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/*
* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/LexicalPath.h>
#include <LibCore/FileWatcher.h>
#include <LibCoreDump/Backtrace.h>
#include <LibCoreDump/Reader.h>
#include <serenity.h>
#include <spawn.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
static void wait_until_coredump_is_ready(const String& coredump_path)
{
while (true) {
struct stat statbuf;
if (stat(coredump_path.characters(), &statbuf) < 0) {
perror("stat");
VERIFY_NOT_REACHED();
}
if (statbuf.st_mode & 0400) // Check if readable
break;
usleep(10000); // sleep for 10ms
}
}
static void print_backtrace(const String& coredump_path)
{
auto coredump = CoreDump::Reader::create(coredump_path);
if (!coredump) {
dbgln("Could not open coredump '{}'", coredump_path);
return;
}
size_t thread_index = 0;
coredump->for_each_thread_info([&](auto& thread_info) {
CoreDump::Backtrace backtrace(*coredump, thread_info);
if (thread_index > 0)
dbgln();
dbgln("--- Backtrace for thread #{} (TID {}) ---", thread_index, thread_info.tid);
for (auto& entry : backtrace.entries())
dbgln("{}", entry.to_string(true));
++thread_index;
return IterationDecision::Continue;
});
}
static void launch_crash_reporter(const String& coredump_path)
{
pid_t child;
const char* argv[] = { "CrashReporter", coredump_path.characters(), nullptr, nullptr };
if ((errno = posix_spawn(&child, "/bin/CrashReporter", nullptr, nullptr, const_cast<char**>(argv), environ))) {
perror("posix_spawn");
} else {
if (disown(child) < 0)
perror("disown");
}
}
int main()
{
if (pledge("stdio rpath proc exec", nullptr) < 0) {
perror("pledge");
return 1;
}
Core::BlockingFileWatcher watcher { "/tmp/coredump" };
while (true) {
auto event = watcher.wait_for_event();
VERIFY(event.has_value());
if (event.value().type != Core::FileWatcherEvent::Type::ChildAdded)
continue;
auto coredump_path = event.value().child_path;
dbgln("New coredump file: {}", coredump_path);
wait_until_coredump_is_ready(coredump_path);
print_backtrace(coredump_path);
launch_crash_reporter(coredump_path);
}
}
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