a613d0df5c
While this was never an inline, this function alone has caused most of
the bug reports related to _FILE_OFFSET_BITS=64. Providing an inline
for it should allow a lot more code to build with _FILE_OFFSET_BITS=64
when targeting pre-L.
Test: make checkbuild
Test: built trivial cc_binary for LP32 against API 14 with
_FILE_OFFSET_BITS=64 set
Bug: lots
Change-Id: I8479d34af4da358c11423bee43d45b59e9d4143e
91 lines
3.3 KiB
C++
91 lines
3.3 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 ToggleBacktraceEnable(int, siginfo_t*, void*) {
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g_debug->backtrace->ToggleBacktraceEnabled();
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}
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static void EnableDump(int, siginfo_t*, void*) {
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g_debug->backtrace->EnableDumping();
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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 = ToggleBacktraceEnable;
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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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struct sigaction act;
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memset(&act, 0, sizeof(act));
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act.sa_sigaction = EnableDump;
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act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
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sigemptyset(&act.sa_mask);
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if (sigaction(config.backtrace_dump_signal(), &act, nullptr) != 0) {
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error_log("Unable to set up backtrace dump signal 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 dump the backtrace.", getprogname(),
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config.backtrace_dump_signal(), getpid());
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dump_ = false;
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return true;
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}
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