diff options
Diffstat (limited to 'libsanitizer/sanitizer_common/sanitizer_win.cc')
| -rw-r--r-- | libsanitizer/sanitizer_common/sanitizer_win.cc | 272 |
1 files changed, 219 insertions, 53 deletions
diff --git a/libsanitizer/sanitizer_common/sanitizer_win.cc b/libsanitizer/sanitizer_common/sanitizer_win.cc index 0c0a29cea44..785883ce767 100644 --- a/libsanitizer/sanitizer_common/sanitizer_win.cc +++ b/libsanitizer/sanitizer_common/sanitizer_win.cc @@ -25,7 +25,9 @@ #include "sanitizer_libc.h" #include "sanitizer_mutex.h" #include "sanitizer_placement_new.h" +#include "sanitizer_procmaps.h" #include "sanitizer_stacktrace.h" +#include "sanitizer_symbolizer.h" namespace __sanitizer { @@ -33,13 +35,15 @@ namespace __sanitizer { // --------------------- sanitizer_common.h uptr GetPageSize() { - // FIXME: there is an API for getting the system page size (GetSystemInfo or - // GetNativeSystemInfo), but if we use it here we get test failures elsewhere. - return 1U << 14; + SYSTEM_INFO si; + GetSystemInfo(&si); + return si.dwPageSize; } uptr GetMmapGranularity() { - return 1U << 16; // FIXME: is this configurable? + SYSTEM_INFO si; + GetSystemInfo(&si); + return si.dwAllocationGranularity; } uptr GetMaxVirtualAddress() { @@ -81,10 +85,11 @@ void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top, } #endif // #if !SANITIZER_GO -void *MmapOrDie(uptr size, const char *mem_type) { +void *MmapOrDie(uptr size, const char *mem_type, bool raw_report) { void *rv = VirtualAlloc(0, size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); if (rv == 0) - ReportMmapFailureAndDie(size, mem_type, "allocate", GetLastError()); + ReportMmapFailureAndDie(size, mem_type, "allocate", + GetLastError(), raw_report); return rv; } @@ -92,20 +97,90 @@ void UnmapOrDie(void *addr, uptr size) { if (!size || !addr) return; - if (VirtualFree(addr, size, MEM_DECOMMIT) == 0) { - Report("ERROR: %s failed to " - "deallocate 0x%zx (%zd) bytes at address %p (error code: %d)\n", - SanitizerToolName, size, size, addr, GetLastError()); - CHECK("unable to unmap" && 0); + MEMORY_BASIC_INFORMATION mbi; + CHECK(VirtualQuery(addr, &mbi, sizeof(mbi))); + + // MEM_RELEASE can only be used to unmap whole regions previously mapped with + // VirtualAlloc. So we first try MEM_RELEASE since it is better, and if that + // fails try MEM_DECOMMIT. + if (VirtualFree(addr, 0, MEM_RELEASE) == 0) { + if (VirtualFree(addr, size, MEM_DECOMMIT) == 0) { + Report("ERROR: %s failed to " + "deallocate 0x%zx (%zd) bytes at address %p (error code: %d)\n", + SanitizerToolName, size, size, addr, GetLastError()); + CHECK("unable to unmap" && 0); + } } } +// We want to map a chunk of address space aligned to 'alignment'. +void *MmapAlignedOrDie(uptr size, uptr alignment, const char *mem_type) { + CHECK(IsPowerOfTwo(size)); + CHECK(IsPowerOfTwo(alignment)); + + // Windows will align our allocations to at least 64K. + alignment = Max(alignment, GetMmapGranularity()); + + uptr mapped_addr = + (uptr)VirtualAlloc(0, size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + if (!mapped_addr) + ReportMmapFailureAndDie(size, mem_type, "allocate aligned", GetLastError()); + + // If we got it right on the first try, return. Otherwise, unmap it and go to + // the slow path. + if (IsAligned(mapped_addr, alignment)) + return (void*)mapped_addr; + if (VirtualFree((void *)mapped_addr, 0, MEM_RELEASE) == 0) + ReportMmapFailureAndDie(size, mem_type, "deallocate", GetLastError()); + + // If we didn't get an aligned address, overallocate, find an aligned address, + // unmap, and try to allocate at that aligned address. + int retries = 0; + const int kMaxRetries = 10; + for (; retries < kMaxRetries && + (mapped_addr == 0 || !IsAligned(mapped_addr, alignment)); + retries++) { + // Overallocate size + alignment bytes. + mapped_addr = + (uptr)VirtualAlloc(0, size + alignment, MEM_RESERVE, PAGE_NOACCESS); + if (!mapped_addr) + ReportMmapFailureAndDie(size, mem_type, "allocate aligned", + GetLastError()); + + // Find the aligned address. + uptr aligned_addr = RoundUpTo(mapped_addr, alignment); + + // Free the overallocation. + if (VirtualFree((void *)mapped_addr, 0, MEM_RELEASE) == 0) + ReportMmapFailureAndDie(size, mem_type, "deallocate", GetLastError()); + + // Attempt to allocate exactly the number of bytes we need at the aligned + // address. This may fail for a number of reasons, in which case we continue + // the loop. + mapped_addr = (uptr)VirtualAlloc((void *)aligned_addr, size, + MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + } + + // Fail if we can't make this work quickly. + if (retries == kMaxRetries && mapped_addr == 0) + ReportMmapFailureAndDie(size, mem_type, "allocate aligned", GetLastError()); + + return (void *)mapped_addr; +} + void *MmapFixedNoReserve(uptr fixed_addr, uptr size, const char *name) { // FIXME: is this really "NoReserve"? On Win32 this does not matter much, // but on Win64 it does. - (void)name; // unsupported - void *p = VirtualAlloc((LPVOID)fixed_addr, size, - MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + (void)name; // unsupported +#if !SANITIZER_GO && SANITIZER_WINDOWS64 + // On asan/Windows64, use MEM_COMMIT would result in error + // 1455:ERROR_COMMITMENT_LIMIT. + // Asan uses exception handler to commit page on demand. + void *p = VirtualAlloc((LPVOID)fixed_addr, size, MEM_RESERVE, PAGE_READWRITE); +#else + void *p = VirtualAlloc((LPVOID)fixed_addr, size, MEM_RESERVE | MEM_COMMIT, + PAGE_READWRITE); +#endif if (p == 0) Report("ERROR: %s failed to " "allocate %p (%zd) bytes at %p (error code: %d)\n", @@ -113,8 +188,18 @@ void *MmapFixedNoReserve(uptr fixed_addr, uptr size, const char *name) { return p; } +// Memory space mapped by 'MmapFixedOrDie' must have been reserved by +// 'MmapFixedNoAccess'. void *MmapFixedOrDie(uptr fixed_addr, uptr size) { - return MmapFixedNoReserve(fixed_addr, size); + void *p = VirtualAlloc((LPVOID)fixed_addr, size, + MEM_COMMIT, PAGE_READWRITE); + if (p == 0) { + char mem_type[30]; + internal_snprintf(mem_type, sizeof(mem_type), "memory at address 0x%zx", + fixed_addr); + ReportMmapFailureAndDie(size, mem_type, "allocate", GetLastError()); + } + return p; } void *MmapNoReserveOrDie(uptr size, const char *mem_type) { @@ -122,10 +207,10 @@ void *MmapNoReserveOrDie(uptr size, const char *mem_type) { return MmapOrDie(size, mem_type); } -void *MmapNoAccess(uptr fixed_addr, uptr size, const char *name) { +void *MmapFixedNoAccess(uptr fixed_addr, uptr size, const char *name) { (void)name; // unsupported void *res = VirtualAlloc((LPVOID)fixed_addr, size, - MEM_RESERVE | MEM_COMMIT, PAGE_NOACCESS); + MEM_RESERVE, PAGE_NOACCESS); if (res == 0) Report("WARNING: %s failed to " "mprotect %p (%zd) bytes at %p (error code: %d)\n", @@ -133,19 +218,28 @@ void *MmapNoAccess(uptr fixed_addr, uptr size, const char *name) { return res; } +void *MmapNoAccess(uptr size) { + void *res = VirtualAlloc(nullptr, size, MEM_RESERVE, PAGE_NOACCESS); + if (res == 0) + Report("WARNING: %s failed to " + "mprotect %p (%zd) bytes (error code: %d)\n", + SanitizerToolName, size, size, GetLastError()); + return res; +} + bool MprotectNoAccess(uptr addr, uptr size) { DWORD old_protection; return VirtualProtect((LPVOID)addr, size, PAGE_NOACCESS, &old_protection); } -void FlushUnneededShadowMemory(uptr addr, uptr size) { +void ReleaseMemoryToOS(uptr addr, uptr size) { // This is almost useless on 32-bits. // FIXME: add madvise-analog when we move to 64-bits. } void NoHugePagesInRegion(uptr addr, uptr size) { - // FIXME: probably similar to FlushUnneededShadowMemory. + // FIXME: probably similar to ReleaseMemoryToOS. } void DontDumpShadowMemory(uptr addr, uptr length) { @@ -153,6 +247,26 @@ void DontDumpShadowMemory(uptr addr, uptr length) { // FIXME: add madvise-analog when we move to 64-bits. } +uptr FindAvailableMemoryRange(uptr size, uptr alignment, uptr left_padding) { + uptr address = 0; + while (true) { + MEMORY_BASIC_INFORMATION info; + if (!::VirtualQuery((void*)address, &info, sizeof(info))) + return 0; + + if (info.State == MEM_FREE) { + uptr shadow_address = RoundUpTo((uptr)info.BaseAddress + left_padding, + alignment); + if (shadow_address + size < (uptr)info.BaseAddress + info.RegionSize) + return shadow_address; + } + + // Move to the next region. + address = (uptr)info.BaseAddress + info.RegionSize; + } + return 0; +} + bool MemoryRangeIsAvailable(uptr range_start, uptr range_end) { MEMORY_BASIC_INFORMATION mbi; CHECK(VirtualQuery((void *)range_start, &mbi, sizeof(mbi))); @@ -218,7 +332,7 @@ struct ModuleInfo { uptr end_address; }; -#ifndef SANITIZER_GO +#if !SANITIZER_GO int CompareModulesBase(const void *pl, const void *pr) { const ModuleInfo *l = (ModuleInfo *)pl, *r = (ModuleInfo *)pr; if (l->base_address < r->base_address) @@ -228,18 +342,18 @@ int CompareModulesBase(const void *pl, const void *pr) { #endif } // namespace -#ifndef SANITIZER_GO +#if !SANITIZER_GO void DumpProcessMap() { Report("Dumping process modules:\n"); - InternalScopedBuffer<LoadedModule> modules(kMaxNumberOfModules); - uptr num_modules = - GetListOfModules(modules.data(), kMaxNumberOfModules, nullptr); + ListOfModules modules; + modules.init(); + uptr num_modules = modules.size(); InternalScopedBuffer<ModuleInfo> module_infos(num_modules); for (size_t i = 0; i < num_modules; ++i) { module_infos[i].filepath = modules[i].full_name(); - module_infos[i].base_address = modules[i].base_address(); - module_infos[i].end_address = modules[i].ranges().next()->end; + module_infos[i].base_address = modules[i].ranges().front()->beg; + module_infos[i].end_address = modules[i].ranges().back()->end; } qsort(module_infos.data(), num_modules, sizeof(ModuleInfo), CompareModulesBase); @@ -314,6 +428,7 @@ void Abort() { internal__exit(3); } +#if !SANITIZER_GO // Read the file to extract the ImageBase field from the PE header. If ASLR is // disabled and this virtual address is available, the loader will typically // load the image at this address. Therefore, we call it the preferred base. Any @@ -366,9 +481,8 @@ static uptr GetPreferredBase(const char *modname) { return (uptr)pe_header->ImageBase; } -#ifndef SANITIZER_GO -uptr GetListOfModules(LoadedModule *modules, uptr max_modules, - string_predicate_t filter) { +void ListOfModules::init() { + clear(); HANDLE cur_process = GetCurrentProcess(); // Query the list of modules. Start by assuming there are no more than 256 @@ -390,10 +504,8 @@ uptr GetListOfModules(LoadedModule *modules, uptr max_modules, } // |num_modules| is the number of modules actually present, - // |count| is the number of modules we return. - size_t nun_modules = bytes_required / sizeof(HMODULE), - count = 0; - for (size_t i = 0; i < nun_modules && count < max_modules; ++i) { + size_t num_modules = bytes_required / sizeof(HMODULE); + for (size_t i = 0; i < num_modules; ++i) { HMODULE handle = hmodules[i]; MODULEINFO mi; if (!GetModuleInformation(cur_process, handle, &mi, sizeof(mi))) @@ -411,9 +523,6 @@ uptr GetListOfModules(LoadedModule *modules, uptr max_modules, &module_name[0], kMaxPathLength, NULL, NULL); module_name[module_name_len] = '\0'; - if (filter && !filter(module_name)) - continue; - uptr base_address = (uptr)mi.lpBaseOfDll; uptr end_address = (uptr)mi.lpBaseOfDll + mi.SizeOfImage; @@ -424,15 +533,13 @@ uptr GetListOfModules(LoadedModule *modules, uptr max_modules, uptr preferred_base = GetPreferredBase(&module_name[0]); uptr adjusted_base = base_address - preferred_base; - LoadedModule *cur_module = &modules[count]; - cur_module->set(module_name, adjusted_base); + LoadedModule cur_module; + cur_module.set(module_name, adjusted_base); // We add the whole module as one single address range. - cur_module->addAddressRange(base_address, end_address, /*executable*/ true); - count++; + cur_module.addAddressRange(base_address, end_address, /*executable*/ true); + modules_.push_back(cur_module); } UnmapOrDie(hmodules, modules_buffer_size); - - return count; }; // We can't use atexit() directly at __asan_init time as the CRT is not fully @@ -459,14 +566,15 @@ __declspec(allocate(".CRT$XID")) int (*__run_atexit)() = RunAtexit; // ------------------ sanitizer_libc.h fd_t OpenFile(const char *filename, FileAccessMode mode, error_t *last_error) { + // FIXME: Use the wide variants to handle Unicode filenames. fd_t res; if (mode == RdOnly) { - res = CreateFile(filename, GENERIC_READ, - FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, - nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr); + res = CreateFileA(filename, GENERIC_READ, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr); } else if (mode == WrOnly) { - res = CreateFile(filename, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, - FILE_ATTRIBUTE_NORMAL, nullptr); + res = CreateFileA(filename, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, + FILE_ATTRIBUTE_NORMAL, nullptr); } else { UNIMPLEMENTED(); } @@ -613,7 +721,7 @@ void InitTlsSize() { void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size, uptr *tls_addr, uptr *tls_size) { -#ifdef SANITIZER_GO +#if SANITIZER_GO *stk_addr = 0; *stk_size = 0; *tls_addr = 0; @@ -634,7 +742,7 @@ void BufferedStackTrace::SlowUnwindStack(uptr pc, u32 max_depth) { // FIXME: CaptureStackBackTrace might be too slow for us. // FIXME: Compare with StackWalk64. // FIXME: Look at LLVMUnhandledExceptionFilter in Signals.inc - size = CaptureStackBackTrace(2, Min(max_depth, kStackTraceMax), + size = CaptureStackBackTrace(1, Min(max_depth, kStackTraceMax), (void**)trace, 0); if (size == 0) return; @@ -649,6 +757,9 @@ void BufferedStackTrace::SlowUnwindStackWithContext(uptr pc, void *context, CONTEXT ctx = *(CONTEXT *)context; STACKFRAME64 stack_frame; memset(&stack_frame, 0, sizeof(stack_frame)); + + InitializeDbgHelpIfNeeded(); + size = 0; #if defined(_WIN64) int machine_type = IMAGE_FILE_MACHINE_AMD64; @@ -697,7 +808,7 @@ void InstallDeadlySignalHandlers(SignalHandlerType handler) { // FIXME: Decide what to do on Windows. } -bool IsDeadlySignal(int signum) { +bool IsHandledDeadlySignal(int signum) { // FIXME: Decide what to do on Windows. return false; } @@ -728,8 +839,8 @@ bool IsAccessibleMemoryRange(uptr beg, uptr size) { } SignalContext SignalContext::Create(void *siginfo, void *context) { - EXCEPTION_RECORD *exception_record = (EXCEPTION_RECORD*)siginfo; - CONTEXT *context_record = (CONTEXT*)context; + EXCEPTION_RECORD *exception_record = (EXCEPTION_RECORD *)siginfo; + CONTEXT *context_record = (CONTEXT *)context; uptr pc = (uptr)exception_record->ExceptionAddress; #ifdef _WIN64 @@ -741,7 +852,19 @@ SignalContext SignalContext::Create(void *siginfo, void *context) { #endif uptr access_addr = exception_record->ExceptionInformation[1]; - return SignalContext(context, access_addr, pc, sp, bp); + // The contents of this array are documented at + // https://msdn.microsoft.com/en-us/library/windows/desktop/aa363082(v=vs.85).aspx + // The first element indicates read as 0, write as 1, or execute as 8. The + // second element is the faulting address. + WriteFlag write_flag = SignalContext::UNKNOWN; + switch (exception_record->ExceptionInformation[0]) { + case 0: write_flag = SignalContext::READ; break; + case 1: write_flag = SignalContext::WRITE; break; + case 8: write_flag = SignalContext::UNKNOWN; break; + } + bool is_memory_access = write_flag != SignalContext::UNKNOWN; + return SignalContext(context, access_addr, pc, sp, bp, is_memory_access, + write_flag); } uptr ReadBinaryName(/*out*/char *buf, uptr buf_len) { @@ -759,6 +882,49 @@ void CheckVMASize() { // Do nothing. } +void MaybeReexec() { + // No need to re-exec on Windows. +} + +char **GetArgv() { + // FIXME: Actually implement this function. + return 0; +} + +pid_t StartSubprocess(const char *program, const char *const argv[], + fd_t stdin_fd, fd_t stdout_fd, fd_t stderr_fd) { + // FIXME: implement on this platform + // Should be implemented based on + // SymbolizerProcess::StarAtSymbolizerSubprocess + // from lib/sanitizer_common/sanitizer_symbolizer_win.cc. + return -1; +} + +bool IsProcessRunning(pid_t pid) { + // FIXME: implement on this platform. + return false; +} + +int WaitForProcess(pid_t pid) { return -1; } + +// FIXME implement on this platform. +void GetMemoryProfile(fill_profile_f cb, uptr *stats, uptr stats_size) { } + + } // namespace __sanitizer +#if !SANITIZER_GO +// Workaround to implement weak hooks on Windows. COFF doesn't directly support +// weak symbols, but it does support /alternatename, which is similar. If the +// user does not override the hook, we will use this default definition instead +// of null. +extern "C" void __sanitizer_print_memory_profile(int top_percent) {} + +#ifdef _WIN64 +#pragma comment(linker, "/alternatename:__sanitizer_print_memory_profile=__sanitizer_default_print_memory_profile") // NOLINT +#else +#pragma comment(linker, "/alternatename:___sanitizer_print_memory_profile=___sanitizer_default_print_memory_profile") // NOLINT +#endif +#endif + #endif // _WIN32 |