mirror of
https://github.com/golang/go
synced 2024-10-04 02:31:22 -06:00
15b76ad94b
Commit to stack copying for stack growth. We're carrying around a surprising amount of cruft from older schemes. I am confident that precise stack scans and stack copying are here to stay. Delete fallback code for when precise stack info is disabled. Delete fallback code for when copying stacks is disabled. Delete fallback code for when StackCopyAlways is disabled. Delete Stktop chain - there is only one stack segment now. Delete M.moreargp, M.moreargsize, M.moreframesize, M.cret. Delete G.writenbuf (unrelated, just dead). Delete runtime.lessstack, runtime.oldstack. Delete many amd64 morestack variants. Delete initialization of morestack frame/arg sizes (shortens split prologue!). Replace G's stackguard/stackbase/stack0/stacksize/ syscallstack/syscallguard/forkstackguard with simple stack bounds (lo, hi). Update liblink, runtime/cgo for adjustments to G. LGTM=khr R=khr, bradfitz CC=golang-codereviews, iant, r https://golang.org/cl/137410043
67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
// Copyright 2013 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 <sys/types.h>
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#include <pthread.h>
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#include <signal.h>
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#include <string.h>
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#include "libcgo.h"
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static void *threadentry(void*);
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static void (*setg_gcc)(void*);
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void
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x_cgo_init(G *g, void (*setg)(void*))
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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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}
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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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pthread_attr_init(&attr);
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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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fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
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abort();
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}
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}
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extern void crosscall_arm1(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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crosscall_arm1(ts.fn, setg_gcc, (void*)ts.g);
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return nil;
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}
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