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authorwolfbeast <mcwerewolf@gmail.com>2018-05-03 05:55:15 +0200
committerwolfbeast <mcwerewolf@gmail.com>2018-05-03 05:55:15 +0200
commit43f7a588f96aaf88e7b69441c3b50bc9c7b20df7 (patch)
tree07d9b26b2f357ee9de04fea0e5e4b8b9a1ff93a4 /security/sandbox/chromium/base/debug/profiler.cc
parent4613b91ecac2745252c40be64e73de5ff920b02b (diff)
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Nuke the sandbox
Diffstat (limited to 'security/sandbox/chromium/base/debug/profiler.cc')
-rw-r--r--security/sandbox/chromium/base/debug/profiler.cc221
1 files changed, 0 insertions, 221 deletions
diff --git a/security/sandbox/chromium/base/debug/profiler.cc b/security/sandbox/chromium/base/debug/profiler.cc
deleted file mode 100644
index 75e9aac0c..000000000
--- a/security/sandbox/chromium/base/debug/profiler.cc
+++ /dev/null
@@ -1,221 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/debug/profiler.h"
-
-#include <string>
-
-#include "base/debug/debugging_flags.h"
-#include "base/process/process_handle.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_util.h"
-#include "build/build_config.h"
-
-#if defined(OS_WIN)
-#include "base/win/pe_image.h"
-#endif // defined(OS_WIN)
-
-// TODO(peria): Enable profiling on Windows.
-#if BUILDFLAG(ENABLE_PROFILING) && !defined(NO_TCMALLOC) && !defined(OS_WIN)
-#include "third_party/tcmalloc/chromium/src/gperftools/profiler.h"
-#endif
-
-namespace base {
-namespace debug {
-
-// TODO(peria): Enable profiling on Windows.
-#if BUILDFLAG(ENABLE_PROFILING) && !defined(NO_TCMALLOC) && !defined(OS_WIN)
-
-static int profile_count = 0;
-
-void StartProfiling(const std::string& name) {
- ++profile_count;
- std::string full_name(name);
- std::string pid = IntToString(GetCurrentProcId());
- std::string count = IntToString(profile_count);
- ReplaceSubstringsAfterOffset(&full_name, 0, "{pid}", pid);
- ReplaceSubstringsAfterOffset(&full_name, 0, "{count}", count);
- ProfilerStart(full_name.c_str());
-}
-
-void StopProfiling() {
- ProfilerFlush();
- ProfilerStop();
-}
-
-void FlushProfiling() {
- ProfilerFlush();
-}
-
-bool BeingProfiled() {
- return ProfilingIsEnabledForAllThreads();
-}
-
-void RestartProfilingAfterFork() {
- ProfilerRegisterThread();
-}
-
-#else
-
-void StartProfiling(const std::string& name) {
-}
-
-void StopProfiling() {
-}
-
-void FlushProfiling() {
-}
-
-bool BeingProfiled() {
- return false;
-}
-
-void RestartProfilingAfterFork() {
-}
-
-#endif
-
-#if !defined(OS_WIN)
-
-bool IsBinaryInstrumented() {
- return false;
-}
-
-ReturnAddressLocationResolver GetProfilerReturnAddrResolutionFunc() {
- return NULL;
-}
-
-DynamicFunctionEntryHook GetProfilerDynamicFunctionEntryHookFunc() {
- return NULL;
-}
-
-AddDynamicSymbol GetProfilerAddDynamicSymbolFunc() {
- return NULL;
-}
-
-MoveDynamicSymbol GetProfilerMoveDynamicSymbolFunc() {
- return NULL;
-}
-
-#else // defined(OS_WIN)
-
-// http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
-extern "C" IMAGE_DOS_HEADER __ImageBase;
-
-bool IsBinaryInstrumented() {
- enum InstrumentationCheckState {
- UNINITIALIZED,
- INSTRUMENTED_IMAGE,
- NON_INSTRUMENTED_IMAGE,
- };
-
- static InstrumentationCheckState state = UNINITIALIZED;
-
- if (state == UNINITIALIZED) {
- HMODULE this_module = reinterpret_cast<HMODULE>(&__ImageBase);
- base::win::PEImage image(this_module);
-
- // Check to be sure our image is structured as we'd expect.
- DCHECK(image.VerifyMagic());
-
- // Syzygy-instrumented binaries contain a PE image section named ".thunks",
- // and all Syzygy-modified binaries contain the ".syzygy" image section.
- // This is a very fast check, as it only looks at the image header.
- if ((image.GetImageSectionHeaderByName(".thunks") != NULL) &&
- (image.GetImageSectionHeaderByName(".syzygy") != NULL)) {
- state = INSTRUMENTED_IMAGE;
- } else {
- state = NON_INSTRUMENTED_IMAGE;
- }
- }
- DCHECK(state != UNINITIALIZED);
-
- return state == INSTRUMENTED_IMAGE;
-}
-
-namespace {
-
-struct FunctionSearchContext {
- const char* name;
- FARPROC function;
-};
-
-// Callback function to PEImage::EnumImportChunks.
-bool FindResolutionFunctionInImports(
- const base::win::PEImage &image, const char* module_name,
- PIMAGE_THUNK_DATA unused_name_table, PIMAGE_THUNK_DATA import_address_table,
- PVOID cookie) {
- FunctionSearchContext* context =
- reinterpret_cast<FunctionSearchContext*>(cookie);
-
- DCHECK_NE(static_cast<FunctionSearchContext*>(NULL), context);
- DCHECK_EQ(static_cast<FARPROC>(NULL), context->function);
-
- // Our import address table contains pointers to the functions we import
- // at this point. Let's retrieve the first such function and use it to
- // find the module this import was resolved to by the loader.
- const wchar_t* function_in_module =
- reinterpret_cast<const wchar_t*>(import_address_table->u1.Function);
-
- // Retrieve the module by a function in the module.
- const DWORD kFlags = GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
- GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT;
- HMODULE module = NULL;
- if (!::GetModuleHandleEx(kFlags, function_in_module, &module)) {
- // This can happen if someone IAT patches us to a thunk.
- return true;
- }
-
- // See whether this module exports the function we're looking for.
- FARPROC exported_func = ::GetProcAddress(module, context->name);
- if (exported_func != NULL) {
- // We found it, return the function and terminate the enumeration.
- context->function = exported_func;
- return false;
- }
-
- // Keep going.
- return true;
-}
-
-template <typename FunctionType>
-FunctionType FindFunctionInImports(const char* function_name) {
- if (!IsBinaryInstrumented())
- return NULL;
-
- HMODULE this_module = reinterpret_cast<HMODULE>(&__ImageBase);
- base::win::PEImage image(this_module);
-
- FunctionSearchContext ctx = { function_name, NULL };
- image.EnumImportChunks(FindResolutionFunctionInImports, &ctx);
-
- return reinterpret_cast<FunctionType>(ctx.function);
-}
-
-} // namespace
-
-ReturnAddressLocationResolver GetProfilerReturnAddrResolutionFunc() {
- return FindFunctionInImports<ReturnAddressLocationResolver>(
- "ResolveReturnAddressLocation");
-}
-
-DynamicFunctionEntryHook GetProfilerDynamicFunctionEntryHookFunc() {
- return FindFunctionInImports<DynamicFunctionEntryHook>(
- "OnDynamicFunctionEntry");
-}
-
-AddDynamicSymbol GetProfilerAddDynamicSymbolFunc() {
- return FindFunctionInImports<AddDynamicSymbol>(
- "AddDynamicSymbol");
-}
-
-MoveDynamicSymbol GetProfilerMoveDynamicSymbolFunc() {
- return FindFunctionInImports<MoveDynamicSymbol>(
- "MoveDynamicSymbol");
-}
-
-#endif // defined(OS_WIN)
-
-} // namespace debug
-} // namespace base