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Avoid clobbering errno

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Justine Tunney 2024-08-15 23:54:14 -07:00
parent 0a79c6961f
commit 1671283f1a
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1 changed files with 3 additions and 0 deletions
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3
third_party/dlmalloc/threaded.inc vendored
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@ -24,6 +24,7 @@
#include "libc/runtime/runtime.h" #include "libc/runtime/runtime.h"
#include "libc/thread/thread.h" #include "libc/thread/thread.h"
#include "libc/thread/threads.h" #include "libc/thread/threads.h"
#include "libc/errno.h"
#include "third_party/dlmalloc/dlmalloc.h" #include "third_party/dlmalloc/dlmalloc.h"
#if !FOOTERS || !MSPACES #if !FOOTERS || !MSPACES
@ -102,8 +103,10 @@ static mstate get_arena(void) {
if (n == 50) if (n == 50)
n = 0; n = 0;
if (!n) { if (!n) {
int e = errno;
i = sched_getcpu(); i = sched_getcpu();
if (i == -1) { if (i == -1) {
errno = e;
i = atomic_fetch_add_explicit(&assign, 1, memory_order_relaxed); i = atomic_fetch_add_explicit(&assign, 1, memory_order_relaxed);
i %= g_cpucount; i %= g_cpucount;
} }