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, 2 insertions, 2 deletions

diff --git a/vm/Profile.h b/vm/Profile.h
index d5dbea280..7cac150e2 100644
--- a/vm/Profile.h
+++ b/vm/Profile.h
@@ -39,7 +39,6 @@ void dvmProfilingShutdown(void);
 /*
  * Method trace state.  This is currently global.  In theory we could make
  * most of this per-thread.
- *
  */
 typedef struct MethodTraceState {
     /* these are set during VM init */
@@ -50,6 +49,7 @@ typedef struct MethodTraceState {
     pthread_mutex_t startStopLock;
     pthread_cond_t  threadExitCond;
     FILE*   traceFile;
+    bool    directToDdms;
     int     bufferSize;
     int     flags;
 
@@ -97,7 +97,7 @@ typedef struct AllocProfState {
  * Start/stop method tracing.
  */
 void dvmMethodTraceStart(const char* traceFileName, int traceFd, int bufferSize,
-        int flags);
+        int flags, bool directToDdms);
 bool dvmIsMethodTraceActive(void);
 void dvmMethodTraceStop(void);