github-repos/tinycc
1
0
Fork 0
mirror of https://github.com/mirror/tinycc.git synced 2025-03-26 12:04:59 +08:00
Code Issues Packages Projects Releases Wiki Activity

Revert "Use anonymous file instead of regular file to back mmap"

Browse Source 
This reverts commit 935d8169b8,
because two anonymous mappings would have different content,
while they must have the same one.
This commit is contained in:
Iavael 2014-01-12 09:26:41 +04:00
parent f42a02efda
commit 8e724128e8
1 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
tccrun.c
View File

@ -59,18 +59,25 @@ LIBTCCAPI int tcc_relocate(TCCState *s1, void *ptr)
return ret; return ret;
#ifdef HAVE_SELINUX #ifdef HAVE_SELINUX
{ /* Use mmap instead of malloc for 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";
int fd = mkstemp (tmpfname);
s1->mem_size = ret; s1->mem_size = ret;
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_PRIVATE|MAP_ANONYMOUS, -1, 0); MAP_SHARED, fd, 0);
if (s1->write_mem == MAP_FAILED) if (s1->write_mem == MAP_FAILED)
tcc_error("mmap not writeable"); tcc_error("/tmp not writeable");
s1->runtime_mem = mmap (NULL, ret, PROT_READ|PROT_EXEC, s1->runtime_mem = mmap (NULL, ret, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); MAP_SHARED, fd, 0);
if (s1->runtime_mem == MAP_FAILED) if (s1->runtime_mem == MAP_FAILED)
tcc_error("mmap not executable"); tcc_error("/tmp not executable");
ret = tcc_relocate_ex(s1, s1->write_mem); ret = tcc_relocate_ex(s1, s1->write_mem);
} }