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Merge "Stop fp unwinding if the pc is 0." into main am: 0b27d314d6 am: 94df76e5ed am: e013c439b8

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Original change: https://android-review.googlesource.com/c/platform/bionic/+/2813433

Change-Id: Iaef76f9c61b7a645343ed407747ca2edef72565c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Christopher Ferris 2023-11-01 21:32:30 +00:00 committed by Automerger Merge Worker
commit abe2b20309
1 changed files with 5 additions and 1 deletions
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6
libc/bionic/android_unsafe_frame_pointer_chase.cpp
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@ -82,7 +82,11 @@ __attribute__((no_sanitize("address", "hwaddress"))) size_t android_unsafe_frame
auto* frame = reinterpret_cast<frame_record*>(begin); auto* frame = reinterpret_cast<frame_record*>(begin);
#endif #endif
if (num_frames < num_entries) { if (num_frames < num_entries) {
buf[num_frames] = __bionic_clear_pac_bits(frame->return_addr); uintptr_t addr = __bionic_clear_pac_bits(frame->return_addr);
if (addr == 0) {
break;
}
buf[num_frames] = addr;
} }
++num_frames; ++num_frames;
if (frame->next_frame < begin + sizeof(frame_record) || frame->next_frame >= end || if (frame->next_frame < begin + sizeof(frame_record) || frame->next_frame >= end ||