blob: 2e09c9f2fe8db6f83b1185e5c28fcfbd01dd1e43 [file] [log] [blame]
/*
* 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 <sstream>
#include "nativehelper/jni_macros.h"
#include "base/file_utils.h"
#include "base/histogram-inl.h"
#include "base/time_utils.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 "handle_scope-inl.h"
#include "hprof/hprof.h"
#include "jni/java_vm_ext.h"
#include "jni/jni_internal.h"
#include "mirror/array-alloc-inl.h"
#include "mirror/array-inl.h"
#include "mirror/class.h"
#include "mirror/object_array-inl.h"
#include "native_util.h"
#include "nativehelper/scoped_local_ref.h"
#include "nativehelper/scoped_utf_chars.h"
#include "scoped_fast_native_object_access-inl.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 static_cast<jint>(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::StartDDMS(bufferSize,
flags,
samplingEnabled ? Trace::TraceMode::kSampling : Trace::TraceMode::kMethodTracing,
intervalUs);
}
static void VMDebug_startMethodTracingFd(JNIEnv* env,
jclass,
jstring javaTraceFilename ATTRIBUTE_UNUSED,
jint javaFd,
jint bufferSize,
jint flags,
jboolean samplingEnabled,
jint intervalUs,
jboolean streamingOutput) {
int originalFd = javaFd;
if (originalFd < 0) {
ScopedObjectAccess soa(env);
soa.Self()->ThrowNewExceptionF("Ljava/lang/RuntimeException;",
"Trace fd is invalid: %d",
originalFd);
return;
}
int fd = DupCloexec(originalFd);
if (fd < 0) {
ScopedObjectAccess soa(env);
soa.Self()->ThrowNewExceptionF("Ljava/lang/RuntimeException;",
"dup(%d) failed: %s",
originalFd,
strerror(errno));
return;
}
// Ignore the traceFilename.
Trace::TraceOutputMode outputMode = streamingOutput
? Trace::TraceOutputMode::kStreaming
: Trace::TraceOutputMode::kFile;
Trace::Start(fd,
bufferSize,
flags,
outputMode,
samplingEnabled ? Trace::TraceMode::kSampling : Trace::TraceMode::kMethodTracing,
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() == nullptr) {
return;
}
Trace::Start(traceFilename.c_str(),
bufferSize,
flags,
Trace::TraceOutputMode::kFile,
samplingEnabled ? Trace::TraceMode::kSampling : Trace::TraceMode::kMethodTracing,
intervalUs);
}
static jint VMDebug_getMethodTracingMode(JNIEnv*, jclass) {
return Trace::GetMethodTracingMode();
}
static void VMDebug_stopMethodTracing(JNIEnv*, jclass) {
Trace::Stop();
}
static jboolean VMDebug_isDebuggerConnected(JNIEnv*, jclass) {
// This function will be replaced by the debugger when it's connected. See
// external/oj-libjdwp/src/share/vmDebug.c for implementation when debugger is connected.
return false;
}
static jboolean VMDebug_isDebuggingEnabled(JNIEnv* env, jclass) {
ScopedObjectAccess soa(env);
return Runtime::Current()->GetRuntimeCallbacks()->IsDebuggerConfigured();
}
static jlong VMDebug_lastDebuggerActivity(JNIEnv*, jclass) {
// This function will be replaced by the debugger when it's connected. See
// external/oj-libjdwp/src/share/vmDebug.c for implementation when debugger is connected.
return -1;
}
static void VMDebug_printLoadedClasses(JNIEnv* env, jclass, jint flags) {
class DumpClassVisitor : public ClassVisitor {
public:
explicit DumpClassVisitor(int dump_flags) : flags_(dump_flags) {}
bool operator()(ObjPtr<mirror::Class> klass) override REQUIRES_SHARED(Locks::mutator_lock_) {
klass->DumpClass(LOG_STREAM(ERROR), flags_);
return true;
}
private:
const int flags_;
};
DumpClassVisitor visitor(flags);
ScopedFastNativeObjectAccess soa(env);
return Runtime::Current()->GetClassLinker()->VisitClasses(&visitor);
}
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, jint javaFd) {
// Only one of these may be null.
if (javaFilename == nullptr && javaFd < 0) {
ScopedObjectAccess soa(env);
ThrowNullPointerException("fileName == null && fd == null");
return;
}
std::string filename;
if (javaFilename != nullptr) {
ScopedUtfChars chars(env, javaFilename);
if (env->ExceptionCheck()) {
return;
}
filename = chars.c_str();
} else {
filename = "[fd]";
}
int fd = javaFd;
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_STREAM(INFO));
soa.Vm()->DumpReferenceTables(LOG_STREAM(INFO));
LOG(INFO) << "---";
}
static jlong VMDebug_countInstancesOfClass(JNIEnv* env,
jclass,
jclass javaClass,
jboolean countAssignable) {
ScopedObjectAccess soa(env);
gc::Heap* const heap = Runtime::Current()->GetHeap();
// Caller's responsibility to do GC if desired.
ObjPtr<mirror::Class> c = soa.Decode<mirror::Class>(javaClass);
if (c == nullptr) {
return 0;
}
VariableSizedHandleScope hs(soa.Self());
std::vector<Handle<mirror::Class>> classes {hs.NewHandle(c)};
uint64_t count = 0;
heap->CountInstances(classes, countAssignable, &count);
return count;
}
static jlongArray VMDebug_countInstancesOfClasses(JNIEnv* env,
jclass,
jobjectArray javaClasses,
jboolean countAssignable) {
ScopedObjectAccess soa(env);
gc::Heap* const heap = Runtime::Current()->GetHeap();
// Caller's responsibility to do GC if desired.
ObjPtr<mirror::ObjectArray<mirror::Class>> decoded_classes =
soa.Decode<mirror::ObjectArray<mirror::Class>>(javaClasses);
if (decoded_classes == nullptr) {
return nullptr;
}
VariableSizedHandleScope hs(soa.Self());
std::vector<Handle<mirror::Class>> classes;
for (size_t i = 0, count = decoded_classes->GetLength(); i < count; ++i) {
classes.push_back(hs.NewHandle(decoded_classes->Get(i)));
}
std::vector<uint64_t> counts(classes.size(), 0u);
// Heap::CountInstances can handle null and will put 0 for these classes.
heap->CountInstances(classes, countAssignable, &counts[0]);
ObjPtr<mirror::LongArray> long_counts = mirror::LongArray::Alloc(soa.Self(), counts.size());
if (long_counts == nullptr) {
soa.Self()->AssertPendingOOMException();
return nullptr;
}
for (size_t i = 0; i < counts.size(); ++i) {
long_counts->Set(i, counts[i]);
}
return soa.AddLocalReference<jlongArray>(long_counts);
}
// The runtime stat names for VMDebug.getRuntimeStat().
enum class VMDebugRuntimeStatId {
kArtGcGcCount = 0,
kArtGcGcTime,
kArtGcBytesAllocated,
kArtGcBytesFreed,
kArtGcBlockingGcCount,
kArtGcBlockingGcTime,
kArtGcGcCountRateHistogram,
kArtGcBlockingGcCountRateHistogram,
kArtGcObjectsAllocated,
kArtGcTotalTimeWaitingForGc,
kArtGcPreOomeGcCount,
kNumRuntimeStats,
};
static jstring VMDebug_getRuntimeStatInternal(JNIEnv* env, jclass, jint statId) {
gc::Heap* heap = Runtime::Current()->GetHeap();
switch (static_cast<VMDebugRuntimeStatId>(statId)) {
case VMDebugRuntimeStatId::kArtGcGcCount: {
std::string output = std::to_string(heap->GetGcCount());
return env->NewStringUTF(output.c_str());
}
case VMDebugRuntimeStatId::kArtGcGcTime: {
std::string output = std::to_string(NsToMs(heap->GetGcTime()));
return env->NewStringUTF(output.c_str());
}
case VMDebugRuntimeStatId::kArtGcBytesAllocated: {
std::string output = std::to_string(heap->GetBytesAllocatedEver());
return env->NewStringUTF(output.c_str());
}
case VMDebugRuntimeStatId::kArtGcBytesFreed: {
std::string output = std::to_string(heap->GetBytesFreedEver());
return env->NewStringUTF(output.c_str());
}
case VMDebugRuntimeStatId::kArtGcBlockingGcCount: {
std::string output = std::to_string(heap->GetBlockingGcCount());
return env->NewStringUTF(output.c_str());
}
case VMDebugRuntimeStatId::kArtGcBlockingGcTime: {
std::string output = std::to_string(NsToMs(heap->GetBlockingGcTime()));
return env->NewStringUTF(output.c_str());
}
case VMDebugRuntimeStatId::kArtGcGcCountRateHistogram: {
std::ostringstream output;
heap->DumpGcCountRateHistogram(output);
return env->NewStringUTF(output.str().c_str());
}
case VMDebugRuntimeStatId::kArtGcBlockingGcCountRateHistogram: {
std::ostringstream output;
heap->DumpBlockingGcCountRateHistogram(output);
return env->NewStringUTF(output.str().c_str());
}
case VMDebugRuntimeStatId::kArtGcObjectsAllocated: {
std::string output = std::to_string(heap->GetObjectsAllocated());
return env->NewStringUTF(output.c_str());
}
case VMDebugRuntimeStatId::kArtGcTotalTimeWaitingForGc: {
std::string output = std::to_string(heap->GetTotalTimeWaitingForGC());
return env->NewStringUTF(output.c_str());
}
case VMDebugRuntimeStatId::kArtGcPreOomeGcCount: {
std::string output = std::to_string(heap->GetPreOomeGcCount());
return env->NewStringUTF(output.c_str());
}
default:
return nullptr;
}
}
static bool SetRuntimeStatValue(JNIEnv* env,
jobjectArray result,
VMDebugRuntimeStatId id,
const std::string& value) {
ScopedLocalRef<jstring> jvalue(env, env->NewStringUTF(value.c_str()));
if (jvalue.get() == nullptr) {
return false;
}
env->SetObjectArrayElement(result, static_cast<jint>(id), jvalue.get());
return true;
}
static jobjectArray VMDebug_getRuntimeStatsInternal(JNIEnv* env, jclass) {
jobjectArray result = env->NewObjectArray(
static_cast<jint>(VMDebugRuntimeStatId::kNumRuntimeStats),
WellKnownClasses::java_lang_String,
nullptr);
if (result == nullptr) {
return nullptr;
}
gc::Heap* heap = Runtime::Current()->GetHeap();
if (!SetRuntimeStatValue(env, result, VMDebugRuntimeStatId::kArtGcGcCount,
std::to_string(heap->GetGcCount()))) {
return nullptr;
}
if (!SetRuntimeStatValue(env, result, VMDebugRuntimeStatId::kArtGcGcTime,
std::to_string(NsToMs(heap->GetGcTime())))) {
return nullptr;
}
if (!SetRuntimeStatValue(env, result, VMDebugRuntimeStatId::kArtGcBytesAllocated,
std::to_string(heap->GetBytesAllocatedEver()))) {
return nullptr;
}
if (!SetRuntimeStatValue(env, result, VMDebugRuntimeStatId::kArtGcBytesFreed,
std::to_string(heap->GetBytesFreedEver()))) {
return nullptr;
}
if (!SetRuntimeStatValue(env, result, VMDebugRuntimeStatId::kArtGcBlockingGcCount,
std::to_string(heap->GetBlockingGcCount()))) {
return nullptr;
}
if (!SetRuntimeStatValue(env, result, VMDebugRuntimeStatId::kArtGcBlockingGcTime,
std::to_string(NsToMs(heap->GetBlockingGcTime())))) {
return nullptr;
}
{
std::ostringstream output;
heap->DumpGcCountRateHistogram(output);
if (!SetRuntimeStatValue(env, result, VMDebugRuntimeStatId::kArtGcGcCountRateHistogram,
output.str())) {
return nullptr;
}
}
{
std::ostringstream output;
heap->DumpBlockingGcCountRateHistogram(output);
if (!SetRuntimeStatValue(env, result, VMDebugRuntimeStatId::kArtGcBlockingGcCountRateHistogram,
output.str())) {
return nullptr;
}
}
return result;
}
static void VMDebug_nativeAttachAgent(JNIEnv* env, jclass, jstring agent, jobject classloader) {
if (agent == nullptr) {
ScopedObjectAccess soa(env);
ThrowNullPointerException("agent is null");
return;
}
if (!Dbg::IsJdwpAllowed()) {
ScopedObjectAccess soa(env);
ThrowSecurityException("Can't attach agent, process is not debuggable.");
return;
}
std::string filename;
{
ScopedUtfChars chars(env, agent);
if (env->ExceptionCheck()) {
return;
}
filename = chars.c_str();
}
Runtime::Current()->AttachAgent(env, filename, classloader);
}
static void VMDebug_allowHiddenApiReflectionFrom(JNIEnv* env, jclass, jclass j_caller) {
Runtime* runtime = Runtime::Current();
ScopedObjectAccess soa(env);
if (!runtime->IsJavaDebuggable()) {
ThrowSecurityException("Can't exempt class, process is not debuggable.");
return;
}
StackHandleScope<1> hs(soa.Self());
Handle<mirror::Class> h_caller(hs.NewHandle(soa.Decode<mirror::Class>(j_caller)));
if (h_caller.IsNull()) {
ThrowNullPointerException("argument is null");
return;
}
h_caller->SetSkipHiddenApiChecks();
}
static void VMDebug_setAllocTrackerStackDepth(JNIEnv* env, jclass, jint stack_depth) {
Runtime* runtime = Runtime::Current();
if (stack_depth < 0 ||
static_cast<size_t>(stack_depth) > gc::AllocRecordObjectMap::kMaxSupportedStackDepth) {
ScopedObjectAccess soa(env);
soa.Self()->ThrowNewExceptionF("Ljava/lang/RuntimeException;",
"Stack depth is invalid: %d",
stack_depth);
} else {
runtime->GetHeap()->SetAllocTrackerStackDepth(static_cast<size_t>(stack_depth));
}
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(VMDebug, countInstancesOfClass, "(Ljava/lang/Class;Z)J"),
NATIVE_METHOD(VMDebug, countInstancesOfClasses, "([Ljava/lang/Class;Z)[J"),
NATIVE_METHOD(VMDebug, dumpHprofData, "(Ljava/lang/String;I)V"),
NATIVE_METHOD(VMDebug, dumpHprofDataDdms, "()V"),
NATIVE_METHOD(VMDebug, dumpReferenceTables, "()V"),
NATIVE_METHOD(VMDebug, getAllocCount, "(I)I"),
FAST_NATIVE_METHOD(VMDebug, getLoadedClassCount, "()I"),
NATIVE_METHOD(VMDebug, getVmFeatureList, "()[Ljava/lang/String;"),
FAST_NATIVE_METHOD(VMDebug, isDebuggerConnected, "()Z"),
FAST_NATIVE_METHOD(VMDebug, isDebuggingEnabled, "()Z"),
NATIVE_METHOD(VMDebug, getMethodTracingMode, "()I"),
FAST_NATIVE_METHOD(VMDebug, lastDebuggerActivity, "()J"),
FAST_NATIVE_METHOD(VMDebug, printLoadedClasses, "(I)V"),
NATIVE_METHOD(VMDebug, resetAllocCount, "(I)V"),
NATIVE_METHOD(VMDebug, startAllocCounting, "()V"),
NATIVE_METHOD(VMDebug, startMethodTracingDdmsImpl, "(IIZI)V"),
NATIVE_METHOD(VMDebug, startMethodTracingFd, "(Ljava/lang/String;IIIZIZ)V"),
NATIVE_METHOD(VMDebug, startMethodTracingFilename, "(Ljava/lang/String;IIZI)V"),
NATIVE_METHOD(VMDebug, stopAllocCounting, "()V"),
NATIVE_METHOD(VMDebug, stopMethodTracing, "()V"),
FAST_NATIVE_METHOD(VMDebug, threadCpuTimeNanos, "()J"),
NATIVE_METHOD(VMDebug, getRuntimeStatInternal, "(I)Ljava/lang/String;"),
NATIVE_METHOD(VMDebug, getRuntimeStatsInternal, "()[Ljava/lang/String;"),
NATIVE_METHOD(VMDebug, nativeAttachAgent, "(Ljava/lang/String;Ljava/lang/ClassLoader;)V"),
NATIVE_METHOD(VMDebug, allowHiddenApiReflectionFrom, "(Ljava/lang/Class;)V"),
NATIVE_METHOD(VMDebug, setAllocTrackerStackDepth, "(I)V"),
};
void register_dalvik_system_VMDebug(JNIEnv* env) {
REGISTER_NATIVE_METHODS("dalvik/system/VMDebug");
}
} // namespace art