1 files changed, 162 insertions, 0 deletions
diff --git a/mozglue/baseprofiler/core/ProfilerUtils.cpp b/mozglue/baseprofiler/core/ProfilerUtils.cpp
new file mode 100644
index 0000000000..5f53910774
--- /dev/null
+++ b/mozglue/baseprofiler/core/ProfilerUtils.cpp
@@ -0,0 +1,162 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This file implements functions from BaseProfilerUtils.h on all platforms.
+// Functions with platform-specific implementations are separated in #if blocks
+// below, with each block being self-contained with all the #includes and
+// definitions it needs, to keep platform code easier to maintain in isolation.
+
+#include "mozilla/BaseProfilerUtils.h"
+
+// --------------------------------------------- WASI process & thread ids
+#if defined(__wasi__)
+
+namespace mozilla::baseprofiler {
+
+// WASI is single-process and single-thread for now.
+
+BaseProfilerProcessId profiler_current_process_id() {
+  return BaseProfilerProcessId::FromNativeId(1u);
+}
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  return BaseProfilerThreadId::FromNativeId(1u);
+}
+
+}  // namespace mozilla::baseprofiler
+
+// --------------------------------------------- Windows process & thread ids
+#elif defined(XP_WIN)
+
+#  include <process.h>
+#  include <processthreadsapi.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerProcessId profiler_current_process_id() {
+  return BaseProfilerProcessId::FromNativeId(_getpid());
+}
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  static_assert(std::is_same_v<BaseProfilerThreadId::NativeType,
+                               decltype(GetCurrentThreadId())>,
+                "BaseProfilerThreadId::NativeType must be exactly the type "
+                "returned by GetCurrentThreadId()");
+  return BaseProfilerThreadId::FromNativeId(GetCurrentThreadId());
+}
+
+}  // namespace mozilla::baseprofiler
+
+// --------------------------------------------- Non-Windows process id
+#else
+// All non-Windows platforms are assumed to be POSIX, which has getpid().
+
+#  include <unistd.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerProcessId profiler_current_process_id() {
+  return BaseProfilerProcessId::FromNativeId(getpid());
+}
+
+}  // namespace mozilla::baseprofiler
+
+// --------------------------------------------- Non-Windows thread id
+// ------------------------------------------------------- macOS
+#  if defined(XP_MACOSX)
+
+#    include <pthread.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  uint64_t tid;
+  if (pthread_threadid_np(nullptr, &tid) != 0) {
+    return BaseProfilerThreadId{};
+  }
+  return BaseProfilerThreadId::FromNativeId(tid);
+}
+
+}  // namespace mozilla::baseprofiler
+
+// ------------------------------------------------------- Android
+// Test Android before Linux, because Linux includes Android.
+#  elif defined(__ANDROID__) || defined(ANDROID)
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  return BaseProfilerThreadId::FromNativeId(gettid());
+}
+
+}  // namespace mozilla::baseprofiler
+
+// ------------------------------------------------------- Linux
+#  elif defined(XP_LINUX)
+
+#    include <sys/syscall.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  // glibc doesn't provide a wrapper for gettid() until 2.30
+  return BaseProfilerThreadId::FromNativeId(syscall(SYS_gettid));
+}
+
+}  // namespace mozilla::baseprofiler
+
+// ------------------------------------------------------- FreeBSD
+#  elif defined(XP_FREEBSD)
+
+#    include <sys/thr.h>
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  long id;
+  if (thr_self(&id) != 0) {
+    return BaseProfilerThreadId{};
+  }
+  return BaseProfilerThreadId::FromNativeId(id);
+}
+
+}  // namespace mozilla::baseprofiler
+
+// ------------------------------------------------------- Others
+#  else
+
+namespace mozilla::baseprofiler {
+
+BaseProfilerThreadId profiler_current_thread_id() {
+  return BaseProfilerThreadId::FromNativeId(std::this_thread::get_id());
+}
+
+}  // namespace mozilla::baseprofiler
+
+#  endif
+#endif  // End of non-XP_WIN.
+
+// --------------------------------------------- Platform-agnostic definitions
+
+namespace mozilla::baseprofiler {
+
+static BaseProfilerThreadId scBaseProfilerMainThreadId{};
+
+void profiler_init_main_thread_id() {
+  if (!scBaseProfilerMainThreadId.IsSpecified()) {
+    scBaseProfilerMainThreadId = profiler_current_thread_id();
+  }
+}
+
+BaseProfilerThreadId profiler_main_thread_id() {
+  return scBaseProfilerMainThreadId;
+}
+
+bool profiler_is_main_thread() {
+  return profiler_current_thread_id() == scBaseProfilerMainThreadId;
+}
+
+}  // namespace mozilla::baseprofiler