2012-06-04 21:50:10 +08:00
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//===-- asan_rtl.cc -------------------------------------------------------===//
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2011-11-30 09:07:02 +08:00
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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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// Main file of the ASan run-time library.
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//===----------------------------------------------------------------------===//
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#include "asan_allocator.h"
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#include "asan_interceptors.h"
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#include "asan_internal.h"
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#include "asan_mapping.h"
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2013-03-28 23:42:43 +08:00
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#include "asan_poisoning.h"
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2012-08-09 17:06:52 +08:00
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#include "asan_report.h"
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2011-11-30 09:07:02 +08:00
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#include "asan_stack.h"
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#include "asan_stats.h"
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#include "asan_thread.h"
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2012-06-30 00:58:33 +08:00
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#include "sanitizer_common/sanitizer_atomic.h"
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2012-07-09 22:36:04 +08:00
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#include "sanitizer_common/sanitizer_flags.h"
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2012-06-05 15:25:47 +08:00
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#include "sanitizer_common/sanitizer_libc.h"
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2012-08-23 15:32:06 +08:00
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#include "sanitizer_common/sanitizer_symbolizer.h"
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2013-05-21 22:15:35 +08:00
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#include "lsan/lsan_common.h"
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2011-11-30 09:07:02 +08:00
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2012-09-11 17:44:48 +08:00
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namespace __asan {
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2012-06-06 15:02:44 +08:00
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[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
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uptr AsanMappingProfile[kAsanMappingProfileSize];
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2012-09-11 17:44:48 +08:00
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static void AsanDie() {
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2012-06-30 00:58:33 +08:00
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static atomic_uint32_t num_calls;
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if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) {
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2012-06-06 15:02:44 +08:00
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// Don't die twice - run a busy loop.
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while (1) { }
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}
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2012-07-09 22:36:04 +08:00
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if (flags()->sleep_before_dying) {
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2012-08-06 21:00:21 +08:00
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Report("Sleeping for %d second(s)\n", flags()->sleep_before_dying);
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2012-07-09 22:36:04 +08:00
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SleepForSeconds(flags()->sleep_before_dying);
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2012-06-06 15:02:44 +08:00
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}
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[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
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if (flags()->unmap_shadow_on_exit) {
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if (kMidMemBeg) {
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UnmapOrDie((void*)kLowShadowBeg, kMidMemBeg - kLowShadowBeg);
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UnmapOrDie((void*)kMidMemEnd, kHighShadowEnd - kMidMemEnd);
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} else {
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UnmapOrDie((void*)kLowShadowBeg, kHighShadowEnd - kLowShadowBeg);
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}
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}
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2012-06-06 15:02:44 +08:00
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if (death_callback)
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death_callback();
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2012-07-09 22:36:04 +08:00
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if (flags()->abort_on_error)
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2012-06-06 15:02:44 +08:00
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Abort();
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2013-02-20 21:54:32 +08:00
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internal__exit(flags()->exitcode);
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2012-06-06 15:02:44 +08:00
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}
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2012-09-11 17:44:48 +08:00
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static void AsanCheckFailed(const char *file, int line, const char *cond,
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u64 v1, u64 v2) {
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2012-08-28 19:34:40 +08:00
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Report("AddressSanitizer CHECK failed: %s:%d \"%s\" (0x%zx, 0x%zx)\n",
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2012-06-06 23:22:20 +08:00
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file, line, cond, (uptr)v1, (uptr)v2);
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2012-09-07 23:50:19 +08:00
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// FIXME: check for infinite recursion without a thread-local counter here.
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2012-06-06 23:22:20 +08:00
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PRINT_CURRENT_STACK();
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2012-12-13 19:09:26 +08:00
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Die();
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2012-06-06 23:22:20 +08:00
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}
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2011-11-30 09:07:02 +08:00
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// -------------------------- Flags ------------------------- {{{1
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2013-04-16 22:58:45 +08:00
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static const int kDefaultMallocContextSize = 30;
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2012-05-29 00:21:19 +08:00
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2013-04-12 02:36:04 +08:00
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Flags asan_flags_dont_use_directly; // use via flags().
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2012-07-09 22:36:04 +08:00
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2012-12-08 06:01:28 +08:00
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static const char *MaybeCallAsanDefaultOptions() {
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return (&__asan_default_options) ? __asan_default_options() : "";
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}
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2013-02-19 21:14:48 +08:00
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static const char *MaybeUseAsanDefaultOptionsCompileDefiniton() {
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#ifdef ASAN_DEFAULT_OPTIONS
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// Stringize the macro value.
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# define ASAN_STRINGIZE(x) #x
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# define ASAN_STRINGIZE_OPTIONS(options) ASAN_STRINGIZE(options)
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return ASAN_STRINGIZE_OPTIONS(ASAN_DEFAULT_OPTIONS);
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#else
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return "";
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#endif
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}
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2012-07-09 22:36:04 +08:00
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static void ParseFlagsFromString(Flags *f, const char *str) {
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2013-05-06 19:27:58 +08:00
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ParseCommonFlagsFromString(str);
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CHECK((uptr)common_flags()->malloc_context_size <= kStackTraceMax);
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2012-07-09 22:36:04 +08:00
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ParseFlag(str, &f->quarantine_size, "quarantine_size");
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ParseFlag(str, &f->verbosity, "verbosity");
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ParseFlag(str, &f->redzone, "redzone");
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2013-04-05 22:40:25 +08:00
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CHECK_GE(f->redzone, 16);
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2012-07-09 22:36:04 +08:00
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CHECK(IsPowerOfTwo(f->redzone));
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ParseFlag(str, &f->debug, "debug");
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ParseFlag(str, &f->report_globals, "report_globals");
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2013-03-28 17:11:20 +08:00
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ParseFlag(str, &f->check_initialization_order, "check_initialization_order");
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2012-07-09 22:36:04 +08:00
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ParseFlag(str, &f->replace_str, "replace_str");
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ParseFlag(str, &f->replace_intrin, "replace_intrin");
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ParseFlag(str, &f->mac_ignore_invalid_free, "mac_ignore_invalid_free");
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ParseFlag(str, &f->use_fake_stack, "use_fake_stack");
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ParseFlag(str, &f->max_malloc_fill_size, "max_malloc_fill_size");
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2013-04-04 19:17:14 +08:00
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ParseFlag(str, &f->malloc_fill_byte, "malloc_fill_byte");
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2012-07-09 22:36:04 +08:00
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ParseFlag(str, &f->exitcode, "exitcode");
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ParseFlag(str, &f->allow_user_poisoning, "allow_user_poisoning");
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ParseFlag(str, &f->sleep_before_dying, "sleep_before_dying");
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ParseFlag(str, &f->handle_segv, "handle_segv");
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2013-04-25 18:52:15 +08:00
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ParseFlag(str, &f->allow_user_segv_handler, "allow_user_segv_handler");
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2012-07-09 22:36:04 +08:00
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ParseFlag(str, &f->use_sigaltstack, "use_sigaltstack");
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ParseFlag(str, &f->check_malloc_usable_size, "check_malloc_usable_size");
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ParseFlag(str, &f->unmap_shadow_on_exit, "unmap_shadow_on_exit");
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ParseFlag(str, &f->abort_on_error, "abort_on_error");
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2013-01-28 15:34:22 +08:00
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ParseFlag(str, &f->print_stats, "print_stats");
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ParseFlag(str, &f->print_legend, "print_legend");
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2012-07-09 22:36:04 +08:00
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ParseFlag(str, &f->atexit, "atexit");
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ParseFlag(str, &f->disable_core, "disable_core");
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2012-08-24 17:22:05 +08:00
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ParseFlag(str, &f->allow_reexec, "allow_reexec");
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2012-09-05 15:37:15 +08:00
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ParseFlag(str, &f->print_full_thread_history, "print_full_thread_history");
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2012-12-20 19:54:21 +08:00
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ParseFlag(str, &f->poison_heap, "poison_heap");
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2012-12-21 16:53:59 +08:00
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ParseFlag(str, &f->alloc_dealloc_mismatch, "alloc_dealloc_mismatch");
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2012-12-26 14:30:02 +08:00
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ParseFlag(str, &f->use_stack_depot, "use_stack_depot");
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2013-02-28 22:09:30 +08:00
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ParseFlag(str, &f->strict_memcmp, "strict_memcmp");
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2013-04-19 16:35:16 +08:00
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ParseFlag(str, &f->strict_init_order, "strict_init_order");
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2013-05-21 22:15:35 +08:00
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ParseFlag(str, &f->detect_leaks, "detect_leaks");
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2012-07-09 22:36:04 +08:00
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}
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void InitializeFlags(Flags *f, const char *env) {
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2013-05-06 19:27:58 +08:00
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CommonFlags *cf = common_flags();
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cf->external_symbolizer_path = GetEnv("ASAN_SYMBOLIZER_PATH");
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2013-05-16 21:04:29 +08:00
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cf->symbolize = true;
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2013-05-06 19:27:58 +08:00
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cf->malloc_context_size = kDefaultMallocContextSize;
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cf->fast_unwind_on_fatal = false;
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cf->fast_unwind_on_malloc = true;
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cf->strip_path_prefix = "";
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2013-06-07 21:00:47 +08:00
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cf->handle_ioctl = false;
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2013-06-25 21:50:44 +08:00
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cf->log_path = 0;
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2012-07-09 22:36:04 +08:00
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2013-05-06 19:27:58 +08:00
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internal_memset(f, 0, sizeof(*f));
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2012-09-07 20:13:52 +08:00
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f->quarantine_size = (ASAN_LOW_MEMORY) ? 1UL << 26 : 1UL << 28;
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2012-07-09 22:36:04 +08:00
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f->verbosity = 0;
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2013-04-04 19:32:49 +08:00
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f->redzone = 16;
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2012-07-10 15:41:27 +08:00
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f->debug = false;
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2012-07-09 22:36:04 +08:00
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f->report_globals = 1;
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2013-03-14 19:49:40 +08:00
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f->check_initialization_order = false;
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2012-07-09 22:36:04 +08:00
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f->replace_str = true;
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f->replace_intrin = true;
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2012-07-10 15:41:27 +08:00
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f->mac_ignore_invalid_free = false;
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2012-07-09 22:36:04 +08:00
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f->use_fake_stack = true;
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2013-04-04 19:17:14 +08:00
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f->max_malloc_fill_size = 0x1000; // By default, fill only the first 4K.
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f->malloc_fill_byte = 0xbe;
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2012-07-09 22:36:04 +08:00
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f->exitcode = ASAN_DEFAULT_FAILURE_EXITCODE;
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f->allow_user_poisoning = true;
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f->sleep_before_dying = 0;
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f->handle_segv = ASAN_NEEDS_SEGV;
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2013-04-25 18:52:15 +08:00
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f->allow_user_segv_handler = false;
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2012-07-09 22:36:04 +08:00
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f->use_sigaltstack = false;
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f->check_malloc_usable_size = true;
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f->unmap_shadow_on_exit = false;
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f->abort_on_error = false;
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2013-01-28 15:34:22 +08:00
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f->print_stats = false;
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f->print_legend = true;
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2012-07-09 22:36:04 +08:00
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f->atexit = false;
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2012-11-21 20:38:58 +08:00
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f->disable_core = (SANITIZER_WORDSIZE == 64);
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2012-08-24 17:22:05 +08:00
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f->allow_reexec = true;
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2012-09-05 15:37:15 +08:00
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f->print_full_thread_history = true;
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2012-12-20 19:54:21 +08:00
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f->poison_heap = true;
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2013-02-22 01:12:21 +08:00
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// Turn off alloc/dealloc mismatch checker on Mac for now.
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// TODO(glider): Fix known issues and enable this back.
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2013-03-19 21:54:41 +08:00
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f->alloc_dealloc_mismatch = (SANITIZER_MAC == 0);;
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2013-05-06 19:27:58 +08:00
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f->use_stack_depot = true;
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2013-02-28 22:09:30 +08:00
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f->strict_memcmp = true;
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2013-04-19 16:35:16 +08:00
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f->strict_init_order = false;
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2013-05-21 22:15:35 +08:00
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f->detect_leaks = false;
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2012-07-09 22:36:04 +08:00
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2013-02-19 21:14:48 +08:00
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// Override from compile definition.
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ParseFlagsFromString(f, MaybeUseAsanDefaultOptionsCompileDefiniton());
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2012-07-09 22:36:04 +08:00
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// Override from user-specified string.
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2012-12-08 06:01:28 +08:00
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ParseFlagsFromString(f, MaybeCallAsanDefaultOptions());
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2012-07-25 18:40:57 +08:00
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if (flags()->verbosity) {
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Report("Using the defaults from __asan_default_options: %s\n",
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2012-12-08 06:01:28 +08:00
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MaybeCallAsanDefaultOptions());
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2012-07-09 22:36:04 +08:00
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}
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// Override from command line.
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ParseFlagsFromString(f, env);
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2013-05-21 22:15:35 +08:00
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#if !CAN_SANITIZE_LEAKS
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if (f->detect_leaks) {
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Report("%s: detect_leaks is not supported on this platform.\n",
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SanitizerToolName);
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f->detect_leaks = false;
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}
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#endif
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if (f->detect_leaks && !f->use_stack_depot) {
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Report("%s: detect_leaks is ignored (requires use_stack_depot).\n",
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SanitizerToolName);
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f->detect_leaks = false;
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}
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2012-07-09 22:36:04 +08:00
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}
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2011-11-30 09:07:02 +08:00
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// -------------------------- Globals --------------------- {{{1
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int asan_inited;
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bool asan_init_is_running;
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2012-06-06 15:02:44 +08:00
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void (*death_callback)(void);
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[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
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|
|
|
|
|
#if !ASAN_FIXED_MAPPING
|
|
|
|
uptr kHighMemEnd, kMidMemBeg, kMidMemEnd;
|
|
|
|
#endif
|
2011-11-30 09:07:02 +08:00
|
|
|
|
|
|
|
// -------------------------- Misc ---------------- {{{1
|
|
|
|
void ShowStatsAndAbort() {
|
|
|
|
__asan_print_accumulated_stats();
|
2012-06-06 15:02:44 +08:00
|
|
|
Die();
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
// ---------------------- mmap -------------------- {{{1
|
2011-12-29 07:28:54 +08:00
|
|
|
// Reserve memory range [beg, end].
|
2012-05-31 22:35:53 +08:00
|
|
|
static void ReserveShadowMemoryRange(uptr beg, uptr end) {
|
2013-04-05 22:40:25 +08:00
|
|
|
CHECK_EQ((beg % GetPageSizeCached()), 0);
|
|
|
|
CHECK_EQ(((end + 1) % GetPageSizeCached()), 0);
|
2012-05-31 22:35:53 +08:00
|
|
|
uptr size = end - beg + 1;
|
2012-06-14 22:42:58 +08:00
|
|
|
void *res = MmapFixedNoReserve(beg, size);
|
2012-09-07 23:34:40 +08:00
|
|
|
if (res != (void*)beg) {
|
|
|
|
Report("ReserveShadowMemoryRange failed while trying to map 0x%zx bytes. "
|
|
|
|
"Perhaps you're using ulimit -v\n", size);
|
|
|
|
Abort();
|
|
|
|
}
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
|
2012-08-27 17:30:58 +08:00
|
|
|
// --------------- LowLevelAllocateCallbac ---------- {{{1
|
|
|
|
static void OnLowLevelAllocate(uptr ptr, uptr size) {
|
|
|
|
PoisonShadow(ptr, size, kAsanInternalHeapMagic);
|
2011-12-03 05:02:20 +08:00
|
|
|
}
|
|
|
|
|
2011-11-30 09:07:02 +08:00
|
|
|
// -------------------------- Run-time entry ------------------- {{{1
|
|
|
|
// exported functions
|
2011-12-28 08:59:39 +08:00
|
|
|
#define ASAN_REPORT_ERROR(type, is_write, size) \
|
2012-06-05 21:50:57 +08:00
|
|
|
extern "C" NOINLINE INTERFACE_ATTRIBUTE \
|
2012-05-31 22:35:53 +08:00
|
|
|
void __asan_report_ ## type ## size(uptr addr); \
|
|
|
|
void __asan_report_ ## type ## size(uptr addr) { \
|
2012-03-15 09:36:00 +08:00
|
|
|
GET_CALLER_PC_BP_SP; \
|
2011-12-28 08:59:39 +08:00
|
|
|
__asan_report_error(pc, bp, sp, addr, is_write, size); \
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
ASAN_REPORT_ERROR(load, false, 1)
|
|
|
|
ASAN_REPORT_ERROR(load, false, 2)
|
|
|
|
ASAN_REPORT_ERROR(load, false, 4)
|
|
|
|
ASAN_REPORT_ERROR(load, false, 8)
|
|
|
|
ASAN_REPORT_ERROR(load, false, 16)
|
|
|
|
ASAN_REPORT_ERROR(store, true, 1)
|
|
|
|
ASAN_REPORT_ERROR(store, true, 2)
|
|
|
|
ASAN_REPORT_ERROR(store, true, 4)
|
|
|
|
ASAN_REPORT_ERROR(store, true, 8)
|
|
|
|
ASAN_REPORT_ERROR(store, true, 16)
|
|
|
|
|
2013-02-19 19:30:25 +08:00
|
|
|
#define ASAN_REPORT_ERROR_N(type, is_write) \
|
|
|
|
extern "C" NOINLINE INTERFACE_ATTRIBUTE \
|
|
|
|
void __asan_report_ ## type ## _n(uptr addr, uptr size); \
|
|
|
|
void __asan_report_ ## type ## _n(uptr addr, uptr size) { \
|
|
|
|
GET_CALLER_PC_BP_SP; \
|
|
|
|
__asan_report_error(pc, bp, sp, addr, is_write, size); \
|
|
|
|
}
|
|
|
|
|
|
|
|
ASAN_REPORT_ERROR_N(load, false)
|
|
|
|
ASAN_REPORT_ERROR_N(store, true)
|
|
|
|
|
2011-11-30 09:07:02 +08:00
|
|
|
// Force the linker to keep the symbols for various ASan interface functions.
|
|
|
|
// We want to keep those in the executable in order to let the instrumented
|
|
|
|
// dynamic libraries access the symbol even if it is not used by the executable
|
|
|
|
// itself. This should help if the build system is removing dead code at link
|
|
|
|
// time.
|
2012-02-27 22:06:48 +08:00
|
|
|
static NOINLINE void force_interface_symbols() {
|
2011-11-30 09:07:02 +08:00
|
|
|
volatile int fake_condition = 0; // prevent dead condition elimination.
|
2012-08-09 17:46:12 +08:00
|
|
|
// __asan_report_* functions are noreturn, so we need a switch to prevent
|
|
|
|
// the compiler from removing any of them.
|
|
|
|
switch (fake_condition) {
|
|
|
|
case 1: __asan_report_load1(0); break;
|
|
|
|
case 2: __asan_report_load2(0); break;
|
|
|
|
case 3: __asan_report_load4(0); break;
|
|
|
|
case 4: __asan_report_load8(0); break;
|
|
|
|
case 5: __asan_report_load16(0); break;
|
|
|
|
case 6: __asan_report_store1(0); break;
|
|
|
|
case 7: __asan_report_store2(0); break;
|
|
|
|
case 8: __asan_report_store4(0); break;
|
|
|
|
case 9: __asan_report_store8(0); break;
|
|
|
|
case 10: __asan_report_store16(0); break;
|
|
|
|
case 12: __asan_register_globals(0, 0); break;
|
|
|
|
case 13: __asan_unregister_globals(0, 0); break;
|
|
|
|
case 14: __asan_set_death_callback(0); break;
|
|
|
|
case 15: __asan_set_error_report_callback(0); break;
|
|
|
|
case 16: __asan_handle_no_return(); break;
|
2012-08-10 00:05:17 +08:00
|
|
|
case 17: __asan_address_is_poisoned(0); break;
|
|
|
|
case 18: __asan_get_allocated_size(0); break;
|
|
|
|
case 19: __asan_get_current_allocated_bytes(); break;
|
|
|
|
case 20: __asan_get_estimated_allocated_size(0); break;
|
|
|
|
case 21: __asan_get_free_bytes(); break;
|
|
|
|
case 22: __asan_get_heap_size(); break;
|
|
|
|
case 23: __asan_get_ownership(0); break;
|
|
|
|
case 24: __asan_get_unmapped_bytes(); break;
|
|
|
|
case 25: __asan_poison_memory_region(0, 0); break;
|
|
|
|
case 26: __asan_unpoison_memory_region(0, 0); break;
|
|
|
|
case 27: __asan_set_error_exit_code(0); break;
|
|
|
|
case 28: __asan_stack_free(0, 0, 0); break;
|
|
|
|
case 29: __asan_stack_malloc(0, 0); break;
|
2013-03-26 21:06:12 +08:00
|
|
|
case 30: __asan_before_dynamic_init(0); break;
|
2012-12-08 06:01:28 +08:00
|
|
|
case 31: __asan_after_dynamic_init(); break;
|
|
|
|
case 32: __asan_poison_stack_memory(0, 0); break;
|
|
|
|
case 33: __asan_unpoison_stack_memory(0, 0); break;
|
2012-12-28 23:24:16 +08:00
|
|
|
case 34: __asan_region_is_poisoned(0, 0); break;
|
2012-12-29 18:18:31 +08:00
|
|
|
case 35: __asan_describe_address(0); break;
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void asan_atexit() {
|
2012-08-28 19:34:40 +08:00
|
|
|
Printf("AddressSanitizer exit stats:\n");
|
2011-11-30 09:07:02 +08:00
|
|
|
__asan_print_accumulated_stats();
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
// Print AsanMappingProfile.
|
|
|
|
for (uptr i = 0; i < kAsanMappingProfileSize; i++) {
|
|
|
|
if (AsanMappingProfile[i] == 0) continue;
|
|
|
|
Printf("asan_mapping.h:%zd -- %zd\n", i, AsanMappingProfile[i]);
|
|
|
|
}
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
|
2013-01-23 21:27:43 +08:00
|
|
|
static void InitializeHighMemEnd() {
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
#if !ASAN_FIXED_MAPPING
|
2013-01-23 21:27:43 +08:00
|
|
|
#if SANITIZER_WORDSIZE == 64
|
|
|
|
# if defined(__powerpc64__)
|
|
|
|
// FIXME:
|
|
|
|
// On PowerPC64 we have two different address space layouts: 44- and 46-bit.
|
|
|
|
// We somehow need to figure our which one we are using now and choose
|
|
|
|
// one of 0x00000fffffffffffUL and 0x00003fffffffffffUL.
|
|
|
|
// Note that with 'ulimit -s unlimited' the stack is moved away from the top
|
|
|
|
// of the address space, so simply checking the stack address is not enough.
|
|
|
|
kHighMemEnd = (1ULL << 44) - 1; // 0x00000fffffffffffUL
|
|
|
|
# else
|
|
|
|
kHighMemEnd = (1ULL << 47) - 1; // 0x00007fffffffffffUL;
|
|
|
|
# endif
|
|
|
|
#else // SANITIZER_WORDSIZE == 32
|
|
|
|
kHighMemEnd = (1ULL << 32) - 1; // 0xffffffff;
|
|
|
|
#endif // SANITIZER_WORDSIZE
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
#endif // !ASAN_FIXED_MAPPING
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ProtectGap(uptr a, uptr size) {
|
|
|
|
CHECK_EQ(a, (uptr)Mprotect(a, size));
|
|
|
|
}
|
|
|
|
|
|
|
|
static void PrintAddressSpaceLayout() {
|
|
|
|
Printf("|| `[%p, %p]` || HighMem ||\n",
|
|
|
|
(void*)kHighMemBeg, (void*)kHighMemEnd);
|
|
|
|
Printf("|| `[%p, %p]` || HighShadow ||\n",
|
|
|
|
(void*)kHighShadowBeg, (void*)kHighShadowEnd);
|
|
|
|
if (kMidMemBeg) {
|
|
|
|
Printf("|| `[%p, %p]` || ShadowGap3 ||\n",
|
|
|
|
(void*)kShadowGap3Beg, (void*)kShadowGap3End);
|
|
|
|
Printf("|| `[%p, %p]` || MidMem ||\n",
|
|
|
|
(void*)kMidMemBeg, (void*)kMidMemEnd);
|
|
|
|
Printf("|| `[%p, %p]` || ShadowGap2 ||\n",
|
|
|
|
(void*)kShadowGap2Beg, (void*)kShadowGap2End);
|
|
|
|
Printf("|| `[%p, %p]` || MidShadow ||\n",
|
|
|
|
(void*)kMidShadowBeg, (void*)kMidShadowEnd);
|
|
|
|
}
|
|
|
|
Printf("|| `[%p, %p]` || ShadowGap ||\n",
|
|
|
|
(void*)kShadowGapBeg, (void*)kShadowGapEnd);
|
|
|
|
if (kLowShadowBeg) {
|
|
|
|
Printf("|| `[%p, %p]` || LowShadow ||\n",
|
|
|
|
(void*)kLowShadowBeg, (void*)kLowShadowEnd);
|
|
|
|
Printf("|| `[%p, %p]` || LowMem ||\n",
|
|
|
|
(void*)kLowMemBeg, (void*)kLowMemEnd);
|
|
|
|
}
|
|
|
|
Printf("MemToShadow(shadow): %p %p %p %p",
|
|
|
|
(void*)MEM_TO_SHADOW(kLowShadowBeg),
|
|
|
|
(void*)MEM_TO_SHADOW(kLowShadowEnd),
|
|
|
|
(void*)MEM_TO_SHADOW(kHighShadowBeg),
|
|
|
|
(void*)MEM_TO_SHADOW(kHighShadowEnd));
|
|
|
|
if (kMidMemBeg) {
|
|
|
|
Printf(" %p %p",
|
|
|
|
(void*)MEM_TO_SHADOW(kMidShadowBeg),
|
|
|
|
(void*)MEM_TO_SHADOW(kMidShadowEnd));
|
|
|
|
}
|
|
|
|
Printf("\n");
|
|
|
|
Printf("red_zone=%zu\n", (uptr)flags()->redzone);
|
2013-05-06 19:27:58 +08:00
|
|
|
Printf("malloc_context_size=%zu\n",
|
|
|
|
(uptr)common_flags()->malloc_context_size);
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
|
|
|
|
Printf("SHADOW_SCALE: %zx\n", (uptr)SHADOW_SCALE);
|
|
|
|
Printf("SHADOW_GRANULARITY: %zx\n", (uptr)SHADOW_GRANULARITY);
|
|
|
|
Printf("SHADOW_OFFSET: %zx\n", (uptr)SHADOW_OFFSET);
|
|
|
|
CHECK(SHADOW_SCALE >= 3 && SHADOW_SCALE <= 7);
|
|
|
|
if (kMidMemBeg)
|
|
|
|
CHECK(kMidShadowBeg > kLowShadowEnd &&
|
|
|
|
kMidMemBeg > kMidShadowEnd &&
|
|
|
|
kHighShadowBeg > kMidMemEnd);
|
2013-01-23 21:27:43 +08:00
|
|
|
}
|
|
|
|
|
2011-11-30 09:07:02 +08:00
|
|
|
} // namespace __asan
|
|
|
|
|
2012-01-10 02:53:15 +08:00
|
|
|
// ---------------------- Interface ---------------- {{{1
|
2011-11-30 09:07:02 +08:00
|
|
|
using namespace __asan; // NOLINT
|
|
|
|
|
2012-12-08 06:01:28 +08:00
|
|
|
#if !SANITIZER_SUPPORTS_WEAK_HOOKS
|
|
|
|
extern "C" {
|
|
|
|
SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
|
|
|
|
const char* __asan_default_options() { return ""; }
|
|
|
|
} // extern "C"
|
|
|
|
#endif
|
|
|
|
|
2012-08-10 00:05:17 +08:00
|
|
|
int NOINLINE __asan_set_error_exit_code(int exit_code) {
|
2012-07-09 22:36:04 +08:00
|
|
|
int old = flags()->exitcode;
|
|
|
|
flags()->exitcode = exit_code;
|
2011-11-30 09:07:02 +08:00
|
|
|
return old;
|
|
|
|
}
|
|
|
|
|
2012-03-06 19:45:59 +08:00
|
|
|
void NOINLINE __asan_handle_no_return() {
|
2012-02-09 05:33:27 +08:00
|
|
|
int local_stack;
|
2013-03-20 17:23:28 +08:00
|
|
|
AsanThread *curr_thread = GetCurrentThread();
|
2012-02-09 05:33:27 +08:00
|
|
|
CHECK(curr_thread);
|
2012-11-23 23:38:49 +08:00
|
|
|
uptr PageSize = GetPageSizeCached();
|
2012-05-31 22:35:53 +08:00
|
|
|
uptr top = curr_thread->stack_top();
|
2012-11-23 23:38:49 +08:00
|
|
|
uptr bottom = ((uptr)&local_stack - PageSize) & ~(PageSize-1);
|
2013-05-22 16:54:30 +08:00
|
|
|
static const uptr kMaxExpectedCleanupSize = 64 << 20; // 64M
|
|
|
|
if (top - bottom > kMaxExpectedCleanupSize) {
|
|
|
|
static bool reported_warning = false;
|
|
|
|
if (reported_warning)
|
|
|
|
return;
|
|
|
|
reported_warning = true;
|
|
|
|
Report("WARNING: ASan is ignoring requested __asan_handle_no_return: "
|
|
|
|
"stack top: %p; bottom %p; size: %p (%zd)\n"
|
|
|
|
"False positive error reports may follow\n"
|
|
|
|
"For details see "
|
|
|
|
"http://code.google.com/p/address-sanitizer/issues/detail?id=189\n",
|
|
|
|
top, bottom, top - bottom, top - bottom);
|
|
|
|
return;
|
|
|
|
}
|
2012-02-09 05:33:27 +08:00
|
|
|
PoisonShadow(bottom, top - bottom, 0);
|
|
|
|
}
|
|
|
|
|
2012-03-01 22:39:21 +08:00
|
|
|
void NOINLINE __asan_set_death_callback(void (*callback)(void)) {
|
2012-02-14 05:24:29 +08:00
|
|
|
death_callback = callback;
|
|
|
|
}
|
|
|
|
|
2012-05-25 23:37:16 +08:00
|
|
|
void __asan_init() {
|
|
|
|
if (asan_inited) return;
|
2013-01-31 22:11:21 +08:00
|
|
|
SanitizerToolName = "AddressSanitizer";
|
2012-08-27 17:30:58 +08:00
|
|
|
CHECK(!asan_init_is_running && "ASan init calls itself!");
|
2012-05-25 23:37:16 +08:00
|
|
|
asan_init_is_running = true;
|
2013-01-23 21:27:43 +08:00
|
|
|
InitializeHighMemEnd();
|
2012-05-25 23:37:16 +08:00
|
|
|
|
|
|
|
// Make sure we are not statically linked.
|
|
|
|
AsanDoesNotSupportStaticLinkage();
|
|
|
|
|
2012-09-11 17:44:48 +08:00
|
|
|
// Install tool-specific callbacks in sanitizer_common.
|
|
|
|
SetDieCallback(AsanDie);
|
|
|
|
SetCheckFailedCallback(AsanCheckFailed);
|
2012-08-28 19:34:40 +08:00
|
|
|
SetPrintfAndReportCallback(AppendToErrorMessageBuffer);
|
|
|
|
|
2012-08-24 17:22:05 +08:00
|
|
|
// Initialize flags. This must be done early, because most of the
|
|
|
|
// initialization steps look at flags().
|
2012-06-14 22:07:21 +08:00
|
|
|
const char *options = GetEnv("ASAN_OPTIONS");
|
2012-07-09 22:36:04 +08:00
|
|
|
InitializeFlags(flags(), options);
|
2013-06-25 21:50:44 +08:00
|
|
|
__sanitizer_set_report_path(common_flags()->log_path);
|
2012-03-17 00:38:31 +08:00
|
|
|
|
2012-07-09 22:36:04 +08:00
|
|
|
if (flags()->verbosity && options) {
|
2012-03-17 00:38:31 +08:00
|
|
|
Report("Parsed ASAN_OPTIONS: %s\n", options);
|
|
|
|
}
|
|
|
|
|
2012-08-24 17:22:05 +08:00
|
|
|
// Re-exec ourselves if we need to set additional env or command line args.
|
|
|
|
MaybeReexec();
|
|
|
|
|
2012-08-27 22:04:54 +08:00
|
|
|
// Setup internal allocator callback.
|
|
|
|
SetLowLevelAllocateCallback(OnLowLevelAllocate);
|
|
|
|
|
2012-07-09 22:36:04 +08:00
|
|
|
if (flags()->atexit) {
|
2012-02-22 22:07:06 +08:00
|
|
|
Atexit(asan_atexit);
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
// interceptors
|
|
|
|
InitializeAsanInterceptors();
|
|
|
|
|
|
|
|
ReplaceSystemMalloc();
|
2012-04-06 16:21:08 +08:00
|
|
|
ReplaceOperatorsNewAndDelete();
|
2011-11-30 09:07:02 +08:00
|
|
|
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
uptr shadow_start = kLowShadowBeg;
|
|
|
|
if (kLowShadowBeg) shadow_start -= GetMmapGranularity();
|
|
|
|
uptr shadow_end = kHighShadowEnd;
|
|
|
|
bool full_shadow_is_available =
|
|
|
|
MemoryRangeIsAvailable(shadow_start, shadow_end);
|
|
|
|
|
2013-03-19 21:54:41 +08:00
|
|
|
#if SANITIZER_LINUX && defined(__x86_64__) && !ASAN_FIXED_MAPPING
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
if (!full_shadow_is_available) {
|
|
|
|
kMidMemBeg = kLowMemEnd < 0x3000000000ULL ? 0x3000000000ULL : 0;
|
2013-02-28 20:28:37 +08:00
|
|
|
kMidMemEnd = kLowMemEnd < 0x3000000000ULL ? 0x4fffffffffULL : 0;
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
#endif
|
|
|
|
|
|
|
|
if (flags()->verbosity)
|
|
|
|
PrintAddressSpaceLayout();
|
2011-11-30 09:07:02 +08:00
|
|
|
|
2012-07-09 22:36:04 +08:00
|
|
|
if (flags()->disable_core) {
|
2012-06-15 14:08:19 +08:00
|
|
|
DisableCoreDumper();
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
if (full_shadow_is_available) {
|
|
|
|
// mmap the low shadow plus at least one page at the left.
|
|
|
|
if (kLowShadowBeg)
|
|
|
|
ReserveShadowMemoryRange(shadow_start, kLowShadowEnd);
|
|
|
|
// mmap the high shadow.
|
|
|
|
ReserveShadowMemoryRange(kHighShadowBeg, kHighShadowEnd);
|
|
|
|
// protect the gap.
|
|
|
|
ProtectGap(kShadowGapBeg, kShadowGapEnd - kShadowGapBeg + 1);
|
|
|
|
} else if (kMidMemBeg &&
|
|
|
|
MemoryRangeIsAvailable(shadow_start, kMidMemBeg - 1) &&
|
|
|
|
MemoryRangeIsAvailable(kMidMemEnd + 1, shadow_end)) {
|
|
|
|
CHECK(kLowShadowBeg != kLowShadowEnd);
|
|
|
|
// mmap the low shadow plus at least one page at the left.
|
|
|
|
ReserveShadowMemoryRange(shadow_start, kLowShadowEnd);
|
|
|
|
// mmap the mid shadow.
|
|
|
|
ReserveShadowMemoryRange(kMidShadowBeg, kMidShadowEnd);
|
2012-01-10 03:18:27 +08:00
|
|
|
// mmap the high shadow.
|
|
|
|
ReserveShadowMemoryRange(kHighShadowBeg, kHighShadowEnd);
|
[asan] make asan work with 7fff8000 offset and prelink
When prelink is installed in the system, prelink-ed
libraries map between 0x003000000000 and 0x004000000000 thus occupying the shadow Gap,
so we need so split the address space even further, like this:
|| [0x10007fff8000, 0x7fffffffffff] || HighMem ||
|| [0x02008fff7000, 0x10007fff7fff] || HighShadow ||
|| [0x004000000000, 0x02008fff6fff] || ShadowGap3 ||
|| [0x003000000000, 0x003fffffffff] || MidMem ||
|| [0x00087fff8000, 0x002fffffffff] || ShadowGap2 ||
|| [0x00067fff8000, 0x00087fff7fff] || MidShadow ||
|| [0x00008fff7000, 0x00067fff7fff] || ShadowGap ||
|| [0x00007fff8000, 0x00008fff6fff] || LowShadow ||
|| [0x000000000000, 0x00007fff7fff] || LowMem ||
Do it only if necessary.
Also added a bit of profiling code to make sure that the
mapping code is efficient.
Added a lit test to simulate prelink-ed libraries.
Unfortunately, this test does not work with binutils-gold linker.
If gold is the default linker the test silently passes.
Also replaced
__has_feature(address_sanitizer)
with
__has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
in two places.
Patch partially by Jakub Jelinek.
llvm-svn: 175263
2013-02-15 20:00:24 +08:00
|
|
|
// protect the gaps.
|
|
|
|
ProtectGap(kShadowGapBeg, kShadowGapEnd - kShadowGapBeg + 1);
|
|
|
|
ProtectGap(kShadowGap2Beg, kShadowGap2End - kShadowGap2Beg + 1);
|
|
|
|
ProtectGap(kShadowGap3Beg, kShadowGap3End - kShadowGap3Beg + 1);
|
2012-02-13 23:11:23 +08:00
|
|
|
} else {
|
|
|
|
Report("Shadow memory range interleaves with an existing memory mapping. "
|
|
|
|
"ASan cannot proceed correctly. ABORTING.\n");
|
2012-06-15 14:08:19 +08:00
|
|
|
DumpProcessMap();
|
2012-06-06 15:02:44 +08:00
|
|
|
Die();
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
|
2012-04-05 18:54:52 +08:00
|
|
|
InstallSignalHandlers();
|
2013-06-11 16:13:36 +08:00
|
|
|
|
|
|
|
AsanTSDInit(AsanThread::TSDDtor);
|
|
|
|
// Allocator should be initialized before starting external symbolizer, as
|
|
|
|
// fork() on Mac locks the allocator.
|
|
|
|
InitializeAllocator();
|
|
|
|
|
2012-08-23 15:32:06 +08:00
|
|
|
// Start symbolizer process if necessary.
|
2013-05-06 19:27:58 +08:00
|
|
|
const char* external_symbolizer = common_flags()->external_symbolizer_path;
|
|
|
|
if (common_flags()->symbolize && external_symbolizer &&
|
|
|
|
external_symbolizer[0]) {
|
|
|
|
InitializeExternalSymbolizer(external_symbolizer);
|
2012-08-23 15:32:06 +08:00
|
|
|
}
|
2012-04-05 18:54:52 +08:00
|
|
|
|
2011-11-30 09:07:02 +08:00
|
|
|
// On Linux AsanThread::ThreadStart() calls malloc() that's why asan_inited
|
|
|
|
// should be set to 1 prior to initializing the threads.
|
|
|
|
asan_inited = 1;
|
|
|
|
asan_init_is_running = false;
|
|
|
|
|
2013-05-29 21:09:44 +08:00
|
|
|
InitTlsSize();
|
|
|
|
|
2013-03-21 19:23:41 +08:00
|
|
|
// Create main thread.
|
|
|
|
AsanThread *main_thread = AsanThread::Create(0, 0);
|
|
|
|
CreateThreadContextArgs create_main_args = { main_thread, 0 };
|
|
|
|
u32 main_tid = asanThreadRegistry().CreateThread(
|
|
|
|
0, true, 0, &create_main_args);
|
|
|
|
CHECK_EQ(0, main_tid);
|
|
|
|
SetCurrentThread(main_thread);
|
2013-05-18 00:56:53 +08:00
|
|
|
main_thread->ThreadStart(internal_getpid());
|
2011-12-28 08:59:39 +08:00
|
|
|
force_interface_symbols(); // no-op.
|
2011-11-30 09:07:02 +08:00
|
|
|
|
2013-05-22 21:20:37 +08:00
|
|
|
#if CAN_SANITIZE_LEAKS
|
2013-05-21 22:15:35 +08:00
|
|
|
__lsan::InitCommonLsan();
|
2013-05-22 01:56:45 +08:00
|
|
|
if (flags()->detect_leaks) {
|
|
|
|
Atexit(__lsan::DoLeakCheck);
|
|
|
|
}
|
2013-05-22 21:20:37 +08:00
|
|
|
#endif // CAN_SANITIZE_LEAKS
|
2013-05-21 22:15:35 +08:00
|
|
|
|
2012-07-09 22:36:04 +08:00
|
|
|
if (flags()->verbosity) {
|
2011-12-02 05:40:52 +08:00
|
|
|
Report("AddressSanitizer Init done\n");
|
2011-11-30 09:07:02 +08:00
|
|
|
}
|
|
|
|
}
|