diff options
Diffstat (limited to 'lib/asan/asan_errors.cc')
| -rw-r--r-- | lib/asan/asan_errors.cc | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/asan/asan_errors.cc b/lib/asan/asan_errors.cc index c287ba1b4be6..57490ad180b5 100644 --- a/lib/asan/asan_errors.cc +++ b/lib/asan/asan_errors.cc @@ -58,10 +58,22 @@ static void MaybeDumpRegisters(void *context) { SignalContext::DumpAllRegisters(context); } +static void MaybeReportNonExecRegion(uptr pc) { +#if SANITIZER_FREEBSD || SANITIZER_LINUX + MemoryMappingLayout proc_maps(/*cache_enabled*/ true); + uptr start, end, protection; + while (proc_maps.Next(&start, &end, nullptr, nullptr, 0, &protection)) { + if (pc >= start && pc < end && + !(protection & MemoryMappingLayout::kProtectionExecute)) + Report("Hint: PC is at a non-executable region. Maybe a wild jump?\n"); + } +#endif +} + void ErrorDeadlySignal::Print() { Decorator d; Printf("%s", d.Warning()); - const char *description = DescribeSignalOrException(signo); + const char *description = __sanitizer::DescribeSignalOrException(signo); Report( "ERROR: AddressSanitizer: %s on unknown address %p (pc %p bp %p sp %p " "T%d)\n", @@ -77,6 +89,7 @@ void ErrorDeadlySignal::Print() { if (addr < GetPageSizeCached()) Report("Hint: address points to the zero page.\n"); } + MaybeReportNonExecRegion(pc); scariness.Print(); BufferedStackTrace stack; GetStackTraceWithPcBpAndContext(&stack, kStackTraceMax, pc, bp, context, |