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| author | Russ Cox <rsc@swtch.com> | 2020-01-14 12:40:09 -0500 |
|---|---|---|
| committer | Russ Cox <rsc@swtch.com> | 2020-01-14 13:58:47 -0500 |
| commit | 8c573cab6819c69142389d36b978b3c683771afe (patch) | |
| tree | 8c97a0523b4b9dbddc2ad5afc49e89d9815ecbda /src/libthread/thread.c | |
| parent | 4ae529dbfe8573ae105d0d66f7f453c4f850fa1f (diff) | |
| download | plan9port-8c573cab6819c69142389d36b978b3c683771afe.tar.gz plan9port-8c573cab6819c69142389d36b978b3c683771afe.tar.bz2 plan9port-8c573cab6819c69142389d36b978b3c683771afe.zip | |
libthread: use mmap to allocate OpenBSD stacks
Should fix faults on OpenBSD.
Fixes #218.
Fixes #226.
Diffstat (limited to 'src/libthread/thread.c')
| -rw-r--r-- | src/libthread/thread.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/libthread/thread.c b/src/libthread/thread.c index d041efcc..2e654863 100644 --- a/src/libthread/thread.c +++ b/src/libthread/thread.c @@ -109,7 +109,7 @@ threadalloc(void (*fn)(void*), void *arg, uint stack) ulong z; /* allocate the task and stack together */ - t = malloc(sizeof *t+stack); + t = malloc(sizeof *t); if(t == nil) sysfatal("threadalloc malloc: %r"); memset(t, 0, sizeof *t); @@ -122,7 +122,9 @@ threadalloc(void (*fn)(void*), void *arg, uint stack) /* do a reasonable initialization */ if(stack == 0) return t; - t->stk = (uchar*)(t+1); + t->stk = _threadstkalloc(stack); + if(t->stk == nil) + sysfatal("threadalloc malloc stack: %r"); t->stksize = stack; memset(&t->context.uc, 0, sizeof t->context.uc); sigemptyset(&zero); @@ -353,6 +355,7 @@ Top: delthreadinproc(p, t); p->nthread--; /*print("nthread %d\n", p->nthread); */ + _threadstkfree(t->stk, t->stksize); free(t); } @@ -509,6 +512,8 @@ needstack(int n) _Thread *t; t = proc()->thread; + if(t->stk == nil) + return; if((char*)&t <= (char*)t->stk || (char*)&t - (char*)t->stk < 256+n){ |