HI ! while doing some gcc qualification testing and analysis I cam accross the following "bug" - its a bit obscure combination of compiler flags that are technically not useful so I'm not sure if this warrents a bug report or not - maybe its only a "buglet" :) I only have this on one system (debian 7.0) - so if anyone happens to have gcc 4.7.2 installed - could you check if this triggers ? the hello.c is really just the standard hello_world.c, it seems to trigger on anything. hofrat@debian:~$ gcc -ftest-coverage -fbranch-probabilities hello.c hello.c:1:0: internal compiler error: in gcov_open, at gcov-io.c:82 Please submit a full bug report, with preprocessed source if appropriate. See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions. Preprocessed source stored into /tmp/cchEOdKJ.out file, please attach this to your bugreport. The problem seems to result in invalid preprocessor code being generated. thx! hofrat BUG Report ---------- - seems to be unintended behavior - not found in http://gcc.gnu.org/bugs.html#known - not checked with latest gcc 4.8 - this bug does not turn up in older versions - gcc-3.3.4 hofrat@rtl14:~$ gcc -ftest-coverage -fbranch-probabilities hello.c hello.c:0: warning: file hello.da not found, execution counts assumed to be zero gcc-4.4.5 hofrat@rtl17:~$ gcc -ftest-coverage -fbranch-probabilities hello.c hello.c: In function 'main': hello.c:6: note: file /home/hofrat/hello.gcda not found, execution counts assumed to be zero - not reported in the debian bug tracking does not seem to be in the gcc bugtracking (keyword test-coverage) Bug Summary ----------- * the exact version of GCC; gcc version 4.7.2 (Debian 4.7.2-5) * the system type; Intel i7 2600M Linux debian 2.6.32-5-amd64 #1 SMP Fri Feb 15 15:39:52 UTC 2013 x86_64 GNU/Linux /etc/debian_version 7.0 * the options given when GCC was configured/built; Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.7.2-5' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.7 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --with-arch-32=i586 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix * the complete command line that triggers the bug; gcc -ftest-coverage -fbranch-probabilities hello.c * the compiler output (error messages, warnings, etc.); and hofrat@debian:~$ gcc -ftest-coverage -fbranch-probabilities hello.c hello.c:1:0: internal compiler error: in gcov_open, at gcov-io.c:82 Please submit a full bug report, with preprocessed source if appropriate. See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions. Preprocessed source stored into /tmp/cchEOdKJ.out file, please attach this to your bugreport. * the preprocessed file (*.i*) that triggers the bug, generated by adding -save-temps to the complete compilation command, or, in the case of a bug report for the GNAT front end, a complete set of source files (see below). <snip cchEOdKJ.out> // /usr/lib/gcc/x86_64-linux-gnu/4.7/cc1 -quiet -imultiarch x86_64-linux-gnu hello.c -quiet -dumpbase hello.c -mtune=generic -march=x86-64 -auxbase hello -ftest-coverage -fbranch-probabilities -o - -frandom-seed=0 # 1 "hello.c" # 1 "<command-line>" # 1 "hello.c" # 1 "/usr/include/stdio.h" 1 3 4 # 28 "/usr/include/stdio.h" 3 4 # 1 "/usr/include/features.h" 1 3 4 # 323 "/usr/include/features.h" 3 4 # 1 "/usr/include/x86_64-linux-gnu/bits/predefs.h" 1 3 4 # 324 "/usr/include/features.h" 2 3 4 # 356 "/usr/include/features.h" 3 4 # 1 "/usr/include/x86_64-linux-gnu/sys/cdefs.h" 1 3 4 # 359 "/usr/include/x86_64-linux-gnu/sys/cdefs.h" 3 4 # 1 "/usr/include/x86_64-linux-gnu/bits/wordsize.h" 1 3 4 # 360 "/usr/include/x86_64-linux-gnu/sys/cdefs.h" 2 3 4 # 357 "/usr/include/features.h" 2 3 4 # 388 "/usr/include/features.h" 3 4 # 1 "/usr/include/x86_64-linux-gnu/gnu/stubs.h" 1 3 4 # 1 "/usr/include/x86_64-linux-gnu/bits/wordsize.h" 1 3 4 # 5 "/usr/include/x86_64-linux-gnu/gnu/stubs.h" 2 3 4 # 1 "/usr/include/x86_64-linux-gnu/gnu/stubs-64.h" 1 3 4 # 10 "/usr/include/x86_64-linux-gnu/gnu/stubs.h" 2 3 4 # 389 "/usr/include/features.h" 2 3 4 # 29 "/usr/include/stdio.h" 2 3 4 # 1 "/usr/lib/gcc/x86_64-linux-gnu/4.7/include/stddef.h" 1 3 4 # 213 "/usr/lib/gcc/x86_64-linux-gnu/4.7/include/stddef.h" 3 4 typedef long unsigned int size_t; # 35 "/usr/include/stdio.h" 2 3 4 # 1 "/usr/include/x86_64-linux-gnu/bits/types.h" 1 3 4 # 28 "/usr/include/x86_64-linux-gnu/bits/types.h" 3 4 # 1 "/usr/include/x86_64-linux-gnu/bits/wordsize.h" 1 3 4 # 29 "/usr/include/x86_64-linux-gnu/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; typedef signed long int __int64_t; typedef unsigned long int __uint64_t; typedef long int __quad_t; typedef unsigned long int __u_quad_t; # 131 "/usr/include/x86_64-linux-gnu/bits/types.h" 3 4 # 1 "/usr/include/x86_64-linux-gnu/bits/typesizes.h" 1 3 4 # 132 "/usr/include/x86_64-linux-gnu/bits/types.h" 2 3 4 typedef unsigned long int __dev_t; typedef unsigned int __uid_t; typedef unsigned int __gid_t; typedef unsigned long int __ino_t; typedef unsigned long int __ino64_t; typedef unsigned int __mode_t; typedef unsigned long int __nlink_t; typedef long int __off_t; typedef long int __off64_t; typedef int __pid_t; typedef struct { int __val[2]; } __fsid_t; typedef long int __clock_t; typedef unsigned long int __rlim_t; typedef unsigned long int __rlim64_t; typedef unsigned int __id_t; typedef long int __time_t; typedef unsigned int __useconds_t; typedef long int __suseconds_t; typedef int __daddr_t; typedef long int __swblk_t; typedef int __key_t; typedef int __clockid_t; typedef void * __timer_t; typedef long int __blksize_t; typedef long int __blkcnt_t; typedef long int __blkcnt64_t; typedef unsigned long int __fsblkcnt_t; typedef unsigned long int __fsblkcnt64_t; typedef unsigned long int __fsfilcnt_t; typedef unsigned long int __fsfilcnt64_t; typedef long int __ssize_t; typedef __off64_t __loff_t; typedef __quad_t *__qaddr_t; typedef char *__caddr_t; typedef long int __intptr_t; typedef unsigned int __socklen_t; # 37 "/usr/include/stdio.h" 2 3 4 # 45 "/usr/include/stdio.h" 3 4 struct _IO_FILE; typedef struct _IO_FILE FILE; # 65 "/usr/include/stdio.h" 3 4 typedef struct _IO_FILE __FILE; # 75 "/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 # 15 "/usr/include/_G_config.h" 3 4 # 1 "/usr/lib/gcc/x86_64-linux-gnu/4.7/include/stddef.h" 1 3 4 # 16 "/usr/include/_G_config.h" 2 3 4 # 1 "/usr/include/wchar.h" 1 3 4 # 83 "/usr/include/wchar.h" 3 4 typedef struct { int __count; union { unsigned int __wch; char __wchb[4]; } __value; } __mbstate_t; # 21 "/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; # 53 "/usr/include/_G_config.h" 3 4 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/x86_64-linux-gnu/4.7/include/stdarg.h" 1 3 4 # 40 "/usr/lib/gcc/x86_64-linux-gnu/4.7/include/stdarg.h" 3 4 typedef __builtin_va_list __gnuc_va_list; # 54 "/usr/include/libio.h" 2 3 4 # 170 "/usr/include/libio.h" 3 4 struct _IO_jump_t; struct _IO_FILE; # 180 "/usr/include/libio.h" 3 4 typedef void _IO_lock_t; struct _IO_marker { struct _IO_marker *_next; struct _IO_FILE *_sbuf; int _pos; # 203 "/usr/include/libio.h" 3 4 }; enum __codecvt_result { __codecvt_ok, __codecvt_partial, __codecvt_error, __codecvt_noconv }; # 271 "/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; # 319 "/usr/include/libio.h" 3 4 __off64_t _offset; # 328 "/usr/include/libio.h" 3 4 void *__pad1; void *__pad2; void *__pad3; void *__pad4; size_t __pad5; int _mode; char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)]; }; 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_; # 364 "/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); # 416 "/usr/include/libio.h" 3 4 extern int __underflow (_IO_FILE *); extern int __uflow (_IO_FILE *); extern int __overflow (_IO_FILE *, int); # 460 "/usr/include/libio.h" 3 4 extern int _IO_getc (_IO_FILE *__fp); extern int _IO_putc (int __c, _IO_FILE *__fp); 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); extern void _IO_flockfile (_IO_FILE *) __attribute__ ((__nothrow__)); extern void _IO_funlockfile (_IO_FILE *) __attribute__ ((__nothrow__)); extern int _IO_ftrylockfile (_IO_FILE *) __attribute__ ((__nothrow__)); # 490 "/usr/include/libio.h" 3 4 extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict, __gnuc_va_list, int *__restrict); extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict, __gnuc_va_list); extern __ssize_t _IO_padn (_IO_FILE *, int, __ssize_t); extern size_t _IO_sgetn (_IO_FILE *, void *, size_t); extern __off64_t _IO_seekoff (_IO_FILE *, __off64_t, int, int); extern __off64_t _IO_seekpos (_IO_FILE *, __off64_t, int); extern void _IO_free_backup_area (_IO_FILE *) __attribute__ ((__nothrow__)); # 76 "/usr/include/stdio.h" 2 3 4 typedef __gnuc_va_list va_list; # 91 "/usr/include/stdio.h" 3 4 typedef __off_t off_t; # 103 "/usr/include/stdio.h" 3 4 typedef __ssize_t ssize_t; typedef _G_fpos_t fpos_t; # 161 "/usr/include/stdio.h" 3 4 # 1 "/usr/include/x86_64-linux-gnu/bits/stdio_lim.h" 1 3 4 # 162 "/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 int renameat (int __oldfd, __const char *__old, int __newfd, __const char *__new) __attribute__ ((__nothrow__)); extern FILE *tmpfile (void) ; # 206 "/usr/include/stdio.h" 3 4 extern char *tmpnam (char *__s) __attribute__ ((__nothrow__)) ; extern char *tmpnam_r (char *__s) __attribute__ ((__nothrow__)) ; # 224 "/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); # 249 "/usr/include/stdio.h" 3 4 extern int fflush_unlocked (FILE *__stream); # 263 "/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) ; # 292 "/usr/include/stdio.h" 3 4 # 303 "/usr/include/stdio.h" 3 4 extern FILE *fdopen (int __fd, __const char *__modes) __attribute__ ((__nothrow__)) ; # 316 "/usr/include/stdio.h" 3 4 extern FILE *fmemopen (void *__s, size_t __len, __const char *__modes) __attribute__ ((__nothrow__)) ; extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __attribute__ ((__nothrow__)) ; 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))); # 414 "/usr/include/stdio.h" 3 4 extern int vdprintf (int __fd, __const char *__restrict __fmt, __gnuc_va_list __arg) __attribute__ ((__format__ (__printf__, 2, 0))); extern int dprintf (int __fd, __const char *__restrict __fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3))); 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__)); # 445 "/usr/include/stdio.h" 3 4 extern int fscanf (FILE *__restrict __stream, __const char *__restrict __format, ...) __asm__ ("" "__isoc99_fscanf") ; extern int scanf (__const char *__restrict __format, ...) __asm__ ("" "__isoc99_scanf") ; extern int sscanf (__const char *__restrict __s, __const char *__restrict __format, ...) __asm__ ("" "__isoc99_sscanf") __attribute__ ((__nothrow__)) ; # 465 "/usr/include/stdio.h" 3 4 extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format, __gnuc_va_list __arg) __attribute__ ((__format__ (__scanf__, 2, 0))) ; extern int vscanf (__const char *__restrict __format, __gnuc_va_list __arg) __attribute__ ((__format__ (__scanf__, 1, 0))) ; extern int vsscanf (__const char *__restrict __s, __const char *__restrict __format, __gnuc_va_list __arg) __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__scanf__, 2, 0))); # 496 "/usr/include/stdio.h" 3 4 extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vfscanf") __attribute__ ((__format__ (__scanf__, 2, 0))) ; extern int vscanf (__const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vscanf") __attribute__ ((__format__ (__scanf__, 1, 0))) ; extern int vsscanf (__const char *__restrict __s, __const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vsscanf") __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__scanf__, 2, 0))); # 524 "/usr/include/stdio.h" 3 4 extern int fgetc (FILE *__stream); extern int getc (FILE *__stream); extern int getchar (void); # 552 "/usr/include/stdio.h" 3 4 extern int getc_unlocked (FILE *__stream); extern int getchar_unlocked (void); # 563 "/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); # 596 "/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) ; # 658 "/usr/include/stdio.h" 3 4 extern __ssize_t __getdelim (char **__restrict __lineptr, size_t *__restrict __n, int __delimiter, FILE *__restrict __stream) ; extern __ssize_t getdelim (char **__restrict __lineptr, size_t *__restrict __n, int __delimiter, FILE *__restrict __stream) ; extern __ssize_t getline (char **__restrict __lineptr, size_t *__restrict __n, FILE *__restrict __stream) ; 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); # 730 "/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); # 766 "/usr/include/stdio.h" 3 4 extern int fseeko (FILE *__stream, __off_t __off, int __whence); extern __off_t ftello (FILE *__stream) ; # 785 "/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); # 808 "/usr/include/stdio.h" 3 4 # 817 "/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/x86_64-linux-gnu/bits/sys_errlist.h" 1 3 4 # 27 "/usr/include/x86_64-linux-gnu/bits/sys_errlist.h" 3 4 extern int sys_nerr; extern __const char *__const sys_errlist[]; # 847 "/usr/include/stdio.h" 2 3 4 extern int fileno (FILE *__stream) __attribute__ ((__nothrow__)) ; extern int fileno_unlocked (FILE *__stream) __attribute__ ((__nothrow__)) ; # 866 "/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__)); # 906 "/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__)); # 936 "/usr/include/stdio.h" 3 4 # 2 "hello.c" 2 int main(int argc, char ** argv){ printf("hello\n"); return 0; }
