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95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
// Copyright 2018 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_SAMPLING_HEAP_PROFILER_MODULE_CACHE_H_
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#define BASE_SAMPLING_HEAP_PROFILER_MODULE_CACHE_H_
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#include <map>
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#include <string>
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#include <vector>
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#include "base/base_export.h"
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#include "base/files/file_path.h"
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#include "build/build_config.h"
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#if defined(OS_WIN)
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#include <windows.h>
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#endif
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namespace base {
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class BASE_EXPORT ModuleCache {
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public:
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// Module represents the module (DLL or exe) and its validness state.
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// This struct is used for sampling data transfer from NativeStackSampler
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// to ProfileBuilder as well as by SamplingHeapProfiler.
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struct BASE_EXPORT Module {
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Module();
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Module(uintptr_t base_address,
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const std::string& id,
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const FilePath& filename);
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Module(uintptr_t base_address,
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const std::string& id,
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const FilePath& filename,
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size_t size);
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~Module();
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// Points to the base address of the module.
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uintptr_t base_address;
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// An opaque binary string that uniquely identifies a particular program
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// version with high probability. This is parsed from headers of the loaded
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// module.
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// For binaries generated by GNU tools:
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// Contents of the .note.gnu.build-id field.
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// On Windows:
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// GUID + AGE in the debug image headers of a module.
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std::string id;
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// The filename of the module.
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FilePath filename;
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// The validness of the module.
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bool is_valid;
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// Size of the module.
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size_t size;
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};
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ModuleCache();
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~ModuleCache();
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void Clear() { modules_cache_map_.clear(); }
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const Module& GetModuleForAddress(uintptr_t address);
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std::vector<const Module*> GetModules() const;
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private:
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// TODO(alph): Refactor corresponding functions to use public API instead,
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// and drop friends.
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// Creates a Module object for the specified memory address. If the address
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// does not belong to a module returns an invalid module.
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static Module CreateModuleForAddress(uintptr_t address);
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friend class NativeStackSamplerMac;
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#if defined(OS_MACOSX)
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// Returns the size of the _TEXT segment of the module loaded
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// at |module_addr|.
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static size_t GetModuleTextSize(const void* module_addr);
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friend bool MayTriggerUnwInitLocalCrash(uint64_t);
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#endif
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#if defined(OS_WIN)
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static Module CreateModuleForHandle(HMODULE module_handle);
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friend class NativeStackSamplerWin;
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#endif
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std::map<uintptr_t, Module> modules_cache_map_;
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};
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} // namespace base
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#endif // BASE_SAMPLING_HEAP_PROFILER_MODULE_CACHE_H_
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