From 43f7a588f96aaf88e7b69441c3b50bc9c7b20df7 Mon Sep 17 00:00:00 2001 From: wolfbeast <mcwerewolf@gmail.com> Date: Thu, 3 May 2018 05:55:15 +0200 Subject: Nuke the sandbox --- security/sandbox/chromium/base/debug/profiler.cc | 221 ----------------------- 1 file changed, 221 deletions(-) delete mode 100644 security/sandbox/chromium/base/debug/profiler.cc (limited to 'security/sandbox/chromium/base/debug/profiler.cc') 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 -- cgit v1.2.3