JDK-8003690 : Example code in JVMTI GetStackTrace documentation is broken
  • Type: Bug
  • Status: Resolved
  • Resolution: Fixed
  • Component: hotspot
  • Sub-Component: svc
  • Priority: P4
  • Submit Date: 2012-11-20
  • Updated Date: 2013-04-30
  • Resolved Date: 2012-11-22
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JDK 8 Other
8Resolved hs25Resolved
Description
In the JVMTI documentation for GetStackTrace there is a code snippet outlining how to use the functionality:

jvmtiFrameInfo frames[5];
jint count;
jvmtiError err;

err = (*jvmti)->GetStackTrace(jvmti, aThread, 0, 5, 
                               &frames, &count);
if (err == JVMTI_ERROR_NONE && count >= 1) {
   char *methodName;
   err = (*jvmti)->GetMethodName(jvmti, frames[0].method, 
                       &methodName, NULL);
   if (err == JVMTI_ERROR_NONE) {
      printf("Executing method: %s", methodName);
   }
}

There are two errors in the code:

1. The 5th argument to GetStackTrace (frames) should not have an ampersand
2. GetMethodName takes 5 parameters, but the example only passes four parameters to it