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Differential D79005

[LLD][COFF] Move debug info for thread-local variables into PDB global stream
ClosedPublic

Authored by aganea on Apr 28 2020, 7:17 AM.

Details

Reviewers
rnk
amccarth
MaskRay
mstorsjo
Commits
rG6adc45d3fd67: [LLD][COFF] Move debug info for thread-local variables into PDB global stream
Summary

Before this patch, the debug record S_GTHREAD32 which represents global thread_local symbols, was emitted by LLD into the respective module stream. This makes Visual Studio unable to display thread_local symbols in the debugger.

After this patch, S_GTHREAD32 is moved into the globals stream. This matches MSVC behavior.

Diff Detail

Event Timeline

aganea created this revision.Apr 28 2020, 7:17 AM
Herald added a project: Restricted Project. · View Herald TranscriptApr 28 2020, 7:17 AM
Herald added subscribers: llvm-commits, aprantl. · View Herald Transcript
Harbormaster completed remote builds in B54964: Diff 260628.Apr 28 2020, 8:02 AM
amccarth added a comment.Apr 29 2020, 8:36 AM

This seems to make sense.

I see you changed the test from a 32-bit one to a 64-bit one, which seems to be the bulk of this patch. Is bitness relevant to the problem being solved? Do we know thread-local variables are in the globals stream regardless of bitness?

rnk added inline comments.Apr 29 2020, 3:22 PM
lld/test/COFF/Inputs/pdb-globals.yaml
30

Do you mind checking what S_LTHREAD32 does? You probably just have to make a static thread local var.

aganea updated this revision to Diff 261312.Apr 30 2020, 12:08 PM
aganea marked an inline comment as done.
  • Generate yaml with the 32-bit toolchain to reduce variability.
  • Added local thread_local to cover S_LTHREAD32.
aganea added a comment.Apr 30 2020, 12:12 PM
In D79005#2010249, @amccarth wrote:

Is bitness relevant to the problem being solved? Do we know thread-local variables are in the globals stream regardless of bitness?

In this case, the globals stream is the same for 32-bit and 64-bit builds (except maybe for file offsets).

Harbormaster completed remote builds in B55348: Diff 261312.Apr 30 2020, 12:53 PM
rnk added inline comments.Apr 30 2020, 1:13 PM
lld/COFF/PDB.cpp
806

S_LTHREAD32 doesn't follow this pattern? I was kind of expecting it to show up wherever S_LDATA32 is.

lld/test/COFF/Inputs/pdb-globals.yaml
44

Huh, static thread_local int at global scope doesn't do it? And these don't show up in the PDB's global stream?

rnk added inline comments.Apr 30 2020, 1:31 PM
lld/COFF/PDB.cpp
805

Looks like we need to send S_LDATA32 to here.

lld/test/COFF/Inputs/pdb-globals.yaml
44

The example I came up with probably makes a better test case here, and we can handle function local globals (thread local or regular globals) in a follow-up.

$ cat t.cpp
namespace foo {
thread_local int global_tls;
int global_int() { return ++global_tls; }
static thread_local int static_tls;
int static_int() { return ++static_tls; }
int func_int() {
  thread_local int func_tls;
  return ++func_tls;
}
int func_static_int() {
  static int func_static;
  return ++func_static;
}
}

$ cl -c -Z7 t.cpp && link -dll -force t.obj  -debug && llvm-pdbutil dump -globals t.pdb | grep S_[LG]THREAD
Microsoft (R) C/C++ Optimizing Compiler Version 19.25.28612 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.

t.cpp
Microsoft (R) Incremental Linker Version 14.25.28612.0
Copyright (C) Microsoft Corporation.  All rights reserved.

     384 | S_LTHREAD32 [size = 32] `foo::static_tls`
     352 | S_GTHREAD32 [size = 32] `foo::global_tls`

I think we need to reuse the local S_UDT logic here, and return isGlobalScope from symbolGoesInGlobalsStream. Perhaps S_LDATA32 needs the same treatment.

aganea updated this revision to Diff 261551.May 1 2020, 2:37 PM
aganea marked 6 inline comments as done.
aganea added inline comments.
lld/COFF/PDB.cpp
805

Not exactly. S_LDATA32 always remains in the module stream, but is duplicated into the globals stream only if it's a global.

806

It is indeed following the same pattern!

Harbormaster completed remote builds in B55496: Diff 261551.May 1 2020, 7:29 PM
aganea added a comment.May 5 2020, 6:24 AM

Ping! Is there anything else to be done here?

amccarth accepted this revision.May 5 2020, 9:16 AM

LGTM, but I think we should hear again from rnk before landing this.

This revision is now accepted and ready to land.May 5 2020, 9:16 AM
rnk accepted this revision.May 5 2020, 4:09 PM

lgtm with a comment update, thanks!

lld/COFF/PDB.cpp
805

Ah, yes, this comment should've been in symbolGoesInGlobalsStream.

828

UDTs aren't global variables. I'd change the qualification to "unless they are function-local". At the end of the day, the linker only knows if the record is inside a matched pair of S_[LG]PROC32 / S_END records, i.e. function local. Maybe isGlobalScope should be renamed to isFunctionScope and inverted.

Closed by commit rG6adc45d3fd67: [LLD][COFF] Move debug info for thread-local variables into PDB global stream (authored by aganea). · Explain WhyMay 6 2020, 12:27 PM
This revision was automatically updated to reflect the committed changes.

Revision Contents

PathSize
lld/
COFF/
18 lines
test/
COFF/
Inputs/
614 lines
58 lines

Diff 262452

lld/COFF/PDB.cpp

Show First 20 Lines • Show All 786 Lines • ▼ Show 20 Linesstatic void scopeStackClose(SmallVectorImpl<SymbolScope> &stack,
SymbolScope s = stack.pop_back_val(); SymbolScope s = stack.pop_back_val();
s.openingRecord->ptrEnd = curOffset; s.openingRecord->ptrEnd = curOffset;
} }
static bool symbolGoesInModuleStream(const CVSymbol &sym, bool isGlobalScope) { static bool symbolGoesInModuleStream(const CVSymbol &sym, bool isGlobalScope) {
switch (sym.kind()) { switch (sym.kind()) {
case SymbolKind::S_GDATA32: case SymbolKind::S_GDATA32:
case SymbolKind::S_CONSTANT: case SymbolKind::S_CONSTANT:
case SymbolKind::S_GTHREAD32:
// We really should not be seeing S_PROCREF and S_LPROCREF in the first place // We really should not be seeing S_PROCREF and S_LPROCREF in the first place
// since they are synthesized by the linker in response to S_GPROC32 and // since they are synthesized by the linker in response to S_GPROC32 and
// S_LPROC32, but if we do see them, don't put them in the module stream I // S_LPROC32, but if we do see them, don't put them in the module stream I
// guess. // guess.
case SymbolKind::S_PROCREF: case SymbolKind::S_PROCREF:
case SymbolKind::S_LPROCREF: case SymbolKind::S_LPROCREF:
return false; return false;
// S_UDT records go in the module stream if it is not a global S_UDT. // S_UDT records go in the module stream if it is not a global S_UDT.
case SymbolKind::S_UDT: case SymbolKind::S_UDT:
return !isGlobalScope; return !isGlobalScope;
rnkUnsubmitted
Done
ReplyInline Actions

Looks like we need to send S_LDATA32 to here.

rnk: Looks like we need to send S_LDATA32 to here.
aganeaAuthorUnsubmitted
Done
ReplyInline Actions

Not exactly. S_LDATA32 always remains in the module stream, but is duplicated into the globals stream only if it's a global.

aganea: Not exactly. `S_LDATA32` always remains in the module stream, but is duplicated into the…
rnkUnsubmitted
Not Done
ReplyInline Actions

Ah, yes, this comment should've been in symbolGoesInGlobalsStream.

rnk: Ah, yes, this comment should've been in `symbolGoesInGlobalsStream`.
// S_GDATA32 does not go in the module stream, but S_LDATA32 does. // S_GDATA32 does not go in the module stream, but S_LDATA32 does.
rnkUnsubmitted
Done
ReplyInline Actions

S_LTHREAD32 doesn't follow this pattern? I was kind of expecting it to show up wherever S_LDATA32 is.

rnk: S_LTHREAD32 doesn't follow this pattern? I was kind of expecting it to show up wherever…
aganeaAuthorUnsubmitted
Done
ReplyInline Actions

It is indeed following the same pattern!

aganea: It is indeed following the same pattern!
case SymbolKind::S_LDATA32: case SymbolKind::S_LDATA32:
case SymbolKind::S_LTHREAD32:
default: default:
return true; return true;
} }
} }
static bool symbolGoesInGlobalsStream(const CVSymbol &sym, bool isGlobalScope) { static bool symbolGoesInGlobalsStream(const CVSymbol &sym,
bool isFunctionScope) {
switch (sym.kind()) { switch (sym.kind()) {
case SymbolKind::S_CONSTANT: case SymbolKind::S_CONSTANT:
case SymbolKind::S_GDATA32: case SymbolKind::S_GDATA32:
// S_LDATA32 goes in both the module stream and the globals stream. case SymbolKind::S_GTHREAD32:
case SymbolKind::S_LDATA32:
case SymbolKind::S_GPROC32: case SymbolKind::S_GPROC32:
case SymbolKind::S_LPROC32: case SymbolKind::S_LPROC32:
// We really should not be seeing S_PROCREF and S_LPROCREF in the first place // We really should not be seeing S_PROCREF and S_LPROCREF in the first place
// since they are synthesized by the linker in response to S_GPROC32 and // since they are synthesized by the linker in response to S_GPROC32 and
// S_LPROC32, but if we do see them, copy them straight through. // S_LPROC32, but if we do see them, copy them straight through.
case SymbolKind::S_PROCREF: case SymbolKind::S_PROCREF:
case SymbolKind::S_LPROCREF: case SymbolKind::S_LPROCREF:
return true; return true;
// S_UDT records go in the globals stream if it is a global S_UDT. // Records that go in the globals stream, unless they are function-local.
rnkUnsubmitted
Not Done
ReplyInline Actions

UDTs aren't global variables. I'd change the qualification to "unless they are function-local". At the end of the day, the linker only knows if the record is inside a matched pair of S_[LG]PROC32 / S_END records, i.e. function local. Maybe isGlobalScope should be renamed to isFunctionScope and inverted.

rnk: UDTs aren't global variables. I'd change the qualification to "unless they are function-local".
case SymbolKind::S_UDT: case SymbolKind::S_UDT:
return isGlobalScope; case SymbolKind::S_LDATA32:
case SymbolKind::S_LTHREAD32:
return !isFunctionScope;
default: default:
return false; return false;
} }
} }
static void addGlobalSymbol(pdb::GSIStreamBuilder &builder, uint16_t modIndex, static void addGlobalSymbol(pdb::GSIStreamBuilder &builder, uint16_t modIndex,
unsigned symOffset, const CVSymbol &sym) { unsigned symOffset, const CVSymbol &sym) {
switch (sym.kind()) { switch (sym.kind()) {
case SymbolKind::S_CONSTANT: case SymbolKind::S_CONSTANT:
case SymbolKind::S_UDT: case SymbolKind::S_UDT:
case SymbolKind::S_GDATA32: case SymbolKind::S_GDATA32:
case SymbolKind::S_GTHREAD32:
case SymbolKind::S_LTHREAD32:
case SymbolKind::S_LDATA32: case SymbolKind::S_LDATA32:
case SymbolKind::S_PROCREF: case SymbolKind::S_PROCREF:
case SymbolKind::S_LPROCREF: case SymbolKind::S_LPROCREF:
builder.addGlobalSymbol(sym); builder.addGlobalSymbol(sym);
break; break;
case SymbolKind::S_GPROC32: case SymbolKind::S_GPROC32:
case SymbolKind::S_LPROC32: { case SymbolKind::S_LPROC32: {
SymbolRecordKind k = SymbolRecordKind::ProcRefSym; SymbolRecordKind k = SymbolRecordKind::ProcRefSym;
▲ Show 20 Lines • Show All 97 Lines • ▼ Show 20 Lines cantFail(forEachCodeViewRecord<CVSymbol>(
scopeStackOpen(scopes, curSymOffset, sym); scopeStackOpen(scopes, curSymOffset, sym);
else if (symbolEndsScope(sym.kind())) else if (symbolEndsScope(sym.kind()))
scopeStackClose(scopes, curSymOffset, file); scopeStackClose(scopes, curSymOffset, file);
// Add the symbol to the globals stream if necessary. Do this before // Add the symbol to the globals stream if necessary. Do this before
// adding the symbol to the module since we may need to get the next // adding the symbol to the module since we may need to get the next
// symbol offset, and writing to the module's symbol stream will update // symbol offset, and writing to the module's symbol stream will update
// that offset. // that offset.
if (symbolGoesInGlobalsStream(sym, scopes.empty())) { if (symbolGoesInGlobalsStream(sym, !scopes.empty())) {
addGlobalSymbol(builder.getGsiBuilder(), addGlobalSymbol(builder.getGsiBuilder(),
file->moduleDBI->getModuleIndex(), curSymOffset, sym); file->moduleDBI->getModuleIndex(), curSymOffset, sym);
++globalSymbols; ++globalSymbols;
} }
if (symbolGoesInModuleStream(sym, scopes.empty())) { if (symbolGoesInModuleStream(sym, scopes.empty())) {
// Add symbols to the module in bulk. If this symbol is contiguous // Add symbols to the module in bulk. If this symbol is contiguous
// with the previous run of symbols to add, combine the ranges. If // with the previous run of symbols to add, combine the ranges. If
▲ Show 20 Lines • Show All 966 Lines • Show Last 20 Lines

lld/test/COFF/Inputs/pdb-globals.yaml

# // YAML Generated from the following source code: # // YAML Generated from the following source code:
# // Compile with clang-cl /Z7 /GS- /c t.obj pdb-globals.cpp # // Compile with clang-cl /Z7 /GS- /c a.cpp && obj2yaml a.obj >pdb-globals.yaml
# #
# void *__purecall = 0; # void *__purecall = 0;
# #
# struct HelloPoint { # struct HelloPoint {
# int X = 3; # int X = 3;
# int Y = 4; # int Y = 4;
# int Z = 5; # int Z = 5;
# }; # };
Show All 11 Lines
# const int *GlobalVar = &ConstantVar; # const int *GlobalVar = &ConstantVar;
# #
# // S_CONSTANT # // S_CONSTANT
# constexpr int ConstexprVar = 18; # constexpr int ConstexprVar = 18;
# #
# // S_UDT # // S_UDT
# typedef HelloPoint HelloPointTypedef; # typedef HelloPoint HelloPointTypedef;
# #
# // S_GTHREAD32
rnkUnsubmitted
Done
ReplyInline Actions

Do you mind checking what S_LTHREAD32 does? You probably just have to make a static thread local var.

rnk: Do you mind checking what `S_LTHREAD32` does? You probably just have to make a static thread…
# thread_local int GlobalTLS = 254;
#
# // S_LTHREAD32
# static thread_local int StaticTLS = 22;
#
# int main(int argc, char **argv) { # int main(int argc, char **argv) {
# HelloPointTypedef P; # HelloPointTypedef P;
# int N = P.X + P.Y + P.Z; # int N = P.X + P.Y + P.Z;
# N += LocalFunc() + GlobalFunc(); # N += LocalFunc() + GlobalFunc();
# N += *GlobalVar; # N += *GlobalVar;
# N += ConstexprVar; # N += ConstexprVar;
# N += GlobalTLS;
# N += StaticTLS;
# return N;
rnkUnsubmitted
Done
ReplyInline Actions

Huh, static thread_local int at global scope doesn't do it? And these don't show up in the PDB's global stream?

rnk: Huh, `static thread_local int` at global scope doesn't do it? And these don't show up in the…
rnkUnsubmitted
Done
ReplyInline Actions

The example I came up with probably makes a better test case here, and we can handle function local globals (thread local or regular globals) in a follow-up.

$ cat t.cpp
namespace foo {
thread_local int global_tls;
int global_int() { return ++global_tls; }
static thread_local int static_tls;
int static_int() { return ++static_tls; }
int func_int() {
  thread_local int func_tls;
  return ++func_tls;
}
int func_static_int() {
  static int func_static;
  return ++func_static;
}
}

$ cl -c -Z7 t.cpp && link -dll -force t.obj  -debug && llvm-pdbutil dump -globals t.pdb | grep S_[LG]THREAD
Microsoft (R) C/C++ Optimizing Compiler Version 19.25.28612 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.

t.cpp
Microsoft (R) Incremental Linker Version 14.25.28612.0
Copyright (C) Microsoft Corporation.  All rights reserved.

     384 | S_LTHREAD32 [size = 32] `foo::static_tls`
     352 | S_GTHREAD32 [size = 32] `foo::global_tls`

I think we need to reuse the local S_UDT logic here, and return isGlobalScope from symbolGoesInGlobalsStream. Perhaps S_LDATA32 needs the same treatment.

rnk: The example I came up with probably makes a better test case here, and we can handle function…
# } # }
--- !COFF --- !COFF
header: header:
Machine: IMAGE_FILE_MACHINE_I386 Machine: IMAGE_FILE_MACHINE_I386
Characteristics: [ ] Characteristics: [ ]
sections: sections:
- Name: .text - Name: .text
Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ] Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
Alignment: 16 Alignment: 16
SectionData: 5589E5B82B0000005DC3660F1F4400005589E583EC208B450C8B4D088D55F4894DEC89D18945E8E8000000008B4DF4034DF8034DFC894DF08945E4E8000000008945E0E80000000031C98B55E001C20355F08955F0A1000000008B000345F08945F08B45F083C0128945F089C883C4205DC366666666662E0F1F8400000000005589E5B82A0000005DC3 SectionData: 5589E5B82B0000005DC3660F1F4400005589E583EC248B450C8B4D08C745FC000000008D55F0894DE889D18945E4E8000000008B4DF08B55F401D18B55F801D1894DEC8945E0E8000000008945DCE8000000008B4DDC01C18B45EC01C88945ECA1000000008B008B4DEC01C1894DEC8B45EC83C0128945ECA100000000648B0D000000008B04818B88000000008B55EC01CA8955EC8B80000000000345EC8945EC8B45EC83C4245DC30F1F80000000005589E5B82A0000005DC3
Relocations: Relocations:
- VirtualAddress: 40 - VirtualAddress: 47
SymbolName: '??0HelloPoint@@QAE@XZ' SymbolName: '??0HelloPoint@@QAE@XZ'
Type: IMAGE_REL_I386_REL32 Type: IMAGE_REL_I386_REL32
- VirtualAddress: 60 - VirtualAddress: 71
SymbolName: '?LocalFunc@@YAHXZ' SymbolName: '?LocalFunc@@YAHXZ'
Type: IMAGE_REL_I386_REL32 Type: IMAGE_REL_I386_REL32
- VirtualAddress: 68 - VirtualAddress: 79
SymbolName: '?GlobalFunc@@YAHXZ' SymbolName: '?GlobalFunc@@YAHXZ'
Type: IMAGE_REL_I386_REL32 Type: IMAGE_REL_I386_REL32
- VirtualAddress: 86 - VirtualAddress: 97
SymbolName: '?GlobalVar@@3PBHB' SymbolName: '?GlobalVar@@3PBHB'
Type: IMAGE_REL_I386_DIR32 Type: IMAGE_REL_I386_DIR32
- VirtualAddress: 121
SymbolName: __tls_index
Type: IMAGE_REL_I386_DIR32
- VirtualAddress: 128
SymbolName: __tls_array
Type: IMAGE_REL_I386_DIR32
- VirtualAddress: 137
SymbolName: '?GlobalTLS@@3HA'
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 151
SymbolName: _StaticTLS
Type: IMAGE_REL_I386_SECREL
- Name: .data - Name: .data
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ] Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ]
Alignment: 4 Alignment: 4
SectionData: '00000000' SectionData: '00000000'
Relocations: Relocations:
- VirtualAddress: 0 - VirtualAddress: 0
SymbolName: _ConstantVar SymbolName: _ConstantVar
Type: IMAGE_REL_I386_DIR32 Type: IMAGE_REL_I386_DIR32
- Name: .bss - Name: .bss
Characteristics: [ IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ] Characteristics: [ IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ]
Alignment: 4 Alignment: 4
SectionData: '' SectionData: ''
SizeOfRawData: 4 SizeOfRawData: 4
- Name: .text - Name: .text
Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_LNK_COMDAT, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ] Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_LNK_COMDAT, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
Alignment: 16 Alignment: 16
SectionData: 5589E550894DFC8B4DFCC70103000000C7410404000000C741080500000089C883C4045DC3 SectionData: 5589E550894DFC8B45FCC70003000000C7400404000000C740080500000083C4045DC3
- Name: .rdata - Name: .rdata
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ ] Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ ]
Alignment: 4 Alignment: 4
SectionData: '11000000' SectionData: '11000000'
- Name: '.tls$'
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ]
Alignment: 4
SectionData: FE00000016000000
- Name: .drectve - Name: .drectve
Characteristics: [ IMAGE_SCN_LNK_INFO, IMAGE_SCN_LNK_REMOVE ] Characteristics: [ IMAGE_SCN_LNK_INFO, IMAGE_SCN_LNK_REMOVE ]
Alignment: 1 Alignment: 1
SectionData: 202F44454641554C544C49423A6C6962636D742E6C6962202F44454641554C544C49423A6F6C646E616D65732E6C6962 SectionData: 202F44454641554C544C49423A6C6962636D742E6C6962202F44454641554C544C49423A6F6C646E616D65732E6C6962
- Name: '.debug$S' - Name: '.debug$S'
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ] Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 4 Alignment: 4
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... ...

lld/test/COFF/pdb-globals.test

RUN: yaml2obj %S/Inputs/pdb-globals.yaml > %t.obj RUN: yaml2obj %S/Inputs/pdb-globals.yaml > %t.obj
RUN: lld-link /debug /nodefaultlib /entry:main /out:%t.exe /pdb:%t.pdb %t.obj RUN: lld-link /debug /nodefaultlib /entry:main /force /out:%t.exe /pdb:%t.pdb %t.obj
RUN: llvm-pdbutil dump -symbols -globals %t.pdb | FileCheck %s RUN: llvm-pdbutil dump -symbols -globals %t.pdb | FileCheck %s
RUN: lld-link /debug /nodefaultlib /entry:main /out:%t.exe /pdb:%t.pdb %t.obj /threads:1 RUN: lld-link /debug /nodefaultlib /entry:main /force /out:%t.exe /pdb:%t.pdb %t.obj /threads:1
RUN: llvm-pdbutil dump -symbols -globals %t.pdb | FileCheck %s RUN: llvm-pdbutil dump -symbols -globals %t.pdb | FileCheck %s
RUN: lld-link /debug /nodefaultlib /entry:main /out:%t.exe /pdb:%t.pdb %t.obj /threads:2 RUN: lld-link /debug /nodefaultlib /entry:main /force /out:%t.exe /pdb:%t.pdb %t.obj /threads:2
RUN: llvm-pdbutil dump -symbols -globals %t.pdb | FileCheck %s RUN: llvm-pdbutil dump -symbols -globals %t.pdb | FileCheck %s
# Test that we correctly distribute symbols between the globals and module # Test that we correctly distribute symbols between the globals and module
# symbol streams. Specifically: # symbol streams. Specifically:
# * S_UDT, S_GDATA32, and S_CONSTANT end up in the globals stream, and are # * S_UDT, S_GDATA32, and S_CONSTANT end up in the globals stream, and are
# omitted from the module stream. # omitted from the module stream.
# * S_GPROC32 and S_LPROC32 end up in the symbols stream, but S_PROCREF and # * S_GPROC32 and S_LPROC32 end up in the symbols stream, but S_PROCREF and
# S_LPROCREF are added to the globals stream that refer to the module # S_LPROCREF are added to the globals stream that refer to the module
# stream. # stream.
# * S_LDATA32 is copied byte for byte into both streams. # * S_LDATA32 is copied byte for byte into both streams.
CHECK-LABEL: Global Symbols CHECK-LABEL: Global Symbols
CHECK-NEXT: ============================================================ CHECK-NEXT: ============================================================
CHECK-NEXT: Records CHECK-NEXT: Records
CHECK-NEXT: 340 | S_UDT [size = 20] `HelloPoint` CHECK-NEXT: 444 | S_UDT [size = 20] `HelloPoint`
CHECK-NEXT: original type = 0x1007 CHECK-NEXT: original type = 0x1007
CHECK-NEXT: 208 | S_LPROCREF [size = 24] `LocalFunc` CHECK-NEXT: 240 | S_LPROCREF [size = 24] `LocalFunc`
CHECK-NEXT: module = 1, sum name = 0, offset = 292 CHECK-NEXT: module = 1, sum name = 0, offset = 424
CHECK-NEXT: 160 | S_PROCREF [size = 28] `GlobalFunc` CHECK-NEXT: 192 | S_PROCREF [size = 28] `GlobalFunc`
CHECK-NEXT: module = 1, sum name = 0, offset = 52 CHECK-NEXT: module = 1, sum name = 0, offset = 136
CHECK-NEXT: 188 | S_PROCREF [size = 20] `main` CHECK-NEXT: 220 | S_PROCREF [size = 20] `main`
CHECK-NEXT: module = 1, sum name = 0, offset = 108 CHECK-NEXT: module = 1, sum name = 0, offset = 224
CHECK-NEXT: 232 | S_GDATA32 [size = 28] `__purecall` CHECK-NEXT: 340 | S_CONSTANT [size = 24] `ConstexprVar`
CHECK-NEXT: type = 0x100B (const int), value = 18
CHECK-NEXT: 264 | S_GDATA32 [size = 28] `__purecall`
CHECK-NEXT: type = 0x0403 (void*), addr = 0003:0004 CHECK-NEXT: type = 0x0403 (void*), addr = 0003:0004
CHECK-NEXT: 260 | S_GDATA32 [size = 24] `GlobalVar` CHECK-NEXT: 292 | S_GDATA32 [size = 24] `GlobalVar`
CHECK-NEXT: type = 0x100B (const int*), addr = 0003:0000 CHECK-NEXT: type = 0x100C (const int*), addr = 0003:0000
CHECK-NEXT: 312 | S_UDT [size = 28] `HelloPointTypedef` CHECK-NEXT: 316 | S_GTHREAD32 [size = 24] `GlobalTLS`
CHECK-NEXT: original type = 0x1005 CHECK-NEXT: type = 0x0074 (int), addr = 0004:0000
CHECK-NEXT: 284 | S_LDATA32 [size = 28] `ConstantVar` CHECK-NEXT: 392 | S_LTHREAD32 [size = 24] `StaticTLS`
CHECK-NEXT: type = 0x100A (const int), addr = 0002:0000 CHECK-NEXT: type = 0x0074 (int), addr = 0004:0004
CHECK-NEXT: 360 | S_PROCREF [size = 40] `HelloPoint::HelloPoint` CHECK-NEXT: 416 | S_UDT [size = 28] `HelloPointTypedef`
CHECK-NEXT: module = 1, sum name = 0, offset = 376 CHECK-NEXT: original type = 0x1007
CHECK-NEXT: 364 | S_LDATA32 [size = 28] `ConstantVar`
CHECK-NEXT: type = 0x100B (const int), addr = 0002:0000
CHECK-NEXT: 464 | S_PROCREF [size = 40] `HelloPoint::HelloPoint`
CHECK-NEXT: module = 1, sum name = 0, offset = 572
CHECK-LABEL: Symbols CHECK-LABEL: Symbols
CHECK-NEXT: ============================================================ CHECK-NEXT: ============================================================
CHECK-NEXT: Mod 0000 CHECK-NEXT: Mod 0000
CHECK-NOT: | S_GDATA32 CHECK-NOT: | S_GDATA32
CHECK-NOT: | S_UDT CHECK-NOT: | S_UDT
CHECK: 52 | S_GPROC32 [size = 52] `GlobalFunc` CHECK-NOT: | S_GTHREAD32
CHECK: 108 | S_GPROC32 [size = 44] `main` CHECK: 136 | S_GPROC32 [size = 52] `GlobalFunc`
CHECK: 292 | S_LPROC32 [size = 52] `LocalFunc` CHECK: 224 | S_GPROC32 [size = 44] `main`
CHECK: 348 | S_LDATA32 [size = 28] `ConstantVar` CHECK: 424 | S_LPROC32 [size = 52] `LocalFunc`
CHECK: 376 | S_GPROC32 [size = 64] `HelloPoint::HelloPoint` CHECK: 512 | S_LDATA32 [size = 28] `ConstantVar`
CHECK: 540 | S_LTHREAD32 [size = 24] `StaticTLS`
CHECK: 572 | S_GPROC32 [size = 64] `HelloPoint::HelloPoint`