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libthread: run first thread in proc on system stack

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For pthread systems that are fussy about which stack is used,
this makes sure that threadmain runs on a system stack.
If you only use proccreate (never threadcreate), all threads run
on system stacks.
This commit is contained in:
Russ Cox 2020-01-08 22:47:51 -05:00
parent e0c4896ed4
commit 0158bceec7
4 changed files with 55 additions and 17 deletions
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4
src/libthread/test/tspawnloop.c
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@ -8,7 +8,7 @@ execproc(void *v)
int i, fd[3];
char buf[100], *args[3];
i = (int)v;
i = (int)(uintptr)v;
sprint(buf, "%d", i);
fd[0] = dup(0, -1);
fd[1] = dup(1, -1);
@ -33,7 +33,7 @@ threadmain(int argc, char **argv)
c = threadwaitchan();
for(i=0;; i++){
proccreate(execproc, (void*)i, 16384);
proccreate(execproc, (void*)(uintptr)i, 16384);
w = recvp(c);
if(w == nil)
sysfatal("exec/recvp failed: %r");