711 lines
23 KiB
C++
711 lines
23 KiB
C++
//===-- asan_interceptors.cpp ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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// Intercept various libc functions.
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//===----------------------------------------------------------------------===//
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#include "asan_interceptors.h"
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#include "asan_allocator.h"
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#include "asan_internal.h"
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#include "asan_mapping.h"
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#include "asan_poisoning.h"
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#include "asan_report.h"
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#include "asan_stack.h"
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#include "asan_stats.h"
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#include "asan_suppressions.h"
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#include "lsan/lsan_common.h"
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#include "sanitizer_common/sanitizer_libc.h"
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// There is no general interception at all on Fuchsia.
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// Only the functions in asan_interceptors_memintrinsics.cpp are
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// really defined to replace libc functions.
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#if !SANITIZER_FUCHSIA
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# if SANITIZER_POSIX
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# include "sanitizer_common/sanitizer_posix.h"
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# endif
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# if ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION || \
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ASAN_INTERCEPT__SJLJ_UNWIND_RAISEEXCEPTION
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# include <unwind.h>
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# endif
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# if defined(__i386) && SANITIZER_LINUX
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# define ASAN_PTHREAD_CREATE_VERSION "GLIBC_2.1"
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# elif defined(__mips__) && SANITIZER_LINUX
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# define ASAN_PTHREAD_CREATE_VERSION "GLIBC_2.2"
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# endif
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namespace __asan {
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#define ASAN_READ_STRING_OF_LEN(ctx, s, len, n) \
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ASAN_READ_RANGE((ctx), (s), \
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common_flags()->strict_string_checks ? (len) + 1 : (n))
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# define ASAN_READ_STRING(ctx, s, n) \
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ASAN_READ_STRING_OF_LEN((ctx), (s), internal_strlen(s), (n))
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static inline uptr MaybeRealStrnlen(const char *s, uptr maxlen) {
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#if SANITIZER_INTERCEPT_STRNLEN
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if (REAL(strnlen)) {
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return REAL(strnlen)(s, maxlen);
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}
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#endif
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return internal_strnlen(s, maxlen);
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}
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void SetThreadName(const char *name) {
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AsanThread *t = GetCurrentThread();
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if (t)
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asanThreadRegistry().SetThreadName(t->tid(), name);
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}
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int OnExit() {
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if (CAN_SANITIZE_LEAKS && common_flags()->detect_leaks &&
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__lsan::HasReportedLeaks()) {
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return common_flags()->exitcode;
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}
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// FIXME: ask frontend whether we need to return failure.
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return 0;
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}
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} // namespace __asan
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// ---------------------- Wrappers ---------------- {{{1
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using namespace __asan;
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DECLARE_REAL_AND_INTERCEPTOR(void *, malloc, uptr)
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DECLARE_REAL_AND_INTERCEPTOR(void, free, void *)
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#define ASAN_INTERCEPTOR_ENTER(ctx, func) \
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AsanInterceptorContext _ctx = {#func}; \
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ctx = (void *)&_ctx; \
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(void) ctx; \
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#define COMMON_INTERCEPT_FUNCTION(name) ASAN_INTERCEPT_FUNC(name)
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#define COMMON_INTERCEPT_FUNCTION_VER(name, ver) \
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ASAN_INTERCEPT_FUNC_VER(name, ver)
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#define COMMON_INTERCEPT_FUNCTION_VER_UNVERSIONED_FALLBACK(name, ver) \
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ASAN_INTERCEPT_FUNC_VER_UNVERSIONED_FALLBACK(name, ver)
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#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
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ASAN_WRITE_RANGE(ctx, ptr, size)
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#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \
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ASAN_READ_RANGE(ctx, ptr, size)
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#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
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ASAN_INTERCEPTOR_ENTER(ctx, func); \
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do { \
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if (asan_init_is_running) \
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return REAL(func)(__VA_ARGS__); \
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if (SANITIZER_MAC && UNLIKELY(!asan_inited)) \
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return REAL(func)(__VA_ARGS__); \
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ENSURE_ASAN_INITED(); \
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} while (false)
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#define COMMON_INTERCEPTOR_DIR_ACQUIRE(ctx, path) \
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do { \
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} while (false)
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#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \
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do { \
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} while (false)
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#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \
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do { \
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} while (false)
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#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \
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do { \
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} while (false)
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#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) SetThreadName(name)
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// Should be asanThreadRegistry().SetThreadNameByUserId(thread, name)
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// But asan does not remember UserId's for threads (pthread_t);
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// and remembers all ever existed threads, so the linear search by UserId
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// can be slow.
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#define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name) \
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do { \
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} while (false)
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#define COMMON_INTERCEPTOR_BLOCK_REAL(name) REAL(name)
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// Strict init-order checking is dlopen-hostile:
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// https://github.com/google/sanitizers/issues/178
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#define COMMON_INTERCEPTOR_ON_DLOPEN(filename, flag) \
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do { \
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if (flags()->strict_init_order) \
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StopInitOrderChecking(); \
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CheckNoDeepBind(filename, flag); \
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} while (false)
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#define COMMON_INTERCEPTOR_ON_EXIT(ctx) OnExit()
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#define COMMON_INTERCEPTOR_LIBRARY_LOADED(filename, handle)
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#define COMMON_INTERCEPTOR_LIBRARY_UNLOADED()
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#define COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED (!asan_inited)
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#define COMMON_INTERCEPTOR_GET_TLS_RANGE(begin, end) \
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if (AsanThread *t = GetCurrentThread()) { \
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*begin = t->tls_begin(); \
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*end = t->tls_end(); \
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} else { \
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*begin = *end = 0; \
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}
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#define COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, to, from, size) \
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do { \
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ASAN_INTERCEPTOR_ENTER(ctx, memmove); \
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ASAN_MEMMOVE_IMPL(ctx, to, from, size); \
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} while (false)
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#define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, to, from, size) \
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do { \
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ASAN_INTERCEPTOR_ENTER(ctx, memcpy); \
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ASAN_MEMCPY_IMPL(ctx, to, from, size); \
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} while (false)
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#define COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, block, c, size) \
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do { \
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ASAN_INTERCEPTOR_ENTER(ctx, memset); \
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ASAN_MEMSET_IMPL(ctx, block, c, size); \
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} while (false)
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#if CAN_SANITIZE_LEAKS
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#define COMMON_INTERCEPTOR_STRERROR() \
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__lsan::ScopedInterceptorDisabler disabler
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#endif
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#include "sanitizer_common/sanitizer_common_interceptors.inc"
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#include "sanitizer_common/sanitizer_signal_interceptors.inc"
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// Syscall interceptors don't have contexts, we don't support suppressions
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// for them.
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#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) ASAN_READ_RANGE(nullptr, p, s)
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#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) ASAN_WRITE_RANGE(nullptr, p, s)
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#define COMMON_SYSCALL_POST_READ_RANGE(p, s) \
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do { \
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(void)(p); \
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(void)(s); \
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} while (false)
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#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) \
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do { \
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(void)(p); \
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(void)(s); \
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} while (false)
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#include "sanitizer_common/sanitizer_common_syscalls.inc"
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#include "sanitizer_common/sanitizer_syscalls_netbsd.inc"
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#if ASAN_INTERCEPT_PTHREAD_CREATE
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static thread_return_t THREAD_CALLING_CONV asan_thread_start(void *arg) {
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AsanThread *t = (AsanThread *)arg;
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SetCurrentThread(t);
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return t->ThreadStart(GetTid());
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}
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INTERCEPTOR(int, pthread_create, void *thread,
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void *attr, void *(*start_routine)(void*), void *arg) {
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EnsureMainThreadIDIsCorrect();
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// Strict init-order checking is thread-hostile.
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if (flags()->strict_init_order)
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StopInitOrderChecking();
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GET_STACK_TRACE_THREAD;
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int detached = 0;
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if (attr)
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REAL(pthread_attr_getdetachstate)(attr, &detached);
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u32 current_tid = GetCurrentTidOrInvalid();
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AsanThread *t =
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AsanThread::Create(start_routine, arg, current_tid, &stack, detached);
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int result;
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{
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// Ignore all allocations made by pthread_create: thread stack/TLS may be
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// stored by pthread for future reuse even after thread destruction, and
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// the linked list it's stored in doesn't even hold valid pointers to the
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// objects, the latter are calculated by obscure pointer arithmetic.
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#if CAN_SANITIZE_LEAKS
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__lsan::ScopedInterceptorDisabler disabler;
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#endif
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result = REAL(pthread_create)(thread, attr, asan_thread_start, t);
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}
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if (result != 0) {
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// If the thread didn't start delete the AsanThread to avoid leaking it.
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// Note AsanThreadContexts never get destroyed so the AsanThreadContext
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// that was just created for the AsanThread is wasted.
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t->Destroy();
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}
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return result;
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}
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INTERCEPTOR(int, pthread_join, void *t, void **arg) {
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return real_pthread_join(t, arg);
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}
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DEFINE_REAL_PTHREAD_FUNCTIONS
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#endif // ASAN_INTERCEPT_PTHREAD_CREATE
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#if ASAN_INTERCEPT_SWAPCONTEXT
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static void ClearShadowMemoryForContextStack(uptr stack, uptr ssize) {
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// Align to page size.
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uptr PageSize = GetPageSizeCached();
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uptr bottom = stack & ~(PageSize - 1);
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ssize += stack - bottom;
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ssize = RoundUpTo(ssize, PageSize);
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static const uptr kMaxSaneContextStackSize = 1 << 22; // 4 Mb
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if (AddrIsInMem(bottom) && ssize && ssize <= kMaxSaneContextStackSize) {
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PoisonShadow(bottom, ssize, 0);
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}
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}
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INTERCEPTOR(int, swapcontext, struct ucontext_t *oucp,
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struct ucontext_t *ucp) {
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static bool reported_warning = false;
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if (!reported_warning) {
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Report("WARNING: ASan doesn't fully support makecontext/swapcontext "
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"functions and may produce false positives in some cases!\n");
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reported_warning = true;
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}
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// Clear shadow memory for new context (it may share stack
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// with current context).
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uptr stack, ssize;
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ReadContextStack(ucp, &stack, &ssize);
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ClearShadowMemoryForContextStack(stack, ssize);
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#if __has_attribute(__indirect_return__) && \
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(defined(__x86_64__) || defined(__i386__))
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int (*real_swapcontext)(struct ucontext_t *, struct ucontext_t *)
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__attribute__((__indirect_return__))
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= REAL(swapcontext);
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int res = real_swapcontext(oucp, ucp);
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#else
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int res = REAL(swapcontext)(oucp, ucp);
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#endif
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// swapcontext technically does not return, but program may swap context to
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// "oucp" later, that would look as if swapcontext() returned 0.
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// We need to clear shadow for ucp once again, as it may be in arbitrary
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// state.
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ClearShadowMemoryForContextStack(stack, ssize);
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return res;
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}
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#endif // ASAN_INTERCEPT_SWAPCONTEXT
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#if SANITIZER_NETBSD
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#define longjmp __longjmp14
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#define siglongjmp __siglongjmp14
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#endif
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INTERCEPTOR(void, longjmp, void *env, int val) {
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__asan_handle_no_return();
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REAL(longjmp)(env, val);
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}
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#if ASAN_INTERCEPT__LONGJMP
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INTERCEPTOR(void, _longjmp, void *env, int val) {
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__asan_handle_no_return();
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REAL(_longjmp)(env, val);
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}
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#endif
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#if ASAN_INTERCEPT___LONGJMP_CHK
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INTERCEPTOR(void, __longjmp_chk, void *env, int val) {
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__asan_handle_no_return();
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REAL(__longjmp_chk)(env, val);
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}
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#endif
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#if ASAN_INTERCEPT_SIGLONGJMP
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INTERCEPTOR(void, siglongjmp, void *env, int val) {
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__asan_handle_no_return();
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REAL(siglongjmp)(env, val);
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}
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#endif
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#if ASAN_INTERCEPT___CXA_THROW
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INTERCEPTOR(void, __cxa_throw, void *a, void *b, void *c) {
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CHECK(REAL(__cxa_throw));
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__asan_handle_no_return();
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REAL(__cxa_throw)(a, b, c);
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}
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#endif
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#if ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION
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INTERCEPTOR(void, __cxa_rethrow_primary_exception, void *a) {
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CHECK(REAL(__cxa_rethrow_primary_exception));
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__asan_handle_no_return();
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REAL(__cxa_rethrow_primary_exception)(a);
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}
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#endif
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#if ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION
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INTERCEPTOR(_Unwind_Reason_Code, _Unwind_RaiseException,
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_Unwind_Exception *object) {
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CHECK(REAL(_Unwind_RaiseException));
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__asan_handle_no_return();
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return REAL(_Unwind_RaiseException)(object);
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}
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#endif
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#if ASAN_INTERCEPT__SJLJ_UNWIND_RAISEEXCEPTION
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INTERCEPTOR(_Unwind_Reason_Code, _Unwind_SjLj_RaiseException,
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_Unwind_Exception *object) {
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CHECK(REAL(_Unwind_SjLj_RaiseException));
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__asan_handle_no_return();
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return REAL(_Unwind_SjLj_RaiseException)(object);
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}
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#endif
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#if ASAN_INTERCEPT_INDEX
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# if ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX
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INTERCEPTOR(char*, index, const char *string, int c)
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ALIAS(WRAPPER_NAME(strchr));
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# else
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# if SANITIZER_MAC
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DECLARE_REAL(char*, index, const char *string, int c)
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OVERRIDE_FUNCTION(index, strchr);
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# else
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DEFINE_REAL(char*, index, const char *string, int c)
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# endif
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# endif
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#endif // ASAN_INTERCEPT_INDEX
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// For both strcat() and strncat() we need to check the validity of |to|
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// argument irrespective of the |from| length.
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INTERCEPTOR(char *, strcat, char *to, const char *from) {
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void *ctx;
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ASAN_INTERCEPTOR_ENTER(ctx, strcat);
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ENSURE_ASAN_INITED();
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if (flags()->replace_str) {
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uptr from_length = internal_strlen(from);
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ASAN_READ_RANGE(ctx, from, from_length + 1);
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uptr to_length = internal_strlen(to);
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ASAN_READ_STRING_OF_LEN(ctx, to, to_length, to_length);
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ASAN_WRITE_RANGE(ctx, to + to_length, from_length + 1);
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// If the copying actually happens, the |from| string should not overlap
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// with the resulting string starting at |to|, which has a length of
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// to_length + from_length + 1.
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if (from_length > 0) {
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CHECK_RANGES_OVERLAP("strcat", to, from_length + to_length + 1, from,
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from_length + 1);
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}
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}
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return REAL(strcat)(to, from);
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}
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INTERCEPTOR(char*, strncat, char *to, const char *from, uptr size) {
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void *ctx;
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ASAN_INTERCEPTOR_ENTER(ctx, strncat);
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ENSURE_ASAN_INITED();
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if (flags()->replace_str) {
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uptr from_length = MaybeRealStrnlen(from, size);
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uptr copy_length = Min(size, from_length + 1);
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ASAN_READ_RANGE(ctx, from, copy_length);
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uptr to_length = internal_strlen(to);
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ASAN_READ_STRING_OF_LEN(ctx, to, to_length, to_length);
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ASAN_WRITE_RANGE(ctx, to + to_length, from_length + 1);
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if (from_length > 0) {
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CHECK_RANGES_OVERLAP("strncat", to, to_length + copy_length + 1,
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from, copy_length);
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}
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}
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return REAL(strncat)(to, from, size);
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}
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INTERCEPTOR(char *, strcpy, char *to, const char *from) {
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void *ctx;
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ASAN_INTERCEPTOR_ENTER(ctx, strcpy);
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#if SANITIZER_MAC
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if (UNLIKELY(!asan_inited))
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return REAL(strcpy)(to, from);
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#endif
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// strcpy is called from malloc_default_purgeable_zone()
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// in __asan::ReplaceSystemAlloc() on Mac.
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if (asan_init_is_running) {
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return REAL(strcpy)(to, from);
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}
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ENSURE_ASAN_INITED();
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if (flags()->replace_str) {
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uptr from_size = internal_strlen(from) + 1;
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CHECK_RANGES_OVERLAP("strcpy", to, from_size, from, from_size);
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ASAN_READ_RANGE(ctx, from, from_size);
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ASAN_WRITE_RANGE(ctx, to, from_size);
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}
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return REAL(strcpy)(to, from);
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}
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INTERCEPTOR(char*, strdup, const char *s) {
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void *ctx;
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ASAN_INTERCEPTOR_ENTER(ctx, strdup);
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if (UNLIKELY(!asan_inited)) return internal_strdup(s);
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ENSURE_ASAN_INITED();
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uptr length = internal_strlen(s);
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if (flags()->replace_str) {
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ASAN_READ_RANGE(ctx, s, length + 1);
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}
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GET_STACK_TRACE_MALLOC;
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void *new_mem = asan_malloc(length + 1, &stack);
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REAL(memcpy)(new_mem, s, length + 1);
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return reinterpret_cast<char*>(new_mem);
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}
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#if ASAN_INTERCEPT___STRDUP
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INTERCEPTOR(char*, __strdup, const char *s) {
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void *ctx;
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ASAN_INTERCEPTOR_ENTER(ctx, strdup);
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if (UNLIKELY(!asan_inited)) return internal_strdup(s);
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ENSURE_ASAN_INITED();
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uptr length = internal_strlen(s);
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if (flags()->replace_str) {
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ASAN_READ_RANGE(ctx, s, length + 1);
|
|
}
|
|
GET_STACK_TRACE_MALLOC;
|
|
void *new_mem = asan_malloc(length + 1, &stack);
|
|
REAL(memcpy)(new_mem, s, length + 1);
|
|
return reinterpret_cast<char*>(new_mem);
|
|
}
|
|
#endif // ASAN_INTERCEPT___STRDUP
|
|
|
|
INTERCEPTOR(char*, strncpy, char *to, const char *from, uptr size) {
|
|
void *ctx;
|
|
ASAN_INTERCEPTOR_ENTER(ctx, strncpy);
|
|
ENSURE_ASAN_INITED();
|
|
if (flags()->replace_str) {
|
|
uptr from_size = Min(size, MaybeRealStrnlen(from, size) + 1);
|
|
CHECK_RANGES_OVERLAP("strncpy", to, from_size, from, from_size);
|
|
ASAN_READ_RANGE(ctx, from, from_size);
|
|
ASAN_WRITE_RANGE(ctx, to, size);
|
|
}
|
|
return REAL(strncpy)(to, from, size);
|
|
}
|
|
|
|
INTERCEPTOR(long, strtol, const char *nptr, char **endptr, int base) {
|
|
void *ctx;
|
|
ASAN_INTERCEPTOR_ENTER(ctx, strtol);
|
|
ENSURE_ASAN_INITED();
|
|
if (!flags()->replace_str) {
|
|
return REAL(strtol)(nptr, endptr, base);
|
|
}
|
|
char *real_endptr;
|
|
long result = REAL(strtol)(nptr, &real_endptr, base);
|
|
StrtolFixAndCheck(ctx, nptr, endptr, real_endptr, base);
|
|
return result;
|
|
}
|
|
|
|
INTERCEPTOR(int, atoi, const char *nptr) {
|
|
void *ctx;
|
|
ASAN_INTERCEPTOR_ENTER(ctx, atoi);
|
|
#if SANITIZER_MAC
|
|
if (UNLIKELY(!asan_inited)) return REAL(atoi)(nptr);
|
|
#endif
|
|
ENSURE_ASAN_INITED();
|
|
if (!flags()->replace_str) {
|
|
return REAL(atoi)(nptr);
|
|
}
|
|
char *real_endptr;
|
|
// "man atoi" tells that behavior of atoi(nptr) is the same as
|
|
// strtol(nptr, 0, 10), i.e. it sets errno to ERANGE if the
|
|
// parsed integer can't be stored in *long* type (even if it's
|
|
// different from int). So, we just imitate this behavior.
|
|
int result = REAL(strtol)(nptr, &real_endptr, 10);
|
|
FixRealStrtolEndptr(nptr, &real_endptr);
|
|
ASAN_READ_STRING(ctx, nptr, (real_endptr - nptr) + 1);
|
|
return result;
|
|
}
|
|
|
|
INTERCEPTOR(long, atol, const char *nptr) {
|
|
void *ctx;
|
|
ASAN_INTERCEPTOR_ENTER(ctx, atol);
|
|
#if SANITIZER_MAC
|
|
if (UNLIKELY(!asan_inited)) return REAL(atol)(nptr);
|
|
#endif
|
|
ENSURE_ASAN_INITED();
|
|
if (!flags()->replace_str) {
|
|
return REAL(atol)(nptr);
|
|
}
|
|
char *real_endptr;
|
|
long result = REAL(strtol)(nptr, &real_endptr, 10);
|
|
FixRealStrtolEndptr(nptr, &real_endptr);
|
|
ASAN_READ_STRING(ctx, nptr, (real_endptr - nptr) + 1);
|
|
return result;
|
|
}
|
|
|
|
#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL
|
|
INTERCEPTOR(long long, strtoll, const char *nptr, char **endptr, int base) {
|
|
void *ctx;
|
|
ASAN_INTERCEPTOR_ENTER(ctx, strtoll);
|
|
ENSURE_ASAN_INITED();
|
|
if (!flags()->replace_str) {
|
|
return REAL(strtoll)(nptr, endptr, base);
|
|
}
|
|
char *real_endptr;
|
|
long long result = REAL(strtoll)(nptr, &real_endptr, base);
|
|
StrtolFixAndCheck(ctx, nptr, endptr, real_endptr, base);
|
|
return result;
|
|
}
|
|
|
|
INTERCEPTOR(long long, atoll, const char *nptr) {
|
|
void *ctx;
|
|
ASAN_INTERCEPTOR_ENTER(ctx, atoll);
|
|
ENSURE_ASAN_INITED();
|
|
if (!flags()->replace_str) {
|
|
return REAL(atoll)(nptr);
|
|
}
|
|
char *real_endptr;
|
|
long long result = REAL(strtoll)(nptr, &real_endptr, 10);
|
|
FixRealStrtolEndptr(nptr, &real_endptr);
|
|
ASAN_READ_STRING(ctx, nptr, (real_endptr - nptr) + 1);
|
|
return result;
|
|
}
|
|
#endif // ASAN_INTERCEPT_ATOLL_AND_STRTOLL
|
|
|
|
#if ASAN_INTERCEPT___CXA_ATEXIT || ASAN_INTERCEPT_ATEXIT
|
|
static void AtCxaAtexit(void *unused) {
|
|
(void)unused;
|
|
StopInitOrderChecking();
|
|
}
|
|
#endif
|
|
|
|
#if ASAN_INTERCEPT___CXA_ATEXIT
|
|
INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg,
|
|
void *dso_handle) {
|
|
#if SANITIZER_MAC
|
|
if (UNLIKELY(!asan_inited)) return REAL(__cxa_atexit)(func, arg, dso_handle);
|
|
#endif
|
|
ENSURE_ASAN_INITED();
|
|
#if CAN_SANITIZE_LEAKS
|
|
__lsan::ScopedInterceptorDisabler disabler;
|
|
#endif
|
|
int res = REAL(__cxa_atexit)(func, arg, dso_handle);
|
|
REAL(__cxa_atexit)(AtCxaAtexit, nullptr, nullptr);
|
|
return res;
|
|
}
|
|
#endif // ASAN_INTERCEPT___CXA_ATEXIT
|
|
|
|
#if ASAN_INTERCEPT_ATEXIT
|
|
INTERCEPTOR(int, atexit, void (*func)()) {
|
|
ENSURE_ASAN_INITED();
|
|
#if CAN_SANITIZE_LEAKS
|
|
__lsan::ScopedInterceptorDisabler disabler;
|
|
#endif
|
|
// Avoid calling real atexit as it is unreachable on at least on Linux.
|
|
int res = REAL(__cxa_atexit)((void (*)(void *a))func, nullptr, nullptr);
|
|
REAL(__cxa_atexit)(AtCxaAtexit, nullptr, nullptr);
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
#if ASAN_INTERCEPT_PTHREAD_ATFORK
|
|
extern "C" {
|
|
extern int _pthread_atfork(void (*prepare)(), void (*parent)(),
|
|
void (*child)());
|
|
};
|
|
|
|
INTERCEPTOR(int, pthread_atfork, void (*prepare)(), void (*parent)(),
|
|
void (*child)()) {
|
|
#if CAN_SANITIZE_LEAKS
|
|
__lsan::ScopedInterceptorDisabler disabler;
|
|
#endif
|
|
// REAL(pthread_atfork) cannot be called due to symbol indirections at least
|
|
// on NetBSD
|
|
return _pthread_atfork(prepare, parent, child);
|
|
}
|
|
#endif
|
|
|
|
#if ASAN_INTERCEPT_VFORK
|
|
DEFINE_REAL(int, vfork)
|
|
DECLARE_EXTERN_INTERCEPTOR_AND_WRAPPER(int, vfork)
|
|
#endif
|
|
|
|
// ---------------------- InitializeAsanInterceptors ---------------- {{{1
|
|
namespace __asan {
|
|
void InitializeAsanInterceptors() {
|
|
static bool was_called_once;
|
|
CHECK(!was_called_once);
|
|
was_called_once = true;
|
|
InitializeCommonInterceptors();
|
|
InitializeSignalInterceptors();
|
|
|
|
// Intercept str* functions.
|
|
ASAN_INTERCEPT_FUNC(strcat);
|
|
ASAN_INTERCEPT_FUNC(strcpy);
|
|
ASAN_INTERCEPT_FUNC(strncat);
|
|
ASAN_INTERCEPT_FUNC(strncpy);
|
|
ASAN_INTERCEPT_FUNC(strdup);
|
|
#if ASAN_INTERCEPT___STRDUP
|
|
ASAN_INTERCEPT_FUNC(__strdup);
|
|
#endif
|
|
#if ASAN_INTERCEPT_INDEX && ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX
|
|
ASAN_INTERCEPT_FUNC(index);
|
|
#endif
|
|
|
|
ASAN_INTERCEPT_FUNC(atoi);
|
|
ASAN_INTERCEPT_FUNC(atol);
|
|
ASAN_INTERCEPT_FUNC(strtol);
|
|
#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL
|
|
ASAN_INTERCEPT_FUNC(atoll);
|
|
ASAN_INTERCEPT_FUNC(strtoll);
|
|
#endif
|
|
|
|
// Intecept jump-related functions.
|
|
ASAN_INTERCEPT_FUNC(longjmp);
|
|
|
|
#if ASAN_INTERCEPT_SWAPCONTEXT
|
|
ASAN_INTERCEPT_FUNC(swapcontext);
|
|
#endif
|
|
#if ASAN_INTERCEPT__LONGJMP
|
|
ASAN_INTERCEPT_FUNC(_longjmp);
|
|
#endif
|
|
#if ASAN_INTERCEPT___LONGJMP_CHK
|
|
ASAN_INTERCEPT_FUNC(__longjmp_chk);
|
|
#endif
|
|
#if ASAN_INTERCEPT_SIGLONGJMP
|
|
ASAN_INTERCEPT_FUNC(siglongjmp);
|
|
#endif
|
|
|
|
// Intercept exception handling functions.
|
|
#if ASAN_INTERCEPT___CXA_THROW
|
|
ASAN_INTERCEPT_FUNC(__cxa_throw);
|
|
#endif
|
|
#if ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION
|
|
ASAN_INTERCEPT_FUNC(__cxa_rethrow_primary_exception);
|
|
#endif
|
|
// Indirectly intercept std::rethrow_exception.
|
|
#if ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION
|
|
INTERCEPT_FUNCTION(_Unwind_RaiseException);
|
|
#endif
|
|
// Indirectly intercept std::rethrow_exception.
|
|
#if ASAN_INTERCEPT__UNWIND_SJLJ_RAISEEXCEPTION
|
|
INTERCEPT_FUNCTION(_Unwind_SjLj_RaiseException);
|
|
#endif
|
|
|
|
// Intercept threading-related functions
|
|
#if ASAN_INTERCEPT_PTHREAD_CREATE
|
|
// TODO: this should probably have an unversioned fallback for newer arches?
|
|
#if defined(ASAN_PTHREAD_CREATE_VERSION)
|
|
ASAN_INTERCEPT_FUNC_VER(pthread_create, ASAN_PTHREAD_CREATE_VERSION);
|
|
#else
|
|
ASAN_INTERCEPT_FUNC(pthread_create);
|
|
#endif
|
|
ASAN_INTERCEPT_FUNC(pthread_join);
|
|
#endif
|
|
|
|
// Intercept atexit function.
|
|
#if ASAN_INTERCEPT___CXA_ATEXIT
|
|
ASAN_INTERCEPT_FUNC(__cxa_atexit);
|
|
#endif
|
|
|
|
#if ASAN_INTERCEPT_ATEXIT
|
|
ASAN_INTERCEPT_FUNC(atexit);
|
|
#endif
|
|
|
|
#if ASAN_INTERCEPT_PTHREAD_ATFORK
|
|
ASAN_INTERCEPT_FUNC(pthread_atfork);
|
|
#endif
|
|
|
|
#if ASAN_INTERCEPT_VFORK
|
|
ASAN_INTERCEPT_FUNC(vfork);
|
|
#endif
|
|
|
|
InitializePlatformInterceptors();
|
|
|
|
VReport(1, "AddressSanitizer: libc interceptors initialized\n");
|
|
}
|
|
|
|
} // namespace __asan
|
|
|
|
#endif // !SANITIZER_FUCHSIA
|