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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
809

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
41

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
808

Looks like we need to send S_LDATA32 to here.

lld/test/COFF/Inputs/pdb-globals.yaml
41

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
808

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

809

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
808

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

831

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/
3 lines
test/
COFF/
Inputs/
701 lines
57 lines

Diff 260628

lld/COFF/PDB.cpp

Show First 20 Lines • Show All 789 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:
default: default:
return true; return true;
} }
} }
static bool symbolGoesInGlobalsStream(const CVSymbol &sym, bool isGlobalScope) { static bool symbolGoesInGlobalsStream(const CVSymbol &sym, bool isGlobalScope) {
switch (sym.kind()) { switch (sym.kind()) {
case SymbolKind::S_CONSTANT: case SymbolKind::S_CONSTANT:
case SymbolKind::S_GDATA32: case SymbolKind::S_GDATA32:
case SymbolKind::S_GTHREAD32:
// S_LDATA32 goes in both the module stream and the globals stream. // S_LDATA32 goes in both the module stream and the globals stream.
case SymbolKind::S_LDATA32: 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. // S_UDT records go in the globals stream if it is a global S_UDT.
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; return isGlobalScope;
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_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 1,084 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 ThreadLocalVar = 254;
#
# 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 += ThreadLocalVar;
# 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_AMD64
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: B82B000000C3662E0F1F8400000000004883EC58C7442454000000004889542448894C2444488D4C2438E800000000448B442438448B4C243C4501C8448B4C24404501C844894424344889442428E80000000089442424E800000000448B4424244101C08B4424344401C089442434488B0D000000008B01448B4424344101C044894424348B44243483C012894424348B050000000089C165488B142558000000488B0CCA8B810000000003442434894424348B4424344883C458C30F1F4000B82A000000C3
Relocations: Relocations:
- VirtualAddress: 40 - VirtualAddress: 43
SymbolName: '??0HelloPoint@@QAE@XZ' SymbolName: '??0HelloPoint@@QEAA@XZ'
Type: IMAGE_REL_I386_REL32 Type: IMAGE_REL_AMD64_REL32
- VirtualAddress: 60 - VirtualAddress: 79
SymbolName: '?LocalFunc@@YAHXZ' SymbolName: '?LocalFunc@@YAHXZ'
Type: IMAGE_REL_I386_REL32 Type: IMAGE_REL_AMD64_REL32
- VirtualAddress: 68 - VirtualAddress: 88
SymbolName: '?GlobalFunc@@YAHXZ' SymbolName: '?GlobalFunc@@YAHXZ'
Type: IMAGE_REL_I386_REL32 Type: IMAGE_REL_AMD64_REL32
- VirtualAddress: 86 - VirtualAddress: 114
SymbolName: '?GlobalVar@@3PBHB' SymbolName: '?GlobalVar@@3PEBHEB'
Type: IMAGE_REL_I386_DIR32 Type: IMAGE_REL_AMD64_REL32
- VirtualAddress: 146
SymbolName: _tls_index
Type: IMAGE_REL_AMD64_REL32
- VirtualAddress: 167
SymbolName: '?ThreadLocalVar@@3HA'
Type: IMAGE_REL_AMD64_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: 8
SectionData: '00000000' SectionData: '0000000000000000'
Relocations: Relocations:
- VirtualAddress: 0 - VirtualAddress: 0
SymbolName: _ConstantVar SymbolName: ConstantVar
Type: IMAGE_REL_I386_DIR32 Type: IMAGE_REL_AMD64_ADDR64
- 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: 8
SectionData: '' SectionData: ''
SizeOfRawData: 4 SizeOfRawData: 8
- Name: .xdata
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ ]
Alignment: 4
SectionData: 0104010004A20000
- 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: 5048890C24488B0424C70003000000C7400404000000C740080500000059C3
- 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$'
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ]
Alignment: 4
SectionData: FE000000
- Name: .drectve - Name: .drectve
Characteristics: [ IMAGE_SCN_LNK_INFO, IMAGE_SCN_LNK_REMOVE ] Characteristics: [ IMAGE_SCN_LNK_INFO, IMAGE_SCN_LNK_REMOVE ]
Alignment: 1 Alignment: 1
SectionData: 202F44454641554C544C49423A6C6962636D742E6C6962202F44454641554C544C49423A6F6C646E616D65732E6C6962 SectionData: 202F44454641554C544C49423A6C6962636D742E6C6962202F44454641554C544C49423A6F6C646E616D65732E6C6962
- Name: '.debug$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
SectionData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ectionData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
Subsections: Subsections:
- !Symbols - !Symbols
Records: Records:
- Kind: S_COMPILE3 - Kind: S_COMPILE3
Compile3Sym: Compile3Sym:
Flags: [ ] Flags: [ ]
Machine: Pentium3 Machine: X64
FrontendMajor: 6 FrontendMajor: 11
FrontendMinor: 0 FrontendMinor: 0
FrontendBuild: 0 FrontendBuild: 0
FrontendQFE: 0 FrontendQFE: 0
BackendMajor: 6000 BackendMajor: 11000
BackendMinor: 0 BackendMinor: 0
BackendBuild: 0 BackendBuild: 0
BackendQFE: 0 BackendQFE: 0
Version: 'clang version 6.0.0 ' Version: 'clang version 11.0.0 (https://github.com/llvm/llvm-project.git f5b1301ce8575f6d82e87031a1a5485c33637a93)'
- !Symbols
Records:
- Kind: S_GPROC32_ID - Kind: S_GPROC32_ID
ProcSym: ProcSym:
CodeSize: 10 CodeSize: 6
DbgStart: 0 DbgStart: 0
DbgEnd: 0 DbgEnd: 0
FunctionType: 4098 FunctionType: 4098
Flags: [ ] Flags: [ ]
DisplayName: GlobalFunc DisplayName: GlobalFunc
- Kind: S_FRAMEPROC
FrameProcSym:
TotalFrameBytes: 0
PaddingFrameBytes: 0
OffsetToPadding: 0
BytesOfCalleeSavedRegisters: 0
OffsetOfExceptionHandler: 0
SectionIdOfExceptionHandler: 0
Flags: [ ]
- Kind: S_PROC_ID_END - Kind: S_PROC_ID_END
ScopeEndSym: ScopeEndSym: {}
- !Lines
CodeSize: 6
Flags: [ ]
RelocOffset: 0
RelocSegment: 0
Blocks:
- FileName: 'F:\llvm-project\__test\a.cpp'
Lines:
- Offset: 0
LineStart: 13
IsStatement: false
EndDelta: 0
Columns: []
- !Symbols
Records:
- Kind: S_GPROC32_ID - Kind: S_GPROC32_ID
ProcSym: ProcSym:
CodeSize: 98 CodeSize: 172
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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: 440 | 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: 252 | 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: 204 | 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: 232 | 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: 360 | S_CONSTANT [size = 24] `ConstexprVar`
CHECK-NEXT: type = 0x0403 (void*), addr = 0003:0004 CHECK-NEXT: type = 0x100B (const int), value = 18
CHECK-NEXT: 260 | S_GDATA32 [size = 24] `GlobalVar` CHECK-NEXT: 276 | S_GDATA32 [size = 28] `__purecall`
CHECK-NEXT: type = 0x100B (const int*), addr = 0003:0000 CHECK-NEXT: type = 0x0603 (void*), addr = 0003:0008
CHECK-NEXT: 312 | S_UDT [size = 28] `HelloPointTypedef` CHECK-NEXT: 304 | S_GDATA32 [size = 24] `GlobalVar`
CHECK-NEXT: original type = 0x1005 CHECK-NEXT: type = 0x100C (const int*), addr = 0003:0000
CHECK-NEXT: 284 | S_LDATA32 [size = 28] `ConstantVar` CHECK-NEXT: 412 | S_UDT [size = 28] `HelloPointTypedef`
CHECK-NEXT: type = 0x100A (const int), addr = 0002:0000 CHECK-NEXT: original type = 0x1007
CHECK-NEXT: 360 | S_PROCREF [size = 40] `HelloPoint::HelloPoint` CHECK-NEXT: 384 | S_LDATA32 [size = 28] `ConstantVar`
CHECK-NEXT: module = 1, sum name = 0, offset = 376 CHECK-NEXT: type = 0x100B (const int), addr = 0002:0000
CHECK-NEXT: 328 | S_GTHREAD32 [size = 32] `ThreadLocalVar`
CHECK-NEXT: type = 0x0074 (int), addr = 0005:0000
CHECK-NEXT: 460 | S_PROCREF [size = 40] `HelloPoint::HelloPoint`
CHECK-NEXT: module = 1, sum name = 0, offset = 548
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: 548 | S_GPROC32 [size = 64] `HelloPoint::HelloPoint`