test/common/stack_inspect.cc - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2015 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 "jni.h"

 #include <android-base/logging.h>

 #include "arch/context.h"
 #include "base/mutex.h"
 #include "dex/dex_file-inl.h"
 #include "jni/jni_internal.h"
 #include "mirror/class-inl.h"
 #include "nth_caller_visitor.h"
 #include "oat/oat_file.h"
 #include "oat/oat_quick_method_header.h"
 #include "runtime.h"
 #include "scoped_thread_state_change-inl.h"
 #include "stack.h"
 #include "thread-current-inl.h"

 namespace art {

 static bool asserts_enabled = true;

 // public static native void disableStackFrameAsserts();
 // Note: to globally disable asserts in unsupported configurations.

 extern "C" JNIEXPORT void JNICALL Java_Main_disableStackFrameAsserts([[maybe_unused]] JNIEnv* env,
                                                                      [[maybe_unused]] jclass cls) {
   asserts_enabled = false;
 }

 static jboolean IsInterpreted(JNIEnv* env, jclass, size_t level) {
   ScopedObjectAccess soa(env);
   NthCallerVisitor caller(soa.Self(), level, false);
   caller.WalkStack();
   CHECK(caller.caller != nullptr);
   bool is_shadow_frame = (caller.GetCurrentShadowFrame() != nullptr);
   bool is_nterp_frame = (caller.GetCurrentQuickFrame() != nullptr) &&
       (caller.GetCurrentOatQuickMethodHeader()->IsNterpMethodHeader());
   return (is_shadow_frame || is_nterp_frame) ? JNI_TRUE : JNI_FALSE;
 }

 // public static native boolean isInterpreted();

 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpreted(JNIEnv* env, jclass klass) {
   return IsInterpreted(env, klass, 1);
 }

 // public static native boolean isInterpreted(int depth);

 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpretedAt(JNIEnv* env,
                                                                 jclass klass,
                                                                 jint depth) {
   return IsInterpreted(env, klass, depth);
 }


 // public static native boolean isInterpretedFunction(String smali);

 static bool IsMethodInterpreted(Thread* self,
                                 const ArtMethod* goal,
                                 const bool require_deoptable,
                                 /* out */ bool* method_is_interpreted)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   *method_is_interpreted = true;
   bool method_found = false;
   bool prev_was_runtime = true;
   StackVisitor::WalkStack(
       [&](const art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) {
         if (goal == stack_visitor->GetMethod()) {
           *method_is_interpreted =
               (require_deoptable && prev_was_runtime) || stack_visitor->IsShadowFrame();
           method_found = true;
           return false;
         }
         prev_was_runtime = stack_visitor->GetMethod()->IsRuntimeMethod();
         return true;
       },
       self,
       /* context= */ nullptr,
       art::StackVisitor::StackWalkKind::kIncludeInlinedFrames);
   return method_found;
 }

 // TODO Remove 'require_deoptimizable' option once we have deoptimization through runtime frames.
 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpretedFunction(
     JNIEnv* env, [[maybe_unused]] jclass klass, jobject method, jboolean require_deoptimizable) {
   // Return false if this seems to not be an ART runtime.
   if (Runtime::Current() == nullptr) {
     return JNI_FALSE;
   }
   if (method == nullptr) {
     env->ThrowNew(env->FindClass("java/lang/NullPointerException"), "method is null!");
     return JNI_FALSE;
   }
   jmethodID id = env->FromReflectedMethod(method);
   if (id == nullptr) {
     env->ThrowNew(env->FindClass("java/lang/Error"), "Unable to interpret method argument!");
     return JNI_FALSE;
   }
   {
     ScopedObjectAccess soa(env);
     ArtMethod* goal = jni::DecodeArtMethod(id);
     bool is_interpreted;
     if (!IsMethodInterpreted(soa.Self(), goal, require_deoptimizable, &is_interpreted)) {
       env->ThrowNew(env->FindClass("java/lang/Error"), "Unable to find given method in stack!");
       return JNI_FALSE;
     }
     bool enters_interpreter = Runtime::Current()->GetClassLinker()->IsQuickToInterpreterBridge(
         goal->GetEntryPointFromQuickCompiledCode());
     return (is_interpreted || enters_interpreter);
   }
 }

 // public static native void assertIsInterpreted();

 extern "C" JNIEXPORT void JNICALL Java_Main_assertIsInterpreted(JNIEnv* env, jclass klass) {
   if (asserts_enabled) {
     CHECK(Java_Main_isInterpreted(env, klass));
   }
 }

 static jboolean IsManaged(JNIEnv* env, jclass, size_t level) {
   ScopedObjectAccess soa(env);
   NthCallerVisitor caller(soa.Self(), level, false);
   caller.WalkStack();
   CHECK(caller.caller != nullptr);
   return caller.GetCurrentShadowFrame() != nullptr ? JNI_FALSE : JNI_TRUE;
 }

 // public static native boolean isManaged();

 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isManaged(JNIEnv* env, jclass cls) {
   return IsManaged(env, cls, 1);
 }

 // public static native void assertIsManaged();

 extern "C" JNIEXPORT void JNICALL Java_Main_assertIsManaged(JNIEnv* env, jclass cls) {
   if (asserts_enabled) {
     CHECK(Java_Main_isManaged(env, cls));
   }
 }

 // public static native boolean isCallerInterpreted();

 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isCallerInterpreted(JNIEnv* env, jclass klass) {
   return IsInterpreted(env, klass, 2);
 }

 // public static native void assertCallerIsInterpreted();

 extern "C" JNIEXPORT void JNICALL Java_Main_assertCallerIsInterpreted(JNIEnv* env, jclass klass) {
   if (asserts_enabled) {
     CHECK(Java_Main_isCallerInterpreted(env, klass));
   }
 }

 // public static native boolean isCallerManaged();

 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isCallerManaged(JNIEnv* env, jclass cls) {
   return IsManaged(env, cls, 2);
 }

 // public static native void assertCallerIsManaged();

 extern "C" JNIEXPORT void JNICALL Java_Main_assertCallerIsManaged(JNIEnv* env, jclass cls) {
   if (asserts_enabled) {
     CHECK(Java_Main_isCallerManaged(env, cls));
   }
 }

 extern "C" JNIEXPORT jobject JNICALL Java_Main_getThisOfCaller(
     JNIEnv* env, [[maybe_unused]] jclass cls) {
   ScopedObjectAccess soa(env);
   std::unique_ptr<art::Context> context(art::Context::Create());
   jobject result = nullptr;
   StackVisitor::WalkStack(
       [&](const art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) {
         // Discard stubs and Main.getThisOfCaller and methods without vreg info.
         if (stack_visitor->GetMethod() == nullptr ||
             stack_visitor->GetMethod()->IsNative() ||
             (stack_visitor->GetCurrentShadowFrame() == nullptr &&
              !Runtime::Current()->IsAsyncDeoptimizeable(stack_visitor->GetOuterMethod(),
                                                         stack_visitor->GetCurrentQuickFramePc()))) {
           return true;
         }
         result = soa.AddLocalReference<jobject>(stack_visitor->GetThisObject());
         return false;
       },
       soa.Self(),
       context.get(),
       art::StackVisitor::StackWalkKind::kIncludeInlinedFrames);
   return result;
 }

 }  // namespace art
	/*
	* Copyright (C) 2015 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 "jni.h"

	#include <android-base/logging.h>

	#include "arch/context.h"
	#include "base/mutex.h"
	#include "dex/dex_file-inl.h"
	#include "jni/jni_internal.h"
	#include "mirror/class-inl.h"
	#include "nth_caller_visitor.h"
	#include "oat/oat_file.h"
	#include "oat/oat_quick_method_header.h"
	#include "runtime.h"
	#include "scoped_thread_state_change-inl.h"
	#include "stack.h"
	#include "thread-current-inl.h"

	namespace art {

	static bool asserts_enabled = true;

	// public static native void disableStackFrameAsserts();
	// Note: to globally disable asserts in unsupported configurations.

	extern "C" JNIEXPORT void JNICALL Java_Main_disableStackFrameAsserts([[maybe_unused]] JNIEnv* env,
	[[maybe_unused]] jclass cls) {
	asserts_enabled = false;
	}

	static jboolean IsInterpreted(JNIEnv* env, jclass, size_t level) {
	ScopedObjectAccess soa(env);
	NthCallerVisitor caller(soa.Self(), level, false);
	caller.WalkStack();
	CHECK(caller.caller != nullptr);
	bool is_shadow_frame = (caller.GetCurrentShadowFrame() != nullptr);
	bool is_nterp_frame = (caller.GetCurrentQuickFrame() != nullptr) &&
	(caller.GetCurrentOatQuickMethodHeader()->IsNterpMethodHeader());
	return (is_shadow_frame \|\| is_nterp_frame) ? JNI_TRUE : JNI_FALSE;
	}

	// public static native boolean isInterpreted();

	extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpreted(JNIEnv* env, jclass klass) {
	return IsInterpreted(env, klass, 1);
	}

	// public static native boolean isInterpreted(int depth);

	extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpretedAt(JNIEnv* env,
	jclass klass,
	jint depth) {
	return IsInterpreted(env, klass, depth);
	}


	// public static native boolean isInterpretedFunction(String smali);

	static bool IsMethodInterpreted(Thread* self,
	const ArtMethod* goal,
	const bool require_deoptable,
	/* out / bool method_is_interpreted)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	*method_is_interpreted = true;
	bool method_found = false;
	bool prev_was_runtime = true;
	StackVisitor::WalkStack(
	[&](const art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) {
	if (goal == stack_visitor->GetMethod()) {
	*method_is_interpreted =
	(require_deoptable && prev_was_runtime) \|\| stack_visitor->IsShadowFrame();
	method_found = true;
	return false;
	}
	prev_was_runtime = stack_visitor->GetMethod()->IsRuntimeMethod();
	return true;
	},
	self,
	/* context= */ nullptr,
	art::StackVisitor::StackWalkKind::kIncludeInlinedFrames);
	return method_found;
	}

	// TODO Remove 'require_deoptimizable' option once we have deoptimization through runtime frames.
	extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpretedFunction(
	JNIEnv* env, [[maybe_unused]] jclass klass, jobject method, jboolean require_deoptimizable) {
	// Return false if this seems to not be an ART runtime.
	if (Runtime::Current() == nullptr) {
	return JNI_FALSE;
	}
	if (method == nullptr) {
	env->ThrowNew(env->FindClass("java/lang/NullPointerException"), "method is null!");
	return JNI_FALSE;
	}
	jmethodID id = env->FromReflectedMethod(method);
	if (id == nullptr) {
	env->ThrowNew(env->FindClass("java/lang/Error"), "Unable to interpret method argument!");
	return JNI_FALSE;
	}
	{
	ScopedObjectAccess soa(env);
	ArtMethod* goal = jni::DecodeArtMethod(id);
	bool is_interpreted;
	if (!IsMethodInterpreted(soa.Self(), goal, require_deoptimizable, &is_interpreted)) {
	env->ThrowNew(env->FindClass("java/lang/Error"), "Unable to find given method in stack!");
	return JNI_FALSE;
	}
	bool enters_interpreter = Runtime::Current()->GetClassLinker()->IsQuickToInterpreterBridge(
	goal->GetEntryPointFromQuickCompiledCode());
	return (is_interpreted \|\| enters_interpreter);
	}
	}

	// public static native void assertIsInterpreted();

	extern "C" JNIEXPORT void JNICALL Java_Main_assertIsInterpreted(JNIEnv* env, jclass klass) {
	if (asserts_enabled) {
	CHECK(Java_Main_isInterpreted(env, klass));
	}
	}

	static jboolean IsManaged(JNIEnv* env, jclass, size_t level) {
	ScopedObjectAccess soa(env);
	NthCallerVisitor caller(soa.Self(), level, false);
	caller.WalkStack();
	CHECK(caller.caller != nullptr);
	return caller.GetCurrentShadowFrame() != nullptr ? JNI_FALSE : JNI_TRUE;
	}

	// public static native boolean isManaged();

	extern "C" JNIEXPORT jboolean JNICALL Java_Main_isManaged(JNIEnv* env, jclass cls) {
	return IsManaged(env, cls, 1);
	}

	// public static native void assertIsManaged();

	extern "C" JNIEXPORT void JNICALL Java_Main_assertIsManaged(JNIEnv* env, jclass cls) {
	if (asserts_enabled) {
	CHECK(Java_Main_isManaged(env, cls));
	}
	}

	// public static native boolean isCallerInterpreted();

	extern "C" JNIEXPORT jboolean JNICALL Java_Main_isCallerInterpreted(JNIEnv* env, jclass klass) {
	return IsInterpreted(env, klass, 2);
	}

	// public static native void assertCallerIsInterpreted();

	extern "C" JNIEXPORT void JNICALL Java_Main_assertCallerIsInterpreted(JNIEnv* env, jclass klass) {
	if (asserts_enabled) {
	CHECK(Java_Main_isCallerInterpreted(env, klass));
	}
	}

	// public static native boolean isCallerManaged();

	extern "C" JNIEXPORT jboolean JNICALL Java_Main_isCallerManaged(JNIEnv* env, jclass cls) {
	return IsManaged(env, cls, 2);
	}

	// public static native void assertCallerIsManaged();

	extern "C" JNIEXPORT void JNICALL Java_Main_assertCallerIsManaged(JNIEnv* env, jclass cls) {
	if (asserts_enabled) {
	CHECK(Java_Main_isCallerManaged(env, cls));
	}
	}

	extern "C" JNIEXPORT jobject JNICALL Java_Main_getThisOfCaller(
	JNIEnv* env, [[maybe_unused]] jclass cls) {
	ScopedObjectAccess soa(env);
	std::unique_ptr<art::Context> context(art::Context::Create());
	jobject result = nullptr;
	StackVisitor::WalkStack(
	[&](const art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) {
	// Discard stubs and Main.getThisOfCaller and methods without vreg info.
	if (stack_visitor->GetMethod() == nullptr \|\|
	stack_visitor->GetMethod()->IsNative() \|\|
	(stack_visitor->GetCurrentShadowFrame() == nullptr &&
	!Runtime::Current()->IsAsyncDeoptimizeable(stack_visitor->GetOuterMethod(),
	stack_visitor->GetCurrentQuickFramePc()))) {
	return true;
	}
	result = soa.AddLocalReference<jobject>(stack_visitor->GetThisObject());
	return false;
	},
	soa.Self(),
	context.get(),
	art::StackVisitor::StackWalkKind::kIncludeInlinedFrames);
	return result;
	}

	} // namespace art