From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../gcc.c-torture/execute/builtins/snprintf-chk.c | 220 +++++++++++++++++++++ 1 file changed, 220 insertions(+) create mode 100644 gcc/testsuite/gcc.c-torture/execute/builtins/snprintf-chk.c (limited to 'gcc/testsuite/gcc.c-torture/execute/builtins/snprintf-chk.c') diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/snprintf-chk.c b/gcc/testsuite/gcc.c-torture/execute/builtins/snprintf-chk.c new file mode 100644 index 000000000..b244f8925 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/builtins/snprintf-chk.c @@ -0,0 +1,220 @@ +/* Copyright (C) 2004, 2005 Free Software Foundation. + + Ensure builtin __snprintf_chk performs correctly. */ + +extern void abort (void); +typedef __SIZE_TYPE__ size_t; +extern size_t strlen(const char *); +extern void *memcpy (void *, const void *, size_t); +extern char *strcpy (char *, const char *); +extern int memcmp (const void *, const void *, size_t); +extern void *memset (void *, int, size_t); +extern int sprintf (char *, const char *, ...); +extern int snprintf (char *, size_t, const char *, ...); + +#include "chk.h" + +const char s1[] = "123"; +char p[32] = ""; +char *s2 = "defg"; +char *s3 = "FGH"; +char *s4; +size_t l1 = 1; +static char buffer[32]; +char * volatile ptr = "barf"; /* prevent constant propagation to happen when whole program assumptions are made. */ + +void +__attribute__((noinline)) +test1 (void) +{ + chk_calls = 0; + /* snprintf_disallowed = 1; */ + + memset (buffer, 'A', 32); + snprintf (buffer, 4, "foo"); + if (memcmp (buffer, "foo", 4) || buffer[4] != 'A') + abort (); + + memset (buffer, 'A', 32); + if (snprintf (buffer, 4, "foo bar") != 7) + abort (); + if (memcmp (buffer, "foo", 4) || buffer[4] != 'A') + abort (); + + memset (buffer, 'A', 32); + snprintf (buffer, 32, "%s", "bar"); + if (memcmp (buffer, "bar", 4) || buffer[4] != 'A') + abort (); + + memset (buffer, 'A', 32); + if (snprintf (buffer, 21, "%s", "bar") != 3) + abort (); + if (memcmp (buffer, "bar", 4) || buffer[4] != 'A') + abort (); + + snprintf_disallowed = 0; + + memset (buffer, 'A', 32); + if (snprintf (buffer, 4, "%d%d%d", (int) l1, (int) l1 + 1, (int) l1 + 12) + != 4) + abort (); + if (memcmp (buffer, "121", 4) || buffer[4] != 'A') + abort (); + + memset (buffer, 'A', 32); + if (snprintf (buffer, 32, "%d%d%d", (int) l1, (int) l1 + 1, (int) l1 + 12) + != 4) + abort (); + if (memcmp (buffer, "1213", 5) || buffer[5] != 'A') + abort (); + + if (chk_calls) + abort (); + + memset (buffer, 'A', 32); + snprintf (buffer, strlen (ptr) + 1, "%s", ptr); + if (memcmp (buffer, "barf", 5) || buffer[5] != 'A') + abort (); + + memset (buffer, 'A', 32); + snprintf (buffer, l1 + 31, "%d - %c", (int) l1 + 27, *ptr); + if (memcmp (buffer, "28 - b\0AAAAA", 12)) + abort (); + + if (chk_calls != 2) + abort (); + chk_calls = 0; + + memset (s4, 'A', 32); + snprintf (s4, l1 + 6, "%d - %c", (int) l1 - 17, ptr[1]); + if (memcmp (s4, "-16 - \0AAA", 10)) + abort (); + if (chk_calls) + abort (); +} + +/* Test whether compile time checking is done where it should + and so is runtime object size checking. */ +void +__attribute__((noinline)) +test2 (void) +{ + struct A { char buf1[10]; char buf2[10]; } a; + char *r = l1 == 1 ? &a.buf1[5] : &a.buf2[4]; + char buf3[20]; + int i; + + /* The following calls should do runtime checking + - length is not known, but destination is. */ + chk_calls = 0; + snprintf (a.buf1 + 2, l1, "%s", s3 + 3); + snprintf (r, l1 + 4, "%s%c", s3 + 3, s3[3]); + r = l1 == 1 ? __builtin_alloca (4) : &a.buf2[7]; + snprintf (r, strlen (s2) - 2, "%c %s", s2[2], s2 + 4); + snprintf (r + 2, l1, s3 + 3); + r = buf3; + for (i = 0; i < 4; ++i) + { + if (i == l1 - 1) + r = &a.buf1[1]; + else if (i == l1) + r = &a.buf2[7]; + else if (i == l1 + 1) + r = &buf3[5]; + else if (i == l1 + 2) + r = &a.buf1[9]; + } + snprintf (r, l1, s2 + 4); + if (chk_calls != 5) + abort (); + + /* Following have known destination and known source length, + so if optimizing certainly shouldn't result in the checking + variants. */ + chk_calls = 0; + /* snprintf_disallowed = 1; */ + snprintf (a.buf1 + 2, 4, ""); + snprintf (r, 1, "a"); + r = l1 == 1 ? __builtin_alloca (4) : &a.buf2[7]; + snprintf (r, 3, "%s", s1 + 1); + r = buf3; + for (i = 0; i < 4; ++i) + { + if (i == l1 - 1) + r = &a.buf1[1]; + else if (i == l1) + r = &a.buf2[7]; + else if (i == l1 + 1) + r = &buf3[5]; + else if (i == l1 + 2) + r = &a.buf1[9]; + } + snprintf (r, 1, "%s", ""); + snprintf (r, 0, "%s", ""); + snprintf_disallowed = 0; + /* Unknown destination and source, no checking. */ + snprintf (s4, l1 + 31, "%s %d", s3, 0); + if (chk_calls) + abort (); +} + +/* Test whether runtime and/or compile time checking catches + buffer overflows. */ +void +__attribute__((noinline)) +test3 (void) +{ + struct A { char buf1[10]; char buf2[10]; } a; + char buf3[20]; + + chk_fail_allowed = 1; + /* Runtime checks. */ + if (__builtin_setjmp (chk_fail_buf) == 0) + { + snprintf (&a.buf2[9], l1 + 1, "%c%s", s2[3], s2 + 4); + abort (); + } + if (__builtin_setjmp (chk_fail_buf) == 0) + { + snprintf (&a.buf2[7], l1 + 30, "%s%c", s3 + strlen (s3) - 2, *s3); + abort (); + } + if (__builtin_setjmp (chk_fail_buf) == 0) + { + snprintf (&a.buf2[7], l1 + 3, "%d", (int) l1 + 9999); + abort (); + } + /* This should be detectable at compile time already. */ + if (__builtin_setjmp (chk_fail_buf) == 0) + { + snprintf (&buf3[19], 2, "a"); + abort (); + } + if (__builtin_setjmp (chk_fail_buf) == 0) + { + snprintf (&buf3[17], 4, "a"); + abort (); + } + if (__builtin_setjmp (chk_fail_buf) == 0) + { + snprintf (&buf3[17], 4, "%s", "abc"); + abort (); + } + chk_fail_allowed = 0; +} + +void +main_test (void) +{ +#ifndef __OPTIMIZE__ + /* Object size checking is only intended for -O[s123]. */ + return; +#endif + __asm ("" : "=r" (s2) : "0" (s2)); + __asm ("" : "=r" (s3) : "0" (s3)); + __asm ("" : "=r" (l1) : "0" (l1)); + s4 = p; + test1 (); + test2 (); + test3 (); +} -- cgit v1.2.3