//go:build unix

#include "libcgo.h"

#include <stdlib.h>

/* Stub for calling setenv */
void
x_cgo_setenv(char **arg)
{
	_cgo_tsan_acquire();
	setenv(arg[0], arg[1], 1);
	_cgo_tsan_release();
}

/* Stub for calling unsetenv */
void
x_cgo_unsetenv(char **arg)
{
	_cgo_tsan_acquire();
	unsetenv(arg[0]);
	_cgo_tsan_release();

	void *p;

	_cgo_tsan_acquire();
	p = mmap(addr, length, prot, flags, fd, offset);
	_cgo_tsan_release();
	if (p == MAP_FAILED) {
		/* This is what the Go code expects on failure.  */
		return (uintptr_t)errno;
	}
	return (uintptr_t)p;
}

void
x_cgo_munmap(void *addr, uintptr_t length) {
	int r;

	_cgo_tsan_acquire();
	r = munmap(addr, length);
	_cgo_tsan_release();

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()

	addr = pthread_get_stackaddr_np(p); // high address (!)
	size = pthread_get_stacksize_np(p);

	// bounds points into the Go stack. TSAN can't see the synchronization
	// in Go around stack reuse.
	_cgo_tsan_acquire();
	bounds[0] = (uintptr)addr - size;
	bounds[1] = (uintptr)addr;
	_cgo_tsan_release();

	}
}

extern void crosscall_ppc64(void (*fn)(void), void *g);

static void*
threadentry(void *v)
{
	ThreadStart ts;

	ts = *(ThreadStart*)v;
	_cgo_tsan_acquire();
	free(v);
	_cgo_tsan_release();

	// Save g for this thread in C TLS
	setg_gcc((void*)ts.g);

	crosscall_ppc64(ts.fn, (void*)ts.g);
	return nil;

	}
}

extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
static void*
threadentry(void *v)
{
	ThreadStart ts;

	ts = *(ThreadStart*)v;
	_cgo_tsan_acquire();
	free(v);
	_cgo_tsan_release();

	crosscall1(ts.fn, setg_gcc, (void*)ts.g);
	return nil;

#include "libcgo.h"

/* Stub for creating a new thread */
void
x_cgo_thread_start(ThreadStart *arg)
{
	ThreadStart *ts;

	/* Make our own copy that can persist after we return. */
	_cgo_tsan_acquire();
	ts = malloc(sizeof *ts);
	_cgo_tsan_release();
	if(ts == nil) {
		fprintf(stderr, "runtime/cgo: out of memory in thread_start\n");
		abort();
	}
	*ts = *arg;

	addr = __builtin_frame_address(0) + 4096 - size;
#endif
	pthread_attr_destroy(&attr);

	// bounds points into the Go stack. TSAN can't see the synchronization
	// in Go around stack reuse.
	_cgo_tsan_acquire();
	bounds[0] = (uintptr)addr;
	bounds[1] = (uintptr)addr + size;
	_cgo_tsan_release();

	}
}

extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
static void*
threadentry(void *v)
{
	ThreadStart ts;

	ts = *(ThreadStart*)v;
	_cgo_tsan_acquire();
	free(v);
	_cgo_tsan_release();

	crosscall1(ts.fn, setg_gcc, (void*)ts.g);
	return nil;

} go_sigaction_t;

int32_t
x_cgo_sigaction(intptr_t signum, const go_sigaction_t *goact, go_sigaction_t *oldgoact) {
	int32_t ret;
	struct sigaction act;
	struct sigaction oldact;
	size_t i;

	_cgo_tsan_acquire();

	memset(&act, 0, sizeof act);
	memset(&oldact, 0, sizeof oldact);

	if (goact) {
		if (goact->flags & SA_SIGINFO) {
			act.sa_sigaction = (void(*)(int, siginfo_t*, void*))(goact->handler);
		} else {