55a89a48f4
- Move all ScopedDisableDebugCalls into the debug_XXX calls. This avoids any issues that might arise where every part of the code needs to properly guard anything that might allocate. Instead everything is already guarded. - Add a pointer to debug_data in all of the XXData classes. This avoids calling individual functions passing in the debug_data pointer. - Flip the NO_HEADER_OPTIONS to an explicit HEADER_OPTIONS list since fewer options actually require a header. - Move the extern of g_debug to the DebugData.h header. Change-Id: Ia213a391b4a44d9ce122a709d09fe4f1b5426f36
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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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
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* 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
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <errno.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <private/bionic_macros.h>
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#include "BacktraceData.h"
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#include "Config.h"
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#include "DebugData.h"
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#include "debug_log.h"
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#include "malloc_debug.h"
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static void EnableToggle(int, siginfo_t*, void*) {
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if (g_debug->backtrace->enabled()) {
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g_debug->backtrace->set_enabled(false);
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} else {
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g_debug->backtrace->set_enabled(true);
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}
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}
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BacktraceData::BacktraceData(DebugData* debug_data, const Config& config, size_t* offset)
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: OptionData(debug_data) {
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size_t hdr_len = sizeof(BacktraceHeader) + sizeof(uintptr_t) * config.backtrace_frames;
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alloc_offset_ = *offset;
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*offset += BIONIC_ALIGN(hdr_len, MINIMUM_ALIGNMENT_BYTES);
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}
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bool BacktraceData::Initialize(const Config& config) {
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enabled_ = config.backtrace_enabled;
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if (config.backtrace_enable_on_signal) {
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struct sigaction enable_act;
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memset(&enable_act, 0, sizeof(enable_act));
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enable_act.sa_sigaction = EnableToggle;
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enable_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
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sigemptyset(&enable_act.sa_mask);
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if (sigaction(config.backtrace_signal, &enable_act, nullptr) != 0) {
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error_log("Unable to set up backtrace signal enable function: %s", strerror(errno));
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return false;
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}
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info_log("%s: Run: 'kill -%d %d' to enable backtracing.", getprogname(),
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config.backtrace_signal, getpid());
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}
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return true;
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}
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