blob: fa4b8f30f4e7677cd6571c64b424c2323106da25 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use container::Container;
use ptr::Ptr;
use vec;
use ops::Drop;
use libc::{c_uint, uintptr_t};
pub struct StackSegment {
buf: ~[u8],
valgrind_id: c_uint
}
impl StackSegment {
pub fn new(size: uint) -> StackSegment {
unsafe {
// Crate a block of uninitialized values
let mut stack = vec::with_capacity(size);
vec::raw::set_len(&mut stack, size);
let mut stk = StackSegment {
buf: stack,
valgrind_id: 0
};
// XXX: Using the FFI to call a C macro. Slow
stk.valgrind_id = rust_valgrind_stack_register(stk.start(), stk.end());
return stk;
}
}
/// Point to the low end of the allocated stack
pub fn start(&self) -> *uint {
vec::raw::to_ptr(self.buf) as *uint
}
/// Point one word beyond the high end of the allocated stack
pub fn end(&self) -> *uint {
vec::raw::to_ptr(self.buf).offset(self.buf.len()) as *uint
}
}
impl Drop for StackSegment {
fn finalize(&self) {
unsafe {
// XXX: Using the FFI to call a C macro. Slow
rust_valgrind_stack_deregister(self.valgrind_id);
}
}
}
pub struct StackPool(());
impl StackPool {
pub fn new() -> StackPool { StackPool(()) }
fn take_segment(&self, min_size: uint) -> StackSegment {
StackSegment::new(min_size)
}
fn give_segment(&self, _stack: StackSegment) {
}
}
extern {
fn rust_valgrind_stack_register(start: *uintptr_t, end: *uintptr_t) -> c_uint;
fn rust_valgrind_stack_deregister(id: c_uint);
}
|
