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name the arc4random structure mappings

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Change-Id: I6e150e526f6ceee31aa9bd219fa45317d5a729cb
This commit is contained in:
Daniel Micay 2015-08-01 22:25:42 -04:00
parent 7e919daeaa
commit 516fcb28f2
1 changed files with 8 additions and 0 deletions
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8
libc/upstream-openbsd/android/include/arc4random.h
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@ -27,6 +27,8 @@
#include <pthread.h>
#include <signal.h>
#include "private/bionic_prctl.h"
// Android gets these from "thread_private.h".
#include "thread_private.h"
//static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
@ -76,12 +78,18 @@ _rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
return (-1);
prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, *rsp, sizeof(**rsp),
"arc4random _rs structure");
if ((*rsxp = mmap(NULL, sizeof(**rsxp), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
munmap(*rsxp, sizeof(**rsxp));
return (-1);
}
prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, *rsxp, sizeof(**rsxp),
"arc4random _rsx structure");
_ARC4_ATFORK(_rs_forkhandler);
return (0);
}