From 0e578018d47b31691a415a71337272544928b584 Mon Sep 17 00:00:00 2001
From: Ivan Maidanski <ivmai@mail.ru>
Date: Sat, 24 Jul 2021 00:31:51 +0300
Subject: Eliminate 'accessing GC_dont_gc without lock' in GC_init code defect
 FP

* allchblk.c (GC_allochblk): Add assertion that GC lock is held on
entrance.
* new_hblk.c (GC_new_hblk): Likewise.
* pthread_support.c (GC_unregister_my_thread_inner): Likewise.
* misc.c [LINT2] (GC_init): Call GC_disable() instead of setting
GC_dont_gc directly.
---
 allchblk.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'allchblk.c')

diff --git a/allchblk.c b/allchblk.c
index 235310d8..6c3a1a85 100644
--- a/allchblk.c
+++ b/allchblk.c
@@ -683,6 +683,7 @@ GC_allochblk(size_t sz, int kind, unsigned flags/* IGNORE_OFF_PAGE or 0 */)
     int split_limit; /* Highest index of free list whose blocks we      */
                      /* split.                                          */
 
+    GC_ASSERT(I_HOLD_LOCK());
     GC_ASSERT((sz & (GRANULE_BYTES - 1)) == 0);
     blocks = OBJ_SZ_TO_BLOCKS_CHECKED(sz);
     if ((signed_word)(blocks * HBLKSIZE) < 0) {
-- 
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