jdk8-mips64-public/hotspot: comparison src/share/vm/runtime/javaCalls.cpp

--1:000000000000
+:f90c822e73f8
+/*
+* Copyright (c) 1997, 2013, 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.
+*
+* 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 "precompiled.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "classfile/vmSymbols.hpp"
+#include "code/nmethod.hpp"
+#include "compiler/compileBroker.hpp"
+#include "interpreter/interpreter.hpp"
+#include "interpreter/linkResolver.hpp"
+#include "memory/universe.inline.hpp"
+#include "oops/oop.inline.hpp"
+#include "prims/jniCheck.hpp"
+#include "runtime/compilationPolicy.hpp"
+#include "runtime/handles.inline.hpp"
+#include "runtime/interfaceSupport.hpp"
+#include "runtime/javaCalls.hpp"
+#include "runtime/mutexLocker.hpp"
+#include "runtime/signature.hpp"
+#include "runtime/stubRoutines.hpp"
+#include "runtime/thread.inline.hpp"
+// -----------------------------------------------------
+// Implementation of JavaCallWrapper
+JavaCallWrapper::JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS) {
+JavaThread* thread = (JavaThread *)THREAD;
+bool clear_pending_exception = true;
+guarantee(thread->is_Java_thread(), "crucial check - the VM thread cannot and must not escape to Java code");
+assert(!thread->owns_locks(), "must release all locks when leaving VM");
+guarantee(!thread->is_Compiler_thread(), "cannot make java calls from the compiler");
+_result   = result;
+// Allocate handle block for Java code. This must be done before we change thread_state to _thread_in_Java_or_stub,
+// since it can potentially block.
+JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
+// After this, we are official in JavaCode. This needs to be done before we change any of the thread local
+// info, since we cannot find oops before the new information is set up completely.
+ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_Java);
+// Make sure that we handle asynchronous stops and suspends _before_ we clear all thread state
+// in JavaCallWrapper::JavaCallWrapper(). This way, we can decide if we need to do any pd actions
+// to prepare for stop/suspend (flush register windows on sparcs, cache sp, or other state).
+if (thread->has_special_runtime_exit_condition()) {
+thread->handle_special_runtime_exit_condition();
+if (HAS_PENDING_EXCEPTION) {
+clear_pending_exception = false;
+}
+}
+// Make sure to set the oop's after the thread transition - since we can block there. No one is GC'ing
+// the JavaCallWrapper before the entry frame is on the stack.
+_callee_method = callee_method();
+_receiver = receiver();
+#ifdef CHECK_UNHANDLED_OOPS
+THREAD->allow_unhandled_oop(&_receiver);
+#endif // CHECK_UNHANDLED_OOPS
+_thread       = (JavaThread *)thread;
+_handles      = _thread->active_handles();    // save previous handle block & Java frame linkage
+// For the profiler, the last_Java_frame information in thread must always be in
+// legal state. We have no last Java frame if last_Java_sp == NULL so
+// the valid transition is to clear _last_Java_sp and then reset the rest of
+// the (platform specific) state.
+_anchor.copy(_thread->frame_anchor());
+_thread->frame_anchor()->clear();
+debug_only(_thread->inc_java_call_counter());
+_thread->set_active_handles(new_handles);     // install new handle block and reset Java frame linkage
+assert (_thread->thread_state() != _thread_in_native, "cannot set native pc to NULL");
+// clear any pending exception in thread (native calls start with no exception pending)
+if(clear_pending_exception) {
+_thread->clear_pending_exception();
+}
+if (_anchor.last_Java_sp() == NULL) {
+_thread->record_base_of_stack_pointer();
+}
+}
+JavaCallWrapper::~JavaCallWrapper() {
+assert(_thread == JavaThread::current(), "must still be the same thread");
+// restore previous handle block & Java frame linkage
+JNIHandleBlock *_old_handles = _thread->active_handles();
+_thread->set_active_handles(_handles);
+_thread->frame_anchor()->zap();
+debug_only(_thread->dec_java_call_counter());
+if (_anchor.last_Java_sp() == NULL) {
+_thread->set_base_of_stack_pointer(NULL);
+}
+// Old thread-local info. has been restored. We are not back in the VM.
+ThreadStateTransition::transition_from_java(_thread, _thread_in_vm);
+// State has been restored now make the anchor frame visible for the profiler.
+// Do this after the transition because this allows us to put an assert
+// the Java->vm transition which checks to see that stack is not walkable
+// on sparc/ia64 which will catch violations of the reseting of last_Java_frame
+// invariants (i.e. _flags always cleared on return to Java)
+_thread->frame_anchor()->copy(&_anchor);
+// Release handles after we are marked as being inside the VM again, since this
+// operation might block
+JNIHandleBlock::release_block(_old_handles, _thread);
+}
+void JavaCallWrapper::oops_do(OopClosure* f) {
+f->do_oop((oop*)&_receiver);
+handles()->oops_do(f);
+}
+// Helper methods
+static BasicType runtime_type_from(JavaValue* result) {
+switch (result->get_type()) {
+case T_BOOLEAN: // fall through
+case T_CHAR   : // fall through
+case T_SHORT  : // fall through
+case T_INT    : // fall through
+#ifndef _LP64
+case T_OBJECT : // fall through
+case T_ARRAY  : // fall through
+#endif
+case T_BYTE   : // fall through
+case T_VOID   : return T_INT;
+case T_LONG   : return T_LONG;
+case T_FLOAT  : return T_FLOAT;
+case T_DOUBLE : return T_DOUBLE;
+#ifdef _LP64
+case T_ARRAY  : // fall through
+case T_OBJECT:  return T_OBJECT;
+#endif
+}
+ShouldNotReachHere();
+return T_ILLEGAL;
+}
+// ===== object constructor calls =====
+void JavaCalls::call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS) {
+assert(method->name() == vmSymbols::object_initializer_name(),    "Should only be called for default constructor");
+assert(method->signature() == vmSymbols::void_method_signature(), "Should only be called for default constructor");
+InstanceKlass* ik = method->method_holder();
+if (ik->is_initialized() && ik->has_vanilla_constructor()) {
+// safe to skip constructor call
+} else {
+static JavaValue result(T_VOID);
+JavaCallArguments args(receiver);
+call(&result, method, &args, CHECK);
+}
+}
+// ============ Virtual calls ============
+void JavaCalls::call_virtual(JavaValue* result, KlassHandle spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
+CallInfo callinfo;
+Handle receiver = args->receiver();
+KlassHandle recvrKlass(THREAD, receiver.is_null() ? (Klass*)NULL : receiver->klass());
+LinkResolver::resolve_virtual_call(
+callinfo, receiver, recvrKlass, spec_klass, name, signature,
+KlassHandle(), false, true, CHECK);
+methodHandle method = callinfo.selected_method();
+assert(method.not_null(), "should have thrown exception");
+// Invoke the method
+JavaCalls::call(result, method, args, CHECK);
+}
+void JavaCalls::call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, TRAPS) {
+JavaCallArguments args(receiver); // One oop argument
+call_virtual(result, spec_klass, name, signature, &args, CHECK);
+}
+void JavaCalls::call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
+JavaCallArguments args(receiver); // One oop argument
+args.push_oop(arg1);
+call_virtual(result, spec_klass, name, signature, &args, CHECK);
+}
+void JavaCalls::call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
+JavaCallArguments args(receiver); // One oop argument
+args.push_oop(arg1);
+args.push_oop(arg2);
+call_virtual(result, spec_klass, name, signature, &args, CHECK);
+}
+// ============ Special calls ============
+void JavaCalls::call_special(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
+CallInfo callinfo;
+LinkResolver::resolve_special_call(callinfo, klass, name, signature, KlassHandle(), false, CHECK);
+methodHandle method = callinfo.selected_method();
+assert(method.not_null(), "should have thrown exception");
+// Invoke the method
+JavaCalls::call(result, method, args, CHECK);
+}
+void JavaCalls::call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
+JavaCallArguments args(receiver); // One oop argument
+call_special(result, klass, name, signature, &args, CHECK);
+}
+void JavaCalls::call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
+JavaCallArguments args(receiver); // One oop argument
+args.push_oop(arg1);
+call_special(result, klass, name, signature, &args, CHECK);
+}
+void JavaCalls::call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
+JavaCallArguments args(receiver); // One oop argument
+args.push_oop(arg1);
+args.push_oop(arg2);
+call_special(result, klass, name, signature, &args, CHECK);
+}
+// ============ Static calls ============
+void JavaCalls::call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
+CallInfo callinfo;
+LinkResolver::resolve_static_call(callinfo, klass, name, signature, KlassHandle(), false, true, CHECK);
+methodHandle method = callinfo.selected_method();
+assert(method.not_null(), "should have thrown exception");
+// Invoke the method
+JavaCalls::call(result, method, args, CHECK);
+}
+void JavaCalls::call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS) {
+JavaCallArguments args; // No argument
+call_static(result, klass, name, signature, &args, CHECK);
+}
+void JavaCalls::call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
+JavaCallArguments args(arg1); // One oop argument
+call_static(result, klass, name, signature, &args, CHECK);
+}
+void JavaCalls::call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
+JavaCallArguments args; // One oop argument
+args.push_oop(arg1);
+args.push_oop(arg2);
+call_static(result, klass, name, signature, &args, CHECK);
+}
+// -------------------------------------------------
+// Implementation of JavaCalls (low level)
+void JavaCalls::call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS) {
+// Check if we need to wrap a potential OS exception handler around thread
+// This is used for e.g. Win32 structured exception handlers
+assert(THREAD->is_Java_thread(), "only JavaThreads can make JavaCalls");
+// Need to wrap each and everytime, since there might be native code down the
+// stack that has installed its own exception handlers
+os::os_exception_wrapper(call_helper, result, &method, args, THREAD);
+}
+void JavaCalls::call_helper(JavaValue* result, methodHandle* m, JavaCallArguments* args, TRAPS) {
+methodHandle method = *m;
+JavaThread* thread = (JavaThread*)THREAD;
+assert(thread->is_Java_thread(), "must be called by a java thread");
+assert(method.not_null(), "must have a method to call");
+assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation");
+assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here");
+CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();)
+// Verify the arguments
+if (CheckJNICalls)  {
+args->verify(method, result->get_type(), thread);
+}
+else debug_only(args->verify(method, result->get_type(), thread));
+// Ignore call if method is empty
+if (method->is_empty_method()) {
+assert(result->get_type() == T_VOID, "an empty method must return a void value");
+return;
+}
+#ifdef ASSERT
+{ InstanceKlass* holder = method->method_holder();
+// A klass might not be initialized since JavaCall's might be used during the executing of
+// the <clinit>. For example, a Thread.start might start executing on an object that is
+// not fully initialized! (bad Java programming style)
+assert(holder->is_linked(), "rewritting must have taken place");
+}
+#endif
+assert(!thread->is_Compiler_thread(), "cannot compile from the compiler");
+if (CompilationPolicy::must_be_compiled(method)) {
+CompileBroker::compile_method(method, InvocationEntryBci,
+CompilationPolicy::policy()->initial_compile_level(),
+methodHandle(), 0, "must_be_compiled", CHECK);
+}
+// Since the call stub sets up like the interpreter we call the from_interpreted_entry
+// so we can go compiled via a i2c. Otherwise initial entry method will always
+// run interpreted.
+address entry_point = method->from_interpreted_entry();
+if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
+entry_point = method->interpreter_entry();
+}
+// Figure out if the result value is an oop or not (Note: This is a different value
+// than result_type. result_type will be T_INT of oops. (it is about size)
+BasicType result_type = runtime_type_from(result);
+bool oop_result_flag = (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY);
+// NOTE: if we move the computation of the result_val_address inside
+// the call to call_stub, the optimizer produces wrong code.
+intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
+// Find receiver
+Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
+// When we reenter Java, we need to reenable the yellow zone which
+// might already be disabled when we are in VM.
+if (thread->stack_yellow_zone_disabled()) {
+thread->reguard_stack();
+}
+// Check that there are shadow pages available before changing thread state
+// to Java
+if (!os::stack_shadow_pages_available(THREAD, method)) {
+// Throw stack overflow exception with preinitialized exception.
+Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
+return;
+} else {
+// Touch pages checked if the OS needs them to be touched to be mapped.
+os::bang_stack_shadow_pages();
+}
+// do call
+{ JavaCallWrapper link(method, receiver, result, CHECK);
+{ HandleMark hm(thread);  // HandleMark used by HandleMarkCleaner
+StubRoutines::call_stub()(
+(address)&link,
+// (intptr_t*)&(result->_value), // see NOTE above (compiler problem)
+result_val_address,          // see NOTE above (compiler problem)
+result_type,
+method(),
+entry_point,
+args->parameters(),
+args->size_of_parameters(),
+CHECK
+);
+result = link.result();  // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
+// Preserve oop return value across possible gc points
+if (oop_result_flag) {
+thread->set_vm_result((oop) result->get_jobject());
+}
+}
+} // Exit JavaCallWrapper (can block - potential return oop must be preserved)
+// Check if a thread stop or suspend should be executed
+// The following assert was not realistic.  Thread.stop can set that bit at any moment.
+//assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
+// Restore possible oop return
+if (oop_result_flag) {
+result->set_jobject((jobject)thread->vm_result());
+thread->set_vm_result(NULL);
+}
+}
+//--------------------------------------------------------------------------------------
+// Implementation of JavaCallArguments
+intptr_t* JavaCallArguments::parameters() {
+// First convert all handles to oops
+for(int i = 0; i < _size; i++) {
+if (_is_oop[i]) {
+// Handle conversion
+_value[i] = cast_from_oop<intptr_t>(Handle::raw_resolve((oop *)_value[i]));
+}
+}
+// Return argument vector
+return _value;
+}
+class SignatureChekker : public SignatureIterator {
+private:
+bool *_is_oop;
+int   _pos;
+BasicType _return_type;
+intptr_t*   _value;
+Thread* _thread;
+public:
+bool _is_return;
+SignatureChekker(Symbol* signature, BasicType return_type, bool is_static, bool* is_oop, intptr_t* value, Thread* thread) : SignatureIterator(signature) {
+_is_oop = is_oop;
+_is_return = false;
+_return_type = return_type;
+_pos = 0;
+_value = value;
+_thread = thread;
+if (!is_static) {
+check_value(true); // Receiver must be an oop
+}
+}
+void check_value(bool type) {
+guarantee(_is_oop[_pos++] == type, "signature does not match pushed arguments");
+}
+void check_doing_return(bool state) { _is_return = state; }
+void check_return_type(BasicType t) {
+guarantee(_is_return && t == _return_type, "return type does not match");
+}
+void check_int(BasicType t) {
+if (_is_return) {
+check_return_type(t);
+return;
+}
+check_value(false);
+}
+void check_double(BasicType t) { check_long(t); }
+void check_long(BasicType t) {
+if (_is_return) {
+check_return_type(t);
+return;
+}
+check_value(false);
+check_value(false);
+}
+void check_obj(BasicType t) {
+if (_is_return) {
+check_return_type(t);
+return;
+}
+// verify handle and the oop pointed to by handle
+int p = _pos;
+bool bad = false;
+// If argument is oop
+if (_is_oop[p]) {
+intptr_t v = _value[p];
+if (v != 0 ) {
+size_t t = (size_t)v;
+bad = (t < (size_t)os::vm_page_size() ) || !Handle::raw_resolve((oop *)v)->is_oop_or_null(true);
+if (CheckJNICalls && bad) {
+ReportJNIFatalError((JavaThread*)_thread, "Bad JNI oop argument");
+}
+}
+// for the regular debug case.
+assert(!bad, "Bad JNI oop argument");
+}
+check_value(true);
+}
+void do_bool()                       { check_int(T_BOOLEAN);       }
+void do_char()                       { check_int(T_CHAR);          }
+void do_float()                      { check_int(T_FLOAT);         }
+void do_double()                     { check_double(T_DOUBLE);     }
+void do_byte()                       { check_int(T_BYTE);          }
+void do_short()                      { check_int(T_SHORT);         }
+void do_int()                        { check_int(T_INT);           }
+void do_long()                       { check_long(T_LONG);         }
+void do_void()                       { check_return_type(T_VOID);  }
+void do_object(int begin, int end)   { check_obj(T_OBJECT);        }
+void do_array(int begin, int end)    { check_obj(T_OBJECT);        }
+};
+void JavaCallArguments::verify(methodHandle method, BasicType return_type,
+Thread *thread) {
+guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
+// Treat T_OBJECT and T_ARRAY as the same
+if (return_type == T_ARRAY) return_type = T_OBJECT;
+// Check that oop information is correct
+Symbol* signature = method->signature();
+SignatureChekker sc(signature, return_type, method->is_static(),_is_oop, _value, thread);
+sc.iterate_parameters();
+sc.check_doing_return(true);
+sc.iterate_returntype();
+}

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/runtime/javaCalls.cpp

src/share/vm/runtime/javaCalls.cpp