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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#undef nil
#define nil ((void*)0)
#define nelem(x) (sizeof(x)/sizeof((x)[0]))
typedef uint32_t uint32;
typedef uint64_t uint64;
typedef uintptr_t uintptr;
/*
* The beginning of the per-goroutine structure,
* as defined in ../pkg/runtime/runtime.h.
* Just enough to edit these two fields.
*/
typedef struct G G;
struct G
{
uintptr stacklo;
uintptr stackhi;
};
/*
* Arguments to the _cgo_thread_start call.
* Also known to ../pkg/runtime/runtime.h.
*/
typedef struct ThreadStart ThreadStart;
struct ThreadStart
{
G *g;
uintptr *tls;
void (*fn)(void);
};
/*
* Called by 5c/6c/8c world.
* Makes a local copy of the ThreadStart and
* calls _cgo_sys_thread_start(ts).
*/
extern void (*_cgo_thread_start)(ThreadStart *ts);
/*
* Creates a new operating system thread without updating any Go state
* (OS dependent).
*/
extern void (*_cgo_sys_thread_create)(void* (*func)(void*), void* arg);
/*
* Indicates whether a dummy pthread per-thread variable is allocated.
*/
extern uintptr_t *_cgo_pthread_key_created;
/*
* Creates the new operating system thread (OS, arch dependent).
*/
void _cgo_sys_thread_start(ThreadStart *ts);
/*
* Waits for the Go runtime to be initialized (OS dependent).
* If runtime.SetCgoTraceback is used to set a context function,
* calls the context function and returns the context value.
*/
uintptr_t _cgo_wait_runtime_init_done(void);
/*
* Get the low and high boundaries of the stack.
*/
void x_cgo_getstackbound(uintptr bounds[2]);
/*
* Prints error then calls abort. For linux and android.
*/
void fatalf(const char* format, ...);
/*
* Registers the current mach thread port for EXC_BAD_ACCESS processing.
*/
void darwin_arm_init_thread_exception_port(void);
/*
* Starts a mach message server processing EXC_BAD_ACCESS.
*/
void darwin_arm_init_mach_exception_handler(void);
/*
* The cgo context function. See runtime.SetCgoTraceback.
*/
struct context_arg {
uintptr_t Context;
};
extern void (*(_cgo_get_context_function(void)))(struct context_arg*);
/*
* The argument for the cgo traceback callback. See runtime.SetCgoTraceback.
*/
struct cgoTracebackArg {
uintptr_t Context;
uintptr_t SigContext;
uintptr_t* Buf;
uintptr_t Max;
};
/*
* TSAN support. This is only useful when building with
* CGO_CFLAGS="-fsanitize=thread" CGO_LDFLAGS="-fsanitize=thread" go install
*/
#undef CGO_TSAN
#if defined(__has_feature)
# if __has_feature(thread_sanitizer)
# define CGO_TSAN
# endif
#elif defined(__SANITIZE_THREAD__)
# define CGO_TSAN
#endif
#ifdef CGO_TSAN
// These must match the definitions in yesTsanProlog in cmd/cgo/out.go.
// In general we should call _cgo_tsan_acquire when we enter C code,
// and call _cgo_tsan_release when we return to Go code.
// This is only necessary when calling code that might be instrumented
// by TSAN, which mostly means system library calls that TSAN intercepts.
// See the comment in cmd/cgo/out.go for more details.
long long _cgo_sync __attribute__ ((common));
extern void __tsan_acquire(void*);
extern void __tsan_release(void*);
__attribute__ ((unused))
static void _cgo_tsan_acquire() {
__tsan_acquire(&_cgo_sync);
}
__attribute__ ((unused))
static void _cgo_tsan_release() {
__tsan_release(&_cgo_sync);
}
#else // !defined(CGO_TSAN)
#define _cgo_tsan_acquire()
#define _cgo_tsan_release()
#endif // !defined(CGO_TSAN)