Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 116 insertions, 0 deletions

diff --git a/js/src/vm/GeckoProfiler-inl.h b/js/src/vm/GeckoProfiler-inl.h
new file mode 100644
index 0000000000..7abc382dc1
--- /dev/null
+++ b/js/src/vm/GeckoProfiler-inl.h
@@ -0,0 +1,116 @@
+/* -*- Mode: C++; tab-width: 8; 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/. */
+
+#ifndef vm_GeckoProfiler_inl_h
+#define vm_GeckoProfiler_inl_h
+
+#include "vm/GeckoProfiler.h"
+
+#include "vm/JSContext.h"
+#include "vm/Realm.h"
+#include "vm/Runtime.h"
+
+namespace js {
+
+inline void GeckoProfilerThread::updatePC(JSContext* cx, JSScript* script,
+                                          jsbytecode* pc) {
+  if (!cx->runtime()->geckoProfiler().enabled()) {
+    return;
+  }
+
+  uint32_t sp = profilingStack_->stackPointer;
+  if (sp - 1 < profilingStack_->stackCapacity()) {
+    MOZ_ASSERT(sp > 0);
+    MOZ_ASSERT(profilingStack_->frames[sp - 1].rawScript() == script);
+    profilingStack_->frames[sp - 1].setPC(pc);
+  }
+}
+
+/*
+ * This class is used to suppress profiler sampling during
+ * critical sections where stack state is not valid.
+ */
+class MOZ_RAII AutoSuppressProfilerSampling {
+ public:
+  explicit AutoSuppressProfilerSampling(JSContext* cx);
+
+  ~AutoSuppressProfilerSampling();
+
+ private:
+  JSContext* cx_;
+  bool previouslyEnabled_;
+};
+
+MOZ_ALWAYS_INLINE
+GeckoProfilerEntryMarker::GeckoProfilerEntryMarker(JSContext* cx,
+                                                   JSScript* script)
+    : profiler_(&cx->geckoProfiler()) {
+  if (MOZ_LIKELY(!profiler_->infraInstalled())) {
+    profiler_ = nullptr;
+#ifdef DEBUG
+    spBefore_ = 0;
+#endif
+    return;
+  }
+#ifdef DEBUG
+  spBefore_ = profiler_->stackPointer();
+#endif
+
+  // Push an sp marker frame so the profiler can correctly order JS and native
+  // stacks.
+  profiler_->profilingStack_->pushSpMarkerFrame(this);
+
+  profiler_->profilingStack_->pushJsFrame(
+      "js::RunScript",
+      /* dynamicString = */ nullptr, script, script->code(),
+      script->realm()->creationOptions().profilerRealmID());
+}
+
+MOZ_ALWAYS_INLINE
+GeckoProfilerEntryMarker::~GeckoProfilerEntryMarker() {
+  if (MOZ_LIKELY(profiler_ == nullptr)) {
+    return;
+  }
+
+  profiler_->profilingStack_->pop();  // the JS frame
+  profiler_->profilingStack_->pop();  // the SP_MARKER frame
+  MOZ_ASSERT(spBefore_ == profiler_->stackPointer());
+}
+
+MOZ_ALWAYS_INLINE
+AutoGeckoProfilerEntry::AutoGeckoProfilerEntry(
+    JSContext* cx, const char* label, JS::ProfilingCategoryPair categoryPair,
+    uint32_t flags)
+    : profiler_(&cx->geckoProfiler()) {
+  if (MOZ_LIKELY(!profiler_->infraInstalled())) {
+    profiler_ = nullptr;
+#ifdef DEBUG
+    spBefore_ = 0;
+#endif
+    return;
+  }
+#ifdef DEBUG
+  spBefore_ = profiler_->stackPointer();
+#endif
+  profiler_->profilingStack_->pushLabelFrame(label,
+                                             /* dynamicString = */ nullptr,
+                                             /* sp = */ this, categoryPair,
+                                             flags);
+}
+
+MOZ_ALWAYS_INLINE
+AutoGeckoProfilerEntry::~AutoGeckoProfilerEntry() {
+  if (MOZ_LIKELY(!profiler_)) {
+    return;
+  }
+
+  profiler_->profilingStack_->pop();
+  MOZ_ASSERT(spBefore_ == profiler_->stackPointer());
+}
+
+}  // namespace js
+
+#endif  // vm_GeckoProfiler_inl_h