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/*
* Copyright (c) 2013, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include <string.h>
#include <stdio.h>
#include "jvmti.h"
#define CLASS_NAME "Lcompiler/jsr292/cr8026328/Test8026328;"
#define METHOD_NAME "main"
static jvmtiEnv *jvmti = NULL;
void JNICALL
classprepare(jvmtiEnv* jvmti_env,
JNIEnv* jni_env,
jthread thread,
jclass klass) {
char* buf;
(*jvmti)->GetClassSignature(jvmti,
klass,
&buf,
NULL);
if (strcmp(CLASS_NAME, buf) == 0) {
jint nMethods;
jmethodID* methods;
int i;
(*jvmti)->GetClassMethods(jvmti,
klass,
&nMethods,
&methods);
for (i = 0; i < nMethods; i++) {
char* name;
(*jvmti)->GetMethodName(jvmti,
methods[i],
&name,
NULL,
NULL);
if (strcmp(METHOD_NAME, name) == 0) {
printf("Setting breakpoint\n");
fflush(stdout);
(*jvmti)->SetBreakpoint(jvmti, methods[i], 0);
}
}
}
}
void JNICALL
breakpoint(jvmtiEnv* jvmti_env,
JNIEnv* jni_env,
jthread thread,
jmethodID method,
jlocation location) {
jclass declaring_class;
char* name;
char* cname;
(*jvmti)->GetMethodName(jvmti,
method,
&name,
NULL,
NULL);
(*jvmti)->GetMethodDeclaringClass(jvmti,
method,
&declaring_class);
(*jvmti)->GetClassSignature(jvmti,
declaring_class,
&cname,
NULL);
printf("Hit breakpoint at %s::%s:%d\n", cname, name, (int) location);
fflush(stdout);
}
JNIEXPORT jint JNICALL
Agent_OnLoad(JavaVM* vm,
char* options,
void* reserved) {
jvmtiCapabilities capa;
jvmtiEventCallbacks cbs;
(*vm)->GetEnv(vm, (void**)&jvmti, JVMTI_VERSION_1_0);
memset(&capa, 0, sizeof(capa));
capa.can_generate_breakpoint_events = 1;
capa.can_generate_single_step_events = 1;
(*jvmti)->AddCapabilities(jvmti, &capa);
memset(&cbs, 0, sizeof(cbs));
cbs.ClassPrepare = classprepare;
cbs.Breakpoint = breakpoint;
(*jvmti)->SetEventCallbacks(jvmti, &cbs, sizeof(cbs));
(*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, JVMTI_EVENT_CLASS_PREPARE, NULL);
(*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, JVMTI_EVENT_BREAKPOINT, NULL);
printf("Loaded agent\n");
fflush(stdout);
return 0;
}
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