mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 16:46:26 +00:00
de8429e6a6
--HG-- rename : tools/profiler/TableTicker2.cpp => tools/profiler/BreakpadSampler.cpp rename : tools/profiler/ProfileEntry2.cpp => tools/profiler/ProfileEntry.cpp rename : tools/profiler/ProfileEntry2.h => tools/profiler/ProfileEntry.h
61 lines
2.6 KiB
C
61 lines
2.6 KiB
C
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef MOZ_UNWINDER_THREAD_2_H
|
|
#define MOZ_UNWINDER_THREAD_2_H
|
|
|
|
#include "GeckoProfilerImpl.h"
|
|
#include "ProfileEntry.h"
|
|
|
|
/* Top level exports of UnwinderThread.cpp. */
|
|
|
|
// Abstract type. A buffer which is used to transfer information between
|
|
// the sampled thread(s) and the unwinder thread(s).
|
|
typedef
|
|
struct _UnwinderThreadBuffer
|
|
UnwinderThreadBuffer;
|
|
|
|
// RUNS IN SIGHANDLER CONTEXT
|
|
// Called in the sampled thread (signal) context. Adds a ProfileEntry
|
|
// into an UnwinderThreadBuffer that the thread has previously obtained
|
|
// by a call to utb__acquire_empty_buffer.
|
|
void utb__addEntry(/*MOD*/UnwinderThreadBuffer* utb,
|
|
ProfileEntry ent);
|
|
|
|
// Create the unwinder thread. At the moment there can be only one.
|
|
void uwt__init();
|
|
|
|
// Request the unwinder thread to exit, and wait until it has done so.
|
|
void uwt__deinit();
|
|
|
|
// Registers a sampler thread for profiling. Threads must be registered
|
|
// before they are allowed to call utb__acquire_empty_buffer or
|
|
// utb__release_full_buffer.
|
|
void uwt__register_thread_for_profiling(void* stackTop);
|
|
|
|
// RUNS IN SIGHANDLER CONTEXT
|
|
// Called in the sampled thread (signal) context. Get an empty buffer
|
|
// into which ProfileEntries can be put. It may return NULL if no
|
|
// empty buffers can be found, which will be the case if the unwinder
|
|
// thread(s) have fallen behind for some reason. In this case the
|
|
// sampled thread must simply give up and return from the signal handler
|
|
// immediately, else it risks deadlock.
|
|
UnwinderThreadBuffer* uwt__acquire_empty_buffer();
|
|
|
|
// RUNS IN SIGHANDLER CONTEXT
|
|
// Called in the sampled thread (signal) context. Release a buffer
|
|
// that the sampled thread has acquired, handing the contents to
|
|
// the unwinder thread, and, if necessary, passing sufficient
|
|
// information (stack top chunk, + registers) to also do a native
|
|
// unwind. If 'ucV' is NULL, no native unwind is done. If non-NULL,
|
|
// it is assumed to point to a ucontext_t* that holds the initial
|
|
// register state for the unwind. The results of all of this are
|
|
// dumped into |aProfile| (by the unwinder thread, not the calling thread).
|
|
void uwt__release_full_buffer(ThreadProfile* aProfile,
|
|
UnwinderThreadBuffer* utb,
|
|
void* /* ucontext_t*, really */ ucV);
|
|
|
|
#endif /* ndef MOZ_UNWINDER_THREAD_2_H */
|