59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
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// Copyright 2019 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_PROFILER_NATIVE_UNWINDER_MAC_H_
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#define BASE_PROFILER_NATIVE_UNWINDER_MAC_H_
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#include <libunwind.h>
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#include "base/macros.h"
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#include "base/optional.h"
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#include "base/profiler/unwinder.h"
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namespace base {
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// Native unwinder implementation for Mac, using libunwind.
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class NativeUnwinderMac : public Unwinder {
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public:
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NativeUnwinderMac(ModuleCache* module_cache);
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NativeUnwinderMac(const NativeUnwinderMac&) = delete;
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NativeUnwinderMac& operator=(const NativeUnwinderMac&) = delete;
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// Unwinder:
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bool CanUnwindFrom(const Frame& current_frame) const override;
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UnwindResult TryUnwind(RegisterContext* thread_context,
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uintptr_t stack_top,
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ModuleCache* module_cache,
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std::vector<Frame>* stack) const override;
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private:
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Optional<UnwindResult> CheckPreconditions(const Frame* current_frame,
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unw_cursor_t* unwind_cursor,
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uintptr_t stack_top) const;
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// Returns the result from unw_step.
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int UnwindStep(unw_context_t* unwind_context,
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unw_cursor_t* cursor,
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bool at_first_frame,
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ModuleCache* module_cache) const;
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Optional<UnwindResult> CheckPostconditions(int step_result,
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unw_word_t prev_rsp,
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unw_word_t rsp,
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uintptr_t stack_top,
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bool* should_record_frame) const;
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// Cached pointer to the libsystem_kernel module.
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const ModuleCache::Module* const libsystem_kernel_module_;
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// The address range of |_sigtramp|, the signal trampoline function.
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uintptr_t sigtramp_start_;
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uintptr_t sigtramp_end_;
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};
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} // namespace base
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#endif // BASE_PROFILER_NATIVE_UNWINDER_MAC_H_
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