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use Rust types for Valgrind, and use u32 for stack IDs

This commit is contained in:
edef 2015-04-15 22:22:02 -04:00
parent c19fc4625a
commit 904da1a1c8
2 changed files with 12 additions and 6 deletions
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11
src/os.rs
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@ -7,11 +7,13 @@ use self::libc::{c_void, size_t};
use core::ptr;
use stack;
#[allow(non_camel_case_types)]
type stack_id_t = u32;
extern "C" {
#[link_name = "lwt_stack_register"]
fn stack_register(start: *const c_void, end: *const c_void) -> libc::c_uint;
fn stack_register(start: *const u8, end: *const u8) -> stack_id_t;
#[link_name = "lwt_stack_deregister"]
fn stack_deregister(id: libc::c_uint);
fn stack_deregister(id: stack_id_t);
}
#[allow(raw_pointer_derive)]
@ -19,7 +21,7 @@ extern "C" {
pub struct Stack {
ptr: *mut u8,
len: usize,
valgrind_id: libc::c_uint
valgrind_id: stack_id_t
}
pub struct StackSource;
@ -67,7 +69,8 @@ impl Stack {
len, IoError::last_os_error())
}
let valgrind_id = stack_register(ptr.offset(len as isize), ptr);
let valgrind_id = stack_register(ptr.offset(len as isize) as *const _,
ptr as *const _);
Stack { ptr: ptr as *mut u8, len: len, valgrind_id: valgrind_id }
};

7
src/platform.c
View File

@ -1,3 +1,4 @@
#include <stdint.h>
#include "valgrind/valgrind.h"
// In order for Valgrind to keep track of stack overflows and such, it needs
@ -5,14 +6,16 @@
// macros. Calling out to un-inlineable C code for this is pointlessly slow,
// but that's the way it is for now.
typedef uint32_t valgrind_stack_id_t;
// Register a stack with Valgrind. start < end. Returns an integer ID that can
// be used to deregister the stack when it's deallocated.
unsigned int lwt_stack_register(const void *start, const void *end) {
valgrind_stack_id_t lwt_stack_register(const void *start, const void *end) {
return VALGRIND_STACK_REGISTER(start, end);
}
// Deregister a stack from Valgrind. Takes the integer ID that was returned
// on registration.
void lwt_stack_deregister(unsigned int id) {
void lwt_stack_deregister(valgrind_stack_id_t id) {
VALGRIND_STACK_DEREGISTER(id);
}