608 

   609 /*

   610  * com.sun.dtrace.jsdt support

   611  */

   612 

   613 #define JVM_TRACING_DTRACE_VERSION 1

   614 

   615 /*

   616  * Structure to pass one probe description to JVM.

   617  *

   618  * The VM will overwrite the definition of the referenced method with

   619  * code that will fire the probe.

   620  */

   621 typedef struct {

   622     jmethodID method;

   623     jstring   function;

   624     jstring   name;

   625     void*     reserved[4];     // for future use

   626 } JVM_DTraceProbe;

   627 

   628 /**

   629  * Encapsulates the stability ratings for a DTrace provider field

   630  */

   631 typedef struct {

   632     jint nameStability;

   633     jint dataStability;

   634     jint dependencyClass;

   635 } JVM_DTraceInterfaceAttributes;

   636 

   637 /*

   638  * Structure to pass one provider description to JVM

   639  */

   640 typedef struct {

   641     jstring                       name;

   642     JVM_DTraceProbe*              probes;

   643     jint                          probe_count;

   644     JVM_DTraceInterfaceAttributes providerAttributes;

   645     JVM_DTraceInterfaceAttributes moduleAttributes;

   646     JVM_DTraceInterfaceAttributes functionAttributes;

   647     JVM_DTraceInterfaceAttributes nameAttributes;

   648     JVM_DTraceInterfaceAttributes argsAttributes;

   649     void*                         reserved[4]; // for future use

   650 } JVM_DTraceProvider;

   651 

   652 /*

   653  * Get the version number the JVM was built with

   654  */

   655 JNIEXPORT jint JNICALL

   656 JVM_DTraceGetVersion(JNIEnv* env);

   657 

   658 /*

   659  * Register new probe with given signature, return global handle

   660  *

   661  * The version passed in is the version that the library code was

   662  * built with.

   663  */

   664 JNIEXPORT jlong JNICALL

   665 JVM_DTraceActivate(JNIEnv* env, jint version, jstring module_name,

   666   jint providers_count, JVM_DTraceProvider* providers);

   667 

   668 /*

   669  * Check JSDT probe

   670  */

   671 JNIEXPORT jboolean JNICALL

   672 JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method);

   673 

   674 /*

   675  * Destroy custom DOF

   676  */

   677 JNIEXPORT void JNICALL

   678 JVM_DTraceDispose(JNIEnv* env, jlong handle);

   679 

   680 /*

   681  * Check to see if DTrace is supported by OS

   682  */

   683 JNIEXPORT jboolean JNICALL

   684 JVM_DTraceIsSupported(JNIEnv* env);