jay@SIRIUS.CTR.COLUMBIA.EDU (10/27/89)
I have been having problems using gdb to debug programs written using
the generic arithmetic vectors provided by the genclass utility of
libg++. I am using Version 1.35.0 of g++ and gcc on a Sun3/50 (with 68881)
running SunOS4.0,
with (what seems to be) version 1.35.1 of libg++, and version 3.2 of gdb.
The problem is that gdb gives me a segmentation fault and dumps core
whenever I try to print out an instance of the derived class doubleAVec.
(It does fine with the base class doubleVec.)
I generated the files double.Vec.[cc, h] and double.AVec.[cc,h] by:
genclass double val AVec
genclass double val Vec
The test program:
---------------------------------------------
#include <stream.h>
#include <double.AVec.h>
main (int argc, char* argv[])
{
doubleAVec control(10, 1.0);
}
---------------------------------------------
Following are the compilation and the gdb session:
cd /home/elara/jay/src/gnu/bug/
make -k
g++ -g -v -I. -c main.cc
g++ version 1.35.0
/usr/local/lib/gcc/SunOS_4.x/gcc-cpp -+ -v -I. -undef -D__GNU__ -D__GNUG__ -D__cplusplus -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 main.cc /tmp/cca09409.cpp
GNU CPP version 1.35
/usr/local/lib/gcc/SunOS_4.x/gcc-cc1plus /tmp/cca09409.cpp -quiet -dumpbase main.cc -noreg -version -G -o /tmp/cca09409.s
GNU C++ version 1.35.0 (68k, MIT syntax) compiled by GNU C version 1.35.
as -mc68020 /tmp/cca09409.s -o main.o
g++ -g -v -I. -c double.AVec.cc
g++ version 1.35.0
/usr/local/lib/gcc/SunOS_4.x/gcc-cpp -+ -v -I. -undef -D__GNU__ -D__GNUG__ -D__cplusplus -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 double.AVec.cc /tmp/cca09414.cpp
GNU CPP version 1.35
/usr/local/lib/gcc/SunOS_4.x/gcc-cc1plus /tmp/cca09414.cpp -quiet -dumpbase double.AVec.cc -noreg -version -G -o /tmp/cca09414.s
GNU C++ version 1.35.0 (68k, MIT syntax) compiled by GNU C version 1.35.
as -mc68020 /tmp/cca09414.s -o double.AVec.o
g++ -g -v -I. -c double.Vec.cc
g++ version 1.35.0
/usr/local/lib/gcc/SunOS_4.x/gcc-cpp -+ -v -I. -undef -D__GNU__ -D__GNUG__ -D__cplusplus -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 double.Vec.cc /tmp/cca09430.cpp
GNU CPP version 1.35
/usr/local/lib/gcc/SunOS_4.x/gcc-cc1plus /tmp/cca09430.cpp -quiet -dumpbase double.Vec.cc -noreg -version -G -o /tmp/cca09430.s
GNU C++ version 1.35.0 (68k, MIT syntax) compiled by GNU C version 1.35.
as -mc68020 /tmp/cca09430.s -o double.Vec.o
g++ -g -v -I. -o buggy main.o double.AVec.o double.Vec.o
g++ version 1.35.0
/usr/local/lib/gcc/SunOS_4.x/gcc-ld++ -o buggy -C -dc -dp -Bstatic /usr/local/lib/gcc/SunOS_4.x/crt0+.o /lib/Mcrt1.o main.o double.AVec.o double.Vec.o -lg++ /usr/local/lib/gcc/SunOS_4.x/gcc-gnulib -lg -lc
Compilation finished at Thu Oct 26 11:01:53
Current directory is /home/elara/jay/src/gnu/bug/
GDB 3.2, Copyright (C) 1988 Free Software Foundation, Inc.
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Reading symbol data from /home/elara/jay/src/gnu/bug/buggy...done.
Type "help" for a list of commands.
(gdb) break main
Reading in symbols for main.cc...done.
Breakpoint 1 at 0x220e: file main.cc, line 5.
(gdb) run
Starting program: /home/elara/jay/src/gnu/bug/buggy
Bpt 1, main (argc=1, argv=(char **) 0xefffd40) (main.cc line 7)
(gdb) list
2 #include <double.AVec.h>
3
4 main (int argc, char* argv[])
5 {
6 doubleAVec control(10, 1.0);
7 }
8
(gdb) info locals
control = {
Inferior Gdb segmentation fault (core dumped)
Am I missing something here?