Add m-esr52 at 52.6.0

1 files changed, 235 insertions, 0 deletions

diff --git a/js/src/devtools/Instruments.cpp b/js/src/devtools/Instruments.cpp
new file mode 100644
index 000000000..7a69cac07
--- /dev/null
+++ b/js/src/devtools/Instruments.cpp
@@ -0,0 +1,235 @@
+/* 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/. */
+
+#include "Instruments.h"
+#include "mozilla/Attributes.h"
+
+#ifdef __APPLE__
+
+#include <dlfcn.h>
+#include <CoreFoundation/CoreFoundation.h>
+#include <unistd.h>
+
+// There are now 2 paths to the DTPerformanceSession framework. We try to load
+// the one contained in /Applications/Xcode.app first, falling back to the one
+// contained in /Library/Developer/4.0/Instruments.
+#define DTPerformanceLibraryPath "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/DTPerformanceSession.framework/Versions/Current/DTPerformanceSession"
+#define OldDTPerformanceLibraryPath "/Library/Developer/4.0/Instruments/Frameworks/DTPerformanceSession.framework/Versions/Current/DTPerformanceSession"
+
+extern "C" {
+
+typedef CFTypeRef DTPerformanceSessionRef;
+
+#define DTPerformanceSession_TimeProfiler               "com.apple.instruments.dtps.timeprofiler"
+// DTPerformanceSession_Option_SamplingInterval is measured in microseconds
+#define DTPerformanceSession_Option_SamplingInterval    "com.apple.instruments.dtps.option.samplinginterval"
+
+typedef void (*dtps_errorcallback_t)(CFStringRef, CFErrorRef);
+typedef DTPerformanceSessionRef (*DTPerformanceSessionCreateFunction)(CFStringRef, CFStringRef, CFDictionaryRef, CFErrorRef*);
+typedef bool (*DTPerformanceSessionAddInstrumentFunction)(DTPerformanceSessionRef, CFStringRef, CFDictionaryRef, dtps_errorcallback_t, CFErrorRef*);
+typedef bool (*DTPerformanceSessionIsRecordingFunction)(DTPerformanceSessionRef);
+typedef bool (*DTPerformanceSessionStartFunction)(DTPerformanceSessionRef, CFArrayRef, CFErrorRef*);
+typedef bool (*DTPerformanceSessionStopFunction)(DTPerformanceSessionRef, CFArrayRef, CFErrorRef*);
+typedef bool (*DTPerformanceSessionSaveFunction)(DTPerformanceSessionRef, CFStringRef, CFErrorRef*);
+
+} // extern "C"
+
+namespace Instruments {
+
+static const int kSamplingInterval = 20; // microseconds
+
+template<typename T>
+class AutoReleased
+{
+public:
+  MOZ_IMPLICIT AutoReleased(T aTypeRef) : mTypeRef(aTypeRef)
+  {
+  }
+  ~AutoReleased()
+  {
+    if (mTypeRef) {
+      CFRelease(mTypeRef);
+    }
+  }
+
+  operator T()
+  {
+    return mTypeRef;
+  }
+
+private:
+  T mTypeRef;
+};
+
+#define DTPERFORMANCE_SYMBOLS \
+  SYMBOL(DTPerformanceSessionCreate) \
+  SYMBOL(DTPerformanceSessionAddInstrument) \
+  SYMBOL(DTPerformanceSessionIsRecording) \
+  SYMBOL(DTPerformanceSessionStart) \
+  SYMBOL(DTPerformanceSessionStop) \
+  SYMBOL(DTPerformanceSessionSave)
+
+#define SYMBOL(_sym) \
+  _sym##Function _sym = nullptr;
+
+DTPERFORMANCE_SYMBOLS
+
+#undef SYMBOL
+
+void*
+LoadDTPerformanceLibraries(bool dontLoad)
+{
+  int flags = RTLD_LAZY | RTLD_LOCAL | RTLD_NODELETE;
+  if (dontLoad) {
+    flags |= RTLD_NOLOAD;
+  }
+
+  void* DTPerformanceLibrary = dlopen(DTPerformanceLibraryPath, flags);
+  if (!DTPerformanceLibrary) {
+    DTPerformanceLibrary = dlopen(OldDTPerformanceLibraryPath, flags);
+  }
+  return DTPerformanceLibrary;
+}
+
+bool
+LoadDTPerformanceLibrary()
+{
+  void* DTPerformanceLibrary = LoadDTPerformanceLibraries(true);
+  if (!DTPerformanceLibrary) {
+    DTPerformanceLibrary = LoadDTPerformanceLibraries(false);
+    if (!DTPerformanceLibrary) {
+      return false;
+    }
+  }
+
+#define SYMBOL(_sym) \
+  _sym = reinterpret_cast<_sym##Function>(dlsym(DTPerformanceLibrary, #_sym)); \
+  if (!_sym) { \
+    dlclose(DTPerformanceLibrary); \
+    DTPerformanceLibrary = nullptr; \
+    return false; \
+  }
+
+  DTPERFORMANCE_SYMBOLS
+
+#undef SYMBOL
+
+  dlclose(DTPerformanceLibrary);
+
+  return true;
+}
+
+static DTPerformanceSessionRef gSession;
+
+bool
+Error(CFErrorRef error)
+{
+  if (gSession) {
+    CFErrorRef unused = nullptr;
+    DTPerformanceSessionStop(gSession, nullptr, &unused);
+    CFRelease(gSession);
+    gSession = nullptr;
+  }
+#ifdef DEBUG
+  AutoReleased<CFDataRef> data =
+    CFStringCreateExternalRepresentation(nullptr,
+                                         CFErrorCopyDescription(error),
+                                         kCFStringEncodingUTF8, '?');
+  if (data != nullptr) {
+    printf("%.*s\n\n", (int)CFDataGetLength(data), CFDataGetBytePtr(data));
+  }
+#endif
+  return false;
+}
+
+bool
+Start(pid_t pid)
+{
+  if (gSession) {
+    return false;
+  }
+
+  if (!LoadDTPerformanceLibrary()) {
+    return false;
+  }
+
+  AutoReleased<CFStringRef> process =
+    CFStringCreateWithFormat(kCFAllocatorDefault, nullptr, CFSTR("%d"), pid);
+  if (!process) {
+    return false;
+  }
+  CFErrorRef error = nullptr;
+  gSession = DTPerformanceSessionCreate(nullptr, process, nullptr, &error);
+  if (!gSession) {
+    return Error(error);
+  }
+
+  AutoReleased<CFNumberRef> interval =
+    CFNumberCreate(0, kCFNumberIntType, &kSamplingInterval);
+  if (!interval) {
+    return false;
+  }
+  CFStringRef keys[1] = { CFSTR(DTPerformanceSession_Option_SamplingInterval) };
+  CFNumberRef values[1] = { interval };
+  AutoReleased<CFDictionaryRef> options =
+    CFDictionaryCreate(kCFAllocatorDefault, (const void**)keys,
+                       (const void**)values, 1, &kCFTypeDictionaryKeyCallBacks,
+                       &kCFTypeDictionaryValueCallBacks);
+  if (!options) {
+    return false;
+  }
+
+  if (!DTPerformanceSessionAddInstrument(gSession,
+                                         CFSTR(DTPerformanceSession_TimeProfiler),
+                                         options, nullptr, &error)) {
+    return Error(error);
+  }
+
+  return Resume();
+}
+
+void
+Pause()
+{
+  if (gSession && DTPerformanceSessionIsRecording(gSession)) {
+    CFErrorRef error = nullptr;
+    if (!DTPerformanceSessionStop(gSession, nullptr, &error)) {
+      Error(error);
+    }
+  }
+}
+
+bool
+Resume()
+{
+  if (!gSession) {
+    return false;
+  }
+
+  CFErrorRef error = nullptr;
+  return DTPerformanceSessionStart(gSession, nullptr, &error) ||
+         Error(error);
+}
+
+void
+Stop(const char* profileName)
+{
+  Pause();
+
+  CFErrorRef error = nullptr;
+  AutoReleased<CFStringRef> name =
+    CFStringCreateWithFormat(kCFAllocatorDefault, nullptr, CFSTR("%s%s"),
+                             "/tmp/", profileName ? profileName : "mozilla");
+  if (!DTPerformanceSessionSave(gSession, name, &error)) {
+    Error(error);
+    return;
+  }
+
+  CFRelease(gSession);
+  gSession = nullptr;
+}
+
+} // namespace Instruments
+
+#endif /* __APPLE__ */