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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "common_helper.h"
#include "jni.h"
#include "jvmti.h"
#include "jvmti_helper.h"
#include "scoped_local_ref.h"
#include "test_env.h"
namespace art {
namespace common_breakpoint {
struct BreakpointData {
jclass test_klass;
jmethodID breakpoint_method;
bool in_callback;
bool allow_recursive;
};
extern "C" void breakpointCB(jvmtiEnv* jvmti,
JNIEnv* jnienv,
jthread thread,
jmethodID method,
jlocation location) {
BreakpointData* data = nullptr;
if (JvmtiErrorToException(jnienv, jvmti,
jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) {
return;
}
if (data->in_callback && !data->allow_recursive) {
return;
}
data->in_callback = true;
jobject method_arg = GetJavaMethod(jvmti, jnienv, method);
jnienv->CallStaticVoidMethod(data->test_klass,
data->breakpoint_method,
thread,
method_arg,
static_cast<jlong>(location));
jnienv->DeleteLocalRef(method_arg);
data->in_callback = false;
}
extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Breakpoint_getLineNumberTableNative(
JNIEnv* env,
jclass k ATTRIBUTE_UNUSED,
jobject target) {
jmethodID method = env->FromReflectedMethod(target);
if (env->ExceptionCheck()) {
return nullptr;
}
jint nlines;
jvmtiLineNumberEntry* lines = nullptr;
if (JvmtiErrorToException(env, jvmti_env,
jvmti_env->GetLineNumberTable(method, &nlines, &lines))) {
return nullptr;
}
jintArray lines_array = env->NewIntArray(nlines);
if (env->ExceptionCheck()) {
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines));
return nullptr;
}
jlongArray locs_array = env->NewLongArray(nlines);
if (env->ExceptionCheck()) {
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines));
return nullptr;
}
ScopedLocalRef<jclass> object_class(env, env->FindClass("java/lang/Object"));
if (env->ExceptionCheck()) {
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines));
return nullptr;
}
jobjectArray ret = env->NewObjectArray(2, object_class.get(), nullptr);
if (env->ExceptionCheck()) {
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines));
return nullptr;
}
jint* temp_lines = env->GetIntArrayElements(lines_array, /*isCopy*/nullptr);
jlong* temp_locs = env->GetLongArrayElements(locs_array, /*isCopy*/nullptr);
for (jint i = 0; i < nlines; i++) {
temp_lines[i] = lines[i].line_number;
temp_locs[i] = lines[i].start_location;
}
env->ReleaseIntArrayElements(lines_array, temp_lines, 0);
env->ReleaseLongArrayElements(locs_array, temp_locs, 0);
env->SetObjectArrayElement(ret, 0, locs_array);
env->SetObjectArrayElement(ret, 1, lines_array);
jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines));
return ret;
}
extern "C" JNIEXPORT jlong JNICALL Java_art_Breakpoint_getStartLocation(JNIEnv* env,
jclass k ATTRIBUTE_UNUSED,
jobject target) {
jmethodID method = env->FromReflectedMethod(target);
if (env->ExceptionCheck()) {
return 0;
}
jlong start = 0;
jlong end;
JvmtiErrorToException(env, jvmti_env, jvmti_env->GetMethodLocation(method, &start, &end));
return start;
}
extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_clearBreakpoint(JNIEnv* env,
jclass k ATTRIBUTE_UNUSED,
jobject target,
jlocation location) {
jmethodID method = env->FromReflectedMethod(target);
if (env->ExceptionCheck()) {
return;
}
JvmtiErrorToException(env, jvmti_env, jvmti_env->ClearBreakpoint(method, location));
}
extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_setBreakpoint(JNIEnv* env,
jclass k ATTRIBUTE_UNUSED,
jobject target,
jlocation location) {
jmethodID method = env->FromReflectedMethod(target);
if (env->ExceptionCheck()) {
return;
}
JvmtiErrorToException(env, jvmti_env, jvmti_env->SetBreakpoint(method, location));
}
extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_startBreakpointWatch(
JNIEnv* env,
jclass k ATTRIBUTE_UNUSED,
jclass method_klass,
jobject method,
jboolean allow_recursive,
jthread thr) {
BreakpointData* data = nullptr;
if (JvmtiErrorToException(env,
jvmti_env,
jvmti_env->Allocate(sizeof(BreakpointData),
reinterpret_cast<unsigned char**>(&data)))) {
return;
}
memset(data, 0, sizeof(BreakpointData));
data->test_klass = reinterpret_cast<jclass>(env->NewGlobalRef(method_klass));
data->breakpoint_method = env->FromReflectedMethod(method);
data->in_callback = false;
data->allow_recursive = allow_recursive;
void* old_data = nullptr;
if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetEnvironmentLocalStorage(&old_data))) {
return;
} else if (old_data != nullptr) {
ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
env->ThrowNew(rt_exception.get(), "Environment already has local storage set!");
return;
}
if (JvmtiErrorToException(env, jvmti_env, jvmti_env->SetEnvironmentLocalStorage(data))) {
return;
}
current_callbacks.Breakpoint = breakpointCB;
if (JvmtiErrorToException(env,
jvmti_env,
jvmti_env->SetEventCallbacks(¤t_callbacks,
sizeof(current_callbacks)))) {
return;
}
if (JvmtiErrorToException(env,
jvmti_env,
jvmti_env->SetEventNotificationMode(JVMTI_ENABLE,
JVMTI_EVENT_BREAKPOINT,
thr))) {
return;
}
}
extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_stopBreakpointWatch(
JNIEnv* env,
jclass k ATTRIBUTE_UNUSED,
jthread thr) {
if (JvmtiErrorToException(env, jvmti_env,
jvmti_env->SetEventNotificationMode(JVMTI_DISABLE,
JVMTI_EVENT_BREAKPOINT,
thr))) {
return;
}
}
} // namespace common_breakpoint
} // namespace art
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