runtime/openjdkjvmti/ti_method.cc - LeafOS-Project/android_art - Gitiles

 /* Copyright (C) 2016 The Android Open Source Project
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This file implements interfaces from the file jvmti.h. This implementation
  * is licensed under the same terms as the file jvmti.h.  The
  * copyright and license information for the file jvmti.h follows.
  *
  * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 #include "ti_method.h"

 #include "art_jvmti.h"
 #include "art_method-inl.h"
 #include "base/enums.h"
 #include "jni_internal.h"
 #include "modifiers.h"
 #include "scoped_thread_state_change-inl.h"
 #include "thread-inl.h"

 namespace openjdkjvmti {

 jvmtiError MethodUtil::GetArgumentsSize(jvmtiEnv* env ATTRIBUTE_UNUSED,
                                         jmethodID method,
                                         jint* size_ptr) {
   if (method == nullptr) {
     return ERR(INVALID_METHODID);
   }
   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);

   if (art_method->IsNative()) {
     return ERR(NATIVE_METHOD);
   }

   if (size_ptr == nullptr) {
     return ERR(NULL_POINTER);
   }

   art::ScopedObjectAccess soa(art::Thread::Current());
   if (art_method->IsProxyMethod() || art_method->IsAbstract()) {
     // This isn't specified as an error case, so return 0.
     *size_ptr = 0;
     return ERR(NONE);
   }

   DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
   *size_ptr = art_method->GetCodeItem()->ins_size_;

   return ERR(NONE);
 }

 jvmtiError MethodUtil::GetMaxLocals(jvmtiEnv* env ATTRIBUTE_UNUSED,
                                     jmethodID method,
                                     jint* max_ptr) {
   if (method == nullptr) {
     return ERR(INVALID_METHODID);
   }
   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);

   if (art_method->IsNative()) {
     return ERR(NATIVE_METHOD);
   }

   if (max_ptr == nullptr) {
     return ERR(NULL_POINTER);
   }

   art::ScopedObjectAccess soa(art::Thread::Current());
   if (art_method->IsProxyMethod() || art_method->IsAbstract()) {
     // This isn't specified as an error case, so return 0.
     *max_ptr = 0;
     return ERR(NONE);
   }

   DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
   *max_ptr = art_method->GetCodeItem()->registers_size_;

   return ERR(NONE);
 }

 jvmtiError MethodUtil::GetMethodName(jvmtiEnv* env,
                                      jmethodID method,
                                      char** name_ptr,
                                      char** signature_ptr,
                                      char** generic_ptr) {
   art::ScopedObjectAccess soa(art::Thread::Current());
   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
   art_method = art_method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize);

   JvmtiUniquePtr name_copy;
   if (name_ptr != nullptr) {
     const char* method_name = art_method->GetName();
     if (method_name == nullptr) {
       method_name = "<error>";
     }
     unsigned char* tmp;
     jvmtiError ret = CopyString(env, method_name, &tmp);
     if (ret != ERR(NONE)) {
       return ret;
     }
     name_copy = MakeJvmtiUniquePtr(env, tmp);
     *name_ptr = reinterpret_cast<char*>(tmp);
   }

   JvmtiUniquePtr signature_copy;
   if (signature_ptr != nullptr) {
     const art::Signature sig = art_method->GetSignature();
     std::string str = sig.ToString();
     unsigned char* tmp;
     jvmtiError ret = CopyString(env, str.c_str(), &tmp);
     if (ret != ERR(NONE)) {
       return ret;
     }
     signature_copy = MakeJvmtiUniquePtr(env, tmp);
     *signature_ptr = reinterpret_cast<char*>(tmp);
   }

   // TODO: Support generic signature.
   if (generic_ptr != nullptr) {
     *generic_ptr = nullptr;
   }

   // Everything is fine, release the buffers.
   name_copy.release();
   signature_copy.release();

   return ERR(NONE);
 }

 jvmtiError MethodUtil::GetMethodDeclaringClass(jvmtiEnv* env ATTRIBUTE_UNUSED,
                                                jmethodID method,
                                                jclass* declaring_class_ptr) {
   if (declaring_class_ptr == nullptr) {
     return ERR(NULL_POINTER);
   }

   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
   // Note: No GetInterfaceMethodIfProxy, we want to actual class.

   art::ScopedObjectAccess soa(art::Thread::Current());
   art::mirror::Class* klass = art_method->GetDeclaringClass();
   *declaring_class_ptr = soa.AddLocalReference<jclass>(klass);

   return ERR(NONE);
 }

 jvmtiError MethodUtil::GetMethodLocation(jvmtiEnv* env ATTRIBUTE_UNUSED,
                                          jmethodID method,
                                          jlocation* start_location_ptr,
                                          jlocation* end_location_ptr) {
   if (method == nullptr) {
     return ERR(INVALID_METHODID);
   }
   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);

   if (art_method->IsNative()) {
     return ERR(NATIVE_METHOD);
   }

   if (start_location_ptr == nullptr || end_location_ptr == nullptr) {
     return ERR(NULL_POINTER);
   }

   art::ScopedObjectAccess soa(art::Thread::Current());
   if (art_method->IsProxyMethod() || art_method->IsAbstract()) {
     // This isn't specified as an error case, so return 0/0.
     *start_location_ptr = 0;
     *end_location_ptr = 0;
     return ERR(NONE);
   }

   DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
   *start_location_ptr = 0;
   *end_location_ptr = art_method->GetCodeItem()->insns_size_in_code_units_ - 1;

   return ERR(NONE);
 }

 jvmtiError MethodUtil::GetMethodModifiers(jvmtiEnv* env ATTRIBUTE_UNUSED,
                                           jmethodID method,
                                           jint* modifiers_ptr) {
   if (modifiers_ptr == nullptr) {
     return ERR(NULL_POINTER);
   }

   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
   uint32_t modifiers = art_method->GetAccessFlags();

   // Note: Keep this code in sync with Executable.fixMethodFlags.
   if ((modifiers & art::kAccAbstract) != 0) {
     modifiers &= ~art::kAccNative;
   }
   modifiers &= ~art::kAccSynchronized;
   if ((modifiers & art::kAccDeclaredSynchronized) != 0) {
     modifiers |= art::kAccSynchronized;
   }
   modifiers &= art::kAccJavaFlagsMask;

   *modifiers_ptr = modifiers;
   return ERR(NONE);
 }

 using LineNumberContext = std::vector<jvmtiLineNumberEntry>;

 static bool CollectLineNumbers(void* void_context, const art::DexFile::PositionInfo& entry) {
   LineNumberContext* context = reinterpret_cast<LineNumberContext*>(void_context);
   jvmtiLineNumberEntry jvmti_entry = { static_cast<jlocation>(entry.address_),
                                        static_cast<jint>(entry.line_) };
   context->push_back(jvmti_entry);
   return false;  // Collect all, no early exit.
 }

 jvmtiError MethodUtil::GetLineNumberTable(jvmtiEnv* env,
                                           jmethodID method,
                                           jint* entry_count_ptr,
                                           jvmtiLineNumberEntry** table_ptr) {
   if (method == nullptr) {
     return ERR(NULL_POINTER);
   }
   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
   DCHECK(!art_method->IsRuntimeMethod());

   const art::DexFile::CodeItem* code_item;
   const art::DexFile* dex_file;
   {
     art::ScopedObjectAccess soa(art::Thread::Current());

     if (art_method->IsProxyMethod()) {
       return ERR(ABSENT_INFORMATION);
     }
     if (art_method->IsNative()) {
       return ERR(NATIVE_METHOD);
     }
     if (entry_count_ptr == nullptr || table_ptr == nullptr) {
       return ERR(NULL_POINTER);
     }

     code_item = art_method->GetCodeItem();
     dex_file = art_method->GetDexFile();
     DCHECK(code_item != nullptr) << art_method->PrettyMethod() << " " << dex_file->GetLocation();
   }

   LineNumberContext context;
   bool success = dex_file->DecodeDebugPositionInfo(code_item, CollectLineNumbers, &context);
   if (!success) {
     return ERR(ABSENT_INFORMATION);
   }

   unsigned char* data;
   jlong mem_size = context.size() * sizeof(jvmtiLineNumberEntry);
   jvmtiError alloc_error = env->Allocate(mem_size, &data);
   if (alloc_error != ERR(NONE)) {
     return alloc_error;
   }
   *table_ptr = reinterpret_cast<jvmtiLineNumberEntry*>(data);
   memcpy(*table_ptr, context.data(), mem_size);
   *entry_count_ptr = static_cast<jint>(context.size());

   return ERR(NONE);
 }

 template <typename T>
 static jvmtiError IsMethodT(jvmtiEnv* env ATTRIBUTE_UNUSED,
                             jmethodID method,
                             T test,
                             jboolean* is_t_ptr) {
   if (method == nullptr) {
     return ERR(INVALID_METHODID);
   }
   if (is_t_ptr == nullptr) {
     return ERR(NULL_POINTER);
   }

   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
   *is_t_ptr = test(art_method) ? JNI_TRUE : JNI_FALSE;

   return ERR(NONE);
 }

 jvmtiError MethodUtil::IsMethodNative(jvmtiEnv* env, jmethodID m, jboolean* is_native_ptr) {
   auto test = [](art::ArtMethod* method) {
     return method->IsNative();
   };
   return IsMethodT(env, m, test, is_native_ptr);
 }

 jvmtiError MethodUtil::IsMethodObsolete(jvmtiEnv* env, jmethodID m, jboolean* is_obsolete_ptr) {
   auto test = [](art::ArtMethod* method) {
     return method->IsObsolete();
   };
   return IsMethodT(env, m, test, is_obsolete_ptr);
 }

 jvmtiError MethodUtil::IsMethodSynthetic(jvmtiEnv* env, jmethodID m, jboolean* is_synthetic_ptr) {
   auto test = [](art::ArtMethod* method) {
     return method->IsSynthetic();
   };
   return IsMethodT(env, m, test, is_synthetic_ptr);
 }

 }  // namespace openjdkjvmti
	/* Copyright (C) 2016 The Android Open Source Project
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This file implements interfaces from the file jvmti.h. This implementation
	* is licensed under the same terms as the file jvmti.h. The
	* copyright and license information for the file jvmti.h follows.
	*
	* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	#include "ti_method.h"

	#include "art_jvmti.h"
	#include "art_method-inl.h"
	#include "base/enums.h"
	#include "jni_internal.h"
	#include "modifiers.h"
	#include "scoped_thread_state_change-inl.h"
	#include "thread-inl.h"

	namespace openjdkjvmti {

	jvmtiError MethodUtil::GetArgumentsSize(jvmtiEnv* env ATTRIBUTE_UNUSED,
	jmethodID method,
	jint* size_ptr) {
	if (method == nullptr) {
	return ERR(INVALID_METHODID);
	}
	art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);

	if (art_method->IsNative()) {
	return ERR(NATIVE_METHOD);
	}

	if (size_ptr == nullptr) {
	return ERR(NULL_POINTER);
	}

	art::ScopedObjectAccess soa(art::Thread::Current());
	if (art_method->IsProxyMethod() \|\| art_method->IsAbstract()) {
	// This isn't specified as an error case, so return 0.
	*size_ptr = 0;
	return ERR(NONE);
	}

	DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
	*size_ptr = art_method->GetCodeItem()->ins_size_;

	return ERR(NONE);
	}

	jvmtiError MethodUtil::GetMaxLocals(jvmtiEnv* env ATTRIBUTE_UNUSED,
	jmethodID method,
	jint* max_ptr) {
	if (method == nullptr) {
	return ERR(INVALID_METHODID);
	}
	art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);

	if (art_method->IsNative()) {
	return ERR(NATIVE_METHOD);
	}

	if (max_ptr == nullptr) {
	return ERR(NULL_POINTER);
	}

	art::ScopedObjectAccess soa(art::Thread::Current());
	if (art_method->IsProxyMethod() \|\| art_method->IsAbstract()) {
	// This isn't specified as an error case, so return 0.
	*max_ptr = 0;
	return ERR(NONE);
	}

	DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
	*max_ptr = art_method->GetCodeItem()->registers_size_;

	return ERR(NONE);
	}

	jvmtiError MethodUtil::GetMethodName(jvmtiEnv* env,
	jmethodID method,
	char** name_ptr,
	char** signature_ptr,
	char** generic_ptr) {
	art::ScopedObjectAccess soa(art::Thread::Current());
	art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
	art_method = art_method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize);

	JvmtiUniquePtr name_copy;
	if (name_ptr != nullptr) {
	const char* method_name = art_method->GetName();
	if (method_name == nullptr) {
	method_name = "<error>";
	}
	unsigned char* tmp;
	jvmtiError ret = CopyString(env, method_name, &tmp);
	if (ret != ERR(NONE)) {
	return ret;
	}
	name_copy = MakeJvmtiUniquePtr(env, tmp);
	name_ptr = reinterpret_cast<char>(tmp);
	}

	JvmtiUniquePtr signature_copy;
	if (signature_ptr != nullptr) {
	const art::Signature sig = art_method->GetSignature();
	std::string str = sig.ToString();
	unsigned char* tmp;
	jvmtiError ret = CopyString(env, str.c_str(), &tmp);
	if (ret != ERR(NONE)) {
	return ret;
	}
	signature_copy = MakeJvmtiUniquePtr(env, tmp);
	signature_ptr = reinterpret_cast<char>(tmp);
	}

	// TODO: Support generic signature.
	if (generic_ptr != nullptr) {
	*generic_ptr = nullptr;
	}

	// Everything is fine, release the buffers.
	name_copy.release();
	signature_copy.release();

	return ERR(NONE);
	}

	jvmtiError MethodUtil::GetMethodDeclaringClass(jvmtiEnv* env ATTRIBUTE_UNUSED,
	jmethodID method,
	jclass* declaring_class_ptr) {
	if (declaring_class_ptr == nullptr) {
	return ERR(NULL_POINTER);
	}

	art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
	// Note: No GetInterfaceMethodIfProxy, we want to actual class.

	art::ScopedObjectAccess soa(art::Thread::Current());
	art::mirror::Class* klass = art_method->GetDeclaringClass();
	*declaring_class_ptr = soa.AddLocalReference<jclass>(klass);

	return ERR(NONE);
	}

	jvmtiError MethodUtil::GetMethodLocation(jvmtiEnv* env ATTRIBUTE_UNUSED,
	jmethodID method,
	jlocation* start_location_ptr,
	jlocation* end_location_ptr) {
	if (method == nullptr) {
	return ERR(INVALID_METHODID);
	}
	art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);

	if (art_method->IsNative()) {
	return ERR(NATIVE_METHOD);
	}

	if (start_location_ptr == nullptr \|\| end_location_ptr == nullptr) {
	return ERR(NULL_POINTER);
	}

	art::ScopedObjectAccess soa(art::Thread::Current());
	if (art_method->IsProxyMethod() \|\| art_method->IsAbstract()) {
	// This isn't specified as an error case, so return 0/0.
	*start_location_ptr = 0;
	*end_location_ptr = 0;
	return ERR(NONE);
	}

	DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
	*start_location_ptr = 0;
	*end_location_ptr = art_method->GetCodeItem()->insns_size_in_code_units_ - 1;

	return ERR(NONE);
	}

	jvmtiError MethodUtil::GetMethodModifiers(jvmtiEnv* env ATTRIBUTE_UNUSED,
	jmethodID method,
	jint* modifiers_ptr) {
	if (modifiers_ptr == nullptr) {
	return ERR(NULL_POINTER);
	}

	art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
	uint32_t modifiers = art_method->GetAccessFlags();

	// Note: Keep this code in sync with Executable.fixMethodFlags.
	if ((modifiers & art::kAccAbstract) != 0) {
	modifiers &= ~art::kAccNative;
	}
	modifiers &= ~art::kAccSynchronized;
	if ((modifiers & art::kAccDeclaredSynchronized) != 0) {
	modifiers \|= art::kAccSynchronized;
	}
	modifiers &= art::kAccJavaFlagsMask;

	*modifiers_ptr = modifiers;
	return ERR(NONE);
	}

	using LineNumberContext = std::vector<jvmtiLineNumberEntry>;

	static bool CollectLineNumbers(void* void_context, const art::DexFile::PositionInfo& entry) {
	LineNumberContext* context = reinterpret_cast<LineNumberContext*>(void_context);
	jvmtiLineNumberEntry jvmti_entry = { static_cast<jlocation>(entry.address_),
	static_cast<jint>(entry.line_) };
	context->push_back(jvmti_entry);
	return false; // Collect all, no early exit.
	}

	jvmtiError MethodUtil::GetLineNumberTable(jvmtiEnv* env,
	jmethodID method,
	jint* entry_count_ptr,
	jvmtiLineNumberEntry** table_ptr) {
	if (method == nullptr) {
	return ERR(NULL_POINTER);
	}
	art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
	DCHECK(!art_method->IsRuntimeMethod());

	const art::DexFile::CodeItem* code_item;
	const art::DexFile* dex_file;
	{
	art::ScopedObjectAccess soa(art::Thread::Current());

	if (art_method->IsProxyMethod()) {
	return ERR(ABSENT_INFORMATION);
	}
	if (art_method->IsNative()) {
	return ERR(NATIVE_METHOD);
	}
	if (entry_count_ptr == nullptr \|\| table_ptr == nullptr) {
	return ERR(NULL_POINTER);
	}

	code_item = art_method->GetCodeItem();
	dex_file = art_method->GetDexFile();
	DCHECK(code_item != nullptr) << art_method->PrettyMethod() << " " << dex_file->GetLocation();
	}

	LineNumberContext context;
	bool success = dex_file->DecodeDebugPositionInfo(code_item, CollectLineNumbers, &context);
	if (!success) {
	return ERR(ABSENT_INFORMATION);
	}

	unsigned char* data;
	jlong mem_size = context.size() * sizeof(jvmtiLineNumberEntry);
	jvmtiError alloc_error = env->Allocate(mem_size, &data);
	if (alloc_error != ERR(NONE)) {
	return alloc_error;
	}
	table_ptr = reinterpret_cast<jvmtiLineNumberEntry>(data);
	memcpy(*table_ptr, context.data(), mem_size);
	*entry_count_ptr = static_cast<jint>(context.size());

	return ERR(NONE);
	}

	template <typename T>
	static jvmtiError IsMethodT(jvmtiEnv* env ATTRIBUTE_UNUSED,
	jmethodID method,
	T test,
	jboolean* is_t_ptr) {
	if (method == nullptr) {
	return ERR(INVALID_METHODID);
	}
	if (is_t_ptr == nullptr) {
	return ERR(NULL_POINTER);
	}

	art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
	*is_t_ptr = test(art_method) ? JNI_TRUE : JNI_FALSE;

	return ERR(NONE);
	}

	jvmtiError MethodUtil::IsMethodNative(jvmtiEnv* env, jmethodID m, jboolean* is_native_ptr) {
	auto test = [](art::ArtMethod* method) {
	return method->IsNative();
	};
	return IsMethodT(env, m, test, is_native_ptr);
	}

	jvmtiError MethodUtil::IsMethodObsolete(jvmtiEnv* env, jmethodID m, jboolean* is_obsolete_ptr) {
	auto test = [](art::ArtMethod* method) {
	return method->IsObsolete();
	};
	return IsMethodT(env, m, test, is_obsolete_ptr);
	}

	jvmtiError MethodUtil::IsMethodSynthetic(jvmtiEnv* env, jmethodID m, jboolean* is_synthetic_ptr) {
	auto test = [](art::ArtMethod* method) {
	return method->IsSynthetic();
	};
	return IsMethodT(env, m, test, is_synthetic_ptr);
	}

	} // namespace openjdkjvmti