| //===-- msan.cc -----------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of MemorySanitizer. |
| // |
| // MemorySanitizer runtime. |
| //===----------------------------------------------------------------------===// |
| |
| #include "msan.h" |
| #include "msan_chained_origin_depot.h" |
| #include "msan_origin.h" |
| #include "msan_thread.h" |
| #include "sanitizer_common/sanitizer_atomic.h" |
| #include "sanitizer_common/sanitizer_common.h" |
| #include "sanitizer_common/sanitizer_flags.h" |
| #include "sanitizer_common/sanitizer_libc.h" |
| #include "sanitizer_common/sanitizer_procmaps.h" |
| #include "sanitizer_common/sanitizer_stacktrace.h" |
| #include "sanitizer_common/sanitizer_symbolizer.h" |
| #include "sanitizer_common/sanitizer_stackdepot.h" |
| |
| |
| // ACHTUNG! No system header includes in this file. |
| |
| using namespace __sanitizer; |
| |
| // Globals. |
| static THREADLOCAL int msan_expect_umr = 0; |
| static THREADLOCAL int msan_expected_umr_found = 0; |
| |
| static bool msan_running_under_dr; |
| |
| // Function argument shadow. Each argument starts at the next available 8-byte |
| // aligned address. |
| SANITIZER_INTERFACE_ATTRIBUTE |
| THREADLOCAL u64 __msan_param_tls[kMsanParamTlsSizeInWords]; |
| |
| // Function argument origin. Each argument starts at the same offset as the |
| // corresponding shadow in (__msan_param_tls). Slightly weird, but changing this |
| // would break compatibility with older prebuilt binaries. |
| SANITIZER_INTERFACE_ATTRIBUTE |
| THREADLOCAL u32 __msan_param_origin_tls[kMsanParamTlsSizeInWords]; |
| |
| SANITIZER_INTERFACE_ATTRIBUTE |
| THREADLOCAL u64 __msan_retval_tls[kMsanRetvalTlsSizeInWords]; |
| |
| SANITIZER_INTERFACE_ATTRIBUTE |
| THREADLOCAL u32 __msan_retval_origin_tls; |
| |
| SANITIZER_INTERFACE_ATTRIBUTE |
| THREADLOCAL u64 __msan_va_arg_tls[kMsanParamTlsSizeInWords]; |
| |
| SANITIZER_INTERFACE_ATTRIBUTE |
| THREADLOCAL u64 __msan_va_arg_overflow_size_tls; |
| |
| SANITIZER_INTERFACE_ATTRIBUTE |
| THREADLOCAL u32 __msan_origin_tls; |
| |
| static THREADLOCAL int is_in_symbolizer; |
| static THREADLOCAL int is_in_loader; |
| |
| extern "C" SANITIZER_WEAK_ATTRIBUTE const int __msan_track_origins; |
| |
| int __msan_get_track_origins() { |
| return &__msan_track_origins ? __msan_track_origins : 0; |
| } |
| |
| extern "C" SANITIZER_WEAK_ATTRIBUTE const int __msan_keep_going; |
| |
| namespace __msan { |
| |
| void EnterSymbolizer() { ++is_in_symbolizer; } |
| void ExitSymbolizer() { --is_in_symbolizer; } |
| bool IsInSymbolizer() { return is_in_symbolizer; } |
| |
| void EnterLoader() { ++is_in_loader; } |
| void ExitLoader() { --is_in_loader; } |
| |
| extern "C" { |
| SANITIZER_INTERFACE_ATTRIBUTE |
| bool __msan_is_in_loader() { return is_in_loader; } |
| } |
| |
| static Flags msan_flags; |
| |
| Flags *flags() { |
| return &msan_flags; |
| } |
| |
| int msan_inited = 0; |
| bool msan_init_is_running; |
| |
| int msan_report_count = 0; |
| |
| void (*death_callback)(void); |
| |
| // Array of stack origins. |
| // FIXME: make it resizable. |
| static const uptr kNumStackOriginDescrs = 1024 * 1024; |
| static const char *StackOriginDescr[kNumStackOriginDescrs]; |
| static uptr StackOriginPC[kNumStackOriginDescrs]; |
| static atomic_uint32_t NumStackOriginDescrs; |
| |
| static void ParseFlagsFromString(Flags *f, const char *str) { |
| CommonFlags *cf = common_flags(); |
| ParseCommonFlagsFromString(cf, str); |
| ParseFlag(str, &f->poison_heap_with_zeroes, "poison_heap_with_zeroes", ""); |
| ParseFlag(str, &f->poison_stack_with_zeroes, "poison_stack_with_zeroes", ""); |
| ParseFlag(str, &f->poison_in_malloc, "poison_in_malloc", ""); |
| ParseFlag(str, &f->poison_in_free, "poison_in_free", ""); |
| ParseFlag(str, &f->exit_code, "exit_code", ""); |
| if (f->exit_code < 0 || f->exit_code > 127) { |
| Printf("Exit code not in [0, 128) range: %d\n", f->exit_code); |
| Die(); |
| } |
| ParseFlag(str, &f->origin_history_size, "origin_history_size", ""); |
| if (f->origin_history_size < 0 || |
| f->origin_history_size > Origin::kMaxDepth) { |
| Printf( |
| "Origin history size invalid: %d. Must be 0 (unlimited) or in [1, %d] " |
| "range.\n", |
| f->origin_history_size, Origin::kMaxDepth); |
| Die(); |
| } |
| ParseFlag(str, &f->origin_history_per_stack_limit, |
| "origin_history_per_stack_limit", ""); |
| // Limiting to kStackDepotMaxUseCount / 2 to avoid overflow in |
| // StackDepotHandle::inc_use_count_unsafe. |
| if (f->origin_history_per_stack_limit < 0 || |
| f->origin_history_per_stack_limit > kStackDepotMaxUseCount / 2) { |
| Printf( |
| "Origin per-stack limit invalid: %d. Must be 0 (unlimited) or in [1, " |
| "%d] range.\n", |
| f->origin_history_per_stack_limit, kStackDepotMaxUseCount / 2); |
| Die(); |
| } |
| |
| ParseFlag(str, &f->report_umrs, "report_umrs", ""); |
| ParseFlag(str, &f->wrap_signals, "wrap_signals", ""); |
| ParseFlag(str, &f->print_stats, "print_stats", ""); |
| ParseFlag(str, &f->atexit, "atexit", ""); |
| ParseFlag(str, &f->store_context_size, "store_context_size", ""); |
| if (f->store_context_size < 1) f->store_context_size = 1; |
| |
| // keep_going is an old name for halt_on_error, |
| // and it has inverse meaning. |
| f->halt_on_error = !f->halt_on_error; |
| ParseFlag(str, &f->halt_on_error, "keep_going", ""); |
| f->halt_on_error = !f->halt_on_error; |
| ParseFlag(str, &f->halt_on_error, "halt_on_error", ""); |
| } |
| |
| static void InitializeFlags(Flags *f, const char *options) { |
| CommonFlags *cf = common_flags(); |
| SetCommonFlagsDefaults(cf); |
| cf->external_symbolizer_path = GetEnv("MSAN_SYMBOLIZER_PATH"); |
| cf->malloc_context_size = 20; |
| cf->handle_ioctl = true; |
| // FIXME: test and enable. |
| cf->check_printf = false; |
| cf->intercept_tls_get_addr = true; |
| |
| internal_memset(f, 0, sizeof(*f)); |
| f->poison_heap_with_zeroes = false; |
| f->poison_stack_with_zeroes = false; |
| f->poison_in_malloc = true; |
| f->poison_in_free = true; |
| f->exit_code = 77; |
| f->origin_history_size = Origin::kMaxDepth; |
| f->origin_history_per_stack_limit = 20000; |
| f->report_umrs = true; |
| f->wrap_signals = true; |
| f->print_stats = false; |
| f->atexit = false; |
| f->halt_on_error = !&__msan_keep_going; |
| f->store_context_size = 20; |
| |
| // Override from user-specified string. |
| if (__msan_default_options) |
| ParseFlagsFromString(f, __msan_default_options()); |
| ParseFlagsFromString(f, options); |
| } |
| |
| void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp, |
| bool request_fast_unwind) { |
| MsanThread *t = GetCurrentThread(); |
| if (!t || !StackTrace::WillUseFastUnwind(request_fast_unwind)) { |
| // Block reports from our interceptors during _Unwind_Backtrace. |
| SymbolizerScope sym_scope; |
| return stack->Unwind(max_s, pc, bp, 0, 0, 0, request_fast_unwind); |
| } |
| stack->Unwind(max_s, pc, bp, 0, t->stack_top(), t->stack_bottom(), |
| request_fast_unwind); |
| } |
| |
| void PrintWarning(uptr pc, uptr bp) { |
| PrintWarningWithOrigin(pc, bp, __msan_origin_tls); |
| } |
| |
| void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin) { |
| if (msan_expect_umr) { |
| // Printf("Expected UMR\n"); |
| __msan_origin_tls = origin; |
| msan_expected_umr_found = 1; |
| return; |
| } |
| |
| ++msan_report_count; |
| |
| GET_FATAL_STACK_TRACE_PC_BP(pc, bp); |
| |
| u32 report_origin = |
| (__msan_get_track_origins() && Origin(origin).isValid()) ? origin : 0; |
| ReportUMR(&stack, report_origin); |
| |
| if (__msan_get_track_origins() && !Origin(origin).isValid()) { |
| Printf( |
| " ORIGIN: invalid (%x). Might be a bug in MemorySanitizer origin " |
| "tracking.\n This could still be a bug in your code, too!\n", |
| origin); |
| } |
| } |
| |
| void UnpoisonParam(uptr n) { |
| internal_memset(__msan_param_tls, 0, n * sizeof(*__msan_param_tls)); |
| } |
| |
| // Backup MSan runtime TLS state. |
| // Implementation must be async-signal-safe. |
| // Instances of this class may live on the signal handler stack, and data size |
| // may be an issue. |
| void ScopedThreadLocalStateBackup::Backup() { |
| va_arg_overflow_size_tls = __msan_va_arg_overflow_size_tls; |
| } |
| |
| void ScopedThreadLocalStateBackup::Restore() { |
| // A lame implementation that only keeps essential state and resets the rest. |
| __msan_va_arg_overflow_size_tls = va_arg_overflow_size_tls; |
| |
| internal_memset(__msan_param_tls, 0, sizeof(__msan_param_tls)); |
| internal_memset(__msan_retval_tls, 0, sizeof(__msan_retval_tls)); |
| internal_memset(__msan_va_arg_tls, 0, sizeof(__msan_va_arg_tls)); |
| |
| if (__msan_get_track_origins()) { |
| internal_memset(&__msan_retval_origin_tls, 0, |
| sizeof(__msan_retval_origin_tls)); |
| internal_memset(__msan_param_origin_tls, 0, |
| sizeof(__msan_param_origin_tls)); |
| } |
| } |
| |
| void UnpoisonThreadLocalState() { |
| } |
| |
| const char *GetStackOriginDescr(u32 id, uptr *pc) { |
| CHECK_LT(id, kNumStackOriginDescrs); |
| if (pc) *pc = StackOriginPC[id]; |
| return StackOriginDescr[id]; |
| } |
| |
| u32 ChainOrigin(u32 id, StackTrace *stack) { |
| MsanThread *t = GetCurrentThread(); |
| if (t && t->InSignalHandler()) |
| return id; |
| |
| Origin o(id); |
| int depth = o.depth(); |
| // 0 means unlimited depth. |
| if (flags()->origin_history_size > 0 && depth > 0) { |
| if (depth >= flags()->origin_history_size) { |
| return id; |
| } else { |
| ++depth; |
| } |
| } |
| |
| StackDepotHandle h = StackDepotPut_WithHandle(stack->trace, stack->size); |
| if (!h.valid()) return id; |
| int use_count = h.use_count(); |
| if (use_count > flags()->origin_history_per_stack_limit) |
| return id; |
| |
| u32 chained_id; |
| bool inserted = ChainedOriginDepotPut(h.id(), o.id(), &chained_id); |
| |
| if (inserted) h.inc_use_count_unsafe(); |
| |
| return Origin(chained_id, depth).raw_id(); |
| } |
| |
| } // namespace __msan |
| |
| // Interface. |
| |
| using namespace __msan; |
| |
| #define MSAN_MAYBE_WARNING(type, size) \ |
| void __msan_maybe_warning_##size(type s, u32 o) { \ |
| GET_CALLER_PC_BP_SP; \ |
| (void) sp; \ |
| if (UNLIKELY(s)) { \ |
| PrintWarningWithOrigin(pc, bp, o); \ |
| if (__msan::flags()->halt_on_error) { \ |
| Printf("Exiting\n"); \ |
| Die(); \ |
| } \ |
| } \ |
| } |
| |
| MSAN_MAYBE_WARNING(u8, 1) |
| MSAN_MAYBE_WARNING(u16, 2) |
| MSAN_MAYBE_WARNING(u32, 4) |
| MSAN_MAYBE_WARNING(u64, 8) |
| |
| #define MSAN_MAYBE_STORE_ORIGIN(type, size) \ |
| void __msan_maybe_store_origin_##size(type s, void *p, u32 o) { \ |
| if (UNLIKELY(s)) { \ |
| if (__msan_get_track_origins() > 1) { \ |
| GET_CALLER_PC_BP_SP; \ |
| (void) sp; \ |
| GET_STORE_STACK_TRACE_PC_BP(pc, bp); \ |
| o = ChainOrigin(o, &stack); \ |
| } \ |
| *(u32 *)MEM_TO_ORIGIN((uptr)p & ~3UL) = o; \ |
| } \ |
| } |
| |
| MSAN_MAYBE_STORE_ORIGIN(u8, 1) |
| MSAN_MAYBE_STORE_ORIGIN(u16, 2) |
| MSAN_MAYBE_STORE_ORIGIN(u32, 4) |
| MSAN_MAYBE_STORE_ORIGIN(u64, 8) |
| |
| void __msan_warning() { |
| GET_CALLER_PC_BP_SP; |
| (void)sp; |
| PrintWarning(pc, bp); |
| if (__msan::flags()->halt_on_error) { |
| if (__msan::flags()->print_stats) |
| ReportStats(); |
| Printf("Exiting\n"); |
| Die(); |
| } |
| } |
| |
| void __msan_warning_noreturn() { |
| GET_CALLER_PC_BP_SP; |
| (void)sp; |
| PrintWarning(pc, bp); |
| if (__msan::flags()->print_stats) |
| ReportStats(); |
| Printf("Exiting\n"); |
| Die(); |
| } |
| |
| void __msan_init() { |
| CHECK(!msan_init_is_running); |
| if (msan_inited) return; |
| msan_init_is_running = 1; |
| SanitizerToolName = "MemorySanitizer"; |
| |
| SetDieCallback(MsanDie); |
| InitTlsSize(); |
| |
| const char *msan_options = GetEnv("MSAN_OPTIONS"); |
| InitializeFlags(&msan_flags, msan_options); |
| if (common_flags()->help) PrintFlagDescriptions(); |
| __sanitizer_set_report_path(common_flags()->log_path); |
| |
| InitializeInterceptors(); |
| InstallAtExitHandler(); // Needs __cxa_atexit interceptor. |
| |
| if (MSAN_REPLACE_OPERATORS_NEW_AND_DELETE) |
| ReplaceOperatorsNewAndDelete(); |
| if (StackSizeIsUnlimited()) { |
| VPrintf(1, "Unlimited stack, doing reexec\n"); |
| // A reasonably large stack size. It is bigger than the usual 8Mb, because, |
| // well, the program could have been run with unlimited stack for a reason. |
| SetStackSizeLimitInBytes(32 * 1024 * 1024); |
| ReExec(); |
| } |
| |
| VPrintf(1, "MSAN_OPTIONS: %s\n", msan_options ? msan_options : "<empty>"); |
| |
| __msan_clear_on_return(); |
| if (__msan_get_track_origins()) |
| VPrintf(1, "msan_track_origins\n"); |
| if (!InitShadow(/* prot1 */ !msan_running_under_dr, /* prot2 */ true, |
| /* map_shadow */ true, __msan_get_track_origins())) { |
| Printf("FATAL: MemorySanitizer can not mmap the shadow memory.\n"); |
| Printf("FATAL: Make sure to compile with -fPIE and to link with -pie.\n"); |
| Printf("FATAL: Disabling ASLR is known to cause this error.\n"); |
| Printf("FATAL: If running under GDB, try " |
| "'set disable-randomization off'.\n"); |
| DumpProcessMap(); |
| Die(); |
| } |
| |
| Symbolizer::Init(common_flags()->external_symbolizer_path); |
| Symbolizer::Get()->AddHooks(EnterSymbolizer, ExitSymbolizer); |
| |
| MsanTSDInit(MsanTSDDtor); |
| |
| MsanThread *main_thread = MsanThread::Create(0, 0); |
| SetCurrentThread(main_thread); |
| main_thread->ThreadStart(); |
| |
| VPrintf(1, "MemorySanitizer init done\n"); |
| |
| msan_init_is_running = 0; |
| msan_inited = 1; |
| } |
| |
| void __msan_set_exit_code(int exit_code) { |
| flags()->exit_code = exit_code; |
| } |
| |
| void __msan_set_keep_going(int keep_going) { |
| flags()->halt_on_error = !keep_going; |
| } |
| |
| void __msan_set_expect_umr(int expect_umr) { |
| if (expect_umr) { |
| msan_expected_umr_found = 0; |
| } else if (!msan_expected_umr_found) { |
| GET_CALLER_PC_BP_SP; |
| (void)sp; |
| GET_FATAL_STACK_TRACE_PC_BP(pc, bp); |
| ReportExpectedUMRNotFound(&stack); |
| Die(); |
| } |
| msan_expect_umr = expect_umr; |
| } |
| |
| void __msan_print_shadow(const void *x, uptr size) { |
| if (!MEM_IS_APP(x)) { |
| Printf("Not a valid application address: %p\n", x); |
| return; |
| } |
| |
| DescribeMemoryRange(x, size); |
| } |
| |
| void __msan_dump_shadow(const void *x, uptr size) { |
| if (!MEM_IS_APP(x)) { |
| Printf("Not a valid application address: %p\n", x); |
| return; |
| } |
| |
| unsigned char *s = (unsigned char*)MEM_TO_SHADOW(x); |
| for (uptr i = 0; i < size; i++) { |
| #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| Printf("%x%x ", s[i] & 0xf, s[i] >> 4); |
| #else |
| Printf("%x%x ", s[i] >> 4, s[i] & 0xf); |
| #endif |
| } |
| Printf("\n"); |
| } |
| |
| sptr __msan_test_shadow(const void *x, uptr size) { |
| if (!MEM_IS_APP(x)) return -1; |
| unsigned char *s = (unsigned char *)MEM_TO_SHADOW((uptr)x); |
| for (uptr i = 0; i < size; ++i) |
| if (s[i]) |
| return i; |
| return -1; |
| } |
| |
| void __msan_check_mem_is_initialized(const void *x, uptr size) { |
| if (!__msan::flags()->report_umrs) return; |
| sptr offset = __msan_test_shadow(x, size); |
| if (offset < 0) |
| return; |
| |
| GET_CALLER_PC_BP_SP; |
| (void)sp; |
| ReportUMRInsideAddressRange(__func__, x, size, offset); |
| __msan::PrintWarningWithOrigin(pc, bp, |
| __msan_get_origin(((char *)x) + offset)); |
| if (__msan::flags()->halt_on_error) { |
| Printf("Exiting\n"); |
| Die(); |
| } |
| } |
| |
| int __msan_set_poison_in_malloc(int do_poison) { |
| int old = flags()->poison_in_malloc; |
| flags()->poison_in_malloc = do_poison; |
| return old; |
| } |
| |
| int __msan_has_dynamic_component() { |
| return msan_running_under_dr; |
| } |
| |
| NOINLINE |
| void __msan_clear_on_return() { |
| __msan_param_tls[0] = 0; |
| } |
| |
| static void* get_tls_base() { |
| u64 p; |
| asm("mov %%fs:0, %0" |
| : "=r"(p) ::); |
| return (void*)p; |
| } |
| |
| int __msan_get_retval_tls_offset() { |
| // volatile here is needed to avoid UB, because the compiler thinks that we |
| // are doing address arithmetics on unrelated pointers, and takes some |
| // shortcuts |
| volatile sptr retval_tls_p = (sptr)&__msan_retval_tls; |
| volatile sptr tls_base_p = (sptr)get_tls_base(); |
| return retval_tls_p - tls_base_p; |
| } |
| |
| int __msan_get_param_tls_offset() { |
| // volatile here is needed to avoid UB, because the compiler thinks that we |
| // are doing address arithmetics on unrelated pointers, and takes some |
| // shortcuts |
| volatile sptr param_tls_p = (sptr)&__msan_param_tls; |
| volatile sptr tls_base_p = (sptr)get_tls_base(); |
| return param_tls_p - tls_base_p; |
| } |
| |
| void __msan_partial_poison(const void* data, void* shadow, uptr size) { |
| internal_memcpy((void*)MEM_TO_SHADOW((uptr)data), shadow, size); |
| } |
| |
| void __msan_load_unpoisoned(void *src, uptr size, void *dst) { |
| internal_memcpy(dst, src, size); |
| __msan_unpoison(dst, size); |
| } |
| |
| void __msan_set_origin(const void *a, uptr size, u32 origin) { |
| // Origin mapping is 4 bytes per 4 bytes of application memory. |
| // Here we extend the range such that its left and right bounds are both |
| // 4 byte aligned. |
| if (!__msan_get_track_origins()) return; |
| uptr x = MEM_TO_ORIGIN((uptr)a); |
| uptr beg = x & ~3UL; // align down. |
| uptr end = (x + size + 3) & ~3UL; // align up. |
| u64 origin64 = ((u64)origin << 32) | origin; |
| // This is like memset, but the value is 32-bit. We unroll by 2 to write |
| // 64 bits at once. May want to unroll further to get 128-bit stores. |
| if (beg & 7ULL) { |
| *(u32*)beg = origin; |
| beg += 4; |
| } |
| for (uptr addr = beg; addr < (end & ~7UL); addr += 8) |
| *(u64*)addr = origin64; |
| if (end & 7ULL) |
| *(u32*)(end - 4) = origin; |
| } |
| |
| // 'descr' is created at compile time and contains '----' in the beginning. |
| // When we see descr for the first time we replace '----' with a uniq id |
| // and set the origin to (id | (31-th bit)). |
| void __msan_set_alloca_origin(void *a, uptr size, const char *descr) { |
| __msan_set_alloca_origin4(a, size, descr, 0); |
| } |
| |
| void __msan_set_alloca_origin4(void *a, uptr size, const char *descr, uptr pc) { |
| static const u32 dash = '-'; |
| static const u32 first_timer = |
| dash + (dash << 8) + (dash << 16) + (dash << 24); |
| u32 *id_ptr = (u32*)descr; |
| bool print = false; // internal_strstr(descr + 4, "AllocaTOTest") != 0; |
| u32 id = *id_ptr; |
| if (id == first_timer) { |
| u32 idx = atomic_fetch_add(&NumStackOriginDescrs, 1, memory_order_relaxed); |
| CHECK_LT(idx, kNumStackOriginDescrs); |
| StackOriginDescr[idx] = descr + 4; |
| StackOriginPC[idx] = pc; |
| ChainedOriginDepotPut(idx, Origin::kStackRoot, &id); |
| *id_ptr = id; |
| if (print) |
| Printf("First time: idx=%d id=%d %s %p \n", idx, id, descr + 4, pc); |
| } |
| if (print) |
| Printf("__msan_set_alloca_origin: descr=%s id=%x\n", descr + 4, id); |
| __msan_set_origin(a, size, Origin(id, 1).raw_id()); |
| } |
| |
| u32 __msan_chain_origin(u32 id) { |
| GET_CALLER_PC_BP_SP; |
| (void)sp; |
| GET_STORE_STACK_TRACE_PC_BP(pc, bp); |
| return ChainOrigin(id, &stack); |
| } |
| |
| u32 __msan_get_origin(const void *a) { |
| if (!__msan_get_track_origins()) return 0; |
| uptr x = (uptr)a; |
| uptr aligned = x & ~3ULL; |
| uptr origin_ptr = MEM_TO_ORIGIN(aligned); |
| return *(u32*)origin_ptr; |
| } |
| |
| u32 __msan_get_umr_origin() { |
| return __msan_origin_tls; |
| } |
| |
| u16 __sanitizer_unaligned_load16(const uu16 *p) { |
| __msan_retval_tls[0] = *(uu16 *)MEM_TO_SHADOW((uptr)p); |
| if (__msan_get_track_origins()) |
| __msan_retval_origin_tls = GetOriginIfPoisoned((uptr)p, sizeof(*p)); |
| return *p; |
| } |
| u32 __sanitizer_unaligned_load32(const uu32 *p) { |
| __msan_retval_tls[0] = *(uu32 *)MEM_TO_SHADOW((uptr)p); |
| if (__msan_get_track_origins()) |
| __msan_retval_origin_tls = GetOriginIfPoisoned((uptr)p, sizeof(*p)); |
| return *p; |
| } |
| u64 __sanitizer_unaligned_load64(const uu64 *p) { |
| __msan_retval_tls[0] = *(uu64 *)MEM_TO_SHADOW((uptr)p); |
| if (__msan_get_track_origins()) |
| __msan_retval_origin_tls = GetOriginIfPoisoned((uptr)p, sizeof(*p)); |
| return *p; |
| } |
| void __sanitizer_unaligned_store16(uu16 *p, u16 x) { |
| u16 s = __msan_param_tls[1]; |
| *(uu16 *)MEM_TO_SHADOW((uptr)p) = s; |
| if (s && __msan_get_track_origins()) |
| if (uu32 o = __msan_param_origin_tls[2]) |
| SetOriginIfPoisoned((uptr)p, (uptr)&s, sizeof(s), o); |
| *p = x; |
| } |
| void __sanitizer_unaligned_store32(uu32 *p, u32 x) { |
| u32 s = __msan_param_tls[1]; |
| *(uu32 *)MEM_TO_SHADOW((uptr)p) = s; |
| if (s && __msan_get_track_origins()) |
| if (uu32 o = __msan_param_origin_tls[2]) |
| SetOriginIfPoisoned((uptr)p, (uptr)&s, sizeof(s), o); |
| *p = x; |
| } |
| void __sanitizer_unaligned_store64(uu64 *p, u64 x) { |
| u64 s = __msan_param_tls[1]; |
| *(uu64 *)MEM_TO_SHADOW((uptr)p) = s; |
| if (s && __msan_get_track_origins()) |
| if (uu32 o = __msan_param_origin_tls[2]) |
| SetOriginIfPoisoned((uptr)p, (uptr)&s, sizeof(s), o); |
| *p = x; |
| } |
| |
| void __msan_set_death_callback(void (*callback)(void)) { |
| death_callback = callback; |
| } |
| |
| void *__msan_wrap_indirect_call(void *target) { |
| return IndirectExternCall(target); |
| } |
| |
| void __msan_dr_is_initialized() { |
| msan_running_under_dr = true; |
| } |
| |
| void __msan_set_indirect_call_wrapper(uptr wrapper) { |
| SetIndirectCallWrapper(wrapper); |
| } |
| |
| #if !SANITIZER_SUPPORTS_WEAK_HOOKS |
| extern "C" { |
| SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE |
| const char* __msan_default_options() { return ""; } |
| } // extern "C" |
| #endif |
| |
| extern "C" { |
| SANITIZER_INTERFACE_ATTRIBUTE |
| void __sanitizer_print_stack_trace() { |
| GET_FATAL_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME()); |
| stack.Print(); |
| } |
| } // extern "C" |