Add streaming method profiling support.

The goal is to allow DDMS to start/stop method profiling in apps that
don't have permission to write to /sdcard.  Instead of writing the
profiling data to disk and then pulling it off, we just blast the whole
thing straight from memory.

This includes:

 - New method tracing start call (startMethodTracingDdms).
 - Rearrangement of existing VMDebug method tracing calls for sanity.
 - Addition of "vector" chunk send function, with corresponding
   update to the JDWP transport function.
 - Reshuffled the method trace start interlock, which seemed racy.
 - Post new method-trace-profiling-streaming feature to DDMS.

Also:

 - Added an internal exception-throw function that allows a printf
   format string, so we can put useful detail into exception messages.

For bug 2160407.

1 files changed, 14 insertions, 0 deletions

diff --git a/vm/Exception.h b/vm/Exception.h
index 404434548..f53c0bfcb 100644
--- a/vm/Exception.h
+++ b/vm/Exception.h
@@ -35,6 +35,20 @@ INLINE void dvmThrowException(const char* exceptionDescriptor,
 }
 
 /*
+ * Like dvmThrowChainedException, but takes printf-style args for the message.
+ */
+void dvmThrowExceptionFmtV(const char* exceptionDescriptor, const char* fmt,
+    va_list args);
+INLINE void dvmThrowExceptionFmt(const char* exceptionDescriptor,
+    const char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    dvmThrowExceptionFmtV(exceptionDescriptor, fmt, args);
+    va_end(args);
+}
+
+/*
  * Throw an exception in the current thread, by class object.
  */
 void dvmThrowChainedExceptionByClass(ClassObject* exceptionClass,