Consider this example program with an inline function "foo":
==> foo.h <==
extern int global;
__inline void foo() {
++global;
}
void bar();
==> pdb_comdat_main.c <==
#include "foo.h"
int main(void) {
foo();
bar();
return 42;
}
==> pdb_comdat_bar.c <==
#include "foo.h"
void bar(void) {
foo();
}
Both object files will contain debug info for foo, but only the debug info from
pdb_comdat_main.obj should be included in the PDB.
RUN: rm -rf %t && mkdir -p %t && cd %t
RUN: yaml2obj %S/Inputs/pdb_comdat_main.yaml -o pdb_comdat_main.obj
RUN: yaml2obj %S/Inputs/pdb_comdat_bar.yaml -o pdb_comdat_bar.obj
RUN: lld-link pdb_comdat_main.obj pdb_comdat_bar.obj -out:%t.exe -debug -pdb:%t.pdb -nodefaultlib -entry:main
RUN: llvm-pdbutil dump -l -symbols -globals %t.pdb | FileCheck %s
CHECK: Lines
CHECK: ============================================================
CHECK-LABEL: Mod 0000 | `{{.*}}pdb_comdat_main.obj`:
CHECK: c:\src\llvm-project\build\pdb_comdat_main.c (MD5: F969E51BBE373436D81492EB61387F36)
CHECK: c:\src\llvm-project\build\foo.h (MD5: D74D834EFAC3AE2B45E606A8320B1D5C)
CHECK-LABEL: Mod 0001 | `{{.*}}pdb_comdat_bar.obj`:
CHECK: c:\src\llvm-project\build\pdb_comdat_bar.c (MD5: 365279DB4FCBEDD721BBFC3B14A953C2)
CHECK-NOT: c:\src\llvm-project\build\foo.h
CHECK-LABEL: Mod 0002 | `* Linker *`:
CHECK-LABEL: Global Symbols
CHECK-NEXT: ============================================================
CHECK-NEXT: Records
CHECK-NEXT: 84 | S_PROCREF [size = 20] `main`
CHECK-NEXT: module = 1, sum name = 0, offset = 120
CHECK-NEXT: 148 | S_PROCREF [size = 20] `bar`
CHECK-NEXT: module = 2, sum name = 0, offset = 120
CHECK-NEXT: 128 | S_PROCREF [size = 20] `foo`
CHECK-NEXT: module = 1, sum name = 0, offset = 208
CHECK-NEXT: 104 | S_GDATA32 [size = 24] `global`
CHECK-NEXT: type = 0x0074 (int), addr = 0003:0000
CHECK-NEXT: 168 | S_GDATA32 [size = 24] `global`
CHECK-NEXT: type = 0x0074 (int), addr = 0003:0000
CHECK: Symbols
CHECK: ============================================================
CHECK-LABEL: Mod 0000 | `{{.*}}pdb_comdat_main.obj`:
CHECK: 4 | S_OBJNAME [size = 56] sig=0, `C:\src\llvm-project\build\pdb_comdat_main.obj`
CHECK: 60 | S_COMPILE3 [size = 60]
CHECK: machine = intel x86-x64, Ver = Microsoft (R) Optimizing Compiler, language = c
CHECK: frontend = 19.0.24215.1, backend = 19.0.24215.1
CHECK: flags = security checks | hot patchable
CHECK: 120 | S_GPROC32 [size = 44] `main`
CHECK: parent = 0, end = 196, addr = 0001:0000, code size = 24
CHECK: debug start = 4, debug end = 19, flags = none
CHECK: 164 | S_FRAMEPROC [size = 32]
CHECK: size = 40, padding size = 0, offset to padding = 0
CHECK: bytes of callee saved registers = 0, exception handler addr = 0000:0000
CHECK: flags = has async eh | opt speed
CHECK: 196 | S_END [size = 4]
CHECK: 200 | S_BUILDINFO [size = 8] BuildId = `0x100A`
CHECK: 208 | S_GPROC32 [size = 44] `foo`
CHECK: parent = 0, end = 284, addr = 0001:0032, code size = 15
CHECK: debug start = 0, debug end = 14, flags = none
CHECK: 252 | S_FRAMEPROC [size = 32]
CHECK: size = 0, padding size = 0, offset to padding = 0
CHECK: bytes of callee saved registers = 0, exception handler addr = 0000:0000
CHECK: flags = marked inline | has async eh | opt speed
CHECK: 284 | S_END [size = 4]
CHECK-LABEL: Mod 0001 | `{{.*}}pdb_comdat_bar.obj`:
CHECK: 4 | S_OBJNAME [size = 56] sig=0, `C:\src\llvm-project\build\pdb_comdat_bar.obj`
CHECK: 60 | S_COMPILE3 [size = 60]
CHECK: machine = intel x86-x64, Ver = Microsoft (R) Optimizing Compiler, language = c
CHECK: frontend = 19.0.24215.1, backend = 19.0.24215.1
CHECK: flags = security checks | hot patchable
CHECK: 120 | S_GPROC32 [size = 44] `bar`
CHECK: parent = 0, end = 196, addr = 0001:0048, code size = 14
CHECK: debug start = 4, debug end = 9, flags = none
CHECK: 164 | S_FRAMEPROC [size = 32]
CHECK: size = 40, padding size = 0, offset to padding = 0
CHECK: bytes of callee saved registers = 0, exception handler addr = 0000:0000
CHECK: flags = has async eh | opt speed
CHECK: 196 | S_END [size = 4]
CHECK: 200 | S_BUILDINFO [size = 8] BuildId = `0x100D`
CHECK-NOT: S_GPROC32 {{.*}} `foo`
CHECK-LABEL: Mod 0002 | `* Linker *`:
Reorder the object files and verify that the other table is selected.
RUN: lld-link pdb_comdat_bar.obj pdb_comdat_main.obj -out:t.exe -debug -pdb:t.pdb -nodefaultlib -entry:main
RUN: llvm-pdbutil dump -l t.pdb | FileCheck %s --check-prefix=REORDER
REORDER-LABEL: Mod 0000 | `{{.*}}pdb_comdat_bar.obj`:
REORDER: c:\src\llvm-project\build\pdb_comdat_bar.c (MD5: 365279DB4FCBEDD721BBFC3B14A953C2)
REORDER: c:\src\llvm-project\build\foo.h (MD5: D74D834EFAC3AE2B45E606A8320B1D5C)
REORDER-LABEL: Mod 0001 | `{{.*}}pdb_comdat_main.obj`:
REORDER: c:\src\llvm-project\build\pdb_comdat_main.c
REORDER-NOT: c:\src\llvm-project\build\foo.h
REORDER-LABEL: Mod 0002 | `* Linker *`:
Make sure that we don't crash on non-prevailing debug sections if -debug is not enabled.
RUN: lld-link pdb_comdat_main.obj pdb_comdat_bar.obj -out:%t.exe -nodefaultlib -entry:main
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