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Always initialize thread local storage

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We had previously not enabled TLS in MODE=tiny in order to keep the
smallest example programs (e.g. life.com) just 16kb in size. But it
was error prone doing that, so now we just always enable it because
this change uses hacks to ensure it won't increase life.com's size.

This change also fixes a bug on NetBSD, where signal handlers would
break thread local storage if SA_SIGINFO was being used. This looks
like it might be a bug in NetBSD, but it's got a simple workaround.
This commit is contained in:
Justine Tunney 2022-07-18 22:26:11 -07:00
parent 057e8f5b54
commit 69f4152f38
33 changed files with 174 additions and 123 deletions
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5
third_party/dlmalloc/locks.inc vendored
View file

@ -1,4 +1,5 @@
// clang-format off
#include "libc/calls/calls.h"
#include "libc/nexgen32e/threaded.h"
/* --------------------------- Lock preliminaries ------------------------ */
@ -94,7 +95,7 @@ FORCEINLINE void x86_clear_lock(int* sl) {
/* Plain spin locks use single word (embedded in malloc_states) */
static dontinline int spin_acquire_lock(int *sl) {
while (*(volatile int *)sl != 0 || CAS_LOCK(sl)) {
__builtin_ia32_pause();
sched_yield();
}
return 0;
}
@ -154,7 +155,7 @@ FORCEINLINE int recursive_acquire_lock(MLOCK_T *lk) {
++lk->c;
return 0;
}
__builtin_ia32_pause();
sched_yield();
}
}