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debuggerd: recognize jumps to non-executable memory.

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We have fairly fancy detection of stack pointer issues, but nothing for the program counter...

Bug: https://issuetracker.google.com/365602121
Change-Id: I7e7061a1b473089a0f31438df5ebc65b283475bc
This commit is contained in:
Elliott Hughes 2024-09-11 16:23:18 +00:00
parent 1024225b62
commit b17d7be2e5
1 changed files with 3 additions and 0 deletions
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3
debuggerd/libdebuggerd/tombstone_proto.cpp
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@ -356,6 +356,9 @@ static void dump_probable_cause(Tombstone* tombstone, unwindstack::AndroidUnwind
auto map_info = maps->Find(fault_addr);
if (map_info != nullptr && map_info->flags() == PROT_EXEC) {
cause = "execute-only (no-read) memory access error; likely due to data in .text.";
} else if (fault_addr == target_thread.registers->pc() &&
map_info != nullptr && (map_info->flags() & PROT_EXEC) == 0) {
cause = "trying to execute non-executable memory.";
} else {
cause = get_stack_overflow_cause(fault_addr, target_thread.registers->sp(), maps);
}