本文整理汇总了C++中ZeroStack类的典型用法代码示例。如果您正苦于以下问题:C++ ZeroStack类的具体用法?C++ ZeroStack怎么用?C++ ZeroStack使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了ZeroStack类的8个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: remove_vmslots
void CppInterpreter::remove_vmslots(int first_slot, int num_slots, TRAPS) {
JavaThread *thread = (JavaThread *) THREAD;
ZeroStack *stack = thread->zero_stack();
intptr_t *vmslots = stack->sp();
// Move everything down
for (int i = first_slot - 1; i >= 0; i--)
SET_VMSLOTS_SLOT(VMSLOTS_SLOT(i), i + num_slots);
// Deallocate the space
stack->set_sp(stack->sp() + num_slots);
}
开发者ID:RichardWarburton,项目名称:jdk8_tl,代码行数:12,代码来源:cppInterpreter_zero.cpp
示例2: insert_vmslots
// The new slots will be inserted before slot insert_before.
// Slots < insert_before will have the same slot number after the insert.
// Slots >= insert_before will become old_slot + num_slots.
void CppInterpreter::insert_vmslots(int insert_before, int num_slots, TRAPS) {
JavaThread *thread = (JavaThread *) THREAD;
ZeroStack *stack = thread->zero_stack();
// Allocate the space
stack->overflow_check(num_slots, CHECK);
stack->alloc(num_slots * wordSize);
intptr_t *vmslots = stack->sp();
// Shuffle everything up
for (int i = 0; i < insert_before; i++)
SET_VMSLOTS_SLOT(VMSLOTS_SLOT(i + num_slots), i);
}
开发者ID:RichardWarburton,项目名称:jdk8_tl,代码行数:16,代码来源:cppInterpreter_zero.cpp
示例3: empty_entry
int CppInterpreter::empty_entry(methodOop method, intptr_t UNUSED, TRAPS) {
JavaThread *thread = (JavaThread *) THREAD;
ZeroStack *stack = thread->zero_stack();
// Drop into the slow path if we need a safepoint check
if (SafepointSynchronize::do_call_back()) {
return normal_entry(method, 0, THREAD);
}
// Pop our parameters
stack->set_sp(stack->sp() + method->size_of_parameters());
// No deoptimized frames on the stack
return 0;
}
开发者ID:,项目名称:,代码行数:15,代码来源:
示例4: invoke_target
void MethodHandles::invoke_target(Method* method, TRAPS) {
JavaThread *thread = (JavaThread *) THREAD;
ZeroStack *stack = thread->zero_stack();
InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame();
interpreterState istate = frame->interpreter_state();
// Trim back the stack to put the parameters at the top
stack->set_sp(istate->stack() + 1);
Interpreter::invoke_method(method, method->from_interpreted_entry(), THREAD);
// Convert the result
istate->set_stack(stack->sp() - 1);
}
开发者ID:4T-Shirt,项目名称:OpenJDK-Research,代码行数:16,代码来源:methodHandles_zero.cpp
示例5: assert
EntryFrame *EntryFrame::build(const intptr_t* parameters,
int parameter_words,
JavaCallWrapper* call_wrapper,
TRAPS) {
ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
stack->overflow_check(header_words + parameter_words, CHECK_NULL);
stack->push(0); // next_frame, filled in later
intptr_t *fp = stack->sp();
assert(fp - stack->sp() == next_frame_off, "should be");
stack->push(ENTRY_FRAME);
assert(fp - stack->sp() == frame_type_off, "should be");
stack->push((intptr_t) call_wrapper);
assert(fp - stack->sp() == call_wrapper_off, "should be");
for (int i = 0; i < parameter_words; i++)
stack->push(parameters[i]);
return (EntryFrame *) fp;
}
开发者ID:,项目名称:,代码行数:23,代码来源:
示例6: main_loop
void CppInterpreter::main_loop(int recurse, TRAPS) {
JavaThread *thread = (JavaThread *) THREAD;
ZeroStack *stack = thread->zero_stack();
// If we are entering from a deopt we may need to call
// ourself a few times in order to get to our frame.
if (recurse)
main_loop(recurse - 1, THREAD);
InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame();
interpreterState istate = frame->interpreter_state();
methodOop method = istate->method();
intptr_t *result = NULL;
int result_slots = 0;
while (true) {
// We can set up the frame anchor with everything we want at
// this point as we are thread_in_Java and no safepoints can
// occur until we go to vm mode. We do have to clear flags
// on return from vm but that is it.
thread->set_last_Java_frame();
// Call the interpreter
if (JvmtiExport::can_post_interpreter_events())
BytecodeInterpreter::runWithChecks(istate);
else
BytecodeInterpreter::run(istate);
fixup_after_potential_safepoint();
// Clear the frame anchor
thread->reset_last_Java_frame();
// Examine the message from the interpreter to decide what to do
if (istate->msg() == BytecodeInterpreter::call_method) {
methodOop callee = istate->callee();
// Trim back the stack to put the parameters at the top
stack->set_sp(istate->stack() + 1);
// Make the call
Interpreter::invoke_method(callee, istate->callee_entry_point(), THREAD);
fixup_after_potential_safepoint();
// Convert the result
istate->set_stack(stack->sp() - 1);
// Restore the stack
stack->set_sp(istate->stack_limit() + 1);
// Resume the interpreter
istate->set_msg(BytecodeInterpreter::method_resume);
}
else if (istate->msg() == BytecodeInterpreter::more_monitors) {
int monitor_words = frame::interpreter_frame_monitor_size();
// Allocate the space
stack->overflow_check(monitor_words, THREAD);
if (HAS_PENDING_EXCEPTION)
break;
stack->alloc(monitor_words * wordSize);
// Move the expression stack contents
for (intptr_t *p = istate->stack() + 1; p < istate->stack_base(); p++)
*(p - monitor_words) = *p;
// Move the expression stack pointers
istate->set_stack_limit(istate->stack_limit() - monitor_words);
istate->set_stack(istate->stack() - monitor_words);
istate->set_stack_base(istate->stack_base() - monitor_words);
// Zero the new monitor so the interpreter can find it.
((BasicObjectLock *) istate->stack_base())->set_obj(NULL);
// Resume the interpreter
istate->set_msg(BytecodeInterpreter::got_monitors);
}
else if (istate->msg() == BytecodeInterpreter::return_from_method) {
// Copy the result into the caller's frame
result_slots = type2size[result_type_of(method)];
assert(result_slots >= 0 && result_slots <= 2, "what?");
result = istate->stack() + result_slots;
break;
}
else if (istate->msg() == BytecodeInterpreter::throwing_exception) {
assert(HAS_PENDING_EXCEPTION, "should do");
break;
}
else if (istate->msg() == BytecodeInterpreter::do_osr) {
// Unwind the current frame
thread->pop_zero_frame();
// Remove any extension of the previous frame
int extra_locals = method->max_locals() - method->size_of_parameters();
stack->set_sp(stack->sp() + extra_locals);
// Jump into the OSR method
Interpreter::invoke_osr(
method, istate->osr_entry(), istate->osr_buf(), THREAD);
return;
//.........这里部分代码省略.........
开发者ID:,项目名称:,代码行数:101,代码来源:
示例7: accessor_entry
int CppInterpreter::accessor_entry(methodOop method, intptr_t UNUSED, TRAPS) {
JavaThread *thread = (JavaThread *) THREAD;
ZeroStack *stack = thread->zero_stack();
intptr_t *locals = stack->sp();
// Drop into the slow path if we need a safepoint check
if (SafepointSynchronize::do_call_back()) {
return normal_entry(method, 0, THREAD);
}
// Load the object pointer and drop into the slow path
// if we have a NullPointerException
oop object = LOCALS_OBJECT(0);
if (object == NULL) {
return normal_entry(method, 0, THREAD);
}
// Read the field index from the bytecode, which looks like this:
// 0: aload_0
// 1: getfield
// 2: index
// 3: index
// 4: ireturn/areturn
// NB this is not raw bytecode: index is in machine order
u1 *code = method->code_base();
assert(code[0] == Bytecodes::_aload_0 &&
code[1] == Bytecodes::_getfield &&
(code[4] == Bytecodes::_ireturn ||
code[4] == Bytecodes::_areturn), "should do");
u2 index = Bytes::get_native_u2(&code[2]);
// Get the entry from the constant pool cache, and drop into
// the slow path if it has not been resolved
constantPoolCacheOop cache = method->constants()->cache();
ConstantPoolCacheEntry* entry = cache->entry_at(index);
if (!entry->is_resolved(Bytecodes::_getfield)) {
return normal_entry(method, 0, THREAD);
}
// Get the result and push it onto the stack
switch (entry->flag_state()) {
case ltos:
case dtos:
stack->overflow_check(1, CHECK_0);
stack->alloc(wordSize);
break;
}
if (entry->is_volatile()) {
switch (entry->flag_state()) {
case ctos:
SET_LOCALS_INT(object->char_field_acquire(entry->f2()), 0);
break;
case btos:
SET_LOCALS_INT(object->byte_field_acquire(entry->f2()), 0);
break;
case stos:
SET_LOCALS_INT(object->short_field_acquire(entry->f2()), 0);
break;
case itos:
SET_LOCALS_INT(object->int_field_acquire(entry->f2()), 0);
break;
case ltos:
SET_LOCALS_LONG(object->long_field_acquire(entry->f2()), 0);
break;
case ftos:
SET_LOCALS_FLOAT(object->float_field_acquire(entry->f2()), 0);
break;
case dtos:
SET_LOCALS_DOUBLE(object->double_field_acquire(entry->f2()), 0);
break;
case atos:
SET_LOCALS_OBJECT(object->obj_field_acquire(entry->f2()), 0);
break;
default:
ShouldNotReachHere();
}
}
else {
switch (entry->flag_state()) {
case ctos:
SET_LOCALS_INT(object->char_field(entry->f2()), 0);
break;
case btos:
SET_LOCALS_INT(object->byte_field(entry->f2()), 0);
break;
case stos:
SET_LOCALS_INT(object->short_field(entry->f2()), 0);
break;
case itos:
//.........这里部分代码省略.........
开发者ID:,项目名称:,代码行数:101,代码来源:
示例8: call_stub
// The call stub is used to call Java from C
static void call_stub(
JavaCallWrapper *call_wrapper,
intptr_t* result,
BasicType result_type,
methodOop method,
address entry_point,
intptr_t* parameters,
int parameter_words,
TRAPS) {
JavaThread *thread = (JavaThread *) THREAD;
ZeroStack *stack = thread->zero_stack();
// Make sure we have no pending exceptions
assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception");
// Set up the stack if necessary
bool stack_needs_teardown = false;
if (stack->needs_setup()) {
size_t zero_stack_size = stack->suggest_size(thread);
stack->setup(alloca(zero_stack_size), zero_stack_size);
stack_needs_teardown = true;
}
// Allocate and initialize our frame
EntryFrame *frame =
EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD);
if (!HAS_PENDING_EXCEPTION) {
// Push the frame
thread->push_zero_frame(frame);
// Make the call
Interpreter::invoke_method(method, entry_point, THREAD);
// Store the result
if (!HAS_PENDING_EXCEPTION) {
switch (result_type) {
case T_INT:
*(jint *) result = *(jint *) stack->sp();
break;
case T_LONG:
*(jlong *) result = *(jlong *) stack->sp();
break;
case T_FLOAT:
*(jfloat *) result = *(jfloat *) stack->sp();
break;
case T_DOUBLE:
*(jdouble *) result = *(jdouble *) stack->sp();
break;
case T_OBJECT:
*(oop *) result = *(oop *) stack->sp();
break;
default:
ShouldNotReachHere();
}
}
// Unwind the frame
thread->pop_zero_frame();
}
// Tear down the stack if necessary
if (stack_needs_teardown)
stack->teardown();
}
开发者ID:,项目名称:,代码行数:66,代码来源:
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