javaCalls.hpp (original) (raw)

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rev 12560 : imported patch call_args

@@ -1,7 +1,7 @@ /*

- Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.

- Copyright (c) 1997, 2017, 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.

@@ -79,30 +79,47 @@ enum Constants { _default_size = 8 // Must be at least # of arguments in JavaCalls methods };

intptr_t _value_buffer [_default_size + 1];

bool _is_oop_buffer[_default_size + 1];

u_char _value_state_buffer[_default_size + 1];

intptr_t* _value;

bool* _is_oop;

u_char* _value_state; int _size; int _max_size; bool _start_at_zero; // Support late setting of receiver JVMCI_ONLY(nmethod* _alternative_target;) // Nmethod that should be called instead of normal target

void initialize() { // Starts at first element to support set_receiver. _value = &_value_buffer[1];

_is_oop = &_is_oop_buffer[1];

_value_state = &_value_state_buffer[1];

_max_size = _default_size; _size = 0; _start_at_zero = false; JVMCI_ONLY(_alternative_target = NULL;)

}

// Helper for push_oop and the like. The value argument is a
// "handle" that refers to an oop. We record the address of the
// handle rather than the designated oop. The handle is later
// resolved to the oop by parameters(). This delays the exposure of
// naked oops until it is GC-safe.
template
inline int push_oop_impl(T handle, int size) {
// JNITypes::put_obj expects an oop value, so we play fast and
// loose with the type system. The cast from handle type to oop
// must use a C-style cast. In a product build it performs a
// reinterpret_cast. In a debug build (more accurately, in a
// CHECK_UNHANDLED_OOPS build) it performs a static_cast, invoking
// the debug-only oop class's conversion from void* constructor.
JNITypes::put_obj((oop)handle, _value, size); // Updates size.
return size; // Return the updated size.
}
public: JavaCallArguments() { initialize(); }

JavaCallArguments(Handle receiver) { initialize();

@@ -110,14 +127,14 @@ }

JavaCallArguments(int max_size) { if (max_size > _default_size) { _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);

 _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);

 _value_state = NEW_RESOURCE_ARRAY(u_char, max_size + 1);

 // Reserve room for potential receiver in value and is_oop

```
 _value++; _is_oop++;
```

 // Reserve room for potential receiver in value and state

 _value++; _value_state++;

 _max_size = max_size;
 _size = 0;
 _start_at_zero = false;
 JVMCI_ONLY(_alternative_target = NULL;)

@@ -134,41 +151,65 @@ nmethod* alternative_target() { return _alternative_target; } #endif

inline void push_oop(Handle h) { _is_oop[_size] = true;

                          JNITypes::put_obj((oop)h.raw_value(), _value, _size); }

static const uint value_state_primitive = 0;
static const uint value_state_oop = 1;
static const uint value_state_handle = 2;
static const uint value_state_jobject = 3;
static const uint value_state_limit = 4;
inline void push_oop(Handle h) {
_value_state[_size] = value_state_handle;
_size = push_oop_impl(h.raw_value(), _size);
}
inline void push_jobject(jobject h) {
_value_state[_size] = value_state_jobject;
_size = push_oop_impl(h, _size);
}

inline void push_int(int i) { _is_oop[_size] = false;

                          JNITypes::put_int(i, _value, _size); }

inline void push_int(int i) {
_value_state[_size] = value_state_primitive;
JNITypes::put_int(i, _value, _size);
}

inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;

                          JNITypes::put_double(d, _value, _size); }

inline void push_double(double d) {
_value_state[_size] = value_state_primitive;
_value_state[_size + 1] = value_state_primitive;
JNITypes::put_double(d, _value, _size);
}

inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false;

                          JNITypes::put_long(l, _value, _size); }

inline void push_long(jlong l) {
_value_state[_size] = value_state_primitive;
_value_state[_size + 1] = value_state_primitive;
JNITypes::put_long(l, _value, _size);
}

inline void push_float(float f) { _is_oop[_size] = false;

                          JNITypes::put_float(f, _value, _size); }

inline void push_float(float f) {
_value_state[_size] = value_state_primitive;
JNITypes::put_float(f, _value, _size);
}

// receiver Handle receiver() { assert(_size > 0, "must at least be one argument");

assert(_is_oop[0], "first argument must be an oop");

assert(_value_state[0] == value_state_handle,
```
      "first argument must be an oop");
```
assert(_value[0] != 0, "receiver must be not-null"); return Handle((oop*)_value[0], false); }

void set_receiver(Handle h) { assert(_start_at_zero == false, "can only be called once"); _start_at_zero = true;

_is_oop--;

_value_state--; _value--; _size++;

_is_oop[0] = true;
_value[0] = (intptr_t)h.raw_value();

_value_state[0] = value_state_handle;
push_oop_impl(h.raw_value(), 0);

}

// Converts all Handles to oops, and returns a reference to parameter vector intptr_t* parameters() ; int size_of_parameters() const { return _size; }

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