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https://github.com/RGBCube/serenity
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5dafb72370
This patch merges the profiling functionality in the kernel with the performance events mechanism. A profiler sample is now just another perf event, rather than a dedicated thing. Since perf events were already per-process, this now makes profiling per-process as well. Processes with perf events would already write out a perfcore.PID file to the current directory on death, but since we may want to profile a process and then let it continue running, recorded perf events can now be accessed at any time via /proc/PID/perf_events. This patch also adds information about process memory regions to the perfcore JSON format. This removes the need to supply a core dump to the Profiler app for symbolication, and so the "profiler coredump" mechanism is removed entirely. There's still a hard limit of 4MB worth of perf events per process, so this is by no means a perfect final design, but it's a nice step forward for both simplicity and stability. Fixes #4848 Fixes #4849
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/*
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* Copyright (c) 2018-2020, 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 <stdio.h>
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#include <unistd.h>
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__BEGIN_DECLS
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int disown(pid_t);
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int shbuf_create(int, void** buffer);
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int shbuf_allow_pid(int, pid_t peer_pid);
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int shbuf_allow_all(int);
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void* shbuf_get(int shbuf_id, size_t* size);
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int shbuf_release(int shbuf_id);
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int shbuf_seal(int shbuf_id);
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int module_load(const char* path, size_t path_length);
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int module_unload(const char* name, size_t name_length);
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int profiling_enable(pid_t);
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int profiling_disable(pid_t);
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#define THREAD_PRIORITY_MIN 1
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#define THREAD_PRIORITY_LOW 10
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#define THREAD_PRIORITY_NORMAL 30
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#define THREAD_PRIORITY_HIGH 50
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#define THREAD_PRIORITY_MAX 99
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int set_thread_boost(pid_t tid, int amount);
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int set_process_boost(pid_t, int amount);
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#define FUTEX_WAIT 1
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#define FUTEX_WAKE 2
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int futex(int32_t* userspace_address, int futex_op, int32_t value, const struct timespec* timeout);
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#define PURGE_ALL_VOLATILE 0x1
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#define PURGE_ALL_CLEAN_INODE 0x2
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int purge(int mode);
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#define PERF_EVENT_SAMPLE 0
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#define PERF_EVENT_MALLOC 1
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#define PERF_EVENT_FREE 2
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int perf_event(int type, uintptr_t arg1, uintptr_t arg2);
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int get_stack_bounds(uintptr_t* user_stack_base, size_t* user_stack_size);
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#ifdef __i386__
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ALWAYS_INLINE void send_secret_data_to_userspace_emulator(uintptr_t data1, uintptr_t data2, uintptr_t data3)
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{
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asm volatile(
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".byte 0xd6\n"
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".byte 0xd6\n" ::
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: "eax");
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asm volatile(
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"push %%eax\n"
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"push %%ecx\n"
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"push %%edx\n"
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"pop %%edx\n"
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"pop %%ecx\n"
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"pop %%eax\n" ::"a"(data1),
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"c"(data2), "d"(data3)
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: "memory");
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}
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#elif __x86_64__
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ALWAYS_INLINE void send_secret_data_to_userspace_emulator(uintptr_t, uintptr_t, uintptr_t)
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{
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}
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#endif
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__END_DECLS
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