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Reduce pthread memory usage

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Justine Tunney 2024-12-24 10:30:59 -08:00
parent ec2db4e40e
commit 93e22c581f
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GPG key ID: BE714B4575D6E328
6 changed files with 75 additions and 58 deletions
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8
libc/runtime/clone.c
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@ -535,7 +535,7 @@ static errno_t CloneSilicon(int (*fn)(void *, int), char *stk, size_t stksz,
wt = (struct CloneArgs *)sp;
sp = AlignStack(sp, stk, stksz, 16);
tid = atomic_fetch_add_explicit(&tids, 1, memory_order_acq_rel);
wt->this = tid = (tid & (kMaxThreadIds - 1)) + kMinThreadId;
wt->this = tid = (tid % kMaxThreadIds) + kMinThreadId;
wt->ctid = flags & CLONE_CHILD_SETTID ? ctid : &wt->tid;
wt->ztid = flags & CLONE_CHILD_CLEARTID ? ctid : &wt->tid;
wt->tls = flags & CLONE_SETTLS ? tls : 0;
@ -550,9 +550,9 @@ static errno_t CloneSilicon(int (*fn)(void *, int), char *stk, size_t stksz,
unassert(!__syslib->__pthread_attr_init(attr));
unassert(!__syslib->__pthread_attr_setguardsize(attr, 0));
unassert(!__syslib->__pthread_attr_setstacksize(attr, babystack));
if (!(res = __syslib->__pthread_create(&th, attr, SiliconThreadMain, wt)) &&
(flags & CLONE_PARENT_SETTID)) {
*ptid = tid;
if (!(res = __syslib->__pthread_create(&th, attr, SiliconThreadMain, wt))) {
if (flags & CLONE_PARENT_SETTID)
*ptid = tid;
if (flags & CLONE_SETTLS) {
struct CosmoTib *tib = tls;
atomic_store_explicit(&tib[-1].tib_syshand, th, memory_order_release);