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/*
* Copyright (C) 2008 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 "dalvik_system_VMDebug.h"
#include <string.h>
#include <unistd.h>
#include "class_linker.h"
#include "common_throws.h"
#include "debugger.h"
#include "gc/space/bump_pointer_space.h"
#include "gc/space/dlmalloc_space.h"
#include "gc/space/large_object_space.h"
#include "gc/space/space-inl.h"
#include "gc/space/zygote_space.h"
#include "hprof/hprof.h"
#include "jni_internal.h"
#include "mirror/class.h"
#include "ScopedLocalRef.h"
#include "ScopedUtfChars.h"
#include "scoped_fast_native_object_access.h"
#include "trace.h"
#include "well_known_classes.h"
namespace art {
static jobjectArray VMDebug_getVmFeatureList(JNIEnv* env, jclass) {
static const char* features[] = {
"method-trace-profiling",
"method-trace-profiling-streaming",
"method-sample-profiling",
"hprof-heap-dump",
"hprof-heap-dump-streaming",
};
jobjectArray result = env->NewObjectArray(arraysize(features),
WellKnownClasses::java_lang_String,
nullptr);
if (result != nullptr) {
for (size_t i = 0; i < arraysize(features); ++i) {
ScopedLocalRef<jstring> jfeature(env, env->NewStringUTF(features[i]));
if (jfeature.get() == nullptr) {
return nullptr;
}
env->SetObjectArrayElement(result, i, jfeature.get());
}
}
return result;
}
static void VMDebug_startAllocCounting(JNIEnv*, jclass) {
Runtime::Current()->SetStatsEnabled(true);
}
static void VMDebug_stopAllocCounting(JNIEnv*, jclass) {
Runtime::Current()->SetStatsEnabled(false);
}
static jint VMDebug_getAllocCount(JNIEnv*, jclass, jint kind) {
return Runtime::Current()->GetStat(kind);
}
static void VMDebug_resetAllocCount(JNIEnv*, jclass, jint kinds) {
Runtime::Current()->ResetStats(kinds);
}
static void VMDebug_startMethodTracingDdmsImpl(JNIEnv*, jclass, jint bufferSize, jint flags,
jboolean samplingEnabled, jint intervalUs) {
Trace::Start("[DDMS]", -1, bufferSize, flags, true, samplingEnabled, intervalUs);
}
static void VMDebug_startMethodTracingFd(JNIEnv* env, jclass, jstring javaTraceFilename,
jobject javaFd, jint bufferSize, jint flags,
jboolean samplingEnabled, jint intervalUs) {
int originalFd = jniGetFDFromFileDescriptor(env, javaFd);
if (originalFd < 0) {
return;
}
int fd = dup(originalFd);
if (fd < 0) {
ScopedObjectAccess soa(env);
ThrowLocation throw_location = soa.Self()->GetCurrentLocationForThrow();
soa.Self()->ThrowNewExceptionF(throw_location, "Ljava/lang/RuntimeException;",
"dup(%d) failed: %s", originalFd, strerror(errno));
return;
}
ScopedUtfChars traceFilename(env, javaTraceFilename);
if (traceFilename.c_str() == NULL) {
return;
}
Trace::Start(traceFilename.c_str(), fd, bufferSize, flags, false, samplingEnabled, intervalUs);
}
static void VMDebug_startMethodTracingFilename(JNIEnv* env, jclass, jstring javaTraceFilename,
jint bufferSize, jint flags,
jboolean samplingEnabled, jint intervalUs) {
ScopedUtfChars traceFilename(env, javaTraceFilename);
if (traceFilename.c_str() == NULL) {
return;
}
Trace::Start(traceFilename.c_str(), -1, bufferSize, flags, false, samplingEnabled, intervalUs);
}
static jint VMDebug_getMethodTracingMode(JNIEnv*, jclass) {
return Trace::GetMethodTracingMode();
}
static void VMDebug_stopMethodTracing(JNIEnv*, jclass) {
Trace::Stop();
}
static void VMDebug_startEmulatorTracing(JNIEnv*, jclass) {
UNIMPLEMENTED(WARNING);
// dvmEmulatorTraceStart();
}
static void VMDebug_stopEmulatorTracing(JNIEnv*, jclass) {
UNIMPLEMENTED(WARNING);
// dvmEmulatorTraceStop();
}
static jboolean VMDebug_isDebuggerConnected(JNIEnv*, jclass) {
return Dbg::IsDebuggerActive();
}
static jboolean VMDebug_isDebuggingEnabled(JNIEnv*, jclass) {
return Dbg::IsJdwpConfigured();
}
static jlong VMDebug_lastDebuggerActivity(JNIEnv*, jclass) {
return Dbg::LastDebuggerActivity();
}
static void ThrowUnsupportedOperationException(JNIEnv* env) {
ScopedObjectAccess soa(env);
ThrowLocation throw_location = soa.Self()->GetCurrentLocationForThrow();
soa.Self()->ThrowNewException(throw_location, "Ljava/lang/UnsupportedOperationException;", NULL);
}
static void VMDebug_startInstructionCounting(JNIEnv* env, jclass) {
ThrowUnsupportedOperationException(env);
}
static void VMDebug_stopInstructionCounting(JNIEnv* env, jclass) {
ThrowUnsupportedOperationException(env);
}
static void VMDebug_getInstructionCount(JNIEnv* env, jclass, jintArray /*javaCounts*/) {
ThrowUnsupportedOperationException(env);
}
static void VMDebug_resetInstructionCount(JNIEnv* env, jclass) {
ThrowUnsupportedOperationException(env);
}
static void VMDebug_printLoadedClasses(JNIEnv* env, jclass, jint flags) {
ScopedFastNativeObjectAccess soa(env);
return Runtime::Current()->GetClassLinker()->DumpAllClasses(flags);
}
static jint VMDebug_getLoadedClassCount(JNIEnv* env, jclass) {
ScopedFastNativeObjectAccess soa(env);
return Runtime::Current()->GetClassLinker()->NumLoadedClasses();
}
/*
* Returns the thread-specific CPU-time clock value for the current thread,
* or -1 if the feature isn't supported.
*/
static jlong VMDebug_threadCpuTimeNanos(JNIEnv*, jclass) {
return ThreadCpuNanoTime();
}
/*
* static void dumpHprofData(String fileName, FileDescriptor fd)
*
* Cause "hprof" data to be dumped. We can throw an IOException if an
* error occurs during file handling.
*/
static void VMDebug_dumpHprofData(JNIEnv* env, jclass, jstring javaFilename, jobject javaFd) {
// Only one of these may be NULL.
if (javaFilename == NULL && javaFd == NULL) {
ScopedObjectAccess soa(env);
ThrowNullPointerException(NULL, "fileName == null && fd == null");
return;
}
std::string filename;
if (javaFilename != NULL) {
ScopedUtfChars chars(env, javaFilename);
if (env->ExceptionCheck()) {
return;
}
filename = chars.c_str();
} else {
filename = "[fd]";
}
int fd = -1;
if (javaFd != NULL) {
fd = jniGetFDFromFileDescriptor(env, javaFd);
if (fd < 0) {
ScopedObjectAccess soa(env);
ThrowRuntimeException("Invalid file descriptor");
return;
}
}
hprof::DumpHeap(filename.c_str(), fd, false);
}
static void VMDebug_dumpHprofDataDdms(JNIEnv*, jclass) {
hprof::DumpHeap("[DDMS]", -1, true);
}
static void VMDebug_dumpReferenceTables(JNIEnv* env, jclass) {
ScopedObjectAccess soa(env);
LOG(INFO) << "--- reference table dump ---";
soa.Env()->DumpReferenceTables(LOG(INFO));
soa.Vm()->DumpReferenceTables(LOG(INFO));
LOG(INFO) << "---";
}
static void VMDebug_crash(JNIEnv*, jclass) {
LOG(FATAL) << "Crashing runtime on request";
}
static void VMDebug_infopoint(JNIEnv*, jclass, jint id) {
LOG(INFO) << "VMDebug infopoint " << id << " hit";
}
static jlong VMDebug_countInstancesOfClass(JNIEnv* env, jclass, jclass javaClass,
jboolean countAssignable) {
ScopedObjectAccess soa(env);
gc::Heap* heap = Runtime::Current()->GetHeap();
// We only want reachable instances, so do a GC. Heap::VisitObjects visits all of the heap
// objects in the all spaces and the allocation stack.
heap->CollectGarbage(false);
mirror::Class* c = soa.Decode<mirror::Class*>(javaClass);
if (c == nullptr) {
return 0;
}
std::vector<mirror::Class*> classes;
classes.push_back(c);
uint64_t count = 0;
heap->CountInstances(classes, countAssignable, &count);
return count;
}
// We export the VM internal per-heap-space size/alloc/free metrics
// for the zygote space, alloc space (application heap), and the large
// object space for dumpsys meminfo. The other memory region data such
// as PSS, private/shared dirty/shared data are available via
// /proc/<pid>/smaps.
static void VMDebug_getHeapSpaceStats(JNIEnv* env, jclass, jlongArray data) {
jlong* arr = reinterpret_cast<jlong*>(env->GetPrimitiveArrayCritical(data, 0));
if (arr == nullptr || env->GetArrayLength(data) < 9) {
return;
}
size_t allocSize = 0;
size_t allocUsed = 0;
size_t zygoteSize = 0;
size_t zygoteUsed = 0;
size_t largeObjectsSize = 0;
size_t largeObjectsUsed = 0;
gc::Heap* heap = Runtime::Current()->GetHeap();
for (gc::space::ContinuousSpace* space : heap->GetContinuousSpaces()) {
if (space->IsImageSpace()) {
// Currently don't include the image space.
} else if (space->IsZygoteSpace()) {
gc::space::ZygoteSpace* zygote_space = space->AsZygoteSpace();
zygoteSize += zygote_space->Size();
zygoteUsed += zygote_space->GetBytesAllocated();
} else if (space->IsMallocSpace()) {
// This is a malloc space.
gc::space::MallocSpace* malloc_space = space->AsMallocSpace();
allocSize += malloc_space->GetFootprint();
allocUsed += malloc_space->GetBytesAllocated();
} else if (space->IsBumpPointerSpace()) {
ScopedObjectAccess soa(env);
gc::space::BumpPointerSpace* bump_pointer_space = space->AsBumpPointerSpace();
allocSize += bump_pointer_space->Size();
allocUsed += bump_pointer_space->GetBytesAllocated();
}
}
for (gc::space::DiscontinuousSpace* space : heap->GetDiscontinuousSpaces()) {
if (space->IsLargeObjectSpace()) {
largeObjectsSize += space->AsLargeObjectSpace()->GetBytesAllocated();
largeObjectsUsed += largeObjectsSize;
}
}
size_t allocFree = allocSize - allocUsed;
size_t zygoteFree = zygoteSize - zygoteUsed;
size_t largeObjectsFree = largeObjectsSize - largeObjectsUsed;
int j = 0;
arr[j++] = allocSize;
arr[j++] = allocUsed;
arr[j++] = allocFree;
arr[j++] = zygoteSize;
arr[j++] = zygoteUsed;
arr[j++] = zygoteFree;
arr[j++] = largeObjectsSize;
arr[j++] = largeObjectsUsed;
arr[j++] = largeObjectsFree;
env->ReleasePrimitiveArrayCritical(data, arr, 0);
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(VMDebug, countInstancesOfClass, "(Ljava/lang/Class;Z)J"),
NATIVE_METHOD(VMDebug, crash, "()V"),
NATIVE_METHOD(VMDebug, dumpHprofData, "(Ljava/lang/String;Ljava/io/FileDescriptor;)V"),
NATIVE_METHOD(VMDebug, dumpHprofDataDdms, "()V"),
NATIVE_METHOD(VMDebug, dumpReferenceTables, "()V"),
NATIVE_METHOD(VMDebug, getAllocCount, "(I)I"),
NATIVE_METHOD(VMDebug, getHeapSpaceStats, "([J)V"),
NATIVE_METHOD(VMDebug, getInstructionCount, "([I)V"),
NATIVE_METHOD(VMDebug, getLoadedClassCount, "!()I"),
NATIVE_METHOD(VMDebug, getVmFeatureList, "()[Ljava/lang/String;"),
NATIVE_METHOD(VMDebug, infopoint, "(I)V"),
NATIVE_METHOD(VMDebug, isDebuggerConnected, "!()Z"),
NATIVE_METHOD(VMDebug, isDebuggingEnabled, "!()Z"),
NATIVE_METHOD(VMDebug, getMethodTracingMode, "()I"),
NATIVE_METHOD(VMDebug, lastDebuggerActivity, "!()J"),
NATIVE_METHOD(VMDebug, printLoadedClasses, "!(I)V"),
NATIVE_METHOD(VMDebug, resetAllocCount, "(I)V"),
NATIVE_METHOD(VMDebug, resetInstructionCount, "()V"),
NATIVE_METHOD(VMDebug, startAllocCounting, "()V"),
NATIVE_METHOD(VMDebug, startEmulatorTracing, "()V"),
NATIVE_METHOD(VMDebug, startInstructionCounting, "()V"),
NATIVE_METHOD(VMDebug, startMethodTracingDdmsImpl, "(IIZI)V"),
NATIVE_METHOD(VMDebug, startMethodTracingFd, "(Ljava/lang/String;Ljava/io/FileDescriptor;IIZI)V"),
NATIVE_METHOD(VMDebug, startMethodTracingFilename, "(Ljava/lang/String;IIZI)V"),
NATIVE_METHOD(VMDebug, stopAllocCounting, "()V"),
NATIVE_METHOD(VMDebug, stopEmulatorTracing, "()V"),
NATIVE_METHOD(VMDebug, stopInstructionCounting, "()V"),
NATIVE_METHOD(VMDebug, stopMethodTracing, "()V"),
NATIVE_METHOD(VMDebug, threadCpuTimeNanos, "!()J"),
};
void register_dalvik_system_VMDebug(JNIEnv* env) {
REGISTER_NATIVE_METHODS("dalvik/system/VMDebug");
}
} // namespace art