Ident z ) (BasicLit 12.3 ) ) ) ) ) ",
"Line{origin, Point3D{y: -4, z: 12.3}}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (BasicLit 10 ) (Ident string ) ) ) ) ", "[10]string{}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (BasicLit 6 ) (Ident int ) ) (BasicLit 1 ) (BasicLit 2 ) (BasicLit 3 ) (BasicLit 5 ) ) ) ",
"[6]int {1, 2, 3, 5}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType nil (Ident int ) ) (BasicLit 2 ) (BasicLit 3 ) (BasicLit 5 ) (BasicLit 7 ) (BasicLit 9 ) (BasicLit 2147483647 ) ) ) ",
"[]int{2, 3, 5, 7, 9, 2147483647}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (BasicLit 128 ) (Ident bool ) ) (KeyValueExpr (BasicLit 'a' ) (Ident true ) ) (KeyValueExpr (BasicLit 'e' ) (Ident true ) ) (KeyValueExpr (BasicLit 'i' ) (Ident true ) ) (KeyValueExpr (BasicLit 'o' ) (Ident true ) ) (KeyValueExpr (BasicLit 'u' ) (Ident true ) ) (KeyValueExpr (BasicLit 'y' ) (Ident true ) ) ) ) ",
"[128]bool{'a': true, 'e': true, 'i': true, 'o': true, 'u': true, 'y': true}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (BasicLit 10 ) (Ident float32 ) ) (UnaryExpr (BasicLit 1 ) - ) (KeyValueExpr (BasicLit 4 ) (UnaryExpr (BasicLit 0.1 ) - ) ) (UnaryExpr (BasicLit 0.1 ) - ) (KeyValueExpr (BasicLit 9 ) (UnaryExpr (BasicLit 1 ) - ) ) ) ) ",
"[10]float32{-1, 4: -0.1, -0.1, 9: -1}");
}
TEST (GoParserTest, ParseEllipsisArray)
{
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (Ellipsis nil ) (Ident string ) ) (BasicLit `Sat` ) (BasicLit `Sun` ) ) ) ",
"[...]string {`Sat`, `Sun`}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (Ellipsis nil ) (Ident Point ) ) (CompositeLit nil (BasicLit 1.5 ) (UnaryExpr (BasicLit 3.5 ) - ) ) (CompositeLit nil (BasicLit 0 ) (BasicLit 0 ) ) ) ) ",
"[...]Point{{1.5, -3.5}, {0, 0}}");
}
TEST (GoParserTest, ParseMap)
{
EXPECT_PARSE("(ExprStmt (CompositeLit (MapType (Ident string ) (Ident float32 ) ) (KeyValueExpr (BasicLit `C0` ) (BasicLit 16.35 ) ) (KeyValueExpr (BasicLit `D0` ) (BasicLit 18.35 ) ) ) ) ",
"map[string]float32{`C0`: 16.35, `D0`: 18.35, }");
}
TEST (GoParserTest, UnaryExpr)
{
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) + ) ) ", "+x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) - ) ) ", "-x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) ! ) ) ", "!x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) ^ ) ) ", "^x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) & ) ) ", "&x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) <- ) ) ", "<-x");
EXPECT_PARSE("(ExprStmt (StarExpr (Ident x ) ) ) ", "*x");
}
TEST (GoParserTest, BinaryExpr)
{
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) || ) ) ", "a || b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) && ) ) ", "a && b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) == ) ) ", "a == b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) != ) ) ", "a != b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) < ) ) ", "a < b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) <= ) ) ", "a <= b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) > ) ) ", "a > b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) >= ) ) ", "a >= b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) + ) ) ", "a + b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) - ) ) ", "a - b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) | ) ) ", "a | b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) ^ ) ) ", "a ^ b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) * ) ) ", "a * b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) / ) ) ", "a / b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) % ) ) ", "a % b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) << ) ) ", "a << b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) >> ) ) ", "a >> b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) & ) ) ", "a & b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) &^ ) ) ", "a &^ b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (BasicLit 23 ) (BinaryExpr (BasicLit 3 ) (IndexExpr (Ident x ) (Ident i ) ) * ) + ) ) ", "23 + 3*x[i]");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (UnaryExpr (UnaryExpr (Ident a ) + ) + ) + ) ) ", "a + + + a");
EXPECT_PARSE("(ExprStmt (BinaryExpr (UnaryExpr (Ident a ) ^ ) (Ident b ) >> ) ) ", "^a >> b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (CallExpr (Ident f ) ) (CallExpr (Ident g ) ) || ) ) ", "f() || g()");
EXPECT_PARSE("(ExprStmt (BinaryExpr (BinaryExpr (Ident x ) (BinaryExpr (Ident y ) (BasicLit 1 ) + ) == ) (BinaryExpr (UnaryExpr (Ident chanPtr ) <- ) (BasicLit 0 ) > ) && ) ) ", "x == y+1 && <-chanPtr > 0");
}
TEST (GoParserTest, PrimaryExpr)
{
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident x ) (CallExpr (Ident f ) ) <= ) ) ", "x <= f()");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident s ) (BasicLit `.txt` ) + ) ) ", "(s + `.txt`)");
EXPECT_PARSE("(ExprStmt (CallExpr (Ident f ) (BasicLit 3.1415 ) (Ident true ) ) ) ", "f(3.1415, true)");
EXPECT_PARSE("(ExprStmt (CallExpr (Ident f ) (BasicLit 3.1415 ) (Ident a ) ... ) ) ", "f(3.1415, a...)");
EXPECT_PARSE("(ExprStmt (IndexExpr (Ident m ) (BasicLit '1' ) ) ) ", "m['1']");
EXPECT_PARSE("(ExprStmt (SliceExpr (Ident s ) (Ident i ) (BinaryExpr (Ident j ) (BasicLit 1 ) + ) nil 0 ) ) ", "s[i : j + 1]");
EXPECT_PARSE("(ExprStmt (SelectorExpr (Ident obj ) (Ident color ) ) ) ", "obj.color");
EXPECT_PARSE("(ExprStmt (CallExpr (SelectorExpr (IndexExpr (SelectorExpr (Ident f ) (Ident p ) ) (Ident i ) ) (Ident x ) ) ) ) ", "f.p[i].x()");
}
TEST (GoParserTest, Conversions)
{
EXPECT_PARSE("(ExprStmt (StarExpr (CallExpr (Ident Point ) (Ident p ) ) ) ) ", "*Point(p)");
EXPECT_PARSE("(ExprStmt (CallExpr (StarExpr (Ident Point ) ) (Ident p ) ) ) ", "(*Point)(p)");
EXPECT_PARSE("(ExprStmt (UnaryExpr (CallExpr (ChanType (Ident int ) 0 ) (Ident c ) ) <- ) ) ", "<-chan int(c)");
EXPECT_PARSE("(ExprStmt (TypeAssertExpr (Ident y ) (SelectorExpr (Ident io ) (Ident Reader ) ) ) ) ", "y.(io.Reader)");
}