Vyacheslav Egorov
6e28f8bb40
Don't mark SP as clobbered because newer clang versions do not like that. Fixes https://github.com/dart-lang/sdk/issues/46873 TEST=ci Cq-Include-Trybots: luci.dart.try:vm-ffi-android-release-arm-try,vm-ffi-android-product-arm-try Change-Id: I5b794e7bb02e62576c4c40b8132f9c798cb7639c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/209917 Commit-Queue: Slava Egorov <vegorov@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>
98 lines
3.1 KiB
C++
98 lines
3.1 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(DART_HOST_OS_MACOS)
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#include <assert.h> // NOLINT
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#include <errno.h> // NOLINT
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#include <stdbool.h> // NOLINT
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#include <sys/sysctl.h> // NOLINT
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#include <sys/types.h> // NOLINT
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#include <unistd.h> // NOLINT
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#include "vm/flags.h"
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#include "vm/os.h"
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#include "vm/profiler.h"
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#include "vm/signal_handler.h"
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#include "vm/thread_interrupter.h"
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namespace dart {
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#ifndef PRODUCT
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DECLARE_FLAG(bool, trace_thread_interrupter);
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// Returns true if the current process is being debugged (either
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// running under the debugger or has a debugger attached post facto).
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// Code from https://developer.apple.com/library/content/qa/qa1361/_index.html
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bool ThreadInterrupter::IsDebuggerAttached() {
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struct kinfo_proc info;
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// Initialize the flags so that, if sysctl fails for some bizarre
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// reason, we get a predictable result.
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info.kp_proc.p_flag = 0;
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// Initialize mib, which tells sysctl the info we want, in this case
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// we're looking for information about a specific process ID.
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int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()};
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size_t size = sizeof(info);
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// Call sysctl.
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size = sizeof(info);
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int junk = sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, NULL, 0);
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ASSERT(junk == 0);
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// We're being debugged if the P_TRACED flag is set.
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return ((info.kp_proc.p_flag & P_TRACED) != 0);
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}
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class ThreadInterrupterMacOS : public AllStatic {
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public:
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static void ThreadInterruptSignalHandler(int signal,
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siginfo_t* info,
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void* context_) {
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if (signal != SIGPROF) {
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return;
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}
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Thread* thread = Thread::Current();
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if (thread == NULL) {
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return;
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}
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ThreadInterrupter::SampleBufferWriterScope scope;
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if (!scope.CanSample()) {
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return;
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}
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// Extract thread state.
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ucontext_t* context = reinterpret_cast<ucontext_t*>(context_);
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mcontext_t mcontext = context->uc_mcontext;
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InterruptedThreadState its;
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its.pc = SignalHandler::GetProgramCounter(mcontext);
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its.fp = SignalHandler::GetFramePointer(mcontext);
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its.csp = SignalHandler::GetCStackPointer(mcontext);
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its.dsp = SignalHandler::GetDartStackPointer(mcontext);
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its.lr = SignalHandler::GetLinkRegister(mcontext);
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Profiler::SampleThread(thread, its);
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}
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};
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void ThreadInterrupter::InterruptThread(OSThread* thread) {
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if (FLAG_trace_thread_interrupter) {
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OS::PrintErr("ThreadInterrupter interrupting %p\n", thread->id());
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}
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int result = pthread_kill(thread->id(), SIGPROF);
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ASSERT((result == 0) || (result == ESRCH));
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}
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void ThreadInterrupter::InstallSignalHandler() {
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SignalHandler::Install(&ThreadInterrupterMacOS::ThreadInterruptSignalHandler);
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}
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void ThreadInterrupter::RemoveSignalHandler() {
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SignalHandler::Remove();
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}
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#endif // !PRODUCT
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} // namespace dart
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#endif // defined(DART_HOST_OS_MACOS)
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