NO_PREAD simulates pread() as a sequence of seek, read, seek in
compat/pread.c. The simulation is not thread-safe because another
thread could move the file offset away in the middle of pread
operation. Do not allow threading in that case.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
builtin/index-pack.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index d4685c5..807ee56 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -39,6 +39,11 @@ struct base_data {
int ofs_first, ofs_last;
};
+#if !defined(NO_PTHREADS) && defined(NO_PREAD)
+/* NO_PREAD uses compat/pread.c, which is not thread-safe. Disable threading. */
+#define NO_PTHREADS
+#endif
+
struct thread_local {
#ifndef NO_PTHREADS
pthread_t thread;
--
1.7.8.36.g69ee2
--
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