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5e7abea31e
The perfcore file format was previously limited to a single process since the pid/executable/regions data was top-level in the JSON. This patch moves the process-specific data into a top-level array named "processes" and we now add entries for each process that has been sampled during the profile run. This makes it possible to see samples from multiple threads when viewing a perfcore file with Profiler. This is extremely cool! :^)
109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <Kernel/KBuffer.h>
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#include <Kernel/KResult.h>
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namespace Kernel {
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class KBufferBuilder;
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struct [[gnu::packed]] MallocPerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] FreePerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] PerformanceEvent {
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u8 type { 0 };
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u8 stack_size { 0 };
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u32 tid { 0 };
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u64 timestamp;
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union {
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MallocPerformanceEvent malloc;
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FreePerformanceEvent free;
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} data;
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static constexpr size_t max_stack_frame_count = 32;
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FlatPtr stack[max_stack_frame_count];
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};
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class PerformanceEventBuffer {
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public:
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static OwnPtr<PerformanceEventBuffer> try_create_with_size(size_t buffer_size);
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KResult append(int type, FlatPtr arg1, FlatPtr arg2);
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KResult append_with_eip_and_ebp(u32 eip, u32 ebp, int type, FlatPtr arg1, FlatPtr arg2);
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void clear()
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{
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m_count = 0;
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}
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size_t capacity() const { return m_buffer->size() / sizeof(PerformanceEvent); }
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size_t count() const { return m_count; }
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const PerformanceEvent& at(size_t index) const
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{
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return const_cast<PerformanceEventBuffer&>(*this).at(index);
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}
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bool to_json(KBufferBuilder&) const;
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void add_process(const Process&);
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private:
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explicit PerformanceEventBuffer(NonnullOwnPtr<KBuffer>);
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struct SampledProcess {
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ProcessID pid;
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String executable;
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HashTable<ThreadID> threads;
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struct Region {
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String name;
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Range range;
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};
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Vector<Region> regions;
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};
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template<typename Serializer>
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bool to_json_impl(Serializer&) const;
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PerformanceEvent& at(size_t index);
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size_t m_count { 0 };
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NonnullOwnPtr<KBuffer> m_buffer;
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HashMap<ProcessID, NonnullOwnPtr<SampledProcess>> m_processes;
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};
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}
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