mirror of
https://github.com/golang/go
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0accc80fbb
Change-Id: I309e3df7608b9eef9339196fdc50dedf5f9439f2 Reviewed-on: https://go-review.googlesource.com/8439 Reviewed-by: David Crawshaw <crawshaw@golang.org> Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include <pthread.h>
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#include <string.h>
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#include <signal.h>
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#include "libcgo.h"
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static void *threadentry(void*);
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void (*x_cgo_inittls)(void **tlsg, void **tlsbase);
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void (*setg_gcc)(void*);
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void
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_cgo_sys_thread_start(ThreadStart *ts)
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{
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pthread_attr_t attr;
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sigset_t ign, oset;
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pthread_t p;
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size_t size;
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int err;
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sigfillset(&ign);
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pthread_sigmask(SIG_SETMASK, &ign, &oset);
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// Not sure why the memset is necessary here,
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// but without it, we get a bogus stack size
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// out of pthread_attr_getstacksize. C'est la Linux.
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memset(&attr, 0, sizeof attr);
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pthread_attr_init(&attr);
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size = 0;
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pthread_attr_getstacksize(&attr, &size);
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// Leave stacklo=0 and set stackhi=size; mstack will do the rest.
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ts->g->stackhi = size;
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err = pthread_create(&p, &attr, threadentry, ts);
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pthread_sigmask(SIG_SETMASK, &oset, nil);
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if (err != 0) {
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fatalf("pthread_create failed: %s", strerror(err));
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}
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}
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extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
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static void*
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threadentry(void *v)
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{
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ThreadStart ts;
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ts = *(ThreadStart*)v;
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free(v);
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crosscall1(ts.fn, setg_gcc, (void*)ts.g);
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return nil;
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}
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void
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x_cgo_init(G *g, void (*setg)(void*), void **tlsg, void **tlsbase)
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{
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pthread_attr_t attr;
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size_t size;
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setg_gcc = setg;
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pthread_attr_init(&attr);
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pthread_attr_getstacksize(&attr, &size);
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g->stacklo = (uintptr)&attr - size + 4096;
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pthread_attr_destroy(&attr);
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if (x_cgo_inittls) {
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x_cgo_inittls(tlsg, tlsbase);
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}
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}
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