diff options
| -rw-r--r-- | absl/debugging/internal/stacktrace_riscv-inl.inc | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/absl/debugging/internal/stacktrace_riscv-inl.inc b/absl/debugging/internal/stacktrace_riscv-inl.inc index 7123b71b..ba0775b2 100644 --- a/absl/debugging/internal/stacktrace_riscv-inl.inc +++ b/absl/debugging/internal/stacktrace_riscv-inl.inc @@ -159,6 +159,21 @@ static void ** NextStackFrame(void **old_frame_pointer, const void *uc) { const uintptr_t max_size = STRICT_UNWINDING ? 100000 : 1000000; const uintptr_t frame_size = ComputeStackFrameSize(old_frame_pointer, new_frame_pointer); + + // If we have a alternate signal stack, the stack pointer may not be + // contiguous. In such a case, we can simply skip the check and assume that + // the non-contiguity is permissible. + if (frame_size == kUnknownFrameSize) { + assert(old_frame_pointer >= new_frame_pointer); + + stack_t ss{}; + if (sigaltstack(nullptr, &ss) == 0) { + if (ss.ss_flags & SS_DISABLE) + return nullptr; + return new_frame_pointer; + } + } + if (frame_size == kUnknownFrameSize || frame_size > max_size) return nullptr; } |