forked from OSchip/llvm-project
69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
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//===-- asan_linux.cc -----------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// Posix-specific details.
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//===----------------------------------------------------------------------===//
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#if defined(__linux__) || defined(__APPLE__)
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#include "asan_internal.h"
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#include "asan_interceptors.h"
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#include "asan_stack.h"
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#include "asan_thread_registry.h"
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#include <signal.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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namespace __asan {
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static void MaybeInstallSigaction(int signum,
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void (*handler)(int, siginfo_t *, void *)) {
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if (!AsanInterceptsSignal(signum))
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return;
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struct sigaction sigact;
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real_memset(&sigact, 0, sizeof(sigact));
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sigact.sa_sigaction = handler;
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sigact.sa_flags = SA_SIGINFO;
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CHECK(0 == real_sigaction(signum, &sigact, 0));
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}
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static void ASAN_OnSIGSEGV(int, siginfo_t *siginfo, void *context) {
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uintptr_t addr = (uintptr_t)siginfo->si_addr;
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// Write the first message using the bullet-proof write.
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if (13 != AsanWrite(2, "ASAN:SIGSEGV\n", 13)) ASAN_DIE;
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uintptr_t pc, sp, bp;
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GetPcSpBp(context, &pc, &sp, &bp);
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Report("ERROR: AddressSanitizer crashed on unknown address %p"
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" (pc %p sp %p bp %p T%d)\n",
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addr, pc, sp, bp,
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asanThreadRegistry().GetCurrentTidOrMinusOne());
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Printf("AddressSanitizer can not provide additional info. ABORTING\n");
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GET_STACK_TRACE_WITH_PC_AND_BP(kStackTraceMax, false, pc, bp);
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stack.PrintStack();
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ShowStatsAndAbort();
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}
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void InstallSignalHandlers() {
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MaybeInstallSigaction(SIGSEGV, ASAN_OnSIGSEGV);
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MaybeInstallSigaction(SIGBUS, ASAN_OnSIGSEGV);
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}
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void AsanDisableCoreDumper() {
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struct rlimit nocore;
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nocore.rlim_cur = 0;
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nocore.rlim_max = 0;
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setrlimit(RLIMIT_CORE, &nocore);
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}
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} // namespace __asan
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#endif // __linux__ || __APPLE_
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