forked from OSchip/llvm-project
608 lines
16 KiB
C++
608 lines
16 KiB
C++
//===-- sanitizer_win.cc --------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between AddressSanitizer and ThreadSanitizer
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// run-time libraries and implements windows-specific functions from
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// sanitizer_libc.h.
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//===----------------------------------------------------------------------===//
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#include "sanitizer_platform.h"
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#if SANITIZER_WINDOWS
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#define WIN32_LEAN_AND_MEAN
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#define NOGDI
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#include <windows.h>
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#include <dbghelp.h>
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#include <io.h>
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#include <psapi.h>
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#include <stdlib.h>
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#include "sanitizer_common.h"
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#include "sanitizer_libc.h"
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#include "sanitizer_mutex.h"
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#include "sanitizer_placement_new.h"
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#include "sanitizer_stacktrace.h"
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namespace __sanitizer {
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#include "sanitizer_syscall_generic.inc"
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// --------------------- sanitizer_common.h
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uptr GetPageSize() {
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return 1U << 14; // FIXME: is this configurable?
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}
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uptr GetMmapGranularity() {
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return 1U << 16; // FIXME: is this configurable?
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}
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uptr GetMaxVirtualAddress() {
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SYSTEM_INFO si;
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GetSystemInfo(&si);
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return (uptr)si.lpMaximumApplicationAddress;
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}
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bool FileExists(const char *filename) {
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UNIMPLEMENTED();
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}
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uptr internal_getpid() {
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return GetProcessId(GetCurrentProcess());
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}
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// In contrast to POSIX, on Windows GetCurrentThreadId()
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// returns a system-unique identifier.
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uptr GetTid() {
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return GetCurrentThreadId();
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}
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uptr GetThreadSelf() {
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return GetTid();
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}
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#if !SANITIZER_GO
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void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top,
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uptr *stack_bottom) {
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CHECK(stack_top);
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CHECK(stack_bottom);
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MEMORY_BASIC_INFORMATION mbi;
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CHECK_NE(VirtualQuery(&mbi /* on stack */, &mbi, sizeof(mbi)), 0);
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// FIXME: is it possible for the stack to not be a single allocation?
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// Are these values what ASan expects to get (reserved, not committed;
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// including stack guard page) ?
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*stack_top = (uptr)mbi.BaseAddress + mbi.RegionSize;
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*stack_bottom = (uptr)mbi.AllocationBase;
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}
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#endif // #if !SANITIZER_GO
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void *MmapOrDie(uptr size, const char *mem_type) {
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void *rv = VirtualAlloc(0, size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
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if (rv == 0) {
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Report("ERROR: %s failed to "
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"allocate 0x%zx (%zd) bytes of %s (error code: %d)\n",
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SanitizerToolName, size, size, mem_type, GetLastError());
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CHECK("unable to mmap" && 0);
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}
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return rv;
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}
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void UnmapOrDie(void *addr, uptr size) {
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if (VirtualFree(addr, size, MEM_DECOMMIT) == 0) {
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Report("ERROR: %s failed to "
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"deallocate 0x%zx (%zd) bytes at address %p (error code: %d)\n",
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SanitizerToolName, size, size, addr, GetLastError());
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CHECK("unable to unmap" && 0);
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}
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}
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void *MmapFixedNoReserve(uptr fixed_addr, uptr size) {
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// FIXME: is this really "NoReserve"? On Win32 this does not matter much,
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// but on Win64 it does.
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void *p = VirtualAlloc((LPVOID)fixed_addr, size,
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MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
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if (p == 0)
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Report("ERROR: %s failed to "
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"allocate %p (%zd) bytes at %p (error code: %d)\n",
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SanitizerToolName, size, size, fixed_addr, GetLastError());
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return p;
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}
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void *MmapFixedOrDie(uptr fixed_addr, uptr size) {
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return MmapFixedNoReserve(fixed_addr, size);
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}
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void *MmapNoReserveOrDie(uptr size, const char *mem_type) {
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// FIXME: make this really NoReserve?
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return MmapOrDie(size, mem_type);
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}
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void *Mprotect(uptr fixed_addr, uptr size) {
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return VirtualAlloc((LPVOID)fixed_addr, size,
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MEM_RESERVE | MEM_COMMIT, PAGE_NOACCESS);
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}
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void FlushUnneededShadowMemory(uptr addr, uptr size) {
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// This is almost useless on 32-bits.
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// FIXME: add madvice-analog when we move to 64-bits.
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}
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bool MemoryRangeIsAvailable(uptr range_start, uptr range_end) {
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MEMORY_BASIC_INFORMATION mbi;
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CHECK(VirtualQuery((void *)range_start, &mbi, sizeof(mbi)));
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return mbi.Protect & PAGE_NOACCESS &&
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(uptr)mbi.BaseAddress + mbi.RegionSize >= range_end;
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}
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void *MapFileToMemory(const char *file_name, uptr *buff_size) {
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UNIMPLEMENTED();
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}
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void *MapWritableFileToMemory(void *addr, uptr size, uptr fd, uptr offset) {
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UNIMPLEMENTED();
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}
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static const int kMaxEnvNameLength = 128;
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static const DWORD kMaxEnvValueLength = 32767;
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namespace {
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struct EnvVariable {
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char name[kMaxEnvNameLength];
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char value[kMaxEnvValueLength];
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};
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} // namespace
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static const int kEnvVariables = 5;
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static EnvVariable env_vars[kEnvVariables];
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static int num_env_vars;
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const char *GetEnv(const char *name) {
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// Note: this implementation caches the values of the environment variables
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// and limits their quantity.
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for (int i = 0; i < num_env_vars; i++) {
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if (0 == internal_strcmp(name, env_vars[i].name))
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return env_vars[i].value;
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}
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CHECK_LT(num_env_vars, kEnvVariables);
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DWORD rv = GetEnvironmentVariableA(name, env_vars[num_env_vars].value,
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kMaxEnvValueLength);
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if (rv > 0 && rv < kMaxEnvValueLength) {
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CHECK_LT(internal_strlen(name), kMaxEnvNameLength);
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internal_strncpy(env_vars[num_env_vars].name, name, kMaxEnvNameLength);
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num_env_vars++;
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return env_vars[num_env_vars - 1].value;
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}
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return 0;
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}
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const char *GetPwd() {
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UNIMPLEMENTED();
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}
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u32 GetUid() {
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UNIMPLEMENTED();
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}
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namespace {
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struct ModuleInfo {
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HMODULE handle;
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uptr base_address;
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uptr end_address;
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};
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int CompareModulesBase(const void *pl, const void *pr) {
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const ModuleInfo &l = *(ModuleInfo *)pl, &r = *(ModuleInfo *)pr;
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if (l.base_address < r.base_address)
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return -1;
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return l.base_address > r.base_address;
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}
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} // namespace
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void DumpProcessMap() {
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Report("Dumping process modules:\n");
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HANDLE cur_process = GetCurrentProcess();
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// Query the list of modules. Start by assuming there are no more than 256
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// modules and retry if that's not sufficient.
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ModuleInfo *modules;
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size_t num_modules;
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{
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HMODULE *hmodules = 0;
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uptr modules_buffer_size = sizeof(HMODULE) * 256;
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DWORD bytes_required;
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while (!hmodules) {
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hmodules = (HMODULE *)MmapOrDie(modules_buffer_size, __FUNCTION__);
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CHECK(EnumProcessModules(cur_process, hmodules, modules_buffer_size,
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&bytes_required));
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if (bytes_required > modules_buffer_size) {
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// Either there turned out to be more than 256 hmodules, or new hmodules
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// could have loaded since the last try. Retry.
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UnmapOrDie(hmodules, modules_buffer_size);
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hmodules = 0;
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modules_buffer_size = bytes_required;
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}
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}
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num_modules = bytes_required / sizeof(HMODULE);
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modules =
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(ModuleInfo *)MmapOrDie(num_modules * sizeof(ModuleInfo), __FUNCTION__);
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for (size_t i = 0; i < num_modules; ++i) {
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modules[i].handle = hmodules[i];
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MODULEINFO mi;
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if (!GetModuleInformation(cur_process, hmodules[i], &mi, sizeof(mi)))
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continue;
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modules[i].base_address = (uptr)mi.lpBaseOfDll;
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modules[i].end_address = (uptr)mi.lpBaseOfDll + mi.SizeOfImage;
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}
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UnmapOrDie(hmodules, modules_buffer_size);
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}
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qsort(modules, num_modules, sizeof(ModuleInfo), CompareModulesBase);
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for (size_t i = 0; i < num_modules; ++i) {
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const ModuleInfo &mi = modules[i];
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char module_name[MAX_PATH];
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bool got_module_name = GetModuleFileNameEx(
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cur_process, mi.handle, module_name, sizeof(module_name));
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if (mi.end_address != 0) {
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Printf("\t%p-%p %s\n", mi.base_address, mi.end_address,
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got_module_name ? module_name : "[no name]");
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} else if (got_module_name) {
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Printf("\t??\?-??? %s\n", module_name);
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} else {
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Printf("\t???\n");
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}
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}
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UnmapOrDie(modules, num_modules * sizeof(ModuleInfo));
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}
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void DisableCoreDumperIfNecessary() {
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// Do nothing.
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}
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void ReExec() {
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UNIMPLEMENTED();
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}
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void PrepareForSandboxing(__sanitizer_sandbox_arguments *args) {
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(void)args;
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// Nothing here for now.
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}
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bool StackSizeIsUnlimited() {
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UNIMPLEMENTED();
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}
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void SetStackSizeLimitInBytes(uptr limit) {
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UNIMPLEMENTED();
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}
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bool AddressSpaceIsUnlimited() {
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UNIMPLEMENTED();
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}
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void SetAddressSpaceUnlimited() {
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UNIMPLEMENTED();
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}
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char *FindPathToBinary(const char *name) {
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// Nothing here for now.
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return 0;
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}
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void SleepForSeconds(int seconds) {
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Sleep(seconds * 1000);
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}
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void SleepForMillis(int millis) {
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Sleep(millis);
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}
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u64 NanoTime() {
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return 0;
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}
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void Abort() {
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if (::IsDebuggerPresent())
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__debugbreak();
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internal__exit(3);
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}
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uptr GetListOfModules(LoadedModule *modules, uptr max_modules,
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string_predicate_t filter) {
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UNIMPLEMENTED();
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};
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#ifndef SANITIZER_GO
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int Atexit(void (*function)(void)) {
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return atexit(function);
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}
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#endif
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// ------------------ sanitizer_libc.h
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uptr internal_mmap(void *addr, uptr length, int prot, int flags,
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int fd, u64 offset) {
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UNIMPLEMENTED();
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}
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uptr internal_munmap(void *addr, uptr length) {
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UNIMPLEMENTED();
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}
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uptr internal_close(fd_t fd) {
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UNIMPLEMENTED();
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}
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int internal_isatty(fd_t fd) {
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return _isatty(fd);
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}
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uptr internal_open(const char *filename, int flags) {
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UNIMPLEMENTED();
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}
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uptr internal_open(const char *filename, int flags, u32 mode) {
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UNIMPLEMENTED();
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}
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uptr OpenFile(const char *filename, bool write) {
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UNIMPLEMENTED();
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}
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uptr internal_read(fd_t fd, void *buf, uptr count) {
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UNIMPLEMENTED();
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}
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uptr internal_write(fd_t fd, const void *buf, uptr count) {
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if (fd != kStderrFd)
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UNIMPLEMENTED();
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static HANDLE output_stream = 0;
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// Abort immediately if we know printing is not possible.
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if (output_stream == INVALID_HANDLE_VALUE)
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return 0;
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// If called for the first time, try to use stderr to output stuff,
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// falling back to stdout if anything goes wrong.
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bool fallback_to_stdout = false;
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if (output_stream == 0) {
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output_stream = GetStdHandle(STD_ERROR_HANDLE);
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// We don't distinguish "no such handle" from error.
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if (output_stream == 0)
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output_stream = INVALID_HANDLE_VALUE;
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if (output_stream == INVALID_HANDLE_VALUE) {
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// Retry with stdout?
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output_stream = GetStdHandle(STD_OUTPUT_HANDLE);
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if (output_stream == 0)
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output_stream = INVALID_HANDLE_VALUE;
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if (output_stream == INVALID_HANDLE_VALUE)
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return 0;
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} else {
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// Successfully got an stderr handle. However, if WriteFile() fails,
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// we can still try to fallback to stdout.
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fallback_to_stdout = true;
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}
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}
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DWORD ret;
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if (WriteFile(output_stream, buf, count, &ret, 0))
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return ret;
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// Re-try with stdout if using a valid stderr handle fails.
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if (fallback_to_stdout) {
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output_stream = GetStdHandle(STD_OUTPUT_HANDLE);
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if (output_stream == 0)
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output_stream = INVALID_HANDLE_VALUE;
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if (output_stream != INVALID_HANDLE_VALUE)
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return internal_write(fd, buf, count);
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}
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return 0;
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}
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uptr internal_stat(const char *path, void *buf) {
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UNIMPLEMENTED();
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}
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uptr internal_lstat(const char *path, void *buf) {
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UNIMPLEMENTED();
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}
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uptr internal_fstat(fd_t fd, void *buf) {
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UNIMPLEMENTED();
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}
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uptr internal_filesize(fd_t fd) {
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UNIMPLEMENTED();
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}
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uptr internal_dup2(int oldfd, int newfd) {
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UNIMPLEMENTED();
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}
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uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
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UNIMPLEMENTED();
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}
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uptr internal_sched_yield() {
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Sleep(0);
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return 0;
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}
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void internal__exit(int exitcode) {
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ExitProcess(exitcode);
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}
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uptr internal_ftruncate(fd_t fd, uptr size) {
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UNIMPLEMENTED();
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}
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uptr internal_rename(const char *oldpath, const char *newpath) {
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UNIMPLEMENTED();
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}
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uptr GetRSS() {
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return 0;
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}
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void *internal_start_thread(void (*func)(void *arg), void *arg) { return 0; }
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void internal_join_thread(void *th) { }
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// ---------------------- BlockingMutex ---------------- {{{1
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const uptr LOCK_UNINITIALIZED = 0;
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const uptr LOCK_READY = (uptr)-1;
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BlockingMutex::BlockingMutex(LinkerInitialized li) {
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// FIXME: see comments in BlockingMutex::Lock() for the details.
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CHECK(li == LINKER_INITIALIZED || owner_ == LOCK_UNINITIALIZED);
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CHECK(sizeof(CRITICAL_SECTION) <= sizeof(opaque_storage_));
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InitializeCriticalSection((LPCRITICAL_SECTION)opaque_storage_);
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owner_ = LOCK_READY;
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}
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BlockingMutex::BlockingMutex() {
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CHECK(sizeof(CRITICAL_SECTION) <= sizeof(opaque_storage_));
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InitializeCriticalSection((LPCRITICAL_SECTION)opaque_storage_);
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owner_ = LOCK_READY;
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}
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void BlockingMutex::Lock() {
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if (owner_ == LOCK_UNINITIALIZED) {
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// FIXME: hm, global BlockingMutex objects are not initialized?!?
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// This might be a side effect of the clang+cl+link Frankenbuild...
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new(this) BlockingMutex((LinkerInitialized)(LINKER_INITIALIZED + 1));
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// FIXME: If it turns out the linker doesn't invoke our
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// constructors, we should probably manually Lock/Unlock all the global
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// locks while we're starting in one thread to avoid double-init races.
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}
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EnterCriticalSection((LPCRITICAL_SECTION)opaque_storage_);
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CHECK_EQ(owner_, LOCK_READY);
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owner_ = GetThreadSelf();
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}
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void BlockingMutex::Unlock() {
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CHECK_EQ(owner_, GetThreadSelf());
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owner_ = LOCK_READY;
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LeaveCriticalSection((LPCRITICAL_SECTION)opaque_storage_);
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}
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void BlockingMutex::CheckLocked() {
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CHECK_EQ(owner_, GetThreadSelf());
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}
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uptr GetTlsSize() {
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return 0;
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}
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void InitTlsSize() {
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}
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void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
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uptr *tls_addr, uptr *tls_size) {
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#ifdef SANITIZER_GO
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*stk_addr = 0;
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*stk_size = 0;
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*tls_addr = 0;
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*tls_size = 0;
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#else
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uptr stack_top, stack_bottom;
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GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom);
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*stk_addr = stack_bottom;
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*stk_size = stack_top - stack_bottom;
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*tls_addr = 0;
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*tls_size = 0;
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#endif
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}
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#if !SANITIZER_GO
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void BufferedStackTrace::SlowUnwindStack(uptr pc, uptr max_depth) {
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CHECK_GE(max_depth, 2);
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// FIXME: CaptureStackBackTrace might be too slow for us.
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// FIXME: Compare with StackWalk64.
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// FIXME: Look at LLVMUnhandledExceptionFilter in Signals.inc
|
|
size = CaptureStackBackTrace(2, Min(max_depth, kStackTraceMax),
|
|
(void**)trace, 0);
|
|
if (size == 0)
|
|
return;
|
|
|
|
// Skip the RTL frames by searching for the PC in the stacktrace.
|
|
uptr pc_location = LocatePcInTrace(pc);
|
|
PopStackFrames(pc_location);
|
|
}
|
|
|
|
void BufferedStackTrace::SlowUnwindStackWithContext(uptr pc, void *context,
|
|
uptr max_depth) {
|
|
CONTEXT ctx = *(CONTEXT *)context;
|
|
STACKFRAME64 stack_frame;
|
|
memset(&stack_frame, 0, sizeof(stack_frame));
|
|
size = 0;
|
|
#if defined(_WIN64)
|
|
int machine_type = IMAGE_FILE_MACHINE_AMD64;
|
|
stack_frame.AddrPC.Offset = ctx.Rip;
|
|
stack_frame.AddrFrame.Offset = ctx.Rbp;
|
|
stack_frame.AddrStack.Offset = ctx.Rsp;
|
|
#else
|
|
int machine_type = IMAGE_FILE_MACHINE_I386;
|
|
stack_frame.AddrPC.Offset = ctx.Eip;
|
|
stack_frame.AddrFrame.Offset = ctx.Ebp;
|
|
stack_frame.AddrStack.Offset = ctx.Esp;
|
|
#endif
|
|
stack_frame.AddrPC.Mode = AddrModeFlat;
|
|
stack_frame.AddrFrame.Mode = AddrModeFlat;
|
|
stack_frame.AddrStack.Mode = AddrModeFlat;
|
|
while (StackWalk64(machine_type, GetCurrentProcess(), GetCurrentThread(),
|
|
&stack_frame, &ctx, NULL, &SymFunctionTableAccess64,
|
|
&SymGetModuleBase64, NULL) &&
|
|
size < Min(max_depth, kStackTraceMax)) {
|
|
trace_buffer[size++] = (uptr)stack_frame.AddrPC.Offset;
|
|
}
|
|
}
|
|
#endif // #if !SANITIZER_GO
|
|
|
|
void ReportFile::Write(const char *buffer, uptr length) {
|
|
SpinMutexLock l(mu);
|
|
ReopenIfNecessary();
|
|
if (length != internal_write(fd, buffer, length)) {
|
|
// stderr may be closed, but we may be able to print to the debugger
|
|
// instead. This is the case when launching a program from Visual Studio,
|
|
// and the following routine should write to its console.
|
|
OutputDebugStringA(buffer);
|
|
}
|
|
}
|
|
|
|
void SetAlternateSignalStack() {
|
|
// FIXME: Decide what to do on Windows.
|
|
}
|
|
|
|
void UnsetAlternateSignalStack() {
|
|
// FIXME: Decide what to do on Windows.
|
|
}
|
|
|
|
void InstallDeadlySignalHandlers(SignalHandlerType handler) {
|
|
(void)handler;
|
|
// FIXME: Decide what to do on Windows.
|
|
}
|
|
|
|
bool IsDeadlySignal(int signum) {
|
|
// FIXME: Decide what to do on Windows.
|
|
return false;
|
|
}
|
|
|
|
bool IsAccessibleMemoryRange(uptr beg, uptr size) {
|
|
// FIXME: Actually implement this function.
|
|
return true;
|
|
}
|
|
|
|
} // namespace __sanitizer
|
|
|
|
#endif // _WIN32
|