1Consider this example program with an inline function "foo":
2
3==> foo.h <==
4extern int global;
5__inline void foo() {
6  ++global;
7}
8void bar();
9==> pdb_comdat_main.c <==
10#include "foo.h"
11int main(void) {
12  foo();
13  bar();
14  return 42;
15}
16==> pdb_comdat_bar.c <==
17#include "foo.h"
18void bar(void) {
19  foo();
20}
21
22Both object files will contain debug info for foo, but only the debug info from
23pdb_comdat_main.obj should be included in the PDB.
24
25RUN: rm -rf %t && mkdir -p %t && cd %t
26RUN: yaml2obj %S/Inputs/pdb_comdat_main.yaml -o pdb_comdat_main.obj
27RUN: yaml2obj %S/Inputs/pdb_comdat_bar.yaml -o pdb_comdat_bar.obj
28RUN: lld-link pdb_comdat_main.obj pdb_comdat_bar.obj -out:%t.exe -debug -pdb:%t.pdb -nodefaultlib -entry:main
29RUN: llvm-pdbutil dump -l -symbols -globals %t.pdb | FileCheck %s
30
31CHECK:                            Lines
32CHECK: ============================================================
33CHECK-LABEL:   Mod 0000 | `{{.*}}pdb_comdat_main.obj`:
34CHECK:       c:\src\llvm-project\build\pdb_comdat_main.c (MD5: F969E51BBE373436D81492EB61387F36)
35CHECK:       c:\src\llvm-project\build\foo.h (MD5: D74D834EFAC3AE2B45E606A8320B1D5C)
36CHECK-LABEL:   Mod 0001 | `{{.*}}pdb_comdat_bar.obj`:
37CHECK:       c:\src\llvm-project\build\pdb_comdat_bar.c (MD5: 365279DB4FCBEDD721BBFC3B14A953C2)
38CHECK-NOT:       c:\src\llvm-project\build\foo.h
39CHECK-LABEL:   Mod 0002 | `* Linker *`:
40
41CHECK-LABEL:                       Global Symbols
42CHECK-NEXT:  ============================================================
43CHECK-NEXT:    Records
44CHECK-NEXT:        84 | S_PROCREF [size = 20] `main`
45CHECK-NEXT:             module = 1, sum name = 0, offset = 120
46CHECK-NEXT:       148 | S_PROCREF [size = 20] `bar`
47CHECK-NEXT:             module = 2, sum name = 0, offset = 120
48CHECK-NEXT:       128 | S_PROCREF [size = 20] `foo`
49CHECK-NEXT:             module = 1, sum name = 0, offset = 208
50CHECK-NEXT:       104 | S_GDATA32 [size = 24] `global`
51CHECK-NEXT:             type = 0x0074 (int), addr = 0003:0000
52CHECK-NEXT:       168 | S_GDATA32 [size = 24] `global`
53CHECK-NEXT:             type = 0x0074 (int), addr = 0003:0000
54
55CHECK:                           Symbols
56CHECK: ============================================================
57CHECK-LABEL:   Mod 0000 | `{{.*}}pdb_comdat_main.obj`:
58CHECK:     4 | S_OBJNAME [size = 56] sig=0, `C:\src\llvm-project\build\pdb_comdat_main.obj`
59CHECK:    60 | S_COMPILE3 [size = 60]
60CHECK:         machine = intel x86-x64, Ver = Microsoft (R) Optimizing Compiler, language = c
61CHECK:         frontend = 19.0.24215.1, backend = 19.0.24215.1
62CHECK:         flags = security checks | hot patchable
63CHECK:   120 | S_GPROC32 [size = 44] `main`
64CHECK:         parent = 0, end = 196, addr = 0001:0000, code size = 24
65CHECK:         debug start = 4, debug end = 19, flags = none
66CHECK:   164 | S_FRAMEPROC [size = 32]
67CHECK:         size = 40, padding size = 0, offset to padding = 0
68CHECK:         bytes of callee saved registers = 0, exception handler addr = 0000:0000
69CHECK:         flags = has async eh | opt speed
70CHECK:   196 | S_END [size = 4]
71CHECK:   200 | S_BUILDINFO [size = 8] BuildId = `0x100A`
72CHECK:   208 | S_GPROC32 [size = 44] `foo`
73CHECK:         parent = 0, end = 284, addr = 0001:0032, code size = 15
74CHECK:         debug start = 0, debug end = 14, flags = none
75CHECK:   252 | S_FRAMEPROC [size = 32]
76CHECK:         size = 0, padding size = 0, offset to padding = 0
77CHECK:         bytes of callee saved registers = 0, exception handler addr = 0000:0000
78CHECK:         flags = marked inline | has async eh | opt speed
79CHECK:   284 | S_END [size = 4]
80CHECK-LABEL:   Mod 0001 | `{{.*}}pdb_comdat_bar.obj`:
81CHECK:     4 | S_OBJNAME [size = 56] sig=0, `C:\src\llvm-project\build\pdb_comdat_bar.obj`
82CHECK:    60 | S_COMPILE3 [size = 60]
83CHECK:       machine = intel x86-x64, Ver = Microsoft (R) Optimizing Compiler, language = c
84CHECK:       frontend = 19.0.24215.1, backend = 19.0.24215.1
85CHECK:       flags = security checks | hot patchable
86CHECK:   120 | S_GPROC32 [size = 44] `bar`
87CHECK:       parent = 0, end = 196, addr = 0001:0048, code size = 14
88CHECK:       debug start = 4, debug end = 9, flags = none
89CHECK:   164 | S_FRAMEPROC [size = 32]
90CHECK:       size = 40, padding size = 0, offset to padding = 0
91CHECK:       bytes of callee saved registers = 0, exception handler addr = 0000:0000
92CHECK:       flags = has async eh | opt speed
93CHECK:   196 | S_END [size = 4]
94CHECK:   200 | S_BUILDINFO [size = 8] BuildId = `0x100D`
95CHECK-NOT:   S_GPROC32 {{.*}} `foo`
96CHECK-LABEL:   Mod 0002 | `* Linker *`:
97
98Reorder the object files and verify that the other table is selected.
99
100RUN: lld-link pdb_comdat_bar.obj pdb_comdat_main.obj -out:t.exe -debug -pdb:t.pdb -nodefaultlib -entry:main
101RUN: llvm-pdbutil dump -l t.pdb | FileCheck %s --check-prefix=REORDER
102
103REORDER-LABEL:   Mod 0000 | `{{.*}}pdb_comdat_bar.obj`:
104REORDER:       c:\src\llvm-project\build\pdb_comdat_bar.c (MD5: 365279DB4FCBEDD721BBFC3B14A953C2)
105REORDER:       c:\src\llvm-project\build\foo.h (MD5: D74D834EFAC3AE2B45E606A8320B1D5C)
106REORDER-LABEL:   Mod 0001 | `{{.*}}pdb_comdat_main.obj`:
107REORDER:       c:\src\llvm-project\build\pdb_comdat_main.c
108REORDER-NOT:       c:\src\llvm-project\build\foo.h
109REORDER-LABEL:   Mod 0002 | `* Linker *`:
110
111Make sure that we don't crash on non-prevailing debug sections if -debug is not enabled.
112RUN: lld-link pdb_comdat_main.obj pdb_comdat_bar.obj -out:%t.exe -nodefaultlib -entry:main
113