dmtracedump -o <filename> > trace.txt

VERSION: 3
Threads (13):
 1 main
 2 GC
 3 Signal Catcher
 4 JDWP
...
Trace (threadID action usecs class.method signature):
 4 xit         0 ..dalvik/system/VMDebug.startMethodTracingDdms (IIZI)V
 4 xit         0 .android/os/Debug.startMethodTracingDdms (IIZI)V
 4 xit         0 android/ddm/DdmHandleProfiling.handleMPSS (Lorg/apache/harmony/dalvik/ddmc/Chunk;)Lorg/apache/harmony/dalvik/ddmc/Chunk;
...

grep "^ 1 " trace.txt