compiler-rt/lib/asan/asan_mac.h

//===-- asan_mac.h ----------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// ASan-private header for asan_mac.cc
//===----------------------------------------------------------------------===//
#ifdef __APPLE__

#ifndef ASAN_MAC_H
#define ASAN_MAC_H

#include "asan_interceptors.h"

// TODO(glider): need to check if the OS X version is 10.6 or greater.
#include <dispatch/dispatch.h>
#include <mach/mach_error.h>
#include <setjmp.h>

typedef void* pthread_workqueue_t;
typedef void* pthread_workitem_handle_t;

typedef void (*dispatch_function_t)(void *block);
typedef void* (*worker_t)(void *block);
typedef int (*dispatch_async_f_f)(dispatch_queue_t dq, void *ctxt,
                                  dispatch_function_t func);
typedef int (*dispatch_sync_f_f)(dispatch_queue_t dq, void *ctxt,
                                  dispatch_function_t func);
typedef int (*dispatch_after_f_f)(dispatch_time_t when,
                                  dispatch_queue_t dq, void *ctxt,
                                  dispatch_function_t func);
typedef void (*dispatch_barrier_async_f_f)(dispatch_queue_t dq,
                                           void *ctxt,
                                           dispatch_function_t func);
typedef void (*dispatch_group_async_f_f)(dispatch_group_t group,
                                         dispatch_queue_t dq,
                                         void *ctxt, dispatch_function_t func);
typedef int (*pthread_workqueue_additem_np_f)(pthread_workqueue_t workq,
    void *(*workitem_func)(void *), void * workitem_arg,
    pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp);


// A wrapper for the ObjC blocks used to support libdispatch.
typedef struct {
  void *block;
  dispatch_function_t func;
  int parent_tid;
} asan_block_context_t;


extern "C" {

// Allocate memory for the escape island. This cannot be moved to
// mach_override, because the allocator needs to know about the ASan shadow
// mappings.
// TODO(glider): in order to place a relative jump the allocated memory should
// be within 2 Gb from the hint address.
mach_error_t __asan_allocate_island(void **ptr, size_t unused_size, void *unused_hint);
mach_error_t __asan_deallocate_island(void *ptr);

// dispatch_barrier_async_f() is not declared in <dispatch/dispatch.h>.
void dispatch_barrier_async_f(dispatch_queue_t dq,
                              void *ctxt, dispatch_function_t func);
// Neither is pthread_workqueue_additem_np().
int pthread_workqueue_additem_np(pthread_workqueue_t workq,
    void *(*workitem_func)(void *), void * workitem_arg,
    pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp);

int WRAP(dispatch_async_f)(dispatch_queue_t dq,
                           void *ctxt,
                           dispatch_function_t func);
int WRAP(dispatch_sync_f)(dispatch_queue_t dq,
                          void *ctxt,
                          dispatch_function_t func);
int WRAP(dispatch_after_f)(dispatch_time_t when,
                           dispatch_queue_t dq,
                           void *ctxt,
                           dispatch_function_t func);
void WRAP(dispatch_barrier_async_f)(dispatch_queue_t dq,
                                    void *ctxt, dispatch_function_t func);
void WRAP(dispatch_group_async_f)(dispatch_group_t group,
                                  dispatch_queue_t dq,
                                  void *ctxt, dispatch_function_t func);
int WRAP(pthread_workqueue_additem_np)(pthread_workqueue_t workq,
    void *(*workitem_func)(void *), void * workitem_arg,
    pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp);
}

#endif  // ASAN_MAC_H

#endif  // __APPLE__