add aarch64/bits/mman.h with PROT_BTI from linux v5.8

[musl] / ldso / dynlink.c

diff --git a/ldso/dynlink.c b/ldso/dynlink.c
index 502e52c..6b868c8 100644 (file)
--- a/ldso/dynlink.c
+++ b/ldso/dynlink.c
@@ -20,9 +20,15 @@
 #include <semaphore.h>
 #include <sys/membarrier.h>
 #include "pthread_impl.h"
+#include "fork_impl.h"
 #include "libc.h"
 #include "dynlink.h"
 
+#define malloc __libc_malloc
+#define calloc __libc_calloc
+#define realloc __libc_realloc
+#define free __libc_free
+
 static void error(const char *, ...);
 
 #define MAXP2(a,b) (-(-(a)&-(b)))
@@ -1421,6 +1427,17 @@ void __libc_exit_fini()
        }
 }
 
+void __ldso_atfork(int who)
+{
+       if (who<0) {
+               pthread_rwlock_wrlock(&lock);
+               pthread_mutex_lock(&init_fini_lock);
+       } else {
+               pthread_mutex_unlock(&init_fini_lock);
+               pthread_rwlock_unlock(&lock);
+       }
+}
+
 static struct dso **queue_ctors(struct dso *dso)
 {
        size_t cnt, qpos, spos, i;
@@ -1479,6 +1496,13 @@ static struct dso **queue_ctors(struct dso *dso)
        }
        queue[qpos] = 0;
        for (i=0; i<qpos; i++) queue[i]->mark = 0;
+       for (i=0; i<qpos; i++)
+               if (queue[i]->ctor_visitor && queue[i]->ctor_visitor->tid < 0) {
+                       error("State of %s is inconsistent due to multithreaded fork\n",
+                               queue[i]->name);
+                       free(queue);
+                       if (runtime) longjmp(*rtld_fail, 1);
+               }
 
        return queue;
 }