Bug#325050: gcc-4.0: [4.0 regression] GCC 4.0 mis-compiles code leading to segfault
Package: gcc-4.0
Version: 4.0.1-5
Severity: normal
Hello,
Looking into Debian bug #324902, I found that it was due to an optimization
bug in GCC 4.0. I isolated a test case which is attached as "test.c". The
attached test.i and test.s files result from the command
gcc-4.0 -Wall -pedantic -O1 -save-temps test.c
The command produces no warning output.
Compiling with gcc-4.0 -O0 or with gcc-3.4 at any optimization level
yields the expected output, "did we get here?". Compiling with gcc-4.0
at -O1 or higher yields a segfault. I have tested this only on i386.
To summarize, the problem appears to depend on a combination of two
things:
- the char * and unsigned int variables being part of a struct
- the char * variable being assigned to with a character literal twice
The segfault happens because somehow the test "s.name[s.len] != '\0'"
returns true (even though this doesn't make any sense), so an attempt is
made to change an element of the string literal.
Please let me know if you need any more information. For what it's
worth this is quite an annoying bug because it breaks code typically
generated by cfortran (a header file acting as a C <-> FORTRAN bridge).
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'stable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.8-2-386
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Versions of packages gcc-4.0 depends on:
ii binutils 2.16.1-2 The GNU assembler, linker and bina
ii cpp-4.0 4.0.1-5 The GNU C preprocessor
ii gcc-4.0-base 4.0.1-5 The GNU Compiler Collection (base
ii libc6 2.3.5-4 GNU C Library: Shared libraries an
ii libgcc1 1:4.0.1-5 GCC support library
Versions of packages gcc-4.0 recommends:
ii libc6-dev 2.3.5-4 GNU C Library: Development Librari
pn libmudflap0-dev <none> (no description available)
-- no debconf information
regards,
--
Kevin B. McCarty <kmccarty@princeton.edu> Physics Department
WWW: http://www.princeton.edu/~kmccarty/ Princeton University
GPG: public key ID 4F83C751 Princeton, NJ 08544
#include <stdio.h>
#include <string.h>
/* Expected result of running this program: output "did we get here?"
* and return value zero */
/* Actual result of running this program after compiling with gcc 4.0
* and optimization -O1 or higher: segmentation fault at the indicated line.
* Note that "gcc-4.0 -Wall -pedantic -O1 test.c" produces no warnings. */
int main(void)
{
/* If these variables are taken outside the struct things work as expected */
struct {
unsigned int len;
char * name;
} s;
/* This _should_ set s.name to be { 'R', '\0' } */
s.name = "R";
s.len = strlen("R");
/* If we remove the following line things work as expected */
s.name = "R";
if (s.name[s.len] != '\0')
/* Segfault happens here even though we should never enter the if */
s.name[s.len] = '\0';
printf("did we get here?\n");
return 0;
}
# 1 "test.c"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "test.c"
# 1 "/usr/include/stdio.h" 1 3 4
# 28 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/features.h" 1 3 4
# 308 "/usr/include/features.h" 3 4
# 1 "/usr/include/sys/cdefs.h" 1 3 4
# 309 "/usr/include/features.h" 2 3 4
# 331 "/usr/include/features.h" 3 4
# 1 "/usr/include/gnu/stubs.h" 1 3 4
# 332 "/usr/include/features.h" 2 3 4
# 29 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 1 3 4
# 214 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 3 4
typedef unsigned int size_t;
# 35 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/bits/types.h" 1 3 4
# 28 "/usr/include/bits/types.h" 3 4
# 1 "/usr/include/bits/wordsize.h" 1 3 4
# 29 "/usr/include/bits/types.h" 2 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 1 3 4
# 32 "/usr/include/bits/types.h" 2 3 4
typedef unsigned char __u_char;
typedef unsigned short int __u_short;
typedef unsigned int __u_int;
typedef unsigned long int __u_long;
typedef signed char __int8_t;
typedef unsigned char __uint8_t;
typedef signed short int __int16_t;
typedef unsigned short int __uint16_t;
typedef signed int __int32_t;
typedef unsigned int __uint32_t;
__extension__ typedef signed long long int __int64_t;
__extension__ typedef unsigned long long int __uint64_t;
__extension__ typedef long long int __quad_t;
__extension__ typedef unsigned long long int __u_quad_t;
# 129 "/usr/include/bits/types.h" 3 4
# 1 "/usr/include/bits/typesizes.h" 1 3 4
# 130 "/usr/include/bits/types.h" 2 3 4
__extension__ typedef __u_quad_t __dev_t;
__extension__ typedef unsigned int __uid_t;
__extension__ typedef unsigned int __gid_t;
__extension__ typedef unsigned long int __ino_t;
__extension__ typedef __u_quad_t __ino64_t;
__extension__ typedef unsigned int __mode_t;
__extension__ typedef unsigned int __nlink_t;
__extension__ typedef long int __off_t;
__extension__ typedef __quad_t __off64_t;
__extension__ typedef int __pid_t;
__extension__ typedef struct { int __val[2]; } __fsid_t;
__extension__ typedef long int __clock_t;
__extension__ typedef unsigned long int __rlim_t;
__extension__ typedef __u_quad_t __rlim64_t;
__extension__ typedef unsigned int __id_t;
__extension__ typedef long int __time_t;
__extension__ typedef unsigned int __useconds_t;
__extension__ typedef long int __suseconds_t;
__extension__ typedef int __daddr_t;
__extension__ typedef long int __swblk_t;
__extension__ typedef int __key_t;
__extension__ typedef int __clockid_t;
__extension__ typedef int __timer_t;
__extension__ typedef long int __blksize_t;
__extension__ typedef long int __blkcnt_t;
__extension__ typedef __quad_t __blkcnt64_t;
__extension__ typedef unsigned long int __fsblkcnt_t;
__extension__ typedef __u_quad_t __fsblkcnt64_t;
__extension__ typedef unsigned long int __fsfilcnt_t;
__extension__ typedef __u_quad_t __fsfilcnt64_t;
__extension__ typedef int __ssize_t;
typedef __off64_t __loff_t;
typedef __quad_t *__qaddr_t;
typedef char *__caddr_t;
__extension__ typedef int __intptr_t;
__extension__ typedef unsigned int __socklen_t;
# 37 "/usr/include/stdio.h" 2 3 4
typedef struct _IO_FILE FILE;
# 62 "/usr/include/stdio.h" 3 4
typedef struct _IO_FILE __FILE;
# 72 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/libio.h" 1 3 4
# 32 "/usr/include/libio.h" 3 4
# 1 "/usr/include/_G_config.h" 1 3 4
# 14 "/usr/include/_G_config.h" 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 1 3 4
# 326 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 3 4
typedef int wchar_t;
# 355 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 3 4
typedef unsigned int wint_t;
# 15 "/usr/include/_G_config.h" 2 3 4
# 24 "/usr/include/_G_config.h" 3 4
# 1 "/usr/include/wchar.h" 1 3 4
# 48 "/usr/include/wchar.h" 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 1 3 4
# 49 "/usr/include/wchar.h" 2 3 4
# 1 "/usr/include/bits/wchar.h" 1 3 4
# 51 "/usr/include/wchar.h" 2 3 4
# 76 "/usr/include/wchar.h" 3 4
typedef struct
{
int __count;
union
{
wint_t __wch;
char __wchb[4];
} __value;
} __mbstate_t;
# 25 "/usr/include/_G_config.h" 2 3 4
typedef struct
{
__off_t __pos;
__mbstate_t __state;
} _G_fpos_t;
typedef struct
{
__off64_t __pos;
__mbstate_t __state;
} _G_fpos64_t;
# 44 "/usr/include/_G_config.h" 3 4
# 1 "/usr/include/gconv.h" 1 3 4
# 28 "/usr/include/gconv.h" 3 4
# 1 "/usr/include/wchar.h" 1 3 4
# 48 "/usr/include/wchar.h" 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 1 3 4
# 49 "/usr/include/wchar.h" 2 3 4
# 29 "/usr/include/gconv.h" 2 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 1 3 4
# 32 "/usr/include/gconv.h" 2 3 4
enum
{
__GCONV_OK = 0,
__GCONV_NOCONV,
__GCONV_NODB,
__GCONV_NOMEM,
__GCONV_EMPTY_INPUT,
__GCONV_FULL_OUTPUT,
__GCONV_ILLEGAL_INPUT,
__GCONV_INCOMPLETE_INPUT,
__GCONV_ILLEGAL_DESCRIPTOR,
__GCONV_INTERNAL_ERROR
};
enum
{
__GCONV_IS_LAST = 0x0001,
__GCONV_IGNORE_ERRORS = 0x0002
};
struct __gconv_step;
struct __gconv_step_data;
struct __gconv_loaded_object;
struct __gconv_trans_data;
typedef int (*__gconv_fct) (struct __gconv_step *, struct __gconv_step_data *,
__const unsigned char **, __const unsigned char *,
unsigned char **, size_t *, int, int);
typedef wint_t (*__gconv_btowc_fct) (struct __gconv_step *, unsigned char);
typedef int (*__gconv_init_fct) (struct __gconv_step *);
typedef void (*__gconv_end_fct) (struct __gconv_step *);
typedef int (*__gconv_trans_fct) (struct __gconv_step *,
struct __gconv_step_data *, void *,
__const unsigned char *,
__const unsigned char **,
__const unsigned char *, unsigned char **,
size_t *);
typedef int (*__gconv_trans_context_fct) (void *, __const unsigned char *,
__const unsigned char *,
unsigned char *, unsigned char *);
typedef int (*__gconv_trans_query_fct) (__const char *, __const char ***,
size_t *);
typedef int (*__gconv_trans_init_fct) (void **, const char *);
typedef void (*__gconv_trans_end_fct) (void *);
struct __gconv_trans_data
{
__gconv_trans_fct __trans_fct;
__gconv_trans_context_fct __trans_context_fct;
__gconv_trans_end_fct __trans_end_fct;
void *__data;
struct __gconv_trans_data *__next;
};
struct __gconv_step
{
struct __gconv_loaded_object *__shlib_handle;
__const char *__modname;
int __counter;
char *__from_name;
char *__to_name;
__gconv_fct __fct;
__gconv_btowc_fct __btowc_fct;
__gconv_init_fct __init_fct;
__gconv_end_fct __end_fct;
int __min_needed_from;
int __max_needed_from;
int __min_needed_to;
int __max_needed_to;
int __stateful;
void *__data;
};
struct __gconv_step_data
{
unsigned char *__outbuf;
unsigned char *__outbufend;
int __flags;
int __invocation_counter;
int __internal_use;
__mbstate_t *__statep;
__mbstate_t __state;
struct __gconv_trans_data *__trans;
};
typedef struct __gconv_info
{
size_t __nsteps;
struct __gconv_step *__steps;
__extension__ struct __gconv_step_data __data [];
} *__gconv_t;
# 45 "/usr/include/_G_config.h" 2 3 4
typedef union
{
struct __gconv_info __cd;
struct
{
struct __gconv_info __cd;
struct __gconv_step_data __data;
} __combined;
} _G_iconv_t;
typedef int _G_int16_t __attribute__ ((__mode__ (__HI__)));
typedef int _G_int32_t __attribute__ ((__mode__ (__SI__)));
typedef unsigned int _G_uint16_t __attribute__ ((__mode__ (__HI__)));
typedef unsigned int _G_uint32_t __attribute__ ((__mode__ (__SI__)));
# 33 "/usr/include/libio.h" 2 3 4
# 53 "/usr/include/libio.h" 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stdarg.h" 1 3 4
# 43 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stdarg.h" 3 4
typedef __builtin_va_list __gnuc_va_list;
# 54 "/usr/include/libio.h" 2 3 4
# 166 "/usr/include/libio.h" 3 4
struct _IO_jump_t; struct _IO_FILE;
# 176 "/usr/include/libio.h" 3 4
typedef void _IO_lock_t;
struct _IO_marker {
struct _IO_marker *_next;
struct _IO_FILE *_sbuf;
int _pos;
# 199 "/usr/include/libio.h" 3 4
};
enum __codecvt_result
{
__codecvt_ok,
__codecvt_partial,
__codecvt_error,
__codecvt_noconv
};
# 267 "/usr/include/libio.h" 3 4
struct _IO_FILE {
int _flags;
char* _IO_read_ptr;
char* _IO_read_end;
char* _IO_read_base;
char* _IO_write_base;
char* _IO_write_ptr;
char* _IO_write_end;
char* _IO_buf_base;
char* _IO_buf_end;
char *_IO_save_base;
char *_IO_backup_base;
char *_IO_save_end;
struct _IO_marker *_markers;
struct _IO_FILE *_chain;
int _fileno;
int _flags2;
__off_t _old_offset;
unsigned short _cur_column;
signed char _vtable_offset;
char _shortbuf[1];
_IO_lock_t *_lock;
# 315 "/usr/include/libio.h" 3 4
__off64_t _offset;
void *__pad1;
void *__pad2;
int _mode;
char _unused2[15 * sizeof (int) - 2 * sizeof (void *)];
};
typedef struct _IO_FILE _IO_FILE;
struct _IO_FILE_plus;
extern struct _IO_FILE_plus _IO_2_1_stdin_;
extern struct _IO_FILE_plus _IO_2_1_stdout_;
extern struct _IO_FILE_plus _IO_2_1_stderr_;
# 354 "/usr/include/libio.h" 3 4
typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
typedef __ssize_t __io_write_fn (void *__cookie, __const char *__buf,
size_t __n);
typedef int __io_seek_fn (void *__cookie, __off64_t *__pos, int __w);
typedef int __io_close_fn (void *__cookie);
# 406 "/usr/include/libio.h" 3 4
extern int __underflow (_IO_FILE *) __attribute__ ((__nothrow__));
extern int __uflow (_IO_FILE *) __attribute__ ((__nothrow__));
extern int __overflow (_IO_FILE *, int) __attribute__ ((__nothrow__));
extern wint_t __wunderflow (_IO_FILE *) __attribute__ ((__nothrow__));
extern wint_t __wuflow (_IO_FILE *) __attribute__ ((__nothrow__));
extern wint_t __woverflow (_IO_FILE *, wint_t) __attribute__ ((__nothrow__));
# 444 "/usr/include/libio.h" 3 4
extern int _IO_getc (_IO_FILE *__fp) __attribute__ ((__nothrow__));
extern int _IO_putc (int __c, _IO_FILE *__fp) __attribute__ ((__nothrow__));
extern int _IO_feof (_IO_FILE *__fp) __attribute__ ((__nothrow__));
extern int _IO_ferror (_IO_FILE *__fp) __attribute__ ((__nothrow__));
extern int _IO_peekc_locked (_IO_FILE *__fp) __attribute__ ((__nothrow__));
extern void _IO_flockfile (_IO_FILE *) __attribute__ ((__nothrow__));
extern void _IO_funlockfile (_IO_FILE *) __attribute__ ((__nothrow__));
extern int _IO_ftrylockfile (_IO_FILE *) __attribute__ ((__nothrow__));
# 474 "/usr/include/libio.h" 3 4
extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
__gnuc_va_list, int *__restrict) __attribute__ ((__nothrow__));
extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
__gnuc_va_list) __attribute__ ((__nothrow__));
extern __ssize_t _IO_padn (_IO_FILE *, int, __ssize_t) __attribute__ ((__nothrow__));
extern size_t _IO_sgetn (_IO_FILE *, void *, size_t) __attribute__ ((__nothrow__));
extern __off64_t _IO_seekoff (_IO_FILE *, __off64_t, int, int) __attribute__ ((__nothrow__));
extern __off64_t _IO_seekpos (_IO_FILE *, __off64_t, int) __attribute__ ((__nothrow__));
extern void _IO_free_backup_area (_IO_FILE *) __attribute__ ((__nothrow__));
# 73 "/usr/include/stdio.h" 2 3 4
# 86 "/usr/include/stdio.h" 3 4
typedef _G_fpos_t fpos_t;
# 138 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/bits/stdio_lim.h" 1 3 4
# 139 "/usr/include/stdio.h" 2 3 4
extern struct _IO_FILE *stdin;
extern struct _IO_FILE *stdout;
extern struct _IO_FILE *stderr;
extern int remove (__const char *__filename) __attribute__ ((__nothrow__));
extern int rename (__const char *__old, __const char *__new) __attribute__ ((__nothrow__));
extern FILE *tmpfile (void);
# 178 "/usr/include/stdio.h" 3 4
extern char *tmpnam (char *__s) __attribute__ ((__nothrow__));
extern char *tmpnam_r (char *__s) __attribute__ ((__nothrow__));
# 196 "/usr/include/stdio.h" 3 4
extern char *tempnam (__const char *__dir, __const char *__pfx)
__attribute__ ((__nothrow__)) __attribute__ ((__malloc__));
extern int fclose (FILE *__stream);
extern int fflush (FILE *__stream);
# 221 "/usr/include/stdio.h" 3 4
extern int fflush_unlocked (FILE *__stream);
# 235 "/usr/include/stdio.h" 3 4
extern FILE *fopen (__const char *__restrict __filename,
__const char *__restrict __modes);
extern FILE *freopen (__const char *__restrict __filename,
__const char *__restrict __modes,
FILE *__restrict __stream);
# 262 "/usr/include/stdio.h" 3 4
# 273 "/usr/include/stdio.h" 3 4
extern FILE *fdopen (int __fd, __const char *__modes) __attribute__ ((__nothrow__));
# 294 "/usr/include/stdio.h" 3 4
extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __attribute__ ((__nothrow__));
extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
int __modes, size_t __n) __attribute__ ((__nothrow__));
extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
size_t __size) __attribute__ ((__nothrow__));
extern void setlinebuf (FILE *__stream) __attribute__ ((__nothrow__));
extern int fprintf (FILE *__restrict __stream,
__const char *__restrict __format, ...);
extern int printf (__const char *__restrict __format, ...);
extern int sprintf (char *__restrict __s,
__const char *__restrict __format, ...) __attribute__ ((__nothrow__));
extern int vfprintf (FILE *__restrict __s, __const char *__restrict __format,
__gnuc_va_list __arg);
extern int vprintf (__const char *__restrict __format, __gnuc_va_list __arg);
extern int vsprintf (char *__restrict __s, __const char *__restrict __format,
__gnuc_va_list __arg) __attribute__ ((__nothrow__));
extern int snprintf (char *__restrict __s, size_t __maxlen,
__const char *__restrict __format, ...)
__attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 4)));
extern int vsnprintf (char *__restrict __s, size_t __maxlen,
__const char *__restrict __format, __gnuc_va_list __arg)
__attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 0)));
# 388 "/usr/include/stdio.h" 3 4
extern int fscanf (FILE *__restrict __stream,
__const char *__restrict __format, ...);
extern int scanf (__const char *__restrict __format, ...);
extern int sscanf (__const char *__restrict __s,
__const char *__restrict __format, ...) __attribute__ ((__nothrow__));
# 430 "/usr/include/stdio.h" 3 4
extern int fgetc (FILE *__stream);
extern int getc (FILE *__stream);
extern int getchar (void);
# 454 "/usr/include/stdio.h" 3 4
extern int getc_unlocked (FILE *__stream);
extern int getchar_unlocked (void);
# 465 "/usr/include/stdio.h" 3 4
extern int fgetc_unlocked (FILE *__stream);
extern int fputc (int __c, FILE *__stream);
extern int putc (int __c, FILE *__stream);
extern int putchar (int __c);
# 498 "/usr/include/stdio.h" 3 4
extern int fputc_unlocked (int __c, FILE *__stream);
extern int putc_unlocked (int __c, FILE *__stream);
extern int putchar_unlocked (int __c);
extern int getw (FILE *__stream);
extern int putw (int __w, FILE *__stream);
extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream);
extern char *gets (char *__s);
# 578 "/usr/include/stdio.h" 3 4
extern int fputs (__const char *__restrict __s, FILE *__restrict __stream);
extern int puts (__const char *__s);
extern int ungetc (int __c, FILE *__stream);
extern size_t fread (void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream);
extern size_t fwrite (__const void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __s);
# 631 "/usr/include/stdio.h" 3 4
extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream);
extern size_t fwrite_unlocked (__const void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream);
extern int fseek (FILE *__stream, long int __off, int __whence);
extern long int ftell (FILE *__stream);
extern void rewind (FILE *__stream);
# 686 "/usr/include/stdio.h" 3 4
extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
extern int fsetpos (FILE *__stream, __const fpos_t *__pos);
# 709 "/usr/include/stdio.h" 3 4
# 718 "/usr/include/stdio.h" 3 4
extern void clearerr (FILE *__stream) __attribute__ ((__nothrow__));
extern int feof (FILE *__stream) __attribute__ ((__nothrow__));
extern int ferror (FILE *__stream) __attribute__ ((__nothrow__));
extern void clearerr_unlocked (FILE *__stream) __attribute__ ((__nothrow__));
extern int feof_unlocked (FILE *__stream) __attribute__ ((__nothrow__));
extern int ferror_unlocked (FILE *__stream) __attribute__ ((__nothrow__));
extern void perror (__const char *__s);
# 1 "/usr/include/bits/sys_errlist.h" 1 3 4
# 27 "/usr/include/bits/sys_errlist.h" 3 4
extern int sys_nerr;
extern __const char *__const sys_errlist[];
# 748 "/usr/include/stdio.h" 2 3 4
extern int fileno (FILE *__stream) __attribute__ ((__nothrow__));
extern int fileno_unlocked (FILE *__stream) __attribute__ ((__nothrow__));
# 767 "/usr/include/stdio.h" 3 4
extern FILE *popen (__const char *__command, __const char *__modes);
extern int pclose (FILE *__stream);
extern char *ctermid (char *__s) __attribute__ ((__nothrow__));
# 807 "/usr/include/stdio.h" 3 4
extern void flockfile (FILE *__stream) __attribute__ ((__nothrow__));
extern int ftrylockfile (FILE *__stream) __attribute__ ((__nothrow__));
extern void funlockfile (FILE *__stream) __attribute__ ((__nothrow__));
# 828 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/bits/stdio.h" 1 3 4
# 33 "/usr/include/bits/stdio.h" 3 4
extern __inline int
vprintf (__const char *__restrict __fmt, __gnuc_va_list __arg)
{
return vfprintf (stdout, __fmt, __arg);
}
extern __inline int
getchar (void)
{
return _IO_getc (stdin);
}
extern __inline int
getc_unlocked (FILE *__fp)
{
return (__builtin_expect ((__fp)->_IO_read_ptr >= (__fp)->_IO_read_end, 0) ? __uflow (__fp) : *(unsigned char *) (__fp)->_IO_read_ptr++);
}
extern __inline int
getchar_unlocked (void)
{
return (__builtin_expect ((stdin)->_IO_read_ptr >= (stdin)->_IO_read_end, 0) ? __uflow (stdin) : *(unsigned char *) (stdin)->_IO_read_ptr++);
}
extern __inline int
putchar (int __c)
{
return _IO_putc (__c, stdout);
}
extern __inline int
fputc_unlocked (int __c, FILE *__stream)
{
return (__builtin_expect ((__stream)->_IO_write_ptr >= (__stream)->_IO_write_end, 0) ? __overflow (__stream, (unsigned char) (__c)) : (unsigned char) (*(__stream)->_IO_write_ptr++ = (__c)));
}
extern __inline int
putc_unlocked (int __c, FILE *__stream)
{
return (__builtin_expect ((__stream)->_IO_write_ptr >= (__stream)->_IO_write_end, 0) ? __overflow (__stream, (unsigned char) (__c)) : (unsigned char) (*(__stream)->_IO_write_ptr++ = (__c)));
}
extern __inline int
putchar_unlocked (int __c)
{
return (__builtin_expect ((stdout)->_IO_write_ptr >= (stdout)->_IO_write_end, 0) ? __overflow (stdout, (unsigned char) (__c)) : (unsigned char) (*(stdout)->_IO_write_ptr++ = (__c)));
}
# 111 "/usr/include/bits/stdio.h" 3 4
extern __inline int
__attribute__ ((__nothrow__)) feof_unlocked (FILE *__stream)
{
return (((__stream)->_flags & 0x10) != 0);
}
extern __inline int
__attribute__ ((__nothrow__)) ferror_unlocked (FILE *__stream)
{
return (((__stream)->_flags & 0x20) != 0);
}
# 829 "/usr/include/stdio.h" 2 3 4
# 2 "test.c" 2
# 1 "/usr/include/string.h" 1 3 4
# 28 "/usr/include/string.h" 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 1 3 4
# 34 "/usr/include/string.h" 2 3 4
extern void *memcpy (void *__restrict __dest,
__const void *__restrict __src, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern void *memmove (void *__dest, __const void *__src, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern void *memccpy (void *__restrict __dest, __const void *__restrict __src,
int __c, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern void *memset (void *__s, int __c, size_t __n) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1)));
extern int memcmp (__const void *__s1, __const void *__s2, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern void *memchr (__const void *__s, int __c, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
# 82 "/usr/include/string.h" 3 4
extern char *strcpy (char *__restrict __dest, __const char *__restrict __src)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern char *strncpy (char *__restrict __dest,
__const char *__restrict __src, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern char *strcat (char *__restrict __dest, __const char *__restrict __src)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern char *strncat (char *__restrict __dest, __const char *__restrict __src,
size_t __n) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern int strcmp (__const char *__s1, __const char *__s2)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern int strncmp (__const char *__s1, __const char *__s2, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern int strcoll (__const char *__s1, __const char *__s2)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern size_t strxfrm (char *__restrict __dest,
__const char *__restrict __src, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (2)));
# 130 "/usr/include/string.h" 3 4
extern char *strdup (__const char *__s)
__attribute__ ((__nothrow__)) __attribute__ ((__malloc__)) __attribute__ ((__nonnull__ (1)));
# 165 "/usr/include/string.h" 3 4
extern char *strchr (__const char *__s, int __c)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
extern char *strrchr (__const char *__s, int __c)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
# 181 "/usr/include/string.h" 3 4
extern size_t strcspn (__const char *__s, __const char *__reject)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern size_t strspn (__const char *__s, __const char *__accept)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern char *strpbrk (__const char *__s, __const char *__accept)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern char *strstr (__const char *__haystack, __const char *__needle)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern char *strtok (char *__restrict __s, __const char *__restrict __delim)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (2)));
extern char *__strtok_r (char *__restrict __s,
__const char *__restrict __delim,
char **__restrict __save_ptr)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (2, 3)));
extern char *strtok_r (char *__restrict __s, __const char *__restrict __delim,
char **__restrict __save_ptr)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (2, 3)));
# 240 "/usr/include/string.h" 3 4
extern size_t strlen (__const char *__s)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
# 254 "/usr/include/string.h" 3 4
extern char *strerror (int __errnum) __attribute__ ((__nothrow__));
# 281 "/usr/include/string.h" 3 4
extern char *strerror_r (int __errnum, char *__buf, size_t __buflen)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (2)));
extern void __bzero (void *__s, size_t __n) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1)));
extern void bcopy (__const void *__src, void *__dest, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern void bzero (void *__s, size_t __n) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1)));
extern int bcmp (__const void *__s1, __const void *__s2, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern char *index (__const char *__s, int __c)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
extern char *rindex (__const char *__s, int __c)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
extern int ffs (int __i) __attribute__ ((__nothrow__)) __attribute__ ((__const__));
# 325 "/usr/include/string.h" 3 4
extern int strcasecmp (__const char *__s1, __const char *__s2)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
extern int strncasecmp (__const char *__s1, __const char *__s2, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1, 2)));
# 348 "/usr/include/string.h" 3 4
extern char *strsep (char **__restrict __stringp,
__const char *__restrict __delim)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
# 414 "/usr/include/string.h" 3 4
# 1 "/usr/include/bits/string.h" 1 3 4
# 415 "/usr/include/string.h" 2 3 4
# 1 "/usr/include/bits/string2.h" 1 3 4
# 52 "/usr/include/bits/string2.h" 3 4
# 1 "/usr/include/endian.h" 1 3 4
# 37 "/usr/include/endian.h" 3 4
# 1 "/usr/include/bits/endian.h" 1 3 4
# 38 "/usr/include/endian.h" 2 3 4
# 53 "/usr/include/bits/string2.h" 2 3 4
# 394 "/usr/include/bits/string2.h" 3 4
extern void *__rawmemchr (const void *__s, int __c);
# 969 "/usr/include/bits/string2.h" 3 4
extern __inline size_t __strcspn_c1 (__const char *__s, int __reject);
extern __inline size_t
__strcspn_c1 (__const char *__s, int __reject)
{
register size_t __result = 0;
while (__s[__result] != '\0' && __s[__result] != __reject)
++__result;
return __result;
}
extern __inline size_t __strcspn_c2 (__const char *__s, int __reject1,
int __reject2);
extern __inline size_t
__strcspn_c2 (__const char *__s, int __reject1, int __reject2)
{
register size_t __result = 0;
while (__s[__result] != '\0' && __s[__result] != __reject1
&& __s[__result] != __reject2)
++__result;
return __result;
}
extern __inline size_t __strcspn_c3 (__const char *__s, int __reject1,
int __reject2, int __reject3);
extern __inline size_t
__strcspn_c3 (__const char *__s, int __reject1, int __reject2,
int __reject3)
{
register size_t __result = 0;
while (__s[__result] != '\0' && __s[__result] != __reject1
&& __s[__result] != __reject2 && __s[__result] != __reject3)
++__result;
return __result;
}
# 1045 "/usr/include/bits/string2.h" 3 4
extern __inline size_t __strspn_c1 (__const char *__s, int __accept);
extern __inline size_t
__strspn_c1 (__const char *__s, int __accept)
{
register size_t __result = 0;
while (__s[__result] == __accept)
++__result;
return __result;
}
extern __inline size_t __strspn_c2 (__const char *__s, int __accept1,
int __accept2);
extern __inline size_t
__strspn_c2 (__const char *__s, int __accept1, int __accept2)
{
register size_t __result = 0;
while (__s[__result] == __accept1 || __s[__result] == __accept2)
++__result;
return __result;
}
extern __inline size_t __strspn_c3 (__const char *__s, int __accept1,
int __accept2, int __accept3);
extern __inline size_t
__strspn_c3 (__const char *__s, int __accept1, int __accept2, int __accept3)
{
register size_t __result = 0;
while (__s[__result] == __accept1 || __s[__result] == __accept2
|| __s[__result] == __accept3)
++__result;
return __result;
}
# 1121 "/usr/include/bits/string2.h" 3 4
extern __inline char *__strpbrk_c2 (__const char *__s, int __accept1,
int __accept2);
extern __inline char *
__strpbrk_c2 (__const char *__s, int __accept1, int __accept2)
{
while (*__s != '\0' && *__s != __accept1 && *__s != __accept2)
++__s;
return *__s == '\0' ? ((void *)0) : (char *) (size_t) __s;
}
extern __inline char *__strpbrk_c3 (__const char *__s, int __accept1,
int __accept2, int __accept3);
extern __inline char *
__strpbrk_c3 (__const char *__s, int __accept1, int __accept2,
int __accept3)
{
while (*__s != '\0' && *__s != __accept1 && *__s != __accept2
&& *__s != __accept3)
++__s;
return *__s == '\0' ? ((void *)0) : (char *) (size_t) __s;
}
# 1173 "/usr/include/bits/string2.h" 3 4
extern __inline char *__strtok_r_1c (char *__s, char __sep, char **__nextp);
extern __inline char *
__strtok_r_1c (char *__s, char __sep, char **__nextp)
{
char *__result;
if (__s == ((void *)0))
__s = *__nextp;
while (*__s == __sep)
++__s;
__result = ((void *)0);
if (*__s != '\0')
{
__result = __s++;
while (*__s != '\0')
if (*__s++ == __sep)
{
__s[-1] = '\0';
break;
}
*__nextp = __s;
}
return __result;
}
# 1205 "/usr/include/bits/string2.h" 3 4
extern char *__strsep_g (char **__stringp, __const char *__delim);
# 1223 "/usr/include/bits/string2.h" 3 4
extern __inline char *__strsep_1c (char **__s, char __reject);
extern __inline char *
__strsep_1c (char **__s, char __reject)
{
register char *__retval = *__s;
if (__retval != ((void *)0) && (*__s = (__extension__ (__builtin_constant_p (__reject) && !__builtin_constant_p (__retval) && (__reject) == '\0' ? (char *) __rawmemchr (__retval, __reject) : __builtin_strchr (__retval, __reject)))) != ((void *)0))
*(*__s)++ = '\0';
return __retval;
}
extern __inline char *__strsep_2c (char **__s, char __reject1, char __reject2);
extern __inline char *
__strsep_2c (char **__s, char __reject1, char __reject2)
{
register char *__retval = *__s;
if (__retval != ((void *)0))
{
register char *__cp = __retval;
while (1)
{
if (*__cp == '\0')
{
__cp = ((void *)0);
break;
}
if (*__cp == __reject1 || *__cp == __reject2)
{
*__cp++ = '\0';
break;
}
++__cp;
}
*__s = __cp;
}
return __retval;
}
extern __inline char *__strsep_3c (char **__s, char __reject1, char __reject2,
char __reject3);
extern __inline char *
__strsep_3c (char **__s, char __reject1, char __reject2, char __reject3)
{
register char *__retval = *__s;
if (__retval != ((void *)0))
{
register char *__cp = __retval;
while (1)
{
if (*__cp == '\0')
{
__cp = ((void *)0);
break;
}
if (*__cp == __reject1 || *__cp == __reject2 || *__cp == __reject3)
{
*__cp++ = '\0';
break;
}
++__cp;
}
*__s = __cp;
}
return __retval;
}
# 1299 "/usr/include/bits/string2.h" 3 4
# 1 "/usr/include/stdlib.h" 1 3 4
# 33 "/usr/include/stdlib.h" 3 4
# 1 "/usr/lib/gcc/i486-linux-gnu/4.0.2/include/stddef.h" 1 3 4
# 34 "/usr/include/stdlib.h" 2 3 4
# 582 "/usr/include/stdlib.h" 3 4
extern void *malloc (size_t __size) __attribute__ ((__nothrow__)) __attribute__ ((__malloc__));
extern void *calloc (size_t __nmemb, size_t __size)
__attribute__ ((__nothrow__)) __attribute__ ((__malloc__));
# 961 "/usr/include/stdlib.h" 3 4
# 1300 "/usr/include/bits/string2.h" 2 3 4
extern char *__strdup (__const char *__string) __attribute__ ((__nothrow__)) __attribute__ ((__malloc__));
# 1323 "/usr/include/bits/string2.h" 3 4
extern char *__strndup (__const char *__string, size_t __n)
__attribute__ ((__nothrow__)) __attribute__ ((__malloc__));
# 418 "/usr/include/string.h" 2 3 4
# 426 "/usr/include/string.h" 3 4
# 3 "test.c" 2
# 11 "test.c"
int main(void)
{
struct {
unsigned int len;
char * name;
} s;
s.name = "R";
s.len = strlen("R");
s.name = "R";
if (s.name[s.len] != '\0')
s.name[s.len] = '\0';
printf("did we get here?\n");
return 0;
}
.file "test.c"
.section .rodata.str1.1,"aMS",@progbits,1
.LC0:
.string "R"
.LC1:
.string "did we get here?"
.text
.globl main
.type main, @function
main:
pushl %ebp
movl %esp, %ebp
subl $8, %esp
andl $-16, %esp
subl $28, %esp
movb $0, .LC0+1
pushl $.LC1
call puts
movl $0, %eax
leave
ret
.size main, .-main
.ident "GCC: (GNU) 4.0.2 20050816 (prerelease) (Debian 4.0.1-5)"
.section .note.GNU-stack,"",@progbits
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