diff options
| -rw-r--r-- | core/java/android/os/Debug.java | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/core/java/android/os/Debug.java b/core/java/android/os/Debug.java index 399f11b0f2a7..c731a808263a 100644 --- a/core/java/android/os/Debug.java +++ b/core/java/android/os/Debug.java @@ -982,6 +982,43 @@ public final class Debug /** + * Wait until a debugger attaches. As soon as a debugger attaches, + * suspend all Java threads and send VM_START (a.k.a VM_INIT) + * packet. + * + * @hide + */ + public static void suspendAllAndSendVmStart() { + if (!VMDebug.isDebuggingEnabled()) { + return; + } + + // if DDMS is listening, inform them of our plight + System.out.println("Sending WAIT chunk"); + byte[] data = new byte[] { 0 }; // 0 == "waiting for debugger" + Chunk waitChunk = new Chunk(ChunkHandler.type("WAIT"), data, 0, 1); + DdmServer.sendChunk(waitChunk); + + // We must wait until a debugger is connected (debug socket is + // open and at least one non-DDM JDWP packedt has been received. + // This guarantees that oj-libjdwp has been attached and that + // ART's default implementation of suspendAllAndSendVmStart has + // been replaced with an implementation that will suspendAll and + // send VM_START. + System.out.println("Waiting for debugger first packet"); + while (!isDebuggerConnected()) { + try { + Thread.sleep(100); + } catch (InterruptedException ie) { + } + } + + System.out.println("Debug.suspendAllAndSentVmStart"); + VMDebug.suspendAllAndSendVmStart(); + System.out.println("Debug.suspendAllAndSendVmStart, resumed"); + } + + /** * Wait until a debugger attaches. As soon as the debugger attaches, * this returns, so you will need to place a breakpoint after the * waitForDebugger() call if you want to start tracing immediately. |