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Kernel: Don't dump perfcore for non-dumpable processes

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Fixes #4904
This commit is contained in:
Andreas Kling 2021-01-11 18:53:45 +01:00
parent cf3d2411fa
commit 5c73c1bff8
2 changed files with 36 additions and 30 deletions
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64
Kernel/Process.cpp
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@ -590,6 +590,35 @@ KResultOr<String> Process::get_syscall_path_argument(const Syscall::StringArgume
return get_syscall_path_argument(path.characters, path.length);
}
bool Process::dump_core()
{
ASSERT(is_dumpable());
ASSERT(should_core_dump());
dbgln("Generating coredump for pid: {}", m_pid.value());
auto coredump_path = String::formatted("/tmp/coredump/{}_{}_{}", name(), m_pid.value(), RTC::now());
auto coredump = CoreDump::create(*this, coredump_path);
if (!coredump)
return false;
return !coredump->write().is_error();
}
bool Process::dump_perfcore()
{
ASSERT(is_dumpable());
ASSERT(m_perf_event_buffer);
dbgln("Generating perfcore for pid: {}", m_pid.value());
auto description_or_error = VFS::the().open(String::formatted("perfcore.{}", m_pid.value()), O_CREAT | O_EXCL, 0400, current_directory(), UidAndGid { m_uid, m_gid });
if (description_or_error.is_error())
return false;
auto& description = description_or_error.value();
auto json = m_perf_event_buffer->to_json(m_pid, m_executable ? m_executable->absolute_path() : "");
if (!json)
return false;
auto json_buffer = UserOrKernelBuffer::for_kernel_buffer(json->data());
return !description->write(json_buffer, json->size()).is_error();
}
void Process::finalize()
{
ASSERT(Thread::current() == g_finalizer);
@ -597,35 +626,11 @@ void Process::finalize()
dbg() << "Finalizing process " << *this;
#endif
if (m_should_dump_core) {
dbgln("Generating coredump for pid: {}", m_pid.value());
auto coredump_path = String::formatted("/tmp/coredump/{}_{}_{}", name(), m_pid.value(), RTC::now());
auto coredump = CoreDump::create(*this, coredump_path);
if (coredump) {
auto result = coredump->write();
if (result.is_error())
dbgln("Core dump generation failed: {}", result.error());
} else {
dbgln("Could not create coredump");
}
}
if (m_perf_event_buffer) {
auto description_or_error = VFS::the().open(String::formatted("perfcore.{}", m_pid.value()), O_CREAT | O_EXCL, 0400, current_directory(), UidAndGid { m_uid, m_gid });
if (!description_or_error.is_error()) {
auto& description = description_or_error.value();
auto json = m_perf_event_buffer->to_json(m_pid, m_executable ? m_executable->absolute_path() : "");
if (!json) {
dbgln("Error generating perfcore JSON");
} else {
auto json_buffer = UserOrKernelBuffer::for_kernel_buffer(json->data());
auto result = description->write(json_buffer, json->size());
if (result.is_error()) {
dbgln("Error while writing perfcore file: {}", result.error().error());
}
}
}
if (is_dumpable()) {
if (m_should_dump_core)
dump_core();
if (m_perf_event_buffer)
dump_perfcore();
}
if (m_alarm_timer)
@ -918,5 +923,4 @@ PerformanceEventBuffer& Process::ensure_perf_events()
m_perf_event_buffer = make<PerformanceEventBuffer>();
return *m_perf_event_buffer;
}
}