Hi, I'm having a number of problems with shared libraries that worked fine in 5.0 but are problems in 5.1.
I haven't seen anyone else with similar problems.. I'm wondering if it's to do with my system setup, or the way I'm linking my libraries. SUMMARY ======= Problem 1 (Linux 2.4/libc 2.2.4/Debian Woody): value of a double (in static data section of exe) get's changed when run through 5.1. Problem 2 (Linux 2.4/libc 2.2.4/Debian Woody): Symbol addresses from shared library are coming up as offsets from 0 rather than offsets from start of text segment. Problem 3 (Solaris 8): symbol/address mapping seems to only work in one direction for shared libaries. (EG can get address from line, but not line from address). ------------------ DETAIL ====== Problem 1 (Linux 2.4/libc 2.2.4/Debian Woody): value of a double (in static data section of exe) get's changed when run through 5.1. Ok in 5.0: ---------------- $ /opt/gdb-5.0/bin/gdb tester GNU gdb 5.0 (UI_OUT) Copyright 2000 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 "i686-pc-linux-gnu"... (gdb) break mogtest Breakpoint 1 at 0x804b882: file main.cpp, line 95. (gdb) r Starting program: /home/andrewd/gomic/engine/tester [New Thread 1024 (LWP 29708)] [Switching to Thread 1024 (LWP 29708)] Breakpoint 1, mogtest () at main.cpp:95 95 double d = 3.5; (gdb) n 96 var x; (gdb) p d $1 = 3.5 (gdb) ---------------- But not in 5.1: ---------------- $ /opt/gdb-5.1/bin/gdb tester GNU gdb 5.1 Copyright 2001 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 "i686-pc-linux-gnu"... (gdb) break mogtest Breakpoint 1 at 0x804b882: file main.cpp, line 95. (gdb) r Starting program: /home/andrewd/gomic/engine/tester Error while mapping shared library sections: liboraofs.so: Success. [New Thread 1024 (LWP 29710)] [Switching to Thread 1024 (LWP 29710)] Breakpoint 1, mogtest () at main.cpp:95 95 double d = 3.5; (gdb) n 96 var x; (gdb) p d $1 = -nan(0x8000000000000) (gdb) ---------------- Problem 2 (Linux 2.4/libc 2.2.4/Debian Woody) Symbol addresses from shared library are coming up as offsets from 0 rather than offsets from start of text segment. ---------- $ /opt/gdb-5.1/bin/gdb tester GNU gdb 5.1 Copyright 2001 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 "i686-pc-linux-gnu"... (gdb) break main Breakpoint 1 at 0x8049141: file main.cpp, line 113. (gdb) r Starting program: /home/andrewd/gomic/engine/tester Error while mapping shared library sections: libgomic.so: Success. b Breakpoint 1, main (argc=1, argv=0xbffffcd4) at main.cpp:113 113 signal(SIGINT, sigint); (gdb) break var.cpp:495 Breakpoint 2 at 0x33a7d: file var.cpp, line 495. (gdb) c Continuing. warning: Cannot insert breakpoint 2: Cannot access memory at address 0x33a7d (gdb) delete 2 (gdb) call getpid() $1 = 718 (gdb) shell cat /proc/718/maps 08048000-0804a000 r-xp 00000000 03:05 16403 /home/andrewd/gomic/engine/tester 0804a000-0804c000 rw-p 00001000 03:05 16403 /home/andrewd/gomic/engine/tester 0804c000-080c4000 rwxp 00000000 00:00 0 40000000-40014000 r-xp 00000000 03:02 20584 /lib/ld-2.2.4.so 40014000-40015000 rw-p 00013000 03:02 20584 /lib/ld-2.2.4.so 40015000-40016000 rwxp 00000000 00:00 0 40016000-40088000 r-xp 00000000 03:05 16398 /home/andrewd/gomic/engine/libgomic.so 40088000-40098000 rw-p 00071000 03:05 16398 /home/andrewd/gomic/engine/libgomic.so 40098000-40099000 rw-p 00000000 00:00 0 4009c000-40113000 r-xp 00000000 03:02 18913 /usr/lib/libstdc++.so.3.0.2 40113000-40127000 rw-p 00076000 03:02 18913 /usr/lib/libstdc++.so.3.0.2 40127000-4012c000 rw-p 00000000 00:00 0 4012c000-4014d000 r-xp 00000000 03:02 20606 /lib/libm-2.2.4.so 4014d000-4014e000 rw-p 00020000 03:02 20606 /lib/libm-2.2.4.so 4014e000-4014f000 rw-p 00000000 00:00 0 4014f000-40155000 r-xp 00000000 03:02 20674 /lib/libgcc_s.so.1 40155000-40157000 rw-p 00005000 03:02 20674 /lib/libgcc_s.so.1 40157000-4026f000 r-xp 00000000 03:02 20595 /lib/libc-2.2.4.so 4026f000-40275000 rw-p 00117000 03:02 20595 /lib/libc-2.2.4.so 40275000-4027a000 rw-p 00000000 00:00 0 4027a000-4027c000 r-xp 00000000 03:02 20605 /lib/libdl-2.2.4.so 4027c000-4027e000 rw-p 00001000 03:02 20605 /lib/libdl-2.2.4.so bfffe000-c0000000 rwxp fffff000 00:00 0 (gdb) p 0x40016000 + 0x33a7d $2 = 1074043517 (gdb) b *1074043517 Breakpoint 3 at 0x40049a7d (gdb) c Continuing. Test:test_var_comparison(1 runs): 0.001327 secs Test:test_dynarray(1 runs): 0.000469 secs Test:test_del(1 runs): 0.000032 secs Breakpoint 3, 0x40049a7d in ?? () (gdb) ------------ in 5.0 ------------ andrewd@scrappy:~/gomic/engine$ /opt/gdb-5.0/bin/gdb tester GNU gdb 5.0 (UI_OUT) Copyright 2000 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 "i686-pc-linux-gnu"... (gdb) break main Breakpoint 1 at 0x8049141: file main.cpp, line 113. (gdb) r Starting program: /home/andrewd/gomic/engine/tester Breakpoint 1, main (argc=1, argv=0xbffffcd4) at main.cpp:113 113 signal(SIGINT, sigint); (gdb) break var.cpp:495 Breakpoint 2 at 0x40049a7d: file var.cpp, line 495. (gdb) c Continuing. Test:test_var_comparison(1 runs): 0.001331 secs Test:test_dynarray(1 runs): 0.000467 secs Test:test_del(1 runs): 0.000033 secs Breakpoint 2, _ZNK3vardvEd (this=0xbffffbc0, x=2.5) at var.cpp:495 495 return l; (gdb) ------------- Problem 3 (Solaris 8) symbol/address mapping seems to only work in one direction for shared libaries. (EG can get address from line, but not line from address). $ /opt/gdb-5.1/bin/gdb tester GNU gdb 5.1 Copyright 2001 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 "sparc-sun-solaris2.8"... (gdb) b main Breakpoint 1 at 0x1130c: file main.cpp, line 103. (gdb) r Starting program: /home/andrewd/gt_cpp/engine/tester Breakpoint 1, main (argc=1, argv=0xffbef9e4) at main.cpp:103 103 signal(SIGINT, sigint); (gdb) b var.cpp:495 Breakpoint 2 at 0xf993f8b8: file var.cpp, line 495. (gdb) c Continuing. Test:test_var_comparison(1 runs): 0.001972 secs Test:test_dynarray(1 runs): 0.000660 secs Test:test_del(1 runs): 0.000034 secs Program received signal SIGTRAP, Trace/breakpoint trap. 0xf993f8b8 in ?? () (gdb) bt #0 0xf993f8b8 in ?? () #1 0xf9953adc in ?? () #2 0x0001146c in main (argc=1, argv=0x11c00) at cppmv.h:62 (gdb) info line var.cpp:495 Line 495 of "var.cpp" starts at address 0xf993f8b8 <_ZNK3vardvEd+56> and ends at 0xf993f8e0 <_ZNK3vardvEd+96>. (gdb) info line *0xf993f8b8 No line number information available for address 0xf993f8b8 ------------ I'm building with: g++-3.0 -v -g -pipe -shared -o libgomic.so basefuncs.o basefuncs_test.o charset.o date.o dynarraytest.o file.o iconv.o selectlist.o var.o vocmanager.o drivers/csv.o drivers/dir.o driverlist.o call.o error.o oconv.o format.o execute.o matrix.o locate.o var_test.o locate_test.o file_test.o transaction.o msl.o liboraofs.so Reading specs from /usr/lib/gcc-lib/i386-linux/3.0.2/specs Configured with: ../src/configure -v --enable-languages=c,c++,java,f77,proto,objc --prefix=/usr --infodir=/share/info --mandir=/share/man --enable-shared --with-gnu-as --with-gnu-ld --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --disable-checking --enable-threads=posix --enable-java-gc=boehm --with-cpp-install-dir=bin --enable-objc-gc i386-linux Thread model: posix gcc version 3.0.2 20010922 (Debian prerelease) /usr/lib/gcc-lib/i386-linux/3.0.2/collect2 -m elf_i386 -shared -o libgomic.so /usr/lib/gcc-lib/i386-linux/3.0.2/../../../crti.o /usr/lib/gcc-lib/i386-linux/3.0.2/crtbeginS.o -L/usr/lib/gcc-lib/i386-linux/3.0.2 -L/usr/lib/gcc-lib/i386-linux/3.0.2/../../.. basefuncs.o basefuncs_test.o charset.o date.o dynarraytest.o file.o iconv.o selectlist.o var.o vocmanager.o drivers/csv.o drivers/dir.o driverlist.o call.o error.o oconv.o format.o execute.o matrix.o locate.o var_test.o locate_test.o file_test.o transaction.o msl.o liboraofs.so -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc-lib/i386-linux/3.0.2/crtendS.o /usr/lib/gcc-lib/i386-linux/3.0.2/../../../crtn.o And: g++-3.0 -v -g -pipe -o tester -L. -lgomic main.o stacktrace.o Reading specs from /usr/lib/gcc-lib/i386-linux/3.0.2/specs Configured with: ../src/configure -v --enable-languages=c,c++,java,f77,proto,objc --prefix=/usr --infodir=/share/info --mandir=/share/man --enable-shared --with-gnu-as --with-gnu-ld --with-system-zlib --enable-long-long --enable-nls --without-included-gettext --disable-checking --enable-threads=posix --enable-java-gc=boehm --with-cpp-install-dir=bin --enable-objc-gc i386-linux Thread model: posix gcc version 3.0.2 20010922 (Debian prerelease) /usr/lib/gcc-lib/i386-linux/3.0.2/collect2 -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o tester /usr/lib/gcc-lib/i386-linux/3.0.2/../../../crt1.o /usr/lib/gcc-lib/i386-linux/3.0.2/../../../crti.o /usr/lib/gcc-lib/i386-linux/3.0.2/crtbegin.o -L. -L/usr/lib/gcc-lib/i386-linux/3.0.2 -L/usr/lib/gcc-lib/i386-linux/3.0.2/../../.. -lgomic main.o stacktrace.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc-lib/i386-linux/3.0.2/crtend.o /usr/lib/gcc-lib/i386-linux/3.0.2/../../../crtn.o It's a problem with both g++ 3.0.2 and 2.95.4. ------------ Can someone give me some pointers as to what could be wrong / how to debug / is it a gdb problem? Thanks Brendan _______________________________________________ Bug-gdb mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-gdb
