1 /*
2 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include <string.h>
25 #include <stdio.h>
26
27 #include "jvmti.h"
28
29 #define CLASS_NAME "Lcompiler/jsr292/cr8026328/Test8026328;"
30 #define METHOD_NAME "main"
31
32 static jvmtiEnv *jvmti = NULL;
33
34
35 void JNICALL
classprepare(jvmtiEnv * jvmti_env,JNIEnv * jni_env,jthread thread,jclass klass)36 classprepare(jvmtiEnv* jvmti_env,
37 JNIEnv* jni_env,
38 jthread thread,
39 jclass klass) {
40
41 char* buf;
42 (*jvmti)->GetClassSignature(jvmti,
43 klass,
44 &buf,
45 NULL);
46 if (strcmp(CLASS_NAME, buf) == 0) {
47 jint nMethods;
48 jmethodID* methods;
49 int i;
50 (*jvmti)->GetClassMethods(jvmti,
51 klass,
52 &nMethods,
53 &methods);
54 for (i = 0; i < nMethods; i++) {
55 char* name;
56 (*jvmti)->GetMethodName(jvmti,
57 methods[i],
58 &name,
59 NULL,
60 NULL);
61 if (strcmp(METHOD_NAME, name) == 0) {
62 printf("Setting breakpoint\n");
63 fflush(stdout);
64 (*jvmti)->SetBreakpoint(jvmti, methods[i], 0);
65 }
66 }
67 }
68 }
69
70
71 void JNICALL
breakpoint(jvmtiEnv * jvmti_env,JNIEnv * jni_env,jthread thread,jmethodID method,jlocation location)72 breakpoint(jvmtiEnv* jvmti_env,
73 JNIEnv* jni_env,
74 jthread thread,
75 jmethodID method,
76 jlocation location) {
77
78 jclass declaring_class;
79 char* name;
80 char* cname;
81 (*jvmti)->GetMethodName(jvmti,
82 method,
83 &name,
84 NULL,
85 NULL);
86 (*jvmti)->GetMethodDeclaringClass(jvmti,
87 method,
88 &declaring_class);
89 (*jvmti)->GetClassSignature(jvmti,
90 declaring_class,
91 &cname,
92 NULL);
93 printf("Hit breakpoint at %s::%s:%d\n", cname, name, (int) location);
94 fflush(stdout);
95 }
96
97
98 JNIEXPORT jint JNICALL
Agent_OnLoad(JavaVM * vm,char * options,void * reserved)99 Agent_OnLoad(JavaVM* vm,
100 char* options,
101 void* reserved) {
102
103 jvmtiCapabilities capa;
104 jvmtiEventCallbacks cbs = {0};
105
106 (*vm)->GetEnv(vm, (void**)&jvmti, JVMTI_VERSION_1_0);
107
108 memset(&capa, 0, sizeof(capa));
109 capa.can_generate_breakpoint_events = 1;
110 capa.can_generate_single_step_events = 1;
111 (*jvmti)->AddCapabilities(jvmti, &capa);
112
113 cbs.ClassPrepare = classprepare;
114 cbs.Breakpoint = breakpoint;
115 (*jvmti)->SetEventCallbacks(jvmti, &cbs, sizeof(cbs));
116 (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, JVMTI_EVENT_CLASS_PREPARE, NULL);
117 (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, JVMTI_EVENT_BREAKPOINT, NULL);
118 printf("Loaded agent\n");
119 fflush(stdout);
120
121 return 0;
122 }
123