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-rw-r--r--include/mimalloc-internal.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/mimalloc-internal.h b/include/mimalloc-internal.h
index 5655cd4..d8e293b 100644
--- a/include/mimalloc-internal.h
+++ b/include/mimalloc-internal.h
@@ -751,6 +751,9 @@ static inline uintptr_t _mi_thread_id(void) mi_attr_noexcept {
#if defined(__aarch64__) && defined(__APPLE__) // M1
// on macOS on the M1, slot 0 does not seem to work, so we fall back to portable C for now. See issue #354
return (uintptr_t)&_mi_heap_default;
+#elif defined(__BIONIC__) && (defined(__arm__) || defined(__aarch64__))
+ // on Android, slot 1 is the thread ID (pointer to pthread internal struct)
+ return (uintptr_t)mi_tls_slot(1);
#else
// in all our other targets, slot 0 is the pointer to the thread control block
return (uintptr_t)mi_tls_slot(0);