143 lines
5.4 KiB
C++
143 lines
5.4 KiB
C++
/*
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* Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "jvmti.h"
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#include "jvmti_common.h"
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#include "../get_stack_trace.h"
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extern "C" {
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static jvmtiEnv *jvmti = NULL;
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static jvmtiCapabilities caps;
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static jvmtiEventCallbacks callbacks;
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static jmethodID mid;
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static frame_info expected_platform_frames[] = {
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{"Lgetstacktr05$TestThread;", "chain4", "()V"},
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{"Lgetstacktr05$TestThread;", "chain3", "()V"},
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{"Lgetstacktr05$TestThread;", "chain2", "()V"},
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{"Lgetstacktr05$TestThread;", "chain1", "()V"},
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{"Lgetstacktr05$TestThread;", "run", "()V"},
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{"Ljava/lang/Thread;", "runWith", "(Ljava/lang/Object;Ljava/lang/Runnable;)V"},
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{"Ljava/lang/Thread;", "run", "()V"},
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};
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static frame_info expected_virtual_frames[] = {
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{"Lgetstacktr05$TestThread;", "chain4", "()V"},
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{"Lgetstacktr05$TestThread;", "chain3", "()V"},
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{"Lgetstacktr05$TestThread;", "chain2", "()V"},
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{"Lgetstacktr05$TestThread;", "chain1", "()V"},
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{"Lgetstacktr05$TestThread;", "run", "()V"},
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{"Ljava/lang/VirtualThread;", "runWith", "(Ljava/lang/Object;Ljava/lang/Runnable;)V"},
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{"Ljava/lang/VirtualThread;", "run", "(Ljava/lang/Runnable;)V"},
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{"Ljava/lang/VirtualThread$VThreadContinuation$1;", "run", "()V"},
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{"Ljdk/internal/vm/Continuation;", "enter0", "()V"},
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{"Ljdk/internal/vm/Continuation;", "enter", "(Ljdk/internal/vm/Continuation;Z)V"},
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};
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void JNICALL
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Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *jni, jthread thread, jmethodID method, jlocation location) {
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jint frame_count = 0;
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if (mid != method) {
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jni->FatalError("ERROR: didn't know where we got called from");
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}
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LOG(">>> (bp) checking frame count ...\n");
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check_jvmti_status(jni, jvmti_env->GetFrameCount(thread, &frame_count), "GetFrameCount failed.");
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int expected_number_of_stack_frames = jni->IsVirtualThread(thread)
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? ((int) (sizeof(expected_virtual_frames) / sizeof(frame_info)))
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: ((int) (sizeof(expected_platform_frames) / sizeof(frame_info)));
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if (frame_count != expected_number_of_stack_frames + 1) {
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LOG("(bp) wrong frame count, expected: %d, actual: %d\n", expected_number_of_stack_frames + 1, frame_count);
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jni->FatalError("Wrong number of frames.");
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}
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LOG(">>> (bp) frame_count: %d\n", frame_count);
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set_event_notification_mode(jvmti_env, JVMTI_ENABLE, JVMTI_EVENT_SINGLE_STEP, thread);
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LOG(">>> stepping ...\n");
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}
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void JNICALL
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SingleStep(jvmtiEnv *jvmti_env, JNIEnv *jni, jthread thread, jmethodID method, jlocation location) {
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set_event_notification_mode(jvmti, jni, JVMTI_DISABLE, JVMTI_EVENT_SINGLE_STEP, thread);
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frame_info *expected_frames = jni->IsVirtualThread(thread)
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? expected_virtual_frames
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: expected_platform_frames;
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int expected_number_of_stack_frames = jni->IsVirtualThread(thread)
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? ((int) (sizeof(expected_virtual_frames) / sizeof(frame_info)))
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: ((int) (sizeof(expected_platform_frames) / sizeof(frame_info)));
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if (!compare_stack_trace(jvmti_env, jni, thread, expected_frames, expected_number_of_stack_frames)) {
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jni->ThrowNew(jni->FindClass("java/lang/RuntimeException"), "Stacktrace differs from expected.");
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}
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}
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JNIEXPORT jint JNICALL
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Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
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jvmtiError err;
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jint res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
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if (res != JNI_OK || jvmti == NULL) {
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LOG("Wrong result of a valid call to GetEnv!\n");
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return JNI_ERR;
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}
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jvmtiCapabilities caps;
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memset(&caps, 0, sizeof(caps));
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caps.can_generate_breakpoint_events = 1;
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caps.can_generate_single_step_events = 1;
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err = jvmti->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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LOG("(AddCapabilities) unexpected error: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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callbacks.Breakpoint = &Breakpoint;
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callbacks.SingleStep = &SingleStep;
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err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
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if (err != JVMTI_ERROR_NONE) {
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LOG("(SetEventCallbacks) unexpected error: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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return JNI_OK;
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}
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JNIEXPORT void JNICALL
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Java_getstacktr05_getReady(JNIEnv *jni, jclass cls, jclass clazz) {
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mid = jni->GetMethodID(clazz, "checkPoint", "()V");
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if (mid == NULL) {
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jni->FatalError("Cannot find Method ID for method checkPoint\n");
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}
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check_jvmti_status(jni, jvmti->SetBreakpoint(mid, 0), "SetBreakpoint failed.");
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set_event_notification_mode(jvmti, jni, JVMTI_ENABLE,JVMTI_EVENT_BREAKPOINT, NULL);
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}
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}
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