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selinux: correct ftruncate, fix bus error in tcc -run

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Henry Kroll III 2010-10-27 03:44:00 -07:00 • committed by Henry K
parent 14673d0c49
commit fb498eb925
1 changed files with 3 additions and 2 deletions
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5
tccrun.c
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@ -38,12 +38,13 @@ int tcc_relocate(TCCState *s1)
{ {
int ret; int ret;
#ifdef HAVE_SELINUX #ifdef HAVE_SELINUX
/* Use mmap instead of malloc for Selinux
Ref http://www.gnu.org/s/libc/manual/html_node/File-Size.html */
char tmpfname[] = "/tmp/.tccrunXXXXXX"; char tmpfname[] = "/tmp/.tccrunXXXXXX";
int fd = mkstemp (tmpfname); int fd = mkstemp (tmpfname);
unlink (tmpfname); ftruncate (fd, 1000);
if ((ret= tcc_relocate_ex(s1,NULL)) < 0)return -1; if ((ret= tcc_relocate_ex(s1,NULL)) < 0)return -1;
s1->mem_size=ret; s1->mem_size=ret;
/* Use mmap instead of malloc for Selinux */ unlink (tmpfname); ftruncate (fd, s1->mem_size);
s1->write_mem = mmap (NULL, ret, PROT_READ|PROT_WRITE, s1->write_mem = mmap (NULL, ret, PROT_READ|PROT_WRITE,
MAP_SHARED, fd, 0); MAP_SHARED, fd, 0);
if(s1->write_mem == MAP_FAILED){ if(s1->write_mem == MAP_FAILED){