Adding support for reporting addresses of JIT compiled code to OProfile

src/oprofile-agent.cc

Index: src/oprofile-agent.cc
diff --git a/src/oprofile-agent.cc b/src/oprofile-agent.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e9f7d3e2faa63cdb28052186c59e0c4af03753b3
--- /dev/null
+++ b/src/oprofile-agent.cc
@@ -0,0 +1,111 @@
+// Copyright 2006-2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "v8.h"
+
+#include "oprofile-agent.h"
+
+namespace v8 { namespace internal {
+
+#ifdef ENABLE_OPROFILE_AGENT
+op_agent_t OProfileAgent::handle_ = NULL;
+#endif
+
+
+bool OProfileAgent::Initialize() {
+#ifdef ENABLE_OPROFILE_AGENT
+  if (FLAG_oprofile) {
+    if (handle_ != NULL) return false;
+
+    // Disable code moving by GC.
+    FLAG_always_compact = false;
+    FLAG_never_compact = true;
+
+    handle_ = op_open_agent();
+    return (handle_ != NULL);
+  } else {
+    return true;
+  }
+#else
+  return true;
+#endif
+}
+
+
+void OProfileAgent::TearDown() {
+#ifdef ENABLE_OPROFILE_AGENT
+  if (handle_ != NULL) {
+    op_close_agent(handle_);
+  }
+#endif
+}
+
+
+void OProfileAgent::CreateNativeCodeRegion(const char* name,
+    const void* ptr, unsigned int size) {
+#ifdef ENABLE_OPROFILE_AGENT
+  if (handle_ == NULL) return;
+  op_write_native_code(handle_, name, (uint64_t)ptr, ptr, size);
+#endif
+}
+
+
+void OProfileAgent::CreateNativeCodeRegion(String* name,
+    const void* ptr, unsigned int size) {
+#ifdef ENABLE_OPROFILE_AGENT
+  if (handle_ != NULL) {
+    const char* func_name;
+    SmartPointer<char> str =
+        name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
+    func_name = name->length() > 0 ? *str : "<anonymous>";
+    CreateNativeCodeRegion(func_name, ptr, size);
+  }
+#endif
+}
+
+
+void OProfileAgent::CreateNativeCodeRegion(String* name, String* source,
+    int line_num, const void* ptr, unsigned int size) {
+#ifdef ENABLE_OPROFILE_AGENT
+  if (handle_ != NULL) {
+    Vector<char> buf = Vector<char>::New(OProfileAgent::kFormattingBufSize);
+    const char* func_name;
+    SmartPointer<char> str =
+        name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
+    func_name = name->length() > 0 ? *str : "<anonymous>";
+    SmartPointer<char> source_str =
+        source->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
+    if (v8::internal::OS::SNPrintF(buf, "%s %s:%d",
+                                   func_name, *source_str, line_num) != -1) {
+      CreateNativeCodeRegion(buf.start(), ptr, size);
+    } else {
+      CreateNativeCodeRegion("<script/func name too long>", ptr, size);
+    }
+  }
+#endif
+}
+} }