tree 671324d486fa0de9d36e29ba30ea4f16100659aa
parent e5dc1f86b2defc8f76b56fb473b804e42e75c41d
author Sim Sun <simsun@fb.com> 1713397945 -0700
committer Joshua Peraza <jperaza@chromium.org> 1713457158 +0000

Prefer to use .note.gnu.build-id section as ElfBuildId

Summary:
Android prefers `.note.gnu-build-id`[0] as BuildId than anyother PT_NOTE
phdrs. This CL tries to read ElfBuildId from `.note.gnu.build-id` first
to fix the BuildId mismatch issue between Android tombstone report and
breakpad symbol file.

e.g
```
Section Headers:
  [Nr] Name              Type             Address           Offset
       Size              EntSize          Flags  Link  Info  Align
  [ 0]                   NULL             0000000000000000  00000000
       0000000000000000  0000000000000000           0     0     0
  [ 1] .note.androi[...] NOTE             0000000000000270  00000270
       0000000000000018  0000000000000000   A       0     0     4
  [ 2] .note.hwasan[...] NOTE             0000000000000288  00000288
       000000000000001c  0000000000000000   A       0     0     4
  [ 3] .note.gnu.bu[...] NOTE             00000000000002a4  000002a4
       0000000000000020  0000000000000000   A       0     0     4

$ readelf -x .note.hwasan.globals
Hex dump of section '.note.hwasan.globals':
  0x00000288 08000000 08000000 03000000 4c4c564d ............LLVM
  0x00000298 00000000 98890100 409d0100          ........@...

$ readelf -x .note.gnu.build-id
Hex dump of section '.note.gnu.build-id':
  0x000002a4 04000000 10000000 03000000 474e5500 ............GNU.
  0x000002b4 a4eb3625 c1db6452 1e881973 bfdff9bd ..6%..dR...s....
```

The BuildId in tombstone:
```
libartbase.so (BuildId: c7e463b51b0898d442269a421353bdbd)
```

But the breakpad dump_syms got:
```
MODULE Linux arm64 000189989D40000100000000000000000 libartbase.so
INFO CODE_ID 98890100409D0100
`````

[0]
https://cs.android.com/android/platform/superproject/main/+/main:system/unwinding/libunwindstack/ElfInterface.cpp;l=423-427;drc=3d19fbcc09b1b44928639b06cd0b88f735cd988d

Change-Id: I01e3514e0e2a1ea163c03093055284448ed4e89c
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/5463566
Reviewed-by: Joshua Peraza <jperaza@chromium.org>