JDK14/Java14源码在线阅读
/*
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* 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
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#ifndef SHARE_JVMCI_JVMCIRUNTIME_HPP
#define SHARE_JVMCI_JVMCIRUNTIME_HPP
#include "code/nmethod.hpp"
#include "jvmci/jvmci.hpp"
#include "jvmci/jvmciExceptions.hpp"
#include "jvmci/jvmciObject.hpp"
class JVMCIEnv;
class JVMCICompiler;
class JVMCICompileState;
// Encapsulates the JVMCI metadata for an nmethod.
// JVMCINMethodData objects are inlined into nmethods
// at nmethod::_jvmci_data_offset.
class JVMCINMethodData {
// Index for the HotSpotNmethod mirror in the nmethod's oops table.
// This is -1 if there is no mirror in the oops table.
int _nmethod_mirror_index;
// Is HotSpotNmethod.name non-null? If so, the value is
// embedded in the end of this object.
bool _has_name;
// Address of the failed speculations list to which a speculation
// is appended when it causes a deoptimization.
FailedSpeculation** _failed_speculations;
public:
// Computes the size of a JVMCINMethodData object
static int compute_size(const char* nmethod_mirror_name) {
int size = sizeof(JVMCINMethodData);
if (nmethod_mirror_name != NULL) {
size += (int) strlen(nmethod_mirror_name) + 1;
}
return size;
}
void initialize(int nmethod_mirror_index,
const char* name,
FailedSpeculation** failed_speculations);
// Adds `speculation` to the failed speculations list.
void add_failed_speculation(nmethod* nm, jlong speculation);
// Gets the JVMCI name of the nmethod (which may be NULL).
const char* name() { return _has_name ? (char*)(((address) this) + sizeof(JVMCINMethodData)) : NULL; }
// Clears the HotSpotNmethod.address field in the mirror. If nm
// is dead, the HotSpotNmethod.entryPoint field is also cleared.
void invalidate_nmethod_mirror(nmethod* nm);
// Gets the mirror from nm's oops table.
oop get_nmethod_mirror(nmethod* nm, bool phantom_ref);
// Sets the mirror in nm's oops table.
void set_nmethod_mirror(nmethod* nm, oop mirror);
// Clears the mirror in nm's oops table.
void clear_nmethod_mirror(nmethod* nm);
};
// A top level class that represents an initialized JVMCI runtime.
// There is one instance of this class per HotSpotJVMCIRuntime object.
class JVMCIRuntime: public CHeapObj<mtJVMCI> {
public:
// Constants describing whether JVMCI wants to be able to adjust the compilation
// level selected for a method by the VM compilation policy and if so, based on
// what information about the method being schedule for compilation.
enum CompLevelAdjustment {
none = 0, // no adjustment
by_holder = 1, // adjust based on declaring class of method
by_full_signature = 2 // adjust based on declaring class, name and signature of method
};
private:
volatile bool _being_initialized;
volatile bool _initialized;
JVMCIObject _HotSpotJVMCIRuntime_instance;
bool _shutdown_called;
JVMCIObject create_jvmci_primitive_type(BasicType type, JVMCI_TRAPS);
// Implementation methods for loading and constant pool access.
static Klass* get_klass_by_name_impl(Klass*& accessing_klass,
const constantPoolHandle& cpool,
Symbol* klass_name,
bool require_local);
static Klass* get_klass_by_index_impl(const constantPoolHandle& cpool,
int klass_index,
bool& is_accessible,
Klass* loading_klass);
static void get_field_by_index_impl(InstanceKlass* loading_klass, fieldDescriptor& fd,
int field_index);
static Method* get_method_by_index_impl(const constantPoolHandle& cpool,
int method_index, Bytecodes::Code bc,
InstanceKlass* loading_klass);
// Helper methods
static bool check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass);
static Method* lookup_method(InstanceKlass* accessor,
Klass* holder,
Symbol* name,
Symbol* sig,
Bytecodes::Code bc,
constantTag tag);
public:
JVMCIRuntime() {
_initialized = false;
_being_initialized = false;
_shutdown_called = false;
}
/**
* Compute offsets and construct any state required before executing JVMCI code.
*/
void initialize(JVMCIEnv* jvmciEnv);
/**
* Gets the singleton HotSpotJVMCIRuntime instance, initializing it if necessary
*/
JVMCIObject get_HotSpotJVMCIRuntime(JVMCI_TRAPS);
bool is_HotSpotJVMCIRuntime_initialized() {
return _HotSpotJVMCIRuntime_instance.is_non_null();
}
/**
* Trigger initialization of HotSpotJVMCIRuntime through JVMCI.getRuntime()
*/
void initialize_JVMCI(JVMCI_TRAPS);
/**
* Explicitly initialize HotSpotJVMCIRuntime itself
*/
void initialize_HotSpotJVMCIRuntime(JVMCI_TRAPS);
void call_getCompiler(TRAPS);
void shutdown();
bool shutdown_called() {
return _shutdown_called;
}
void bootstrap_finished(TRAPS);
// Look up a klass by name from a particular class loader (the accessor's).
// If require_local, result must be defined in that class loader, or NULL.
// If !require_local, a result from remote class loader may be reported,
// if sufficient class loader constraints exist such that initiating
// a class loading request from the given loader is bound to return
// the class defined in the remote loader (or throw an error).
//
// Return an unloaded klass if !require_local and no class at all is found.
//
// The CI treats a klass as loaded if it is consistently defined in
// another loader, even if it hasn't yet been loaded in all loaders
// that could potentially see it via delegation.
static Klass* get_klass_by_name(Klass* accessing_klass,
Symbol* klass_name,
bool require_local);
// Constant pool access.
static Klass* get_klass_by_index(const constantPoolHandle& cpool,
int klass_index,
bool& is_accessible,
Klass* loading_klass);
static void get_field_by_index(InstanceKlass* loading_klass, fieldDescriptor& fd,
int field_index);
static Method* get_method_by_index(const constantPoolHandle& cpool,
int method_index, Bytecodes::Code bc,
InstanceKlass* loading_klass);
// converts the Klass* representing the holder of a method into a
// InstanceKlass*. This is needed since the holder of a method in
// the bytecodes could be an array type. Basically this converts
// array types into java/lang/Object and other types stay as they are.
static InstanceKlass* get_instance_klass_for_declared_method_holder(Klass* klass);
// Helper routine for determining the validity of a compilation
// with respect to concurrent class loading.
static JVMCI::CodeInstallResult validate_compile_task_dependencies(Dependencies* target, JVMCICompileState* task, char** failure_detail);
// Compiles `target` with the JVMCI compiler.
void compile_method(JVMCIEnv* JVMCIENV, JVMCICompiler* compiler, const methodHandle& target, int entry_bci);
// Register the result of a compilation.
JVMCI::CodeInstallResult register_method(JVMCIEnv* JVMCIENV,
const methodHandle& target,
nmethod*& nm,
int entry_bci,
CodeOffsets* offsets,
int orig_pc_offset,
CodeBuffer* code_buffer,
int frame_words,
OopMapSet* oop_map_set,
ExceptionHandlerTable* handler_table,
ImplicitExceptionTable* implicit_exception_table,
AbstractCompiler* compiler,
DebugInformationRecorder* debug_info,
Dependencies* dependencies,
int compile_id,
bool has_unsafe_access,
bool has_wide_vector,
JVMCIObject compiled_code,
JVMCIObject nmethod_mirror,
FailedSpeculation** failed_speculations,
char* speculations,
int speculations_len);
/**
* Exits the VM due to an unexpected exception.
*/
static void exit_on_pending_exception(JVMCIEnv* JVMCIENV, const char* message);
static void describe_pending_hotspot_exception(JavaThread* THREAD, bool clear);
#define CHECK_EXIT THREAD); \
if (HAS_PENDING_EXCEPTION) { \
char buf[256]; \
jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
JVMCIRuntime::exit_on_pending_exception(NULL, buf); \
return; \
} \
(void)(0
#define CHECK_EXIT_(v) THREAD); \
if (HAS_PENDING_EXCEPTION) { \
char buf[256]; \
jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
JVMCIRuntime::exit_on_pending_exception(NULL, buf); \
return v; \
} \
(void)(0
#define JVMCI_CHECK_EXIT JVMCIENV); \
if (JVMCIENV->has_pending_exception()) { \
char buf[256]; \
jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
JVMCIRuntime::exit_on_pending_exception(JVMCIENV, buf); \
return; \
} \
(void)(0
#define JVMCI_CHECK_EXIT_(result) JVMCIENV); \
if (JVMCIENV->has_pending_exception()) { \
char buf[256]; \
jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
JVMCIRuntime::exit_on_pending_exception(JVMCIENV, buf); \
return result; \
} \
(void)(0
static BasicType kindToBasicType(const Handle& kind, TRAPS);
static void new_instance_common(JavaThread* thread, Klass* klass, bool null_on_fail);
static void new_array_common(JavaThread* thread, Klass* klass, jint length, bool null_on_fail);
static void new_multi_array_common(JavaThread* thread, Klass* klass, int rank, jint* dims, bool null_on_fail);
static void dynamic_new_array_common(JavaThread* thread, oopDesc* element_mirror, jint length, bool null_on_fail);
static void dynamic_new_instance_common(JavaThread* thread, oopDesc* type_mirror, bool null_on_fail);
// The following routines are called from compiled JVMCI code
// When allocation fails, these stubs:
// 1. Exercise -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError handling and also
// post a JVMTI_EVENT_RESOURCE_EXHAUSTED event if the failure is an OutOfMemroyError
// 2. Return NULL with a pending exception.
// Compiled code must ensure these stubs are not called twice for the same allocation
// site due to the non-repeatable side effects in the case of OOME.
static void new_instance(JavaThread* thread, Klass* klass) { new_instance_common(thread, klass, false); }
static void new_array(JavaThread* thread, Klass* klass, jint length) { new_array_common(thread, klass, length, false); }
static void new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims) { new_multi_array_common(thread, klass, rank, dims, false); }
static void dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length) { dynamic_new_array_common(thread, element_mirror, length, false); }
static void dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror) { dynamic_new_instance_common(thread, type_mirror, false); }
// When allocation fails, these stubs return NULL and have no pending exception. Compiled code
// can use these stubs if a failed allocation will be retried (e.g., by deoptimizing and
// re-executing in the interpreter).
static void new_instance_or_null(JavaThread* thread, Klass* klass) { new_instance_common(thread, klass, true); }
static void new_array_or_null(JavaThread* thread, Klass* klass, jint length) { new_array_common(thread, klass, length, true); }
static void new_multi_array_or_null(JavaThread* thread, Klass* klass, int rank, jint* dims) { new_multi_array_common(thread, klass, rank, dims, true); }
static void dynamic_new_array_or_null(JavaThread* thread, oopDesc* element_mirror, jint length) { dynamic_new_array_common(thread, element_mirror, length, true); }
static void dynamic_new_instance_or_null(JavaThread* thread, oopDesc* type_mirror) { dynamic_new_instance_common(thread, type_mirror, true); }
static void vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3);
static jint identity_hash_code(JavaThread* thread, oopDesc* obj);
static address exception_handler_for_pc(JavaThread* thread);
static void monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock);
static void monitorexit (JavaThread* thread, oopDesc* obj, BasicLock* lock);
static jboolean object_notify(JavaThread* thread, oopDesc* obj);
static jboolean object_notifyAll(JavaThread* thread, oopDesc* obj);
static void vm_error(JavaThread* thread, jlong where, jlong format, jlong value);
static oopDesc* load_and_clear_exception(JavaThread* thread);
static void log_printf(JavaThread* thread, const char* format, jlong v1, jlong v2, jlong v3);
static void log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline);
// Print the passed in object, optionally followed by a newline. If
// as_string is true and the object is a java.lang.String then it
// printed as a string, otherwise the type of the object is printed
// followed by its address.
static void log_object(JavaThread* thread, oopDesc* object, bool as_string, bool newline);
#if INCLUDE_G1GC
static void write_barrier_pre(JavaThread* thread, oopDesc* obj);
static void write_barrier_post(JavaThread* thread, void* card);
#endif
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