diff options
| author | Sam Clegg <sbc@chromium.org> | 2021-05-22 16:39:33 +0300 |
|---|---|---|
| committer | Sam Clegg <sbc@chromium.org> | 2022-09-06 12:34:14 +0300 |
| commit | b88f4ab4994e008b539522fb27bfd46fd8de9639 (patch) | |
| tree | 1da79a06cbb32f0c662bfcc610ffd010c3b53889 | |
| parent | 4ba6a9c9f65bbc8bd06e3652cb20fd4dfc846137 (diff) | |
Rebase of changed from emscripten-libs-13.0.0 onto llvmorg-14.0.0emscripten-libs-15.0.0
62 files changed, 666 insertions, 144 deletions
diff --git a/compiler-rt/lib/asan/asan_errors.cpp b/compiler-rt/lib/asan/asan_errors.cpp index 10f7c17991d7..c5f958a45319 100644 --- a/compiler-rt/lib/asan/asan_errors.cpp +++ b/compiler-rt/lib/asan/asan_errors.cpp @@ -480,6 +480,17 @@ ErrorGeneric::ErrorGeneric(u32 tid, uptr pc_, uptr bp_, uptr sp_, uptr addr, scariness.Scare(bug_type_score + read_after_free_bonus, bug_descr); if (far_from_bounds) scariness.Scare(10, "far-from-bounds"); } +#if SANITIZER_EMSCRIPTEN + // If address is in the first page (64 KB), then it is likely that the + // access is a result of a null pointer dereference. + else if (addr < 65536) { + bug_descr = "null-pointer-dereference"; + scariness.Scare(25, bug_descr); + } else if (AddrIsInShadow(addr)) { + bug_descr = "shadow-access"; + scariness.Scare(25, bug_descr); + } +#endif } } diff --git a/compiler-rt/lib/asan/asan_flags.cpp b/compiler-rt/lib/asan/asan_flags.cpp index 239898433232..b1feaf903e20 100644 --- a/compiler-rt/lib/asan/asan_flags.cpp +++ b/compiler-rt/lib/asan/asan_flags.cpp @@ -22,6 +22,12 @@ #include "ubsan/ubsan_flags.h" #include "ubsan/ubsan_platform.h" +#if SANITIZER_EMSCRIPTEN +extern "C" void emscripten_builtin_free(void *); +#include <emscripten/em_asm.h> +#endif + + namespace __asan { Flags asan_flags_dont_use_directly; // use via flags(). @@ -54,7 +60,11 @@ void InitializeFlags() { CommonFlags cf; cf.CopyFrom(*common_flags()); cf.detect_leaks = cf.detect_leaks && CAN_SANITIZE_LEAKS; +#if !SANITIZER_EMSCRIPTEN + // getenv on emscripten uses malloc, which we can't when using LSan. + // You can't run external symbolizer executables anyway. cf.external_symbolizer_path = GetEnv("ASAN_SYMBOLIZER_PATH"); +#endif cf.malloc_context_size = kDefaultMallocContextSize; cf.intercept_tls_get_addr = true; cf.exitcode = 1; @@ -115,6 +125,27 @@ void InitializeFlags() { lsan_parser.ParseString(lsan_default_options); #endif +#if SANITIZER_EMSCRIPTEN + char *options; + // Override from Emscripten Module. + // TODO: add EM_ASM_I64 and avoid using a double for a 64-bit pointer. +#define MAKE_OPTION_LOAD(parser, name) \ + options = (char*)(long)EM_ASM_DOUBLE({ \ + return withBuiltinMalloc(function () { \ + return allocateUTF8(Module[name] || 0); \ + }); \ + }); \ + parser.ParseString(options); \ + emscripten_builtin_free(options); + + MAKE_OPTION_LOAD(asan_parser, 'ASAN_OPTIONS'); +#if CAN_SANITIZE_LEAKS + MAKE_OPTION_LOAD(lsan_parser, 'LSAN_OPTIONS'); +#endif +#if CAN_SANITIZE_UB + MAKE_OPTION_LOAD(ubsan_parser, 'UBSAN_OPTIONS'); +#endif +#else // Override from command line. asan_parser.ParseStringFromEnv("ASAN_OPTIONS"); #if CAN_SANITIZE_LEAKS @@ -123,12 +154,18 @@ void InitializeFlags() { #if CAN_SANITIZE_UB ubsan_parser.ParseStringFromEnv("UBSAN_OPTIONS"); #endif +#endif // SANITIZER_EMSCRIPTEN InitializeCommonFlags(); // TODO(eugenis): dump all flags at verbosity>=2? if (Verbosity()) ReportUnrecognizedFlags(); +#if SANITIZER_EMSCRIPTEN + if (common_flags()->malloc_context_size <= 1) + StackTrace::snapshot_stack = false; +#endif // SANITIZER_EMSCRIPTEN + if (common_flags()->help) { // TODO(samsonov): print all of the flags (ASan, LSan, common). asan_parser.PrintFlagDescriptions(); diff --git a/compiler-rt/lib/asan/asan_globals.cpp b/compiler-rt/lib/asan/asan_globals.cpp index b780128c9adb..80de7403a4bc 100644 --- a/compiler-rt/lib/asan/asan_globals.cpp +++ b/compiler-rt/lib/asan/asan_globals.cpp @@ -312,6 +312,7 @@ void PrintGlobalLocation(InternalScopedString *str, const __asan_global &g) { // ---------------------- Interface ---------------- {{{1 using namespace __asan; +#if !SANITIZER_EMSCRIPTEN // Apply __asan_register_globals to all globals found in the same loaded // executable or shared library as `flag'. The flag tracks whether globals have // already been registered or not for this image. @@ -349,6 +350,7 @@ void __asan_unregister_elf_globals(uptr *flag, void *start, void *stop) { __asan_unregister_globals(globals_start, globals_stop - globals_start); *flag = 0; } +#endif // Register an array of globals. void __asan_register_globals(__asan_global *globals, uptr n) { diff --git a/compiler-rt/lib/asan/asan_interceptors.cpp b/compiler-rt/lib/asan/asan_interceptors.cpp index 817008253fc0..ed6278b3c047 100644 --- a/compiler-rt/lib/asan/asan_interceptors.cpp +++ b/compiler-rt/lib/asan/asan_interceptors.cpp @@ -23,10 +23,10 @@ #include "lsan/lsan_common.h" #include "sanitizer_common/sanitizer_libc.h" -// There is no general interception at all on Fuchsia. +// There is no general interception at all on Fuchsia or Emscripten. // Only the functions in asan_interceptors_memintrinsics.cpp are // really defined to replace libc functions. -#if !SANITIZER_FUCHSIA +#if !SANITIZER_FUCHSIA && !SANITIZER_EMSCRIPTEN # if SANITIZER_POSIX # include "sanitizer_common/sanitizer_posix.h" @@ -723,4 +723,4 @@ void InitializeAsanInterceptors() { } // namespace __asan -#endif // !SANITIZER_FUCHSIA +#endif // !SANITIZER_FUCHSIA && !SANITIZER_RTEMS && !SANITIZER_EMSCRIPTEN diff --git a/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp b/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp index 9c316bb95749..9e275ba211e2 100644 --- a/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp +++ b/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp @@ -30,7 +30,7 @@ void *__asan_memmove(void *to, const void *from, uptr size) { ASAN_MEMMOVE_IMPL(nullptr, to, from, size); } -#if SANITIZER_FUCHSIA +#if SANITIZER_FUCHSIA || SANITIZER_EMSCRIPTEN // Fuchsia doesn't use sanitizer_common_interceptors.inc, but // the only things there it wants are these three. Just define them @@ -40,4 +40,4 @@ extern "C" decltype(__asan_memcpy) memcpy[[gnu::alias("__asan_memcpy")]]; extern "C" decltype(__asan_memmove) memmove[[gnu::alias("__asan_memmove")]]; extern "C" decltype(__asan_memset) memset[[gnu::alias("__asan_memset")]]; -#endif // SANITIZER_FUCHSIA +#endif // SANITIZER_FUCHSIA || SANITIZER_EMSCRIPTEN diff --git a/compiler-rt/lib/asan/asan_malloc_linux.cpp b/compiler-rt/lib/asan/asan_malloc_linux.cpp index bab80b96f584..a7c04435df81 100644 --- a/compiler-rt/lib/asan/asan_malloc_linux.cpp +++ b/compiler-rt/lib/asan/asan_malloc_linux.cpp @@ -15,7 +15,7 @@ #include "sanitizer_common/sanitizer_platform.h" #if SANITIZER_FREEBSD || SANITIZER_FUCHSIA || SANITIZER_LINUX || \ - SANITIZER_NETBSD || SANITIZER_SOLARIS + SANITIZER_NETBSD || SANITIZER_SOLARIS || SANITIZER_EMSCRIPTEN # include "asan_allocator.h" # include "asan_interceptors.h" diff --git a/compiler-rt/lib/asan/asan_mapping.h b/compiler-rt/lib/asan/asan_mapping.h index aeadb9d94ebd..c9b2f54837fa 100644 --- a/compiler-rt/lib/asan/asan_mapping.h +++ b/compiler-rt/lib/asan/asan_mapping.h @@ -269,6 +269,8 @@ extern uptr kHighMemEnd, kMidMemBeg, kMidMemEnd; // Initialized in __asan_init. # if defined(__sparc__) && SANITIZER_WORDSIZE == 64 # include "asan_mapping_sparc64.h" +# elif SANITIZER_EMSCRIPTEN +# include "asan_mapping_emscripten.h" # else # define MEM_TO_SHADOW(mem) \ (((mem) >> ASAN_SHADOW_SCALE) + (ASAN_SHADOW_OFFSET)) diff --git a/compiler-rt/lib/asan/asan_poisoning.cpp b/compiler-rt/lib/asan/asan_poisoning.cpp index 3b7c9d1312d6..deaf44ad89e7 100644 --- a/compiler-rt/lib/asan/asan_poisoning.cpp +++ b/compiler-rt/lib/asan/asan_poisoning.cpp @@ -178,6 +178,15 @@ uptr __asan_region_is_poisoned(uptr beg, uptr size) { if (!size) return 0; uptr end = beg + size; +#if SANITIZER_EMSCRIPTEN + // XXX Emscripten hack XXX + // Null pointer handling, since Emscripten does not crash on null pointer, + // ASan must catch null pointer dereference by itself. + // Unfortunately, this function returns 0 to mean the region is not + // poisoned, so we must return 1 instead if we receive a region + // starting at 0. + if (!beg) return 1; +#endif if (!AddrIsInMem(beg)) return beg; if (!AddrIsInMem(end)) diff --git a/compiler-rt/lib/asan/asan_poisoning.h b/compiler-rt/lib/asan/asan_poisoning.h index 600bd011f304..e34de6c09dd5 100644 --- a/compiler-rt/lib/asan/asan_poisoning.h +++ b/compiler-rt/lib/asan/asan_poisoning.h @@ -51,6 +51,10 @@ ALWAYS_INLINE void FastPoisonShadow(uptr aligned_beg, uptr aligned_size, // probably provide higher-level interface for these operations. // For now, just memset on Windows. if (value || SANITIZER_WINDOWS == 1 || + // Emscripten doesn't have a nice way to zero whole pages. + // The bulk memory proposal will allow memset to be optimized, but + // even then, we still must use memset. + SANITIZER_EMSCRIPTEN == 1 || shadow_end - shadow_beg < common_flags()->clear_shadow_mmap_threshold) { REAL(memset)((void*)shadow_beg, value, shadow_end - shadow_beg); } else { diff --git a/compiler-rt/lib/asan/asan_posix.cpp b/compiler-rt/lib/asan/asan_posix.cpp index 765f4a26cd7a..36e8952d9574 100644 --- a/compiler-rt/lib/asan/asan_posix.cpp +++ b/compiler-rt/lib/asan/asan_posix.cpp @@ -41,6 +41,9 @@ void AsanOnDeadlySignal(int signo, void *siginfo, void *context) { } bool PlatformUnpoisonStacks() { +#if SANITIZER_EMSCRIPTEN + return false; +#else stack_t signal_stack; CHECK_EQ(0, sigaltstack(nullptr, &signal_stack)); uptr sigalt_bottom = (uptr)signal_stack.ss_sp; @@ -64,6 +67,7 @@ bool PlatformUnpoisonStacks() { &tls_size); UnpoisonStack(default_bottom, default_bottom + stack_size, "default"); return true; +#endif } // ---------------------- TSD ---------------- {{{1 diff --git a/compiler-rt/lib/asan/asan_rtl.cpp b/compiler-rt/lib/asan/asan_rtl.cpp index 2bbf0ac5240a..452019116391 100644 --- a/compiler-rt/lib/asan/asan_rtl.cpp +++ b/compiler-rt/lib/asan/asan_rtl.cpp @@ -54,6 +54,7 @@ static void AsanDie() { WaitForDebugger(flags()->sleep_before_dying, "before dying"); +#if !SANITIZER_EMSCRIPTEN if (flags()->unmap_shadow_on_exit) { if (kMidMemBeg) { UnmapOrDie((void*)kLowShadowBeg, kMidMemBeg - kLowShadowBeg); @@ -63,6 +64,7 @@ static void AsanDie() { UnmapOrDie((void*)kLowShadowBeg, kHighShadowEnd - kLowShadowBeg); } } +#endif } static void CheckUnwind() { @@ -307,6 +309,7 @@ static void asan_atexit() { } static void InitializeHighMemEnd() { +#if !SANITIZER_EMSCRIPTEN #if !ASAN_FIXED_MAPPING kHighMemEnd = GetMaxUserVirtualAddress(); // Increase kHighMemEnd to make sure it's properly @@ -314,6 +317,7 @@ static void InitializeHighMemEnd() { kHighMemEnd |= (GetMmapGranularity() << ASAN_SHADOW_SCALE) - 1; #endif // !ASAN_FIXED_MAPPING CHECK_EQ((kHighMemBeg % GetMmapGranularity()), 0); +#endif // !SANITIZER_EMSCRIPTEN } void PrintAddressSpaceLayout() { @@ -440,7 +444,9 @@ static void AsanInitInternal() { InitializeShadowMemory(); AsanTSDInit(PlatformTSDDtor); +#if !SANITIZER_EMSCRIPTEN InstallDeadlySignalHandlers(AsanOnDeadlySignal); +#endif AllocatorOptions allocator_options; allocator_options.SetFrom(flags(), common_flags()); diff --git a/compiler-rt/lib/asan/asan_shadow_setup.cpp b/compiler-rt/lib/asan/asan_shadow_setup.cpp index fc6de39622b5..83f1906aaebf 100644 --- a/compiler-rt/lib/asan/asan_shadow_setup.cpp +++ b/compiler-rt/lib/asan/asan_shadow_setup.cpp @@ -13,8 +13,9 @@ #include "sanitizer_common/sanitizer_platform.h" -// asan_fuchsia.cpp has their own InitializeShadowMemory implementation. -#if !SANITIZER_FUCHSIA +// asan_fuchsia.cpp and asan_emscripten.cc have have their own +// InitializeShadowMemory implementation. +#if !SANITIZER_FUCHSIA && !SANITIZER_EMSCRIPTEN # include "asan_internal.h" # include "asan_mapping.h" diff --git a/compiler-rt/lib/asan/asan_thread.cpp b/compiler-rt/lib/asan/asan_thread.cpp index c15963e14183..ab67942bbf6b 100644 --- a/compiler-rt/lib/asan/asan_thread.cpp +++ b/compiler-rt/lib/asan/asan_thread.cpp @@ -105,8 +105,10 @@ void AsanThread::Destroy() { if (AsanThread *thread = GetCurrentThread()) CHECK_EQ(this, thread); malloc_storage().CommitBack(); +#if !SANITIZER_EMSCRIPTEN if (common_flags()->use_sigaltstack) UnsetAlternateSignalStack(); +#endif FlushToDeadThreadStats(&stats_); // We also clear the shadow on thread destruction because // some code may still be executing in later TSD destructors @@ -264,7 +266,9 @@ thread_return_t AsanThread::ThreadStart(tid_t os_id) { Init(); asanThreadRegistry().StartThread(tid(), os_id, ThreadType::Regular, nullptr); +#if !SANITIZER_EMSCRIPTEN if (common_flags()->use_sigaltstack) SetAlternateSignalStack(); +#endif if (!start_routine_) { // start_routine_ == 0 if we're on the main thread or on one of the diff --git a/compiler-rt/lib/builtins/fp_compare_impl.inc b/compiler-rt/lib/builtins/fp_compare_impl.inc index a9a4f6fbf5df..83bdea46a45d 100644 --- a/compiler-rt/lib/builtins/fp_compare_impl.inc +++ b/compiler-rt/lib/builtins/fp_compare_impl.inc @@ -12,7 +12,7 @@ // functions. We need to ensure that the return value is sign-extended in the // same way as GCC expects (since otherwise GCC-generated __builtin_isinf // returns true for finite 128-bit floating-point numbers). -#ifdef __aarch64__ +#if defined(__aarch64__) || defined(__wasm__) // AArch64 GCC overrides libgcc_cmp_return to use int instead of long. typedef int CMP_RESULT; #elif __SIZEOF_POINTER__ == 8 && __SIZEOF_LONG__ == 4 diff --git a/compiler-rt/lib/interception/interception.h b/compiler-rt/lib/interception/interception.h index d97974ee9074..370e4ab844a6 100644 --- a/compiler-rt/lib/interception/interception.h +++ b/compiler-rt/lib/interception/interception.h @@ -18,7 +18,7 @@ #if !SANITIZER_LINUX && !SANITIZER_FREEBSD && !SANITIZER_APPLE && \ !SANITIZER_NETBSD && !SANITIZER_WINDOWS && !SANITIZER_FUCHSIA && \ - !SANITIZER_SOLARIS + !SANITIZER_SOLARIS && !SANITIZER_EMSCRIPTEN # error "Interception doesn't work on this operating system." #endif @@ -130,6 +130,11 @@ const interpose_substitution substitution_##func_name[] \ extern "C" ret_type func(__VA_ARGS__); # define DECLARE_WRAPPER_WINAPI(ret_type, func, ...) \ extern "C" __declspec(dllimport) ret_type __stdcall func(__VA_ARGS__); +#elif SANITIZER_EMSCRIPTEN +# define WRAP(x) x +# define WRAPPER_NAME(x) #x +# define INTERCEPTOR_ATTRIBUTE +# define DECLARE_WRAPPER(ret_type, func, ...) #elif SANITIZER_FREEBSD || SANITIZER_NETBSD # define WRAP(x) __interceptor_ ## x # define WRAPPER_NAME(x) "__interceptor_" #x @@ -157,6 +162,13 @@ const interpose_substitution substitution_##func_name[] \ # define INTERCEPTOR_ATTRIBUTE __attribute__((visibility("default"))) # define REAL(x) __unsanitized_##x # define DECLARE_REAL(ret_type, func, ...) +#elif SANITIZER_EMSCRIPTEN +// Sanitizer runtimes on Emscripten just define functions directly to override +// the libc functions. If the real version is really needed, they can be defined +// with the emscripten_builtin_ prefix. +# define REAL(x) emscripten_builtin_##x +# define DECLARE_REAL(ret_type, func, ...) \ + extern "C" ret_type REAL(func)(__VA_ARGS__); #elif !SANITIZER_APPLE # define PTR_TO_REAL(x) real_##x # define REAL(x) __interception::PTR_TO_REAL(x) @@ -193,7 +205,7 @@ const interpose_substitution substitution_##func_name[] \ // macros does its job. In exceptional cases you may need to call REAL(foo) // without defining INTERCEPTOR(..., foo, ...). For example, if you override // foo with an interceptor for other function. -#if !SANITIZER_APPLE && !SANITIZER_FUCHSIA +#if !SANITIZER_APPLE && !SANITIZER_FUCHSIA && !SANITIZER_EMSCRIPTEN # define DEFINE_REAL(ret_type, func, ...) \ typedef ret_type (*FUNC_TYPE(func))(__VA_ARGS__); \ namespace __interception { \ @@ -263,16 +275,16 @@ const interpose_substitution substitution_##func_name[] \ // INTERCEPT_FUNCTION macro, only its name. namespace __interception { #if defined(_WIN64) -typedef unsigned long long uptr; +typedef unsigned long long uptr; // NOLINT #else -typedef unsigned long uptr; +typedef unsigned long uptr; // NOLINT #endif // _WIN64 } // namespace __interception #define INCLUDED_FROM_INTERCEPTION_LIB #if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \ - SANITIZER_SOLARIS + SANITIZER_SOLARIS || SANITIZER_EMSCRIPTEN # include "interception_linux.h" # define INTERCEPT_FUNCTION(func) INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func) diff --git a/compiler-rt/lib/interception/interception_linux.h b/compiler-rt/lib/interception/interception_linux.h index a08f8cb98c40..6d3957e57026 100644 --- a/compiler-rt/lib/interception/interception_linux.h +++ b/compiler-rt/lib/interception/interception_linux.h @@ -12,7 +12,7 @@ //===----------------------------------------------------------------------===// #if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \ - SANITIZER_SOLARIS + SANITIZER_SOLARIS || SANITIZER_EMSCRIPTEN #if !defined(INCLUDED_FROM_INTERCEPTION_LIB) # error "interception_linux.h should be included from interception library only" diff --git a/compiler-rt/lib/lsan/lsan.cpp b/compiler-rt/lib/lsan/lsan.cpp index 489c5ca01fed..a0a214ce3987 100644 --- a/compiler-rt/lib/lsan/lsan.cpp +++ b/compiler-rt/lib/lsan/lsan.cpp @@ -20,6 +20,11 @@ #include "sanitizer_common/sanitizer_flags.h" #include "sanitizer_common/sanitizer_interface_internal.h" +#if SANITIZER_EMSCRIPTEN +extern "C" void emscripten_builtin_free(void *); +#include <emscripten/em_asm.h> +#endif + bool lsan_inited; bool lsan_init_is_running; @@ -54,7 +59,11 @@ static void InitializeFlags() { { CommonFlags cf; cf.CopyFrom(*common_flags()); +#if !SANITIZER_EMSCRIPTEN + // getenv on emscripten uses malloc, which we can't when using LSan. + // You can't run external symbolizers anyway. cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH"); +#endif cf.malloc_context_size = 30; cf.intercept_tls_get_addr = true; cf.detect_leaks = true; @@ -72,7 +81,22 @@ static void InitializeFlags() { // Override from user-specified string. const char *lsan_default_options = __lsan_default_options(); parser.ParseString(lsan_default_options); - parser.ParseStringFromEnv("LSAN_OPTIONS"); +#if SANITIZER_EMSCRIPTEN + char *options = (char*) EM_ASM_INT({ + return withBuiltinMalloc(function () { + return allocateUTF8(Module['LSAN_OPTIONS'] || 0); + }); + }); + parser.ParseString(options); + emscripten_builtin_free(options); +#else + parser.ParseString(GetEnv("LSAN_OPTIONS")); +#endif // SANITIZER_EMSCRIPTEN + +#if SANITIZER_EMSCRIPTEN + if (common_flags()->malloc_context_size <= 1) + StackTrace::snapshot_stack = false; +#endif // SANITIZER_EMSCRIPTEN InitializeCommonFlags(); @@ -98,7 +122,10 @@ extern "C" void __lsan_init() { InitTlsSize(); InitializeInterceptors(); InitializeThreadRegistry(); +#if !SANITIZER_EMSCRIPTEN + // Emscripten does not have signals InstallDeadlySignalHandlers(LsanOnDeadlySignal); +#endif InitializeMainThread(); InstallAtExitCheckLeaks(); diff --git a/compiler-rt/lib/lsan/lsan_allocator.cpp b/compiler-rt/lib/lsan/lsan_allocator.cpp index 43928ad294e2..39d1990b4ba3 100644 --- a/compiler-rt/lib/lsan/lsan_allocator.cpp +++ b/compiler-rt/lib/lsan/lsan_allocator.cpp @@ -26,9 +26,9 @@ extern "C" void *memset(void *ptr, int value, uptr num); namespace __lsan { -#if defined(__i386__) || defined(__arm__) +#if defined(__i386__) || defined(__arm__) || defined(__wasm32__) static const uptr kMaxAllowedMallocSize = 1ULL << 30; -#elif defined(__mips64) || defined(__aarch64__) +#elif defined(__mips64) || defined(__aarch64__) || defined(__wasm64__) static const uptr kMaxAllowedMallocSize = 4ULL << 30; #else static const uptr kMaxAllowedMallocSize = 8ULL << 30; diff --git a/compiler-rt/lib/lsan/lsan_common.cpp b/compiler-rt/lib/lsan/lsan_common.cpp index 94bb3cca0083..f8dd2760e3ee 100644 --- a/compiler-rt/lib/lsan/lsan_common.cpp +++ b/compiler-rt/lib/lsan/lsan_common.cpp @@ -25,6 +25,10 @@ #include "sanitizer_common/sanitizer_thread_registry.h" #include "sanitizer_common/sanitizer_tls_get_addr.h" +#if SANITIZER_EMSCRIPTEN +#include "lsan/lsan_allocator.h" +#endif + #if CAN_SANITIZE_LEAKS namespace __lsan { @@ -115,7 +119,7 @@ static const char kStdSuppressions[] = void InitializeSuppressions() { CHECK_EQ(nullptr, suppression_ctx); - suppression_ctx = new (suppression_placeholder) + suppression_ctx = new (suppression_placeholder) // NOLINT LeakSuppressionContext(kSuppressionTypes, ARRAY_SIZE(kSuppressionTypes)); } @@ -182,6 +186,14 @@ static uptr GetCallerPC(const StackTrace &stack) { // valid before reporting chunks as leaked. bool LeakSuppressionContext::SuppressInvalid(const StackTrace &stack) { uptr caller_pc = GetCallerPC(stack); +#if SANITIZER_EMSCRIPTEN + // caller_pr will always be 0 if we use malloc_context_size=0 (or 1) which + // we recommend under emscripten to save memory. It seems that this setting + // now (inadvertently?) suppreses all leaks. + // See https://reviews.llvm.org/D115319#3526676. + if (!caller_pc) + return false; +#endif // If caller_pc is unknown, this chunk may be allocated in a coroutine. Mark // it as reachable, as we can't properly report its allocation stack anyway. return !caller_pc || @@ -274,7 +286,16 @@ void ScanRangeForPointers(uptr begin, uptr end, Frontier *frontier, uptr pp = begin; if (pp % alignment) pp = pp + alignment - pp % alignment; - for (; pp + sizeof(void *) <= end; pp += alignment) { + + // Emscripten in non-threaded mode stores thread_local variables in the + // same place as normal globals. This means allocator_cache must be skipped + // when scanning globals instead of when scanning thread-locals. +#if SANITIZER_EMSCRIPTEN && !defined(__EMSCRIPTEN_PTHREADS__) + uptr cache_begin, cache_end; + GetAllocatorCacheRange(&cache_begin, &cache_end); +#endif + + for (; pp + sizeof(void *) <= end; pp += alignment) { // NOLINT void *p = *reinterpret_cast<void **>(pp); if (!MaybeUserPointer(reinterpret_cast<uptr>(p))) continue; @@ -298,6 +319,14 @@ void ScanRangeForPointers(uptr begin, uptr end, Frontier *frontier, continue; } +#if SANITIZER_EMSCRIPTEN && !defined(__EMSCRIPTEN_PTHREADS__) + if (cache_begin <= pp && pp < cache_end) { + LOG_POINTERS("%p: skipping because it overlaps the cache %p-%p.\n", + (void*)pp, (void*)cache_begin, (void*)cache_end); + continue; + } +#endif + m.set_tag(tag); LOG_POINTERS("%p: found %p pointing into chunk %p-%p of size %zu.\n", (void *)pp, p, (void *)chunk, @@ -363,6 +392,7 @@ static void ProcessThreadRegistry(Frontier *frontier) { } } +#if !SANITIZER_EMSCRIPTEN // Scans thread data (stacks and TLS) for heap pointers. static void ProcessThreads(SuspendedThreadsList const &suspended_threads, Frontier *frontier) { @@ -481,6 +511,7 @@ static void ProcessThreads(SuspendedThreadsList const &suspended_threads, // Add pointers reachable from ThreadContexts ProcessThreadRegistry(frontier); } +#endif // !SANITIZER_EMSCRIPTEN # endif // SANITIZER_FUCHSIA @@ -500,14 +531,22 @@ void ScanRootRegion(Frontier *frontier, const RootRegion &root_region, kReachable); } +#if SANITIZER_EMSCRIPTEN +extern "C" uptr emscripten_get_heap_size(); +#endif + static void ProcessRootRegion(Frontier *frontier, const RootRegion &root_region) { +#if SANITIZER_EMSCRIPTEN + ScanRootRegion(frontier, root_region, 0, emscripten_get_heap_size(), true); +#else MemoryMappingLayout proc_maps(/*cache_enabled*/ true); MemoryMappedSegment segment; while (proc_maps.Next(&segment)) { ScanRootRegion(frontier, root_region, segment.start, segment.end, segment.IsReadable()); } +#endif // SANITIZER_EMSCRIPTEN } // Scans root regions for heap pointers. @@ -676,7 +715,9 @@ static void CheckForLeaksCallback(const SuspendedThreadsList &suspended_threads, CheckForLeaksParam *param = reinterpret_cast<CheckForLeaksParam *>(arg); CHECK(param); CHECK(!param->success); +#if !SANITIZER_EMSCRIPTEN ReportUnsuspendedThreads(suspended_threads); +#endif ClassifyAllChunks(suspended_threads, ¶m->frontier); ForEachChunk(CollectLeaksCb, ¶m->leaks); // Clean up for subsequent leak checks. This assumes we did not overwrite any diff --git a/compiler-rt/lib/lsan/lsan_common.h b/compiler-rt/lib/lsan/lsan_common.h index d7153751faee..a9e445e45bdd 100644 --- a/compiler-rt/lib/lsan/lsan_common.h +++ b/compiler-rt/lib/lsan/lsan_common.h @@ -44,7 +44,7 @@ # define CAN_SANITIZE_LEAKS 1 #elif SANITIZER_RISCV64 && SANITIZER_LINUX # define CAN_SANITIZE_LEAKS 1 -#elif SANITIZER_NETBSD || SANITIZER_FUCHSIA +#elif SANITIZER_NETBSD || SANITIZER_FUCHSIA || SANITIZER_EMSCRIPTEN # define CAN_SANITIZE_LEAKS 1 #else # define CAN_SANITIZE_LEAKS 0 @@ -255,6 +255,10 @@ bool GetThreadRangesLocked(tid_t os_id, uptr *stack_begin, uptr *stack_end, void GetAllThreadAllocatorCachesLocked(InternalMmapVector<uptr> *caches); void ForEachExtraStackRange(tid_t os_id, RangeIteratorCallback callback, void *arg); +// Scans thread data (stacks and TLS) for heap pointers. +void ProcessThreads(SuspendedThreadsList const &suspended_threads, + Frontier *frontier); + // If called from the main thread, updates the main thread's TID in the thread // registry. We need this to handle processes that fork() without a subsequent // exec(), which invalidates the recorded TID. To update it, we must call diff --git a/compiler-rt/lib/lsan/lsan_common_linux.cpp b/compiler-rt/lib/lsan/lsan_common_linux.cpp index 692ad35169e1..20cc3a55d4be 100644 --- a/compiler-rt/lib/lsan/lsan_common_linux.cpp +++ b/compiler-rt/lib/lsan/lsan_common_linux.cpp @@ -15,7 +15,7 @@ #include "sanitizer_common/sanitizer_platform.h" #include "lsan_common.h" -#if CAN_SANITIZE_LEAKS && (SANITIZER_LINUX || SANITIZER_NETBSD) +#if CAN_SANITIZE_LEAKS && SANITIZER_LINUX #include <link.h> #include "sanitizer_common/sanitizer_common.h" diff --git a/compiler-rt/lib/lsan/lsan_interceptors.cpp b/compiler-rt/lib/lsan/lsan_interceptors.cpp index 3a1b2afdbb74..996cf50f8f09 100644 --- a/compiler-rt/lib/lsan/lsan_interceptors.cpp +++ b/compiler-rt/lib/lsan/lsan_interceptors.cpp @@ -32,6 +32,17 @@ #include "lsan_common.h" #include "lsan_thread.h" +#if SANITIZER_EMSCRIPTEN +#define __ATTRP_C11_THREAD ((void*)(uptr)-1) +#include <emscripten/heap.h> +extern "C" { +int emscripten_builtin_pthread_create(void *thread, void *attr, + void *(*callback)(void *), void *arg); +int emscripten_builtin_pthread_join(void *th, void **ret); +int emscripten_builtin_pthread_detach(void *th); +} +#endif + #include <stddef.h> using namespace __lsan; @@ -438,7 +449,11 @@ extern "C" void *__lsan_thread_start_func(void *arg) { while ((tid = atomic_load(&p->tid, memory_order_acquire)) == 0) internal_sched_yield(); ThreadStart(tid, GetTid()); +#if SANITIZER_EMSCRIPTEN + emscripten_builtin_free(p); +#else atomic_store(&p->tid, 0, memory_order_release); +#endif return callback(param); } @@ -447,17 +462,24 @@ INTERCEPTOR(int, pthread_create, void *th, void *attr, ENSURE_LSAN_INITED; EnsureMainThreadIDIsCorrect(); __sanitizer_pthread_attr_t myattr; - if (!attr) { + if (!attr || attr == __ATTRP_C11_THREAD) { pthread_attr_init(&myattr); attr = &myattr; } AdjustStackSize(attr); int detached = 0; pthread_attr_getdetachstate(attr, &detached); +#if SANITIZER_EMSCRIPTEN + ThreadParam *p = (ThreadParam *) emscripten_builtin_malloc(sizeof(ThreadParam)); + p->callback = callback; + p->param = param; + atomic_store(&p->tid, 0, memory_order_relaxed); +#else ThreadParam p; p.callback = callback; p.param = param; atomic_store(&p.tid, 0, memory_order_relaxed); +#endif int res; { // Ignore all allocations made by pthread_create: thread stack/TLS may be @@ -465,14 +487,22 @@ INTERCEPTOR(int, pthread_create, void *th, void *attr, // the linked list it's stored in doesn't even hold valid pointers to the // objects, the latter are calculated by obscure pointer arithmetic. ScopedInterceptorDisabler disabler; +#if SANITIZER_EMSCRIPTEN + res = REAL(pthread_create)(th, attr, __lsan_thread_start_func, p); +#else res = REAL(pthread_create)(th, attr, __lsan_thread_start_func, &p); +#endif } if (res == 0) { int tid = ThreadCreate(GetCurrentThread(), IsStateDetached(detached)); CHECK_NE(tid, kMainTid); +#if SANITIZER_EMSCRIPTEN + atomic_store(&p->tid, tid, memory_order_release); +#else atomic_store(&p.tid, tid, memory_order_release); while (atomic_load(&p.tid, memory_order_acquire) != 0) internal_sched_yield(); +#endif } if (attr == &myattr) pthread_attr_destroy(&myattr); @@ -485,6 +515,7 @@ INTERCEPTOR(int, pthread_join, void *t, void **arg) { DEFINE_REAL_PTHREAD_FUNCTIONS +#if !SANITIZER_EMSCRIPTEN INTERCEPTOR(void, _exit, int status) { if (status == 0 && HasReportedLeaks()) status = common_flags()->exitcode; REAL(_exit)(status); @@ -492,14 +523,14 @@ INTERCEPTOR(void, _exit, int status) { #define COMMON_INTERCEPT_FUNCTION(name) INTERCEPT_FUNCTION(name) #include "sanitizer_common/sanitizer_signal_interceptors.inc" - -#endif // SANITIZER_POSIX +#endif namespace __lsan { void InitializeInterceptors() { // Fuchsia doesn't use interceptors that require any setup. #if !SANITIZER_FUCHSIA +#if !SANITIZER_EMSCRIPTEN InitializeSignalInterceptors(); INTERCEPT_FUNCTION(malloc); @@ -528,6 +559,7 @@ void InitializeInterceptors() { LSAN_MAYBE_INTERCEPT_PTHREAD_ATFORK; LSAN_MAYBE_INTERCEPT_STRERROR; +#endif // !SANITIZER_EMSCRIPTEN #if !SANITIZER_NETBSD && !SANITIZER_FREEBSD if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) { @@ -540,3 +572,4 @@ void InitializeInterceptors() { } } // namespace __lsan +#endif // SANITIZER_EMSCRIPTEN diff --git a/compiler-rt/lib/lsan/lsan_linux.cpp b/compiler-rt/lib/lsan/lsan_linux.cpp index 47c2f21b5a6b..63ae2c1a945b 100644 --- a/compiler-rt/lib/lsan/lsan_linux.cpp +++ b/compiler-rt/lib/lsan/lsan_linux.cpp @@ -12,7 +12,7 @@ #include "sanitizer_common/sanitizer_platform.h" -#if SANITIZER_LINUX || SANITIZER_NETBSD || SANITIZER_FUCHSIA +#if SANITIZER_LINUX || SANITIZER_NETBSD || SANITIZER_FUCHSIA || SANITIZER_EMSCRIPTEN #include "lsan_allocator.h" @@ -29,4 +29,4 @@ void ReplaceSystemMalloc() {} } // namespace __lsan -#endif // SANITIZER_LINUX || SANITIZER_NETBSD || SANITIZER_FUCHSIA +#endif // SANITIZER_LINUX || SANITIZER_NETBSD || SANITIZER_FUCHSIA || SANITIZER_EMSCRIPTEN diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp index 8fd398564280..4c565c5a361b 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp @@ -79,6 +79,7 @@ void *BackgroundThread(void *arg) { } } +#if !SANITIZER_EMSCRIPTEN void MaybeStartBackgroudThread() { // Need to implement/test on other platforms. // Start the background thread if one of the rss limits is given. @@ -115,6 +116,7 @@ static struct BackgroudThreadStarted { #else void MaybeStartBackgroudThread() {} #endif +#endif void WriteToSyslog(const char *msg) { InternalScopedString msg_copy; diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_errno_codes.h b/compiler-rt/lib/sanitizer_common/sanitizer_errno_codes.h index 192e9392d494..650cf99128d7 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_errno_codes.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_errno_codes.h @@ -19,12 +19,15 @@ #ifndef SANITIZER_ERRNO_CODES_H #define SANITIZER_ERRNO_CODES_H +// XXX EMSCRIPTEN: use wasi errno codes, which is what our musl port now uses +#include <wasi/api.h> + namespace __sanitizer { -#define errno_ENOMEM 12 -#define errno_EBUSY 16 -#define errno_EINVAL 22 -#define errno_ENAMETOOLONG 36 +#define errno_ENOMEM __WASI_ERRNO_NOMEM +#define errno_EBUSY __WASI_ERRNO_BUSY +#define errno_EINVAL __WASI_ERRNO_INVAL +#define errno_ENAMETOOLONG __WASI_ERRNO_NAMETOOLONG // Those might not present or their value differ on different platforms. extern const int errno_EOWNERDEAD; diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h b/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h index 15738ff1e1bc..20d15f445221 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h @@ -139,7 +139,7 @@ namespace __sanitizer { typedef unsigned long long uptr; typedef signed long long sptr; #else -# if (SANITIZER_WORDSIZE == 64) || SANITIZER_APPLE || SANITIZER_WINDOWS +# if (SANITIZER_WORDSIZE == 64) || SANITIZER_APPLE || SANITIZER_WINDOWS || SANITIZER_EMSCRIPTEN typedef unsigned long uptr; typedef signed long sptr; # else @@ -190,7 +190,7 @@ typedef u64 OFF64_T; #if (SANITIZER_WORDSIZE == 64) || SANITIZER_APPLE typedef uptr operator_new_size_type; #else -# if defined(__s390__) && !defined(__s390x__) +# if defined(__s390__) && !defined(__s390x__) || SANITIZER_EMSCRIPTEN // Special case: 31-bit s390 has unsigned long as size_t. typedef unsigned long operator_new_size_type; # else diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp index dc2ea933fadc..0d9092364654 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp @@ -14,7 +14,7 @@ #include "sanitizer_platform.h" #if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD || \ - SANITIZER_SOLARIS + SANITIZER_SOLARIS || SANITIZER_EMSCRIPTEN #include "sanitizer_common.h" #include "sanitizer_flags.h" @@ -59,7 +59,7 @@ #include <signal.h> #include <sys/mman.h> #include <sys/param.h> -#if !SANITIZER_SOLARIS +#if !SANITIZER_SOLARIS && !SANITIZER_EMSCRIPTEN #include <sys/ptrace.h> #endif #include <sys/resource.h> @@ -108,9 +108,21 @@ extern struct ps_strings *__ps_strings; #define environ _environ #endif +#if SANITIZER_EMSCRIPTEN +#define weak __attribute__(__weak__) +#define hidden __attribute__((__visibility__("hidden"))) +#include <syscall.h> +#undef weak +#undef hidden +#include <emscripten/threading.h> +#include <math.h> +#include <wasi/api.h> +#include <wasi/wasi-helpers.h> +#endif + extern char **environ; -#if SANITIZER_LINUX +#if SANITIZER_LINUX || SANITIZER_EMSCRIPTEN // <linux/time.h> struct kernel_timeval { long tv_sec; @@ -200,7 +212,7 @@ ScopedBlockSignals::~ScopedBlockSignals() { SetSigProcMask(&saved_, nullptr); } // --------------- sanitizer_libc.h #if !SANITIZER_SOLARIS && !SANITIZER_NETBSD -#if !SANITIZER_S390 +#if !SANITIZER_S390 && !SANITIZER_EMSCRIPTEN uptr internal_mmap(void *addr, uptr length, int prot, int flags, int fd, u64 offset) { #if SANITIZER_FREEBSD || SANITIZER_LINUX_USES_64BIT_SYSCALLS @@ -213,8 +225,9 @@ uptr internal_mmap(void *addr, uptr length, int prot, int flags, int fd, offset / 4096); #endif } -#endif // !SANITIZER_S390 +#endif // !SANITIZER_S390 && !SANITIZER_NETBSD +#if !SANITIZER_EMSCRIPTEN uptr internal_munmap(void *addr, uptr length) { return internal_syscall(SYSCALL(munmap), (uptr)addr, length); } @@ -230,13 +243,18 @@ uptr internal_mremap(void *old_address, uptr old_size, uptr new_size, int flags, int internal_mprotect(void *addr, uptr length, int prot) { return internal_syscall(SYSCALL(mprotect), (uptr)addr, length, prot); } +#endif int internal_madvise(uptr addr, uptr length, int advice) { return internal_syscall(SYSCALL(madvise), addr, length, advice); } uptr internal_close(fd_t fd) { +#if SANITIZER_EMSCRIPTEN + return __wasi_fd_close(fd); +#else return internal_syscall(SYSCALL(close), fd); +#endif } uptr internal_open(const char *filename, int flags) { @@ -257,17 +275,35 @@ uptr internal_open(const char *filename, int flags, u32 mode) { } uptr internal_read(fd_t fd, void *buf, uptr count) { +#ifdef __EMSCRIPTEN__ + __wasi_iovec_t iov = { (uint8_t *)buf, count }; + size_t num; + if (__wasi_syscall_ret(__wasi_fd_read(fd, &iov, 1, &num))) { + return -1; + } + return num; +#else sptr res; HANDLE_EINTR(res, (sptr)internal_syscall(SYSCALL(read), fd, (uptr)buf, count)); return res; +#endif } uptr internal_write(fd_t fd, const void *buf, uptr count) { +#ifdef __EMSCRIPTEN__ + __wasi_ciovec_t iov = { (const uint8_t *)buf, count }; + size_t num; + if (__wasi_syscall_ret(__wasi_fd_write(fd, &iov, 1, &num))) { + return -1; + } + return num; +#else sptr res; HANDLE_EINTR(res, (sptr)internal_syscall(SYSCALL(write), fd, (uptr)buf, count)); return res; +#endif } uptr internal_ftruncate(fd_t fd, uptr size) { @@ -277,7 +313,7 @@ uptr internal_ftruncate(fd_t fd, uptr size) { return res; } -#if (!SANITIZER_LINUX_USES_64BIT_SYSCALLS || SANITIZER_SPARC) && SANITIZER_LINUX +#if (!SANITIZER_LINUX_USES_64BIT_SYSCALLS || SANITIZER_SPARC) && SANITIZER_LINUX || SANITIZER_EMSCRIPTEN static void stat64_to_stat(struct stat64 *in, struct stat *out) { internal_memset(out, 0, sizeof(*out)); out->st_dev = in->st_dev; @@ -467,7 +503,7 @@ uptr internal_dup(int oldfd) { } uptr internal_dup2(int oldfd, int newfd) { -# if SANITIZER_LINUX +# if SANITIZER_LINUX || SANITIZER_EMSCRIPTEN return internal_syscall(SYSCALL(dup3), oldfd, newfd, 0); #else return internal_syscall(SYSCALL(dup2), oldfd, newfd); @@ -504,26 +540,38 @@ uptr internal_rename(const char *oldpath, const char *newpath) { } uptr internal_sched_yield() { +#if SANITIZER_EMSCRIPTEN + return 0; +#else return internal_syscall(SYSCALL(sched_yield)); +#endif } void internal_usleep(u64 useconds) { +#if SANITIZER_EMSCRIPTEN + usleep(useconds); +#else struct timespec ts; ts.tv_sec = useconds / 1000000; ts.tv_nsec = (useconds % 1000000) * 1000; internal_syscall(SYSCALL(nanosleep), &ts, &ts); +#endif } +#if !SANITIZER_EMSCRIPTEN uptr internal_execve(const char *filename, char *const argv[], char *const envp[]) { return internal_syscall(SYSCALL(execve), (uptr)filename, (uptr)argv, (uptr)envp); } +#endif // !SANITIZER_EMSCRIPTEN #endif // !SANITIZER_SOLARIS && !SANITIZER_NETBSD #if !SANITIZER_NETBSD void internal__exit(int exitcode) { -#if SANITIZER_FREEBSD || SANITIZER_SOLARIS +#if SANITIZER_EMSCRIPTEN + __wasi_proc_exit(exitcode); +#elif SANITIZER_FREEBSD || SANITIZER_SOLARIS internal_syscall(SYSCALL(exit), exitcode); #else internal_syscall(SYSCALL(exit_group), exitcode); @@ -558,11 +606,14 @@ tid_t GetTid() { return Tid; #elif SANITIZER_SOLARIS return thr_self(); +#elif SANITIZER_EMSCRIPTEN + return (tid_t) pthread_self(); #else return internal_syscall(SYSCALL(gettid)); #endif } +#if !SANITIZER_EMSCRIPTEN int TgKill(pid_t pid, tid_t tid, int sig) { #if SANITIZER_LINUX return internal_syscall(SYSCALL(tgkill), pid, tid, sig); @@ -574,6 +625,7 @@ int TgKill(pid_t pid, tid_t tid, int sig) { #endif } #endif +#endif #if SANITIZER_GLIBC u64 NanoTime() { @@ -594,11 +646,21 @@ u64 NanoTime() { } #endif +#if SANITIZER_EMSCRIPTEN +extern "C" { +int __clock_gettime(__sanitizer_clockid_t clk_id, void *tp); +} + +uptr internal_clock_gettime(__sanitizer_clockid_t clk_id, void *tp) { + return __clock_gettime(clk_id, tp); +} +#endif + // Like getenv, but reads env directly from /proc (on Linux) or parses the // 'environ' array (on some others) and does not use libc. This function // should be called first inside __asan_init. const char *GetEnv(const char *name) { -#if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_SOLARIS +#if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_SOLARIS || SANITIZER_EMSCRIPTEN if (::environ != 0) { uptr NameLen = internal_strlen(name); for (char **Env = ::environ; *Env != 0; Env++) { @@ -667,6 +729,7 @@ static void ReadNullSepFileToArray(const char *path, char ***arr, } #endif +#if !SANITIZER_EMSCRIPTEN static void GetArgsAndEnv(char ***argv, char ***envp) { #if SANITIZER_FREEBSD // On FreeBSD, retrieving the argument and environment arrays is done via the @@ -718,12 +781,16 @@ char **GetEnviron() { return envp; } +#endif // !SANITIZER_EMSCRIPTEN + #if !SANITIZER_SOLARIS void FutexWait(atomic_uint32_t *p, u32 cmp) { # if SANITIZER_FREEBSD _umtx_op(p, UMTX_OP_WAIT_UINT, cmp, 0, 0); # elif SANITIZER_NETBSD sched_yield(); /* No userspace futex-like synchronization */ +# elif SANITIZER_EMSCRIPTEN + emscripten_futex_wait(p, cmp, INFINITY); # else internal_syscall(SYSCALL(futex), (uptr)p, FUTEX_WAIT_PRIVATE, cmp, 0, 0, 0); # endif @@ -734,6 +801,8 @@ void FutexWake(atomic_uint32_t *p, u32 count) { _umtx_op(p, UMTX_OP_WAKE, count, 0, 0); # elif SANITIZER_NETBSD /* No userspace futex-like synchronization */ +# elif SANITIZER_EMSCRIPTEN + emscripten_futex_wake(p, count); # else internal_syscall(SYSCALL(futex), (uptr)p, FUTEX_WAKE_PRIVATE, count, 0, 0, 0); # endif @@ -765,11 +834,13 @@ struct linux_dirent { #endif #if !SANITIZER_SOLARIS && !SANITIZER_NETBSD +#if !SANITIZER_EMSCRIPTEN // Syscall wrappers. uptr internal_ptrace(int request, int pid, void *addr, void *data) { return internal_syscall(SYSCALL(ptrace), request, pid, (uptr)addr, (uptr)data); } +#endif uptr internal_waitpid(int pid, int *status, int options) { return internal_syscall(SYSCALL(wait4), pid, (uptr)status, options, @@ -803,7 +874,12 @@ uptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count) { } uptr internal_lseek(fd_t fd, OFF_T offset, int whence) { +#if SANITIZER_EMSCRIPTEN + __wasi_filesize_t result; + return __wasi_syscall_ret(__wasi_fd_seek(fd, offset, whence, &result)) ? -1 : result; +#else return internal_syscall(SYSCALL(lseek), fd, offset, whence); +#endif } #if SANITIZER_LINUX @@ -819,11 +895,17 @@ uptr internal_arch_prctl(int option, uptr arg2) { # endif # endif +#if !SANITIZER_EMSCRIPTEN uptr internal_sigaltstack(const void *ss, void *oss) { return internal_syscall(SYSCALL(sigaltstack), (uptr)ss, (uptr)oss); } +#endif int internal_fork() { +#if SANITIZER_EMSCRIPTEN + Report("fork not supported on emscripten\n"); + return -1; +#else # if SANITIZER_LINUX # if SANITIZER_S390 return internal_syscall(SYSCALL(clone), 0, SIGCHLD); @@ -833,6 +915,7 @@ int internal_fork() { # else return internal_syscall(SYSCALL(fork)); # endif +#endif } #if SANITIZER_FREEBSD @@ -923,6 +1006,8 @@ uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set, __sanitizer_sigset_t *oldset) { #if SANITIZER_FREEBSD return internal_syscall(SYSCALL(sigprocmask), how, set, oldset); +#elif SANITIZER_EMSCRIPTEN + return NULL; #else __sanitizer_kernel_sigset_t *k_set = (__sanitizer_kernel_sigset_t *)set; __sanitizer_kernel_sigset_t *k_oldset = (__sanitizer_kernel_sigset_t *)oldset; @@ -976,7 +1061,7 @@ bool internal_sigismember(__sanitizer_sigset_t *set, int signum) { #endif #endif // !SANITIZER_SOLARIS -#if !SANITIZER_NETBSD +#if !SANITIZER_NETBSD && !SANITIZER_EMSCRIPTEN // ThreadLister implementation. ThreadLister::ThreadLister(pid_t pid) : pid_(pid), buffer_(4096) { char task_directory_path[80]; @@ -1157,19 +1242,23 @@ uptr GetPageSize() { int rv = internal_sysctl(mib, 2, &pz, &pzl, nullptr, 0); CHECK_EQ(rv, 0); return (uptr)pz; -#elif SANITIZER_USE_GETAUXVAL - return getauxval(AT_PAGESZ); #else return sysconf(_SC_PAGESIZE); // EXEC_PAGESIZE may not be trustworthy. #endif } #endif // !SANITIZER_ANDROID +#if SANITIZER_EMSCRIPTEN +extern "C" uptr emscripten_get_module_name(char *buf, uptr buf_len); +#endif + uptr ReadBinaryName(/*out*/char *buf, uptr buf_len) { #if SANITIZER_SOLARIS const char *default_module_name = getexecname(); CHECK_NE(default_module_name, NULL); return internal_snprintf(buf, buf_len, "%s", default_module_name); +#elif SANITIZER_EMSCRIPTEN + return emscripten_get_module_name(buf, buf_len); #else #if SANITIZER_FREEBSD || SANITIZER_NETBSD #if SANITIZER_FREEBSD @@ -1831,7 +1920,7 @@ HandleSignalMode GetHandleSignalMode(int signum) { return result; } -#if !SANITIZER_GO +#if !SANITIZER_GO && !SANITIZER_EMSCRIPTEN void *internal_start_thread(void *(*func)(void *arg), void *arg) { if (&real_pthread_create == 0) return nullptr; @@ -2228,6 +2317,9 @@ static void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) { *pc = ucontext->uc_mcontext.__pc; *bp = ucontext->uc_mcontext.__gregs[22]; *sp = ucontext->uc_mcontext.__gregs[3]; +#elif SANITIZER_EMSCRIPTEN + Report("GetPcSpBp not implemented on emscripten"); + Abort(); # else # error "Unsupported arch" # endif diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux.h b/compiler-rt/lib/sanitizer_common/sanitizer_linux.h index 761c57d1b8eb..b7c03e6d6043 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_linux.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_linux.h @@ -14,7 +14,7 @@ #include "sanitizer_platform.h" #if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD || \ - SANITIZER_SOLARIS + SANITIZER_SOLARIS || SANITIZER_EMSCRIPTEN #include "sanitizer_common.h" #include "sanitizer_internal_defs.h" #include "sanitizer_platform_limits_freebsd.h" diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp index d74851c43e14..7605e730ddb6 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp @@ -925,6 +925,7 @@ u64 MonotonicNanoTime() { } #endif // SANITIZER_GLIBC && !SANITIZER_GO +#if !SANITIZER_EMSCRIPTEN void ReExec() { const char *pathname = "/proc/self/exe"; @@ -956,6 +957,7 @@ void ReExec() { Printf("execve failed, errno %d\n", rverrno); Die(); } +#endif void UnmapFromTo(uptr from, uptr to) { if (to == from) diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_platform.h b/compiler-rt/lib/sanitizer_common/sanitizer_platform.h index 32005eef08cd..b4b43922f520 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_platform.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_platform.h @@ -14,7 +14,7 @@ #if !defined(__linux__) && !defined(__FreeBSD__) && !defined(__NetBSD__) && \ !defined(__APPLE__) && !defined(_WIN32) && !defined(__Fuchsia__) && \ - !(defined(__sun__) && defined(__svr4__)) + !(defined(__sun__) && defined(__svr4__)) && !defined(__EMSCRIPTEN__) # error "This operating system is not supported" #endif @@ -136,9 +136,15 @@ # define SANITIZER_MUSL 0 #endif +#if defined(__EMSCRIPTEN__) +# define SANITIZER_EMSCRIPTEN 1 +#else +# define SANITIZER_EMSCRIPTEN 0 +#endif + #define SANITIZER_POSIX \ (SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_APPLE || \ - SANITIZER_NETBSD || SANITIZER_SOLARIS) + SANITIZER_NETBSD || SANITIZER_SOLARIS || SANITIZER_EMSCRIPTEN) #if __LP64__ || defined(_WIN64) # define SANITIZER_WORDSIZE 64 diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h b/compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h index ffa7e272b7e0..798abfc6c59c 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h @@ -132,12 +132,24 @@ #define SI_POSIX_NOT_MAC 0 #endif +#if SANITIZER_POSIX && !SANITIZER_EMSCRIPTEN +# define SI_POSIX_NOT_EMSCRIPTEN 1 +#else +# define SI_POSIX_NOT_EMSCRIPTEN 0 +#endif + #if SANITIZER_LINUX && !SANITIZER_FREEBSD #define SI_LINUX_NOT_FREEBSD 1 #else #define SI_LINUX_NOT_FREEBSD 0 #endif +#if SANITIZER_EMSCRIPTEN +# define SI_EMSCRIPTEN 1 +#else +# define SI_EMSCRIPTEN 0 +#endif + #define SANITIZER_INTERCEPT_STRLEN SI_NOT_FUCHSIA #define SANITIZER_INTERCEPT_STRNLEN (SI_NOT_MAC && SI_NOT_FUCHSIA) #define SANITIZER_INTERCEPT_STRCMP SI_NOT_FUCHSIA @@ -265,7 +277,7 @@ #define SANITIZER_INTERCEPT_SENDMMSG SI_LINUX #define SANITIZER_INTERCEPT_SYSMSG SI_LINUX_NOT_ANDROID #define SANITIZER_INTERCEPT_GETPEERNAME SI_POSIX -#define SANITIZER_INTERCEPT_IOCTL SI_POSIX +#define SANITIZER_INTERCEPT_IOCTL SI_POSIX && !SI_EMSCRIPTEN #define SANITIZER_INTERCEPT_INET_ATON SI_POSIX #define SANITIZER_INTERCEPT_SYSINFO SI_LINUX #define SANITIZER_INTERCEPT_READDIR SI_POSIX @@ -303,7 +315,7 @@ (SI_FREEBSD || SI_NETBSD || SI_MAC || SI_LINUX_NOT_ANDROID || SI_SOLARIS) #define SANITIZER_INTERCEPT_SCHED_GETAFFINITY SI_LINUX_NOT_ANDROID #define SANITIZER_INTERCEPT_SCHED_GETPARAM SI_LINUX_NOT_ANDROID || SI_SOLARIS -#define SANITIZER_INTERCEPT_STRERROR SI_POSIX +#define SANITIZER_INTERCEPT_STRERROR SI_POSIX_NOT_EMSCRIPTEN #define SANITIZER_INTERCEPT_STRERROR_R SI_POSIX #define SANITIZER_INTERCEPT_XPG_STRERROR_R SI_LINUX_NOT_ANDROID #define SANITIZER_INTERCEPT_SCANDIR \ @@ -485,7 +497,7 @@ #define SANITIZER_INTERCEPT_MMAP SI_POSIX #define SANITIZER_INTERCEPT_MMAP64 SI_LINUX_NOT_ANDROID || SI_SOLARIS -#define SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO (SI_GLIBC || SI_ANDROID) +#define SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO (SI_GLIBC || SI_ANDROID || SI_EMSCRIPTEN) #define SANITIZER_INTERCEPT_MEMALIGN (!SI_FREEBSD && !SI_MAC && !SI_NETBSD) #define SANITIZER_INTERCEPT___LIBC_MEMALIGN SI_GLIBC #define SANITIZER_INTERCEPT_PVALLOC (SI_GLIBC || SI_ANDROID) diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp index c85cf1626a75..010b5c41c5eb 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp @@ -11,7 +11,7 @@ // Sizes and layouts of platform-specific POSIX data structures. //===----------------------------------------------------------------------===// -#if defined(__linux__) || defined(__APPLE__) +#if defined(__linux__) || defined(__APPLE__) || defined(__EMSCRIPTEN__) // Tests in this file assume that off_t-dependent data structures match the // libc ABI. For example, struct dirent here is what readdir() function (as // exported from libc) returns, and not the user-facing "dirent", which @@ -23,7 +23,7 @@ // Must go after undef _FILE_OFFSET_BITS. #include "sanitizer_platform.h" -#if SANITIZER_LINUX || SANITIZER_APPLE +#if SANITIZER_LINUX || SANITIZER_APPLE || SANITIZER_EMSCRIPTEN // Must go after undef _FILE_OFFSET_BITS. #include "sanitizer_glibc_version.h" @@ -59,7 +59,7 @@ #include <net/route.h> #endif -#if !SANITIZER_ANDROID +#if !SANITIZER_ANDROID && !SANITIZER_EMSCRIPTEN #include <sys/mount.h> #include <sys/timeb.h> #include <utmpx.h> @@ -160,7 +160,7 @@ typedef struct user_fpregs elf_fpregset_t; #include <sys/vfs.h> #include <sys/epoll.h> #include <linux/capability.h> -#else +#elif !SANITIZER_EMSCRIPTEN #include <fstab.h> #endif // SANITIZER_LINUX @@ -218,7 +218,7 @@ namespace __sanitizer { unsigned struct_fstab_sz = sizeof(struct fstab); #endif // SANITIZER_GLIBC || SANITIZER_FREEBSD || SANITIZER_NETBSD || // SANITIZER_APPLE -#if !SANITIZER_ANDROID +#if !SANITIZER_ANDROID && !SANITIZER_EMSCRIPTEN unsigned struct_statfs_sz = sizeof(struct statfs); unsigned struct_sockaddr_sz = sizeof(struct sockaddr); @@ -440,7 +440,10 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr); // ioctl arguments unsigned struct_ifreq_sz = sizeof(struct ifreq); unsigned struct_termios_sz = sizeof(struct termios); + +#if !SANITIZER_EMSCRIPTEN unsigned struct_winsize_sz = sizeof(struct winsize); +#endif #if SANITIZER_LINUX unsigned struct_arpreq_sz = sizeof(struct arpreq); @@ -521,15 +524,18 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr); unsigned struct_ppp_stats_sz = sizeof(struct ppp_stats); #endif // SANITIZER_GLIBC -#if !SANITIZER_ANDROID && !SANITIZER_APPLE +#if !SANITIZER_ANDROID && !SANITIZER_APPLE && !SANITIZER_EMSCRIPTEN unsigned struct_sioc_sg_req_sz = sizeof(struct sioc_sg_req); unsigned struct_sioc_vif_req_sz = sizeof(struct sioc_vif_req); #endif +#if !SANITIZER_EMSCRIPTEN const unsigned long __sanitizer_bufsiz = BUFSIZ; +#endif const unsigned IOCTL_NOT_PRESENT = 0; +#if !SANITIZER_EMSCRIPTEN unsigned IOCTL_FIOASYNC = FIOASYNC; unsigned IOCTL_FIOCLEX = FIOCLEX; unsigned IOCTL_FIOGETOWN = FIOGETOWN; @@ -578,6 +584,7 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr); unsigned IOCTL_SIOCGETSGCNT = SIOCGETSGCNT; unsigned IOCTL_SIOCGETVIFCNT = SIOCGETVIFCNT; #endif +#endif #if SANITIZER_LINUX unsigned IOCTL_EVIOCGABS = EVIOCGABS(0); @@ -1079,6 +1086,7 @@ CHECK_SIZE_AND_OFFSET(mmsghdr, msg_len); #endif COMPILER_CHECK(sizeof(__sanitizer_dirent) <= sizeof(dirent)); +#if !SANITIZER_EMSCRIPTEN CHECK_SIZE_AND_OFFSET(dirent, d_ino); #if SANITIZER_APPLE CHECK_SIZE_AND_OFFSET(dirent, d_seekoff); @@ -1088,6 +1096,7 @@ CHECK_SIZE_AND_OFFSET(dirent, d_seekoff); CHECK_SIZE_AND_OFFSET(dirent, d_off); #endif CHECK_SIZE_AND_OFFSET(dirent, d_reclen); +#endif // !SANITIZER_EMSCRIPTEN #if SANITIZER_LINUX && !SANITIZER_ANDROID COMPILER_CHECK(sizeof(__sanitizer_dirent64) <= sizeof(dirent64)); @@ -1107,6 +1116,7 @@ CHECK_SIZE_AND_OFFSET(pollfd, revents); CHECK_TYPE_SIZE(nfds_t); +#if !SANITIZER_EMSCRIPTEN CHECK_TYPE_SIZE(sigset_t); COMPILER_CHECK(sizeof(__sanitizer_sigaction) == sizeof(struct sigaction)); @@ -1121,6 +1131,7 @@ CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_flags); #if SANITIZER_LINUX && (!SANITIZER_ANDROID || !SANITIZER_MIPS32) CHECK_STRUCT_SIZE_AND_OFFSET(sigaction, sa_restorer); #endif +#endif // !SANITIZER_EMSCRIPTEN #if SANITIZER_LINUX CHECK_TYPE_SIZE(__sysctl_args); @@ -1174,7 +1185,9 @@ CHECK_SIZE_AND_OFFSET(mntent, mnt_freq); CHECK_SIZE_AND_OFFSET(mntent, mnt_passno); #endif +#if !SANITIZER_EMSCRIPTEN CHECK_TYPE_SIZE(ether_addr); +#endif #if SANITIZER_GLIBC || SANITIZER_FREEBSD CHECK_TYPE_SIZE(ipc_perm); @@ -1212,7 +1225,7 @@ CHECK_TYPE_SIZE(clock_t); CHECK_TYPE_SIZE(clockid_t); #endif -#if !SANITIZER_ANDROID +#if !SANITIZER_ANDROID && !SANITIZER_EMSCRIPTEN CHECK_TYPE_SIZE(ifaddrs); CHECK_SIZE_AND_OFFSET(ifaddrs, ifa_next); CHECK_SIZE_AND_OFFSET(ifaddrs, ifa_name); @@ -1242,7 +1255,7 @@ CHECK_SIZE_AND_OFFSET(ifaddrs, ifa_data); COMPILER_CHECK(sizeof(__sanitizer_struct_mallinfo) == sizeof(struct mallinfo)); #endif -#if !SANITIZER_ANDROID +#if !SANITIZER_ANDROID && !SANITIZER_EMSCRIPTEN CHECK_TYPE_SIZE(timeb); CHECK_SIZE_AND_OFFSET(timeb, time); CHECK_SIZE_AND_OFFSET(timeb, millitm); diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h index bd5692ed511b..706ee17fcc7f 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h @@ -14,7 +14,7 @@ #ifndef SANITIZER_PLATFORM_LIMITS_POSIX_H #define SANITIZER_PLATFORM_LIMITS_POSIX_H -#if SANITIZER_LINUX || SANITIZER_APPLE +#if SANITIZER_LINUX || SANITIZER_APPLE || SANITIZER_EMSCRIPTEN #include "sanitizer_internal_defs.h" #include "sanitizer_platform.h" @@ -452,7 +452,8 @@ struct __sanitizer_file_handle { }; #endif -#if SANITIZER_APPLE +// These fields are not actually pointers, and so wasm64 must use unsigned and not uptr for them +#if SANITIZER_APPLE || SANITIZER_EMSCRIPTEN struct __sanitizer_msghdr { void *msg_name; unsigned msg_namelen; @@ -532,7 +533,7 @@ typedef long long __sanitizer_clock_t; typedef long __sanitizer_clock_t; #endif -#if SANITIZER_LINUX +#if SANITIZER_LINUX || SANITIZER_EMSCRIPTEN typedef int __sanitizer_clockid_t; #endif @@ -585,6 +586,8 @@ struct __sanitizer_sigset_t { // The size is determined by looking at sizeof of real sigset_t on linux. uptr val[128 / sizeof(uptr)]; }; +#elif SANITIZER_EMSCRIPTEN +typedef unsigned long __sanitizer_sigset_t; #endif struct __sanitizer_siginfo { diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_posix.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_posix.cpp index b0e32b50c076..d795b523fe1f 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_posix.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_posix.cpp @@ -94,12 +94,18 @@ void *MmapAlignedOrDieOnFatalError(uptr size, uptr alignment, uptr res = map_res; if (!IsAligned(res, alignment)) { res = (map_res + alignment - 1) & ~(alignment - 1); +#ifndef SANITIZER_EMSCRIPTEN + // Emscripten's fake mmap doesn't support partial unmapping UnmapOrDie((void*)map_res, res - map_res); +#endif } +#ifndef SANITIZER_EMSCRIPTEN + // Emscripten's fake mmap doesn't support partial unmapping uptr end = res + size; end = RoundUpTo(end, GetPageSizeCached()); if (end != map_end) UnmapOrDie((void*)end, map_end - end); +#endif return (void*)res; } @@ -142,11 +148,19 @@ void *MmapFixedOrDieOnFatalError(uptr fixed_addr, uptr size, const char *name) { } bool MprotectNoAccess(uptr addr, uptr size) { +#if SANITIZER_EMSCRIPTEN + return true; +#else return 0 == internal_mprotect((void*)addr, size, PROT_NONE); +#endif } bool MprotectReadOnly(uptr addr, uptr size) { +#if SANITIZER_EMSCRIPTEN + return true; +#else return 0 == internal_mprotect((void *)addr, size, PROT_READ); +#endif } #if !SANITIZER_APPLE @@ -223,6 +237,16 @@ static inline bool IntervalsAreSeparate(uptr start1, uptr end1, return (end1 < start2) || (end2 < start1); } +#if SANITIZER_EMSCRIPTEN +bool MemoryRangeIsAvailable(uptr /*range_start*/, uptr /*range_end*/) { + // TODO: actually implement this. + return true; +} + +void DumpProcessMap() { + Report("Cannot dump memory map on emscripten"); +} +#else // FIXME: this is thread-unsafe, but should not cause problems most of the time. // When the shadow is mapped only a single thread usually exists (plus maybe // several worker threads on Mac, which aren't expected to map big chunks of @@ -257,6 +281,7 @@ void DumpProcessMap() { UnmapOrDie(filename, kBufSize); } #endif +#endif const char *GetPwd() { return GetEnv("PWD"); @@ -277,6 +302,10 @@ void ReportFile::Write(const char *buffer, uptr length) { } bool GetCodeRangeForFile(const char *module, uptr *start, uptr *end) { +#if SANITIZER_EMSCRIPTEN + // Code is not mapped in memory in Emscripten, so this operation is meaningless + // and thus always fails. +#else MemoryMappingLayout proc_maps(/*cache_enabled*/false); InternalMmapVector<char> buff(kMaxPathLength); MemoryMappedSegment segment(buff.data(), buff.size()); @@ -288,6 +317,7 @@ bool GetCodeRangeForFile(const char *module, uptr *start, uptr *end) { return true; } } +#endif return false; } diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp index 46e41c669738..b545453641fc 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp @@ -209,7 +209,9 @@ void InstallDeadlySignalHandlers(SignalHandlerType handler) { // Set the alternate signal stack for the main thread. // This will cause SetAlternateSignalStack to be called twice, but the stack // will be actually set only once. +#if !SANITIZER_EMSCRIPTEN if (common_flags()->use_sigaltstack) SetAlternateSignalStack(); +#endif MaybeInstallSigaction(SIGSEGV, handler); MaybeInstallSigaction(SIGBUS, handler); MaybeInstallSigaction(SIGABRT, handler); @@ -269,6 +271,11 @@ bool SignalContext::IsStackOverflow() const { #endif // SANITIZER_GO bool IsAccessibleMemoryRange(uptr beg, uptr size) { +#if SANITIZER_EMSCRIPTEN + // Avoid pulling in __sys_pipe for the trick below, which doesn't work on + // WebAssembly anyways because there are no memory protections. + return true; +#else uptr page_size = GetPageSizeCached(); // Checking too large memory ranges is slow. CHECK_LT(size, page_size * 10); @@ -288,6 +295,7 @@ bool IsAccessibleMemoryRange(uptr beg, uptr size) { internal_close(sock_pair[0]); internal_close(sock_pair[1]); return result; +#endif // SANITIZER_EMSCRIPTEN } void PlatformPrepareForSandboxing(void *args) { @@ -295,7 +303,9 @@ void PlatformPrepareForSandboxing(void *args) { // to read the file mappings from /proc/self/maps. Luckily, neither the // process will be able to load additional libraries, so it's fine to use the // cached mappings. +#ifndef SANITIZER_EMSCRIPTEN MemoryMappingLayout::CacheMemoryMappings(); +#endif } static bool MmapFixed(uptr fixed_addr, uptr size, int additional_flags, @@ -419,6 +429,7 @@ void AdjustStackSize(void *attr_) { } #endif // !SANITIZER_GO +#if !SANITIZER_EMSCRIPTEN pid_t StartSubprocess(const char *program, const char *const argv[], const char *const envp[], fd_t stdin_fd, fd_t stdout_fd, fd_t stderr_fd) { @@ -493,6 +504,7 @@ int WaitForProcess(pid_t pid) { } return process_status; } +#endif bool IsStateDetached(int state) { return state == PTHREAD_CREATE_DETACHED; diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cpp index d24fae98213a..548a298930ef 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cpp @@ -53,9 +53,11 @@ uptr StackTrace::GetNextInstructionPc(uptr pc) { #endif } +#if !defined(__EMSCRIPTEN__) uptr StackTrace::GetCurrentPc() { return GET_CALLER_PC(); } +#endif void BufferedStackTrace::Init(const uptr *pcs, uptr cnt, uptr extra_top_pc) { size = cnt + !!extra_top_pc; @@ -66,8 +68,8 @@ void BufferedStackTrace::Init(const uptr *pcs, uptr cnt, uptr extra_top_pc) { top_frame_bp = 0; } -// Sparc implementation is in its own file. -#if !defined(__sparc__) +// Sparc and Emscripten implementions are in their own files. +#if !defined(__sparc__) && !defined(__EMSCRIPTEN__) // In GCC on ARM bp points to saved lr, not fp, so we should check the next // cell in stack to be a saved frame pointer. GetCanonicFrame returns the diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h index ee996c3e07ea..23acbff79c66 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.h @@ -33,7 +33,7 @@ static const u32 kStackTraceMax = 255; // Fast unwind is the only option on Mac for now; we will need to // revisit this macro when slow unwind works on Mac, see // https://github.com/google/sanitizers/issues/137 -#if SANITIZER_APPLE +#if SANITIZER_APPLE || SANITIZER_EMSCRIPTEN # define SANITIZER_CAN_SLOW_UNWIND 0 #else # define SANITIZER_CAN_SLOW_UNWIND 1 @@ -75,6 +75,9 @@ struct StackTrace { return request_fast_unwind; } +#if SANITIZER_EMSCRIPTEN + static bool snapshot_stack; +#endif static uptr GetCurrentPc(); static inline uptr GetPreviousInstructionPc(uptr pc); static uptr GetNextInstructionPc(uptr pc); diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cpp index 47983ee7ec71..bf160f0d5d0e 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cpp @@ -103,9 +103,15 @@ void StackTrace::PrintTo(InternalScopedString *output) const { } for (uptr i = 0; i < size && trace[i]; i++) { +#if !SANITIZER_EMSCRIPTEN // PCs in stack traces are actually the return addresses, that is, // addresses of the next instructions after the call. uptr pc = GetPreviousInstructionPc(trace[i]); +#else + // On Emscripten, the stack traces are obtained from JavaScript, and the + // addresses are not return addresses. + uptr pc = trace[i]; +#endif CHECK(printer.ProcessAddressFrames(pc)); } diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_internal.h b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_internal.h index 29a08386d0b9..6dcd8a2c58a2 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_internal.h +++ b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_internal.h @@ -74,6 +74,7 @@ class SymbolizerTool { ~SymbolizerTool() {} }; +#if !SANITIZER_EMSCRIPTEN // SymbolizerProcess encapsulates communication between the tool and // external symbolizer program, running in a different subprocess. // SymbolizerProcess may not be used from two threads simultaneously. @@ -145,6 +146,7 @@ class LLVMSymbolizer final : public SymbolizerTool { static const uptr kBufferSize = 16 * 1024; char buffer_[kBufferSize]; }; +#endif // Parses one or more two-line strings in the following format: // <function_name> diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp index 461fe9661368..637f80b299d1 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp @@ -224,6 +224,7 @@ const LoadedModule *Symbolizer::FindModuleForAddress(uptr address) { return module; } +#if !SANITIZER_EMSCRIPTEN // For now we assume the following protocol: // For each request of the form // <module_name> <module_offset> @@ -560,6 +561,7 @@ bool SymbolizerProcess::WriteToSymbolizer(const char *buffer, uptr length) { } return true; } +#endif #endif // !SANITIZER_SYMBOLIZER_MARKUP diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cpp index b223f6cd01e3..7a74f925a17d 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cpp @@ -12,7 +12,7 @@ //===----------------------------------------------------------------------===// #include "sanitizer_platform.h" -#if SANITIZER_POSIX +#if SANITIZER_POSIX && !SANITIZER_EMSCRIPTEN #include "sanitizer_allocator_internal.h" #include "sanitizer_common.h" #include "sanitizer_file.h" @@ -200,6 +200,7 @@ bool SymbolizerProcess::StartSymbolizerSubprocess() { return true; } +#if !SANITIZER_EMSCRIPTEN class Addr2LineProcess final : public SymbolizerProcess { public: Addr2LineProcess(const char *path, const char *module_name) @@ -315,6 +316,7 @@ class Addr2LinePool final : public SymbolizerTool { static const uptr dummy_address_ = FIRST_32_SECOND_64(UINT32_MAX, UINT64_MAX); }; +#endif # if SANITIZER_SUPPORTS_WEAK_HOOKS extern "C" { diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp index d5c028e3640d..eab54d37e941 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp +++ b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp @@ -40,7 +40,21 @@ void ReportErrorSummary(const char *error_type, const AddressInfo &info, } #endif -#if !SANITIZER_FUCHSIA +#if SANITIZER_EMSCRIPTEN +#include <emscripten/em_asm.h> + +static inline bool ReportSupportsColors() { + return !!EM_ASM_INT({ + var setting = Module['printWithColors']; + if (setting != null) { + return setting; + } else { + return ENVIRONMENT_IS_NODE && process.stderr.isTTY; + } + }); +} + +#elif !SANITIZER_FUCHSIA bool ReportFile::SupportsColors() { SpinMutexLock l(mu); @@ -57,7 +71,7 @@ static inline bool ReportSupportsColors() { // Fuchsia's logs always go through post-processing that handles colorization. static inline bool ReportSupportsColors() { return true; } -#endif // !SANITIZER_FUCHSIA +#endif // SANITIZER_EMSCRIPTEN, !SANITIZER_FUCHSIA bool ColorizeReports() { // FIXME: Add proper Windows support to AnsiColorDecorator and re-enable color diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_syscall_generic.inc b/compiler-rt/lib/sanitizer_common/sanitizer_syscall_generic.inc index e7f95d33ad0d..ae2cea517c1f 100644 --- a/compiler-rt/lib/sanitizer_common/sanitizer_syscall_generic.inc +++ b/compiler-rt/lib/sanitizer_common/sanitizer_syscall_generic.inc @@ -13,7 +13,7 @@ // NetBSD uses libc calls directly #if !SANITIZER_NETBSD -#if SANITIZER_FREEBSD || SANITIZER_APPLE || SANITIZER_SOLARIS +#if SANITIZER_FREEBSD || SANITIZER_APPLE || SANITIZER_SOLARIS || SANITIZER_EMSCRIPTEN # define SYSCALL(name) SYS_ ## name #else # define SYSCALL(name) __NR_ ## name diff --git a/compiler-rt/lib/ubsan/ubsan_checks.inc b/compiler-rt/lib/ubsan/ubsan_checks.inc index 846cd89ee19f..4e0c2bcf0e65 100644 --- a/compiler-rt/lib/ubsan/ubsan_checks.inc +++ b/compiler-rt/lib/ubsan/ubsan_checks.inc @@ -20,11 +20,6 @@ UBSAN_CHECK(GenericUB, "undefined-behavior", "undefined") UBSAN_CHECK(NullPointerUse, "null-pointer-use", "null") UBSAN_CHECK(NullPointerUseWithNullability, "null-pointer-use", "nullability-assign") -UBSAN_CHECK(NullptrWithOffset, "nullptr-with-offset", "pointer-overflow") -UBSAN_CHECK(NullptrWithNonZeroOffset, "nullptr-with-nonzero-offset", - "pointer-overflow") -UBSAN_CHECK(NullptrAfterNonZeroOffset, "nullptr-after-nonzero-offset", - "pointer-overflow") UBSAN_CHECK(PointerOverflow, "pointer-overflow", "pointer-overflow") UBSAN_CHECK(MisalignedPointerUse, "misaligned-pointer-use", "alignment") UBSAN_CHECK(AlignmentAssumption, "alignment-assumption", "alignment") diff --git a/compiler-rt/lib/ubsan/ubsan_diag.cpp b/compiler-rt/lib/ubsan/ubsan_diag.cpp index 3673e66539d0..8c6651b272e2 100644 --- a/compiler-rt/lib/ubsan/ubsan_diag.cpp +++ b/compiler-rt/lib/ubsan/ubsan_diag.cpp @@ -406,7 +406,7 @@ static const char *kSuppressionTypes[] = { void __ubsan::InitializeSuppressions() { CHECK_EQ(nullptr, suppression_ctx); - suppression_ctx = new (suppression_placeholder) + suppression_ctx = new (suppression_placeholder) // NOLINT SuppressionContext(kSuppressionTypes, ARRAY_SIZE(kSuppressionTypes)); suppression_ctx->ParseFromFile(flags()->suppressions); } diff --git a/compiler-rt/lib/ubsan/ubsan_flags.cpp b/compiler-rt/lib/ubsan/ubsan_flags.cpp index 25cefd46ce27..d5463b1fc860 100644 --- a/compiler-rt/lib/ubsan/ubsan_flags.cpp +++ b/compiler-rt/lib/ubsan/ubsan_flags.cpp @@ -19,6 +19,11 @@ #include <stdlib.h> +#if SANITIZER_EMSCRIPTEN +extern "C" void emscripten_builtin_free(void *); +#include <emscripten/em_asm.h> +#endif + namespace __ubsan { static const char *GetFlag(const char *flag) { @@ -50,7 +55,12 @@ void InitializeFlags() { { CommonFlags cf; cf.CopyFrom(*common_flags()); + cf.print_summary = false; +#if !SANITIZER_EMSCRIPTEN + // getenv on emscripten uses malloc, which we can't when using some sanitizers. + // You can't run external symbolizers anyway. cf.external_symbolizer_path = GetFlag("UBSAN_SYMBOLIZER_PATH"); +#endif OverrideCommonFlags(cf); } @@ -64,7 +74,23 @@ void InitializeFlags() { // Override from user-specified string. parser.ParseString(__ubsan_default_options()); // Override from environment variable. +#if SANITIZER_EMSCRIPTEN +#ifdef __wasm64__ + // FIXME: support UBSAN in wasm64. + abort(); +#else + char *options = (char*) EM_ASM_INT({ + return withBuiltinMalloc(function () { + return allocateUTF8(Module['UBSAN_OPTIONS'] || 0); + }); + }); + parser.ParseString(options); + emscripten_builtin_free(options); +#endif +#else parser.ParseStringFromEnv("UBSAN_OPTIONS"); +#endif // SANITIZER_EMSCRIPTEN + InitializeCommonFlags(); if (Verbosity()) ReportUnrecognizedFlags(); diff --git a/compiler-rt/lib/ubsan/ubsan_handlers.cpp b/compiler-rt/lib/ubsan/ubsan_handlers.cpp index e201e6bba220..b070a378c0d4 100644 --- a/compiler-rt/lib/ubsan/ubsan_handlers.cpp +++ b/compiler-rt/lib/ubsan/ubsan_handlers.cpp @@ -766,33 +766,14 @@ static void handlePointerOverflowImpl(PointerOverflowData *Data, ValueHandle Result, ReportOptions Opts) { SourceLocation Loc = Data->Loc.acquire(); - ErrorType ET; - - if (Base == 0 && Result == 0) - ET = ErrorType::NullptrWithOffset; - else if (Base == 0 && Result != 0) - ET = ErrorType::NullptrWithNonZeroOffset; - else if (Base != 0 && Result == 0) - ET = ErrorType::NullptrAfterNonZeroOffset; - else - ET = ErrorType::PointerOverflow; + ErrorType ET = ErrorType::PointerOverflow; if (ignoreReport(Loc, Opts, ET)) return; ScopedReport R(Opts, Loc, ET); - if (ET == ErrorType::NullptrWithOffset) { - Diag(Loc, DL_Error, ET, "applying zero offset to null pointer"); - } else if (ET == ErrorType::NullptrWithNonZeroOffset) { - Diag(Loc, DL_Error, ET, "applying non-zero offset %0 to null pointer") - << Result; - } else if (ET == ErrorType::NullptrAfterNonZeroOffset) { - Diag( - Loc, DL_Error, ET, - "applying non-zero offset to non-null pointer %0 produced null pointer") - << (void *)Base; - } else if ((sptr(Base) >= 0) == (sptr(Result) >= 0)) { + if ((sptr(Base) >= 0) == (sptr(Result) >= 0)) { if (Base > Result) Diag(Loc, DL_Error, ET, "addition of unsigned offset to %0 overflowed to %1") diff --git a/compiler-rt/lib/ubsan/ubsan_platform.h b/compiler-rt/lib/ubsan/ubsan_platform.h index d2cc2e10bd2f..252536f26a80 100644 --- a/compiler-rt/lib/ubsan/ubsan_platform.h +++ b/compiler-rt/lib/ubsan/ubsan_platform.h @@ -16,7 +16,7 @@ #if defined(__linux__) || defined(__FreeBSD__) || defined(__APPLE__) || \ defined(__NetBSD__) || defined(__DragonFly__) || \ (defined(__sun__) && defined(__svr4__)) || defined(_WIN32) || \ - defined(__Fuchsia__) + defined(__Fuchsia__) || defined(__EMSCRIPTEN__) #define CAN_SANITIZE_UB 1 #else # define CAN_SANITIZE_UB 0 diff --git a/compiler-rt/lib/ubsan/ubsan_signals_standalone.cpp b/compiler-rt/lib/ubsan/ubsan_signals_standalone.cpp index 2c91db8ca397..8d980e1a2639 100644 --- a/compiler-rt/lib/ubsan/ubsan_signals_standalone.cpp +++ b/compiler-rt/lib/ubsan/ubsan_signals_standalone.cpp @@ -26,7 +26,7 @@ // debuggerd handler, but before the ART handler. // * Interceptors don't work at all when ubsan runtime is loaded late, ex. when // it is part of an APK that does not use wrap.sh method. -#if SANITIZER_FUCHSIA || SANITIZER_ANDROID +#if SANITIZER_FUCHSIA || SANITIZER_ANDROID || SANITIZER_EMSCRIPTEN namespace __ubsan { void InitializeDeadlySignals() {} @@ -45,9 +45,8 @@ namespace __ubsan { static void OnStackUnwind(const SignalContext &sig, const void *, BufferedStackTrace *stack) { - ubsan_GetStackTrace(stack, kStackTraceMax, - StackTrace::GetNextInstructionPc(sig.pc), sig.bp, - sig.context, common_flags()->fast_unwind_on_fatal); + ubsan_GetStackTrace(stack, kStackTraceMax, sig.pc, sig.bp, sig.context, + common_flags()->fast_unwind_on_fatal); } static void UBsanOnDeadlySignal(int signo, void *siginfo, void *context) { diff --git a/libcxx/include/__config b/libcxx/include/__config index 8c2f7614af53..e8ab6dff75d1 100644 --- a/libcxx/include/__config +++ b/libcxx/include/__config @@ -97,7 +97,8 @@ // Previously libc++ used "unsigned int" exclusively. # define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION // Unstable attempt to provide a more optimized std::function -# define _LIBCPP_ABI_OPTIMIZED_FUNCTION +// XXX EMSCRIPTEN https://github.com/emscripten-core/emscripten/issues/11022 +//# define _LIBCPP_ABI_OPTIMIZED_FUNCTION // All the regex constants must be distinct and nonzero. # define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO // Re-worked external template instantiations for std::string with a focus on diff --git a/libcxx/include/typeinfo b/libcxx/include/typeinfo index a0ac527db782..784cd0ed0101 100644 --- a/libcxx/include/typeinfo +++ b/libcxx/include/typeinfo @@ -331,6 +331,9 @@ public: return __impl::__hash(__type_name); } + // XXX Emscripten: adding `always_inline` fixes + // https://github.com/emscripten-core/emscripten/issues/13330 + __attribute__((always_inline)) _LIBCPP_INLINE_VISIBILITY bool operator==(const type_info& __arg) const _NOEXCEPT { diff --git a/libcxx/src/new.cpp b/libcxx/src/new.cpp index 48d6f997fdda..cfef148f056c 100644 --- a/libcxx/src/new.cpp +++ b/libcxx/src/new.cpp @@ -75,8 +75,17 @@ operator new(std::size_t size) _THROW_BAD_ALLOC #ifndef _LIBCPP_NO_EXCEPTIONS throw std::bad_alloc(); #else +#ifdef __EMSCRIPTEN__ + // Abort here so that when exceptions are disabled, we do not just + // return 0 when malloc returns 0. + // We could also do this with set_new_handler, but that adds a + // global constructor and a table entry, overhead that we can avoid + // by doing it this way. + abort(); +#else break; #endif +#endif } return p; } diff --git a/libcxx/src/support/runtime/exception_fallback.ipp b/libcxx/src/support/runtime/exception_fallback.ipp index ade933567f23..100ee6da5e10 100644 --- a/libcxx/src/support/runtime/exception_fallback.ipp +++ b/libcxx/src/support/runtime/exception_fallback.ipp @@ -47,6 +47,7 @@ get_terminate() noexcept return __libcpp_atomic_load(&__terminate_handler); } +#ifndef __EMSCRIPTEN__ // We provide this in JS _LIBCPP_NORETURN void terminate() noexcept @@ -69,7 +70,9 @@ terminate() noexcept } #endif // _LIBCPP_NO_EXCEPTIONS } +#endif // !__EMSCRIPTEN__ +#if !defined(__EMSCRIPTEN__) bool uncaught_exception() noexcept { return uncaught_exceptions() > 0; } int uncaught_exceptions() noexcept @@ -78,6 +81,7 @@ int uncaught_exceptions() noexcept fprintf(stderr, "uncaught_exceptions not yet implemented\n"); ::abort(); } +#endif // !__EMSCRIPTEN__ exception::~exception() noexcept diff --git a/libcxxabi/include/cxxabi.h b/libcxxabi/include/cxxabi.h index 85cb4b36b811..3f79df260a49 100644 --- a/libcxxabi/include/cxxabi.h +++ b/libcxxabi/include/cxxabi.h @@ -40,20 +40,24 @@ extern "C" { // 2.4.2 Allocating the Exception Object extern _LIBCXXABI_FUNC_VIS void * -__cxa_allocate_exception(size_t thrown_size) throw(); +__cxa_allocate_exception(size_t thrown_size) _NOEXCEPT; extern _LIBCXXABI_FUNC_VIS void -__cxa_free_exception(void *thrown_exception) throw(); +__cxa_free_exception(void *thrown_exception) _NOEXCEPT; // 2.4.3 Throwing the Exception Object extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void __cxa_throw(void *thrown_exception, std::type_info *tinfo, +#ifdef __USING_WASM_EXCEPTIONS__ + void *(_LIBCXXABI_DTOR_FUNC *dest)(void *)); +#else void (_LIBCXXABI_DTOR_FUNC *dest)(void *)); +#endif // 2.5.3 Exception Handlers extern _LIBCXXABI_FUNC_VIS void * -__cxa_get_exception_ptr(void *exceptionObject) throw(); +__cxa_get_exception_ptr(void *exceptionObject) _NOEXCEPT; extern _LIBCXXABI_FUNC_VIS void * -__cxa_begin_catch(void *exceptionObject) throw(); +__cxa_begin_catch(void *exceptionObject) _NOEXCEPT; extern _LIBCXXABI_FUNC_VIS void __cxa_end_catch(); #if defined(_LIBCXXABI_ARM_EHABI) extern _LIBCXXABI_FUNC_VIS bool @@ -148,17 +152,17 @@ extern _LIBCXXABI_FUNC_VIS char *__cxa_demangle(const char *mangled_name, // Apple additions to support C++ 0x exception_ptr class // These are primitives to wrap a smart pointer around an exception object -extern _LIBCXXABI_FUNC_VIS void *__cxa_current_primary_exception() throw(); +extern _LIBCXXABI_FUNC_VIS void *__cxa_current_primary_exception() _NOEXCEPT; extern _LIBCXXABI_FUNC_VIS void __cxa_rethrow_primary_exception(void *primary_exception); extern _LIBCXXABI_FUNC_VIS void -__cxa_increment_exception_refcount(void *primary_exception) throw(); +__cxa_increment_exception_refcount(void *primary_exception) _NOEXCEPT; extern _LIBCXXABI_FUNC_VIS void -__cxa_decrement_exception_refcount(void *primary_exception) throw(); +__cxa_decrement_exception_refcount(void *primary_exception) _NOEXCEPT; // Apple extension to support std::uncaught_exception() -extern _LIBCXXABI_FUNC_VIS bool __cxa_uncaught_exception() throw(); -extern _LIBCXXABI_FUNC_VIS unsigned int __cxa_uncaught_exceptions() throw(); +extern _LIBCXXABI_FUNC_VIS bool __cxa_uncaught_exception() _NOEXCEPT; +extern _LIBCXXABI_FUNC_VIS unsigned int __cxa_uncaught_exceptions() _NOEXCEPT; #if defined(__linux__) || defined(__Fuchsia__) // Linux and Fuchsia TLS support. Not yet an official part of the Itanium ABI. diff --git a/libcxxabi/src/abort_message.cpp b/libcxxabi/src/abort_message.cpp index 859a5031b93f..0cbce088228c 100644 --- a/libcxxabi/src/abort_message.cpp +++ b/libcxxabi/src/abort_message.cpp @@ -33,12 +33,21 @@ void abort_message(const char* format, ...) // formatting into the variable-sized buffer fails. #if !defined(NDEBUG) || !defined(LIBCXXABI_BAREMETAL) { +#if defined(__EMSCRIPTEN__) && defined(NDEBUG) + // Just trap in a non-debug build. These internal libcxxabi assertions are + // very rare, and it's not worth linking in vfprintf stdio support or + // even minimal logging for them, as we'll have a proper call stack, which + // will show a call into "abort_message", and can help debugging. (In a + // debug build that won't be inlined.) + abort(); +#else fprintf(stderr, "libc++abi: "); va_list list; va_start(list, format); vfprintf(stderr, format, list); va_end(list); fprintf(stderr, "\n"); +#endif } #endif diff --git a/libcxxabi/src/cxa_exception.cpp b/libcxxabi/src/cxa_exception.cpp index 9cb2bf888811..c4289cb86f85 100644 --- a/libcxxabi/src/cxa_exception.cpp +++ b/libcxxabi/src/cxa_exception.cpp @@ -180,7 +180,7 @@ extern "C" { // object. Zero-fill the object. If memory can't be allocated, call // std::terminate. Return a pointer to the memory to be used for the // user's exception object. -void *__cxa_allocate_exception(size_t thrown_size) throw() { +void *__cxa_allocate_exception(size_t thrown_size) _NOEXCEPT { size_t actual_size = cxa_exception_size_from_exception_thrown_size(thrown_size); // Allocate extra space before the __cxa_exception header to ensure the @@ -198,7 +198,7 @@ void *__cxa_allocate_exception(size_t thrown_size) throw() { // Free a __cxa_exception object allocated with __cxa_allocate_exception. -void __cxa_free_exception(void *thrown_object) throw() { +void __cxa_free_exception(void *thrown_object) _NOEXCEPT { // Compute the size of the padding before the header. size_t header_offset = get_cxa_exception_offset(); char *raw_buffer = @@ -254,7 +254,12 @@ will call terminate, assuming that there was no handler for the exception. */ void +#ifdef __USING_WASM_EXCEPTIONS__ +// In wasm, destructors return their argument +__cxa_throw(void *thrown_object, std::type_info *tinfo, void *(_LIBCXXABI_DTOR_FUNC *dest)(void *)) { +#else __cxa_throw(void *thrown_object, std::type_info *tinfo, void (_LIBCXXABI_DTOR_FUNC *dest)(void *)) { +#endif __cxa_eh_globals *globals = __cxa_get_globals(); __cxa_exception* exception_header = cxa_exception_from_thrown_object(thrown_object); @@ -292,7 +297,7 @@ The adjusted pointer is computed by the personality routine during phase 1 Requires: exception is native */ -void *__cxa_get_exception_ptr(void *unwind_exception) throw() { +void *__cxa_get_exception_ptr(void *unwind_exception) _NOEXCEPT { #if defined(_LIBCXXABI_ARM_EHABI) return reinterpret_cast<void*>( static_cast<_Unwind_Control_Block*>(unwind_exception)->barrier_cache.bitpattern[0]); @@ -307,7 +312,7 @@ void *__cxa_get_exception_ptr(void *unwind_exception) throw() { The routine to be called before the cleanup. This will save __cxa_exception in __cxa_eh_globals, so that __cxa_end_cleanup() can recover later. */ -bool __cxa_begin_cleanup(void *unwind_arg) throw() { +bool __cxa_begin_cleanup(void *unwind_arg) _NOEXCEPT { _Unwind_Exception* unwind_exception = static_cast<_Unwind_Exception*>(unwind_arg); __cxa_eh_globals* globals = __cxa_get_globals(); __cxa_exception* exception_header = @@ -431,7 +436,7 @@ to terminate or unexpected during unwinding. _Unwind_Exception and return a pointer to that. */ void* -__cxa_begin_catch(void* unwind_arg) throw() +__cxa_begin_catch(void* unwind_arg) _NOEXCEPT { _Unwind_Exception* unwind_exception = static_cast<_Unwind_Exception*>(unwind_arg); bool native_exception = __isOurExceptionClass(unwind_exception); @@ -647,7 +652,7 @@ void __cxa_rethrow() { Requires: If thrown_object is not NULL, it is a native exception. */ void -__cxa_increment_exception_refcount(void *thrown_object) throw() { +__cxa_increment_exception_refcount(void *thrown_object) _NOEXCEPT { if (thrown_object != NULL ) { __cxa_exception* exception_header = cxa_exception_from_thrown_object(thrown_object); @@ -664,7 +669,7 @@ __cxa_increment_exception_refcount(void *thrown_object) throw() { Requires: If thrown_object is not NULL, it is a native exception. */ _LIBCXXABI_NO_CFI -void __cxa_decrement_exception_refcount(void *thrown_object) throw() { +void __cxa_decrement_exception_refcount(void *thrown_object) _NOEXCEPT { if (thrown_object != NULL ) { __cxa_exception* exception_header = cxa_exception_from_thrown_object(thrown_object); @@ -687,7 +692,7 @@ void __cxa_decrement_exception_refcount(void *thrown_object) throw() { been no exceptions thrown, ever, on this thread, we can return NULL without the need to allocate the exception-handling globals. */ -void *__cxa_current_primary_exception() throw() { +void *__cxa_current_primary_exception() _NOEXCEPT { // get the current exception __cxa_eh_globals* globals = __cxa_get_globals_fast(); if (NULL == globals) @@ -759,10 +764,10 @@ __cxa_rethrow_primary_exception(void* thrown_object) } bool -__cxa_uncaught_exception() throw() { return __cxa_uncaught_exceptions() != 0; } +__cxa_uncaught_exception() _NOEXCEPT { return __cxa_uncaught_exceptions() != 0; } unsigned int -__cxa_uncaught_exceptions() throw() +__cxa_uncaught_exceptions() _NOEXCEPT { // This does not report foreign exceptions in flight __cxa_eh_globals* globals = __cxa_get_globals_fast(); diff --git a/libcxxabi/src/cxa_exception.h b/libcxxabi/src/cxa_exception.h index 49dde28b258f..dd20ba1e8891 100644 --- a/libcxxabi/src/cxa_exception.h +++ b/libcxxabi/src/cxa_exception.h @@ -19,6 +19,25 @@ namespace __cxxabiv1 { +#ifdef __USING_EMSCRIPTEN_EXCEPTIONS__ + +struct _LIBCXXABI_HIDDEN __cxa_exception { + size_t referenceCount; + std::type_info *exceptionType; + void (*exceptionDestructor)(void *); + uint8_t caught; + uint8_t rethrown; + void *adjustedPtr; + // Add padding to ensure that the size of __cxa_exception is a multiple of + // the maximum useful alignment for the target machine. This ensures that + // the thrown object that follows has that correct alignment. + void *padding; +}; + +static_assert(sizeof(__cxa_exception) % alignof(max_align_t) == 0, "__cxa_exception must have a size that is multipl of max alignment"); + +#else + static const uint64_t kOurExceptionClass = 0x434C4E47432B2B00; // CLNGC++\0 static const uint64_t kOurDependentExceptionClass = 0x434C4E47432B2B01; // CLNGC++\1 static const uint64_t get_vendor_and_language = 0xFFFFFFFFFFFFFF00; // mask for CLNGC++ @@ -43,7 +62,12 @@ struct _LIBCXXABI_HIDDEN __cxa_exception { // Manage the exception object itself. std::type_info *exceptionType; +#ifdef __USING_WASM_EXCEPTIONS__ + // In wasm, destructors return their argument + void *(_LIBCXXABI_DTOR_FUNC *exceptionDestructor)(void *); +#else void (_LIBCXXABI_DTOR_FUNC *exceptionDestructor)(void *); +#endif std::unexpected_handler unexpectedHandler; std::terminate_handler terminateHandler; @@ -159,6 +183,8 @@ extern "C" _LIBCXXABI_FUNC_VIS __cxa_eh_globals * __cxa_get_globals_fast (); extern "C" _LIBCXXABI_FUNC_VIS void * __cxa_allocate_dependent_exception (); extern "C" _LIBCXXABI_FUNC_VIS void __cxa_free_dependent_exception (void * dependent_exception); +#endif // !__USING_EMSCRIPTEN_EXCEPTIONS__ + } // namespace __cxxabiv1 #endif // _CXA_EXCEPTION_H diff --git a/libcxxabi/src/cxa_handlers.cpp b/libcxxabi/src/cxa_handlers.cpp index 344250dde0c7..07913fba397e 100644 --- a/libcxxabi/src/cxa_handlers.cpp +++ b/libcxxabi/src/cxa_handlers.cpp @@ -73,7 +73,7 @@ __attribute__((noreturn)) void terminate() noexcept { -#ifndef _LIBCXXABI_NO_EXCEPTIONS +#if !defined(_LIBCXXABI_NO_EXCEPTIONS) && !defined(__USING_EMSCRIPTEN_EXCEPTIONS__) // If there might be an uncaught exception using namespace __cxxabiv1; __cxa_eh_globals* globals = __cxa_get_globals_fast(); diff --git a/libcxxabi/src/cxa_personality.cpp b/libcxxabi/src/cxa_personality.cpp index b28c58df6a2f..4e3bd65d7e61 100644 --- a/libcxxabi/src/cxa_personality.cpp +++ b/libcxxabi/src/cxa_personality.cpp @@ -31,6 +31,8 @@ # define _LIBUNWIND_VERSION #endif +#define __USING_SJLJ_OR_WASM_EXCEPTIONS__ (__USING_SJLJ_EXCEPTIONS__ || __USING_WASM_EXCEPTIONS__) + #if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__) #include <windows.h> #include <winnt.h> @@ -70,7 +72,7 @@ extern "C" EXCEPTION_DISPOSITION _GCC_specific_handler(PEXCEPTION_RECORD, +------------------+--+-----+-----+------------------------+--------------------------+ | callSiteTableLength | (ULEB128) | Call Site Table length, used to find Action table | +---------------------+-----------+---------------------------------------------------+ -#ifndef __USING_SJLJ_EXCEPTIONS__ +#ifndef __USING_SJLJ_OR_WASM_EXCEPTIONS__ +---------------------+-----------+------------------------------------------------+ | Beginning of Call Site Table The current ip lies within the | | ... (start, length) range of one of these | @@ -84,7 +86,7 @@ extern "C" EXCEPTION_DISPOSITION _GCC_specific_handler(PEXCEPTION_RECORD, | +-------------+---------------------------------+------------------------------+ | | ... | +----------------------------------------------------------------------------------+ -#else // __USING_SJLJ_EXCEPTIONS__ +#else // !__USING_SJLJ_OR_WASM_EXCEPTIONS__ +---------------------+-----------+------------------------------------------------+ | Beginning of Call Site Table The current ip is a 1-based index into | | ... this table. Or it is -1 meaning no | @@ -97,7 +99,7 @@ extern "C" EXCEPTION_DISPOSITION _GCC_specific_handler(PEXCEPTION_RECORD, | +-------------+---------------------------------+------------------------------+ | | ... | +----------------------------------------------------------------------------------+ -#endif // __USING_SJLJ_EXCEPTIONS__ +#endif // __USING_SJLJ_OR_WASM_EXCEPTIONS__ +---------------------------------------------------------------------+ | Beginning of Action Table ttypeIndex == 0 : cleanup | | ... ttypeIndex > 0 : catch | @@ -547,7 +549,7 @@ void set_registers(_Unwind_Exception* unwind_exception, _Unwind_Context* context, const scan_results& results) { -#if defined(__USING_SJLJ_EXCEPTIONS__) +#ifdef __USING_SJLJ_OR_WASM_EXCEPTIONS__ #define __builtin_eh_return_data_regno(regno) regno #elif defined(__ibmxl__) // IBM xlclang++ compiler does not support __builtin_eh_return_data_regno. @@ -642,7 +644,7 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, // Get beginning current frame's code (as defined by the // emitted dwarf code) uintptr_t funcStart = _Unwind_GetRegionStart(context); -#ifdef __USING_SJLJ_EXCEPTIONS__ +#ifdef __USING_SJLJ_OR_WASM_EXCEPTIONS__ if (ip == uintptr_t(-1)) { // no action @@ -652,9 +654,9 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, else if (ip == 0) call_terminate(native_exception, unwind_exception); // ip is 1-based index into call site table -#else // !__USING_SJLJ_EXCEPTIONS__ +#else // !__USING_SJLJ_OR_WASM_EXCEPTIONS__ uintptr_t ipOffset = ip - funcStart; -#endif // !defined(_USING_SLJL_EXCEPTIONS__) +#endif // !defined(__USING_SJLJ_OR_WASM_EXCEPTIONS__) const uint8_t* classInfo = NULL; // Note: See JITDwarfEmitter::EmitExceptionTable(...) for corresponding // dwarf emission @@ -676,8 +678,8 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, // Walk call-site table looking for range that // includes current PC. uint8_t callSiteEncoding = *lsda++; -#ifdef __USING_SJLJ_EXCEPTIONS__ - (void)callSiteEncoding; // When using SjLj exceptions, callSiteEncoding is never used +#ifdef __USING_SJLJ_OR_WASM_EXCEPTIONS__ + (void)callSiteEncoding; // When using SjLj/Wasm exceptions, callSiteEncoding is never used #endif uint32_t callSiteTableLength = static_cast<uint32_t>(readULEB128(&lsda)); const uint8_t* callSiteTableStart = lsda; @@ -687,7 +689,7 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, while (callSitePtr < callSiteTableEnd) { // There is one entry per call site. -#ifndef __USING_SJLJ_EXCEPTIONS__ +#ifndef __USING_SJLJ_OR_WASM_EXCEPTIONS__ // The call sites are non-overlapping in [start, start+length) // The call sites are ordered in increasing value of start uintptr_t start = readEncodedPointer(&callSitePtr, callSiteEncoding); @@ -695,15 +697,15 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, uintptr_t landingPad = readEncodedPointer(&callSitePtr, callSiteEncoding); uintptr_t actionEntry = readULEB128(&callSitePtr); if ((start <= ipOffset) && (ipOffset < (start + length))) -#else // __USING_SJLJ_EXCEPTIONS__ +#else // __USING_SJLJ_OR_WASM_EXCEPTIONS__ // ip is 1-based index into this table uintptr_t landingPad = readULEB128(&callSitePtr); uintptr_t actionEntry = readULEB128(&callSitePtr); if (--ip == 0) -#endif // __USING_SJLJ_EXCEPTIONS__ +#endif // __USING_SJLJ_OR_WASM_EXCEPTIONS__ { // Found the call site containing ip. -#ifndef __USING_SJLJ_EXCEPTIONS__ +#ifndef __USING_SJLJ_OR_WASM_EXCEPTIONS__ if (landingPad == 0) { // No handler here @@ -711,9 +713,9 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, return; } landingPad = (uintptr_t)lpStart + landingPad; -#else // __USING_SJLJ_EXCEPTIONS__ +#else // __USING_SJLJ_OR_WASM_EXCEPTIONS__ ++landingPad; -#endif // __USING_SJLJ_EXCEPTIONS__ +#endif // __USING_SJLJ_OR_WASM_EXCEPTIONS__ results.landingPad = landingPad; if (actionEntry == 0) { @@ -805,8 +807,6 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, { // Native exception caught by exception // specification. - assert(actions & _UA_SEARCH_PHASE); - results.ttypeIndex = ttypeIndex; results.actionRecord = actionRecord; results.adjustedPtr = adjustedPtr; results.reason = _URC_HANDLER_FOUND; @@ -841,7 +841,7 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, action += actionOffset; } // there is no break out of this loop, only return } -#ifndef __USING_SJLJ_EXCEPTIONS__ +#ifndef __USING_SJLJ_OR_WASM_EXCEPTIONS__ else if (ipOffset < start) { // There is no call site for this ip @@ -849,7 +849,7 @@ static void scan_eh_tab(scan_results &results, _Unwind_Action actions, // Possible stack corruption. call_terminate(native_exception, unwind_exception); } -#endif // !__USING_SJLJ_EXCEPTIONS__ +#endif // !__USING_SJLJ_OR_WASM_EXCEPTIONS__ } // there might be some tricky cases which break out of this loop // It is possible that no eh table entry specify how to handle @@ -906,7 +906,9 @@ _UA_CLEANUP_PHASE */ #if !defined(_LIBCXXABI_ARM_EHABI) -#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__) +#ifdef __USING_WASM_EXCEPTIONS__ +_Unwind_Reason_Code __gxx_personality_wasm0 +#elif defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__) static _Unwind_Reason_Code __gxx_personality_imp #else _LIBCXXABI_FUNC_VIS _Unwind_Reason_Code @@ -990,6 +992,16 @@ __gxx_personality_v0 exception_header->catchTemp = 0; #endif } +#ifdef __USING_WASM_EXCEPTIONS__ + // Wasm uses only one phase in _UA_CLEANUP_PHASE, so we should set + // these here. + __cxa_exception* exception_header = (__cxa_exception*)(unwind_exception+1) - 1; + exception_header->handlerSwitchValue = static_cast<int>(results.ttypeIndex); + exception_header->actionRecord = results.actionRecord; + exception_header->languageSpecificData = results.languageSpecificData; + exception_header->catchTemp = reinterpret_cast<void*>(results.landingPad); + exception_header->adjustedPtr = results.adjustedPtr; +#endif return _URC_INSTALL_CONTEXT; } diff --git a/libcxxabi/src/cxa_thread_atexit.cpp b/libcxxabi/src/cxa_thread_atexit.cpp index 665f9e55694a..dcf283ceb1df 100644 --- a/libcxxabi/src/cxa_thread_atexit.cpp +++ b/libcxxabi/src/cxa_thread_atexit.cpp @@ -112,9 +112,14 @@ extern "C" { #ifdef HAVE___CXA_THREAD_ATEXIT_IMPL return __cxa_thread_atexit_impl(dtor, obj, dso_symbol); #else +#ifndef __EMSCRIPTEN__ + // Emscripten doesn't fully support weak undefined symbols yet + // https://github.com/emscripten-core/emscripten/issues/12819 if (__cxa_thread_atexit_impl) { return __cxa_thread_atexit_impl(dtor, obj, dso_symbol); - } else { + } else +#endif + { // Initialize the dtors std::__libcpp_tls_key (uses __cxa_guard_*() for // one-time initialization and __cxa_atexit() for destruction) static DtorsManager manager; diff --git a/libcxxabi/src/private_typeinfo.cpp b/libcxxabi/src/private_typeinfo.cpp index e1086661c019..8ee2e7607c7d 100644 --- a/libcxxabi/src/private_typeinfo.cpp +++ b/libcxxabi/src/private_typeinfo.cpp @@ -1323,4 +1323,35 @@ __base_class_type_info::search_below_dst(__dynamic_cast_info* info, use_strcmp); } +// XXX EMSCRIPTEN + +#ifndef __USING_WASM_EXCEPTIONS__ + +// These functions are used by the emscripten-style exception handling +// mechanism. +// Note that they need to be included even in the `-noexcept` build of +// libc++abi to support the case where some parts of a project are built +// with exception catching enabled, but at link time exception catching +// is disabled. In this case dependencies to these functions (and the JS +// functions which call them) will still exist in the final build. +extern "C" { + +int __cxa_can_catch(__shim_type_info* catchType, __shim_type_info* excpType, void **thrown) { + //std::type_info *t1 = static_cast<std::type_info*>(catchType); + //std::type_info *t2 = static_cast<std::type_info*>(excpType); + //printf("can %s catch %s (%p)?\n", t1->name(), t2->name(), thrown); + + void *temp = *thrown; + int ret = catchType->can_catch(excpType, temp); + if (ret) *thrown = temp; // apply changes only if we are catching + return ret; +} + +int __cxa_is_pointer_type(__shim_type_info* type) { + return !!dynamic_cast<__pointer_type_info*>(type); +} + +} +#endif // __USING_EMSCRIPTEN_EXCEPTIONS__ + } // __cxxabiv1 diff --git a/libcxxabi/src/stdlib_new_delete.cpp b/libcxxabi/src/stdlib_new_delete.cpp index 4a664e15a50f..8035213da7e5 100644 --- a/libcxxabi/src/stdlib_new_delete.cpp +++ b/libcxxabi/src/stdlib_new_delete.cpp @@ -38,8 +38,17 @@ operator new(std::size_t size) _THROW_BAD_ALLOC #ifndef _LIBCXXABI_NO_EXCEPTIONS throw std::bad_alloc(); #else +#ifdef __EMSCRIPTEN__ + // Abort here so that when exceptions are disabled, we do not just + // return 0 when malloc returns 0. + // We could also do this with set_new_handler, but that adds a + // global constructor and a table entry, overhead that we can avoid + // by doing it this way. + abort(); +#else break; #endif +#endif } return p; } |