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f3913b5b68
bionic/libc/include
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Nick Kralevich f3913b5b68 FORTIFY_SOURCE: enhanced memcpy protections. 
Two changes:

1) Detect memory read overruns.

For example:

int main() {
  char buf[10];
  memcpy(buf, "abcde", sizeof(buf));
  sprintf("%s\n", buf);
}

because "abcde" is only 6 bytes, copying 10 bytes from it is a bug.
This particular bug will be detected at compile time.  Other similar
bugs may be detected at runtime.

2) Detect overlapping buffers on memcpy()

It is a bug to call memcpy() on buffers which overlap. For
example, the following code is buggy:

  char buf3[0x800];
  char *first_half  = &buf3[0x400];
  char *second_half = &buf3[1];
  memset(buf3, 0, sizeof(buf3));
  memcpy(first_half, second_half, 0x400);
  printf("1: %s\n", buf3);

We now detect this at compile and run time.

Change-Id: I092bd89f11f18e08e8a9dda0ca903aaea8e06d91
2012-07-12 15:38:15 -07:00
..
android libc: Add <android/api-level.h> 2010-12-06 12:05:11 +01:00
arpa Import include/arpa/telnet.h from BSD 2010-01-15 15:15:52 -08:00
net Remove the meaningless on Linux if_dl.h header. 2012-06-11 15:01:10 -07:00
netinet am b127b1f2: Merge "libc: enable IPTOS_MINCOST, fixup gethostbyaddr() proto." 2011-06-07 13:24:04 -07:00
netpacket auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
sys _FORTIFY_SOURCE: add memset / bzero support 2012-06-07 14:19:52 -07:00
alloca.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
ar.h New additions/bug fixes required/found when porting perf. 2012-03-20 12:54:55 -07:00
assert.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
byteswap.h Fixes for the ARM-specific bswap_16, bswap_32, and bswap_64. 2010-09-26 11:26:53 -07:00
ctype.h Import change from ctype.h revision 1.20 from openbsd 2010-01-15 15:57:02 -08:00
dirent.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
dlfcn.h fix prototype of dladdr 2011-09-28 12:17:34 -07:00
elf.h Eliminate duplicate constants 2012-02-29 18:43:51 -08:00
endian.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
err.h Add fts, err, and sys/queue for grep 2010-01-15 15:57:02 -08:00
errno.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
fcntl.h FORTIFY_SOURCE: Add openat, fix bug 2012-07-09 12:30:40 -07:00
features.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
fnmatch.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
fts.h Add fts, err, and sys/queue for grep 2010-01-15 15:57:02 -08:00
getopt.h libc: tag missing functions in system headers. 2010-10-09 17:56:55 +02:00
grp.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
inttypes.h Remove compiler warnings when building Bionic. 2010-06-22 17:51:41 -07:00
lastlog.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
libgen.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
limits.h Remove compiler warnings when building Bionic. 2010-06-22 17:51:41 -07:00
locale.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
malloc.h Don't mark realloc with __attribute__((malloc)) 2012-06-13 15:43:14 -07:00
memory.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
mntent.h mntent.h requires stdio.h 2010-01-15 15:57:02 -08:00
netdb.h libc: enable IPTOS_MINCOST, fixup gethostbyaddr() proto. 2011-06-02 15:28:16 -07:00
nsswitch.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
pathconf.h libc: Add missing C++ guards to <pathconf.h> 2010-09-27 17:27:14 +02:00
paths.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
poll.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
pthread.h libc: speed-up flockfile()/funlockfile() 2011-11-15 13:16:42 +01:00
pwd.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
regex.h Import regex from OpenBSD 2010-01-15 15:01:44 -08:00
resolv.h libc: remove private declarations from <time.h> and <resolv.h> 2012-01-13 14:24:08 +01:00
sched.h <sched.h>: Add sched_getcpu() and cpu_set_t 2010-12-06 13:42:54 +01:00
search.h New additions/bug fixes required/found when porting perf. 2012-03-20 12:54:55 -07:00
semaphore.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
setjmp.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
sgtty.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
sha1.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
signal.h libc: Fix the definition of SIGRTMAX 2010-12-20 15:58:06 +01:00
stdint.h libc: <stdint.h>: Don't make __STD_CONSTANT_MACROS available if only __STD_LIMIT_MACROS is defined. 2011-03-11 14:39:05 +01:00
stdio.h FORTIFY_SOURCE: add fgets support. 2012-07-09 09:57:18 -07:00
stdlib.h libc: make atoi, atol, and atoll pure functions 2012-06-14 13:57:43 -07:00
string.h FORTIFY_SOURCE: enhanced memcpy protections. 2012-07-12 15:38:15 -07:00
strings.h _FORTIFY_SOURCE: add memset / bzero support 2012-06-07 14:19:52 -07:00
syslog.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
termio.h libc: Add missing <termio.h> header 2010-06-11 14:39:39 -07:00
termios.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
time64.h libc: allow usage of time64.h from cpp code 2009-11-23 16:25:32 -05:00
time.h libc: remove private declarations from <time.h> and <resolv.h> 2012-01-13 14:24:08 +01:00
unistd.h Add faccessat to syscall list 2012-04-13 15:45:42 -07:00
util.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
utime.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00
utmp.h libc: remove C++ comments from public headers. 2010-09-27 17:35:26 +02:00
wchar.h Add wcscasecmp() and wcsncasecmp() prototypes to wchar.h. 2010-11-29 13:15:07 -08:00
wctype.h auto import from //depot/cupcake/@135843 2009-03-03 19:28:35 -08:00