[Bug c/12315] New: stage1/cc1 segfaulted when --pg is used during bootstrap.

["ishikawa at yk dot rim dot or dot jp" <gcc-bugzilla at gcc dot gnu dot org>]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12315

           Summary: stage1/cc1 segfaulted when --pg is used during
                    bootstrap.
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ishikawa at yk dot rim dot or dot jp
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-pc-linux-gnu

During bootstrap, stage1/cc1 segfaulted.


(The bug seems triggered because I am trying to build
a C compiler with -pg, gprof feature. Not many people seem
to use gprof feature of the C compiler, I am afraid, and thus it 
probably is not
exercised much.)

I hope this gets fixed soon. 

========================================
THE BUG:
----------------------------------------

stage1/xgcc -Bstage1/ -B/usr/local/i686-pc-linux-gnu/bin/ -c   -march=athlon-xp
-mtune=athlon-xp -g -pg -O2  -DIN_GCC   -W -Wall -Wwrite-strings
-Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Werror
-fno-common   -DHAVE_CONFIG_H    -I. -I. -I/u2/tools/gcc-mainline-cvs/gcc/gcc
-I/u2/tools/gcc-mainline-cvs/gcc/gcc/.
-I/u2/tools/gcc-mainline-cvs/gcc/gcc/../include 
/u2/tools/gcc-mainline-cvs/gcc/gcc/cppexp.c -o cppexp.o
/u2/tools/gcc-mainline-cvs/gcc/gcc/cppexp.c: In function `num_trim':

/u2/tools/gcc-mainline-cvs/gcc/gcc/cppexp.c:1014: internal compiler error:
Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[2]: *** [cppexp.o] Error 1
make[2]: Leaving directory `/u2/tools/gcc-mainline-obj-dir/gcc'
make[1]: *** [stage2_build] Error 2
make[1]: Leaving directory `/u2/tools/gcc-mainline-obj-dir/gcc'
make: *** [bootstrap] Error 2


========================================
Quote from GDB session:
----------------------------------------
I checked the value of svrtx using gdb, and
found that it is 0 (NULL) and GET_CODE(svrtx) is called.


ishikawa@duron$  stage1/cc1 -quiet -v -I. -I.
-I/u2/tools/gcc-mainline-cvs/gcc/gcc -I/u2/tools/gcc-mainline-cvs/gcc/gcc/.
-I/u2/tools/gcc-mainline-cvs/gcc/gcc/../include -iprefix
/u2/tools/gcc-mainline-obj-dir/gcc/stage1/../lib/gcc/i686-pc-linux-gnu/3.4/
-isystem include -isystem stage1/include -isystem
/usr/local/i686-pc-linux-gnu/bin/include -DIN_GCC -DHAVE_CONFIG_H
/u2/tools/gcc-mainline-cvs/gcc/gcc/cppexp.c -quiet -dumpbase cppexp.c
-march=athlon-xp -mtune=athlon-xp -auxbase-strip cppexp.o -g -O2 -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic
-Wno-long-long -Werror -version -p -fno-common -o /tmp/ccTCMJqs.s
ignoring nonexistent directory "stage1/include"
ignoring nonexistent directory "/usr/local/i686-pc-linux-gnu/bin/include"
ignoring nonexistent directory
"/u2/tools/gcc-mainline-obj-dir/gcc/stage1/../lib/gcc/i686-pc-linux-gnu/3.4/include"
ignoring nonexistent directory
"/u2/tools/gcc-mainline-obj-dir/gcc/stage1/../lib/gcc/i686-pc-linux-gnu/3.4/../../../../i686-pc-linux-gnu/include"
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/lib/gcc/i686-pc-linux-gnu/3.4/include"
ignoring nonexistent directory "/usr/local/lib/../i686-pc-linux-gnu/include"
ignoring duplicate directory "."
ignoring duplicate directory "/u2/tools/gcc-mainline-cvs/gcc/gcc/."
#include "..." search starts here:
#include <...> search starts here:
 .
 /u2/tools/gcc-mainline-cvs/gcc/gcc
 /u2/tools/gcc-mainline-cvs/gcc/gcc/../include
 include
 /usr/local/include
 /usr/include
End of search list.
GNU C version 3.4 20030916 (experimental) (i686-pc-linux-gnu)
	compiled by GNU C version 3.3.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
/u2/tools/gcc-mainline-cvs/gcc/gcc/cppexp.c: In function `num_trim':

/u2/tools/gcc-mainline-cvs/gcc/gcc/cppexp.c:1014: internal compiler error:
Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
ishikawa@duron$ gdb stage1/cc1
GNU gdb 5.3-debian
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-linux"...
Breakpoint 1 at 0x814f12c: file /u2/tools/gcc-mainline-cvs/gcc/gcc/diagnostic.c,
line 593.
Breakpoint 2 at 0x8049804
Breakpoint 3 at 0x80495a4
(gdb) run   -quiet -v -I. -I. -I/u2/tools/gcc-mainline-cvs/gcc/gcc
-I/u2/tools/gcc-mainline-cvs/gcc/gcc/.
-I/u2/tools/gcc-mainline-cvs/gcc/gcc/../include -iprefix
/u2/tools/gcc-mainline-obj-dir/gcc/stage1/../lib/gcc/i686-pc-linux-gnu/3.4/
-isystem include -isystem stage1/include -isystem
/usr/local/i686-pc-linux-gnu/bin/include -DIN_GCC -DHAVE_CONFIG_H
/u2/tools/gcc-mainline-cvs/gcc/gcc/cppexp.c -quiet -dumpbase cppexp.c
-march=athlon-xp -mtune=athlon-xp -auxbase-strip cppexp.o -g -O2 -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic
-Wno-long-long -Werror -version -p -fno-common -o /tmp/ccTCMJqs.s
Starting program: /u2/tools/gcc-mainline-obj-dir/gcc/stage1/cc1 -quiet -v -I.
-I. -I/u2/tools/gcc-mainline-cvs/gcc/gcc -I/u2/tools/gcc-mainline-cvs/gcc/gcc/.
-I/u2/tools/gcc-mainline-cvs/gcc/gcc/../include -iprefix
/u2/tools/gcc-mainline-obj-dir/gcc/stage1/../lib/gcc/i686-pc-linux-gnu/3.4/
-isystem include -isystem stage1/include -isystem
/usr/local/i686-pc-linux-gnu/bin/include -DIN_GCC -DHAVE_CONFIG_H
/u2/tools/gcc-mainline-cvs/gcc/gcc/cppexp.c -quiet -dumpbase cppexp.c
-march=athlon-xp -mtune=athlon-xp -auxbase-strip cppexp.o -g -O2 -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic
-Wno-long-long -Werror -version -p -fno-common -o /tmp/ccTCMJqs.s
Breakpoint 2 at 0x4004b81e
Breakpoint 3 at 0x4004a8c0
ignoring nonexistent directory "stage1/include"
ignoring nonexistent directory "/usr/local/i686-pc-linux-gnu/bin/include"
ignoring nonexistent directory
"/u2/tools/gcc-mainline-obj-dir/gcc/stage1/../lib/gcc/i686-pc-linux-gnu/3.4/include"
ignoring nonexistent directory
"/u2/tools/gcc-mainline-obj-dir/gcc/stage1/../lib/gcc/i686-pc-linux-gnu/3.4/../../../../i686-pc-linux-gnu/include"
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/lib/gcc/i686-pc-linux-gnu/3.4/include"
ignoring nonexistent directory "/usr/local/lib/../i686-pc-linux-gnu/include"
ignoring duplicate directory "."
ignoring duplicate directory "/u2/tools/gcc-mainline-cvs/gcc/gcc/."
#include "..." search starts here:
#include <...> search starts here:
 .
 /u2/tools/gcc-mainline-cvs/gcc/gcc
 /u2/tools/gcc-mainline-cvs/gcc/gcc/../include
 include
 /usr/local/include
 /usr/include
End of search list.
GNU C version 3.4 20030916 (experimental) (i686-pc-linux-gnu)
	compiled by GNU C version 3.3.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096

Program received signal SIGSEGV, Segmentation fault.
0x081c67b5 in profile_function (file=0x86660a0)
    at /u2/tools/gcc-mainline-cvs/gcc/gcc/final.c:1440
1440	  if (sval && GET_CODE (svrtx) == REG)
(gdb) list
1435	    }
1436	
1437	  function_section (current_function_decl);
1438	
1439	#if defined(ASM_OUTPUT_REG_PUSH)
1440	  if (sval && GET_CODE (svrtx) == REG)
1441	    ASM_OUTPUT_REG_PUSH (file, REGNO (svrtx));
1442	#endif
1443	
1444	#if defined(STATIC_CHAIN_INCOMING_REGNUM) && defined(ASM_OUTPUT_REG_PUSH)
(gdb) print sval
$1 = 1
(gdb) print svrtx
$2 = 0x0
(gdb) quit
A debugging session is active.
Do you still want to close the debugger?(y or n) y
ishikawa@duron$ 

cf.
Quote from "pr -n cppexp.c":
  995	/* Clears the unused high order bits of the number pointed to by PNUM.  */
  996	static cpp_num
  997	num_trim (cpp_num num, size_t precision)
  998	{
  999	  if (precision > PART_PRECISION)
 1000	    {
 1001	      precision -= PART_PRECISION;
 1002	      if (precision < PART_PRECISION)
 1003		num.high &= ((cpp_num_part) 1 << precision) - 1;
 1004	    }
 1005	  else
 1006	    {
 1007	      if (precision < PART_PRECISION)
 1008		num.low &= ((cpp_num_part) 1 << precision) - 1;
 1009	      num.high = 0;
 1010	    }
 1011	
 1012	  return num;
 1013	}
 1014	




This is how I configured GCC for bootstrap.
(I updated my local source CVS tree a few hours ago.)

:
#
set -vx

LANG=C
LC_ALL=C
export LANG
export LC_ALL

make distclean clean

rm config.cache

#
#--enable-languages=c
#
# Use absolute pathnaes
# env CC=gcc-cvs
#
env CC=gcc /u2/tools/gcc-mainline-cvs/gcc/configure  \
	--enable-languages=c,c++,objc	\
	--program-suffix=-mainline-cvs --enable-nls
#
#env CC=gcc-cvs make BOOT_CFLAGS="-g -pg -O2 -ftest-coverage -fprofile-arcs"
bootstrap
# doesn't work
#
env CC="gcc" make BOOT_CFLAGS="-march=athlon-xp -mtune=athlon-xp -g -pg -O2 "
bootstrap
# bootstrap-lean