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[asan] Implement address sanitizer on AIX: address descriptions (#138891)

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Adapt address description logic for AIX. 

Issue: https://github.com/llvm/llvm-project/issues/138916
This commit is contained in:
Jake Egan
2025-06-25 11:18:15 -04:00
committed by GitHub
parent ea1e181571
commit 287b24e189
1 changed files with 14 additions and 8 deletions
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22
compiler-rt/lib/asan/asan_descriptions.cpp
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@@ -211,10 +211,10 @@ bool GetStackAddressInformation(uptr addr, uptr access_size,
descr->frame_pc = access.frame_pc;
descr->frame_descr = access.frame_descr;
#if SANITIZER_PPC64V1
// On PowerPC64 ELFv1, the address of a function actually points to a
// three-doubleword data structure with the first field containing
// the address of the function's code.
#if SANITIZER_PPC64V1 || SANITIZER_AIX
// On PowerPC64 ELFv1 or AIX, the address of a function actually points to a
// three-doubleword (or three-word for 32-bit AIX) data structure with
// the first field containing the address of the function's code.
descr->frame_pc = *reinterpret_cast<uptr *>(descr->frame_pc);
#endif
descr->frame_pc += 16;
@@ -444,6 +444,16 @@ AddressDescription::AddressDescription(uptr addr, uptr access_size,
data.kind = kAddressKindShadow;
return;
}
// Check global first. On AIX, some global data defined in shared libraries
// are put to the STACK region for unknown reasons. Check global first can
// workaround this issue.
// TODO: Look into whether there's a different solution to this problem.
if (GetGlobalAddressInformation(addr, access_size, &data.global)) {
data.kind = kAddressKindGlobal;
return;
}
if (GetHeapAddressInformation(addr, access_size, &data.heap)) {
data.kind = kAddressKindHeap;
return;
@@ -461,10 +471,6 @@ AddressDescription::AddressDescription(uptr addr, uptr access_size,
return;
}
if (GetGlobalAddressInformation(addr, access_size, &data.global)) {
data.kind = kAddressKindGlobal;
return;
}
data.kind = kAddressKindWild;
data.wild.addr = addr;
data.wild.access_size = access_size;