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From: Peter Schmid <schmid@snake.iap.physik.tu-darmstadt.de> To: gcc-gnats@gcc.gnu.org Subject: debug/5433: Severe debugging problems Date: Sat, 19 Jan 2002 08:16:00 -0000 [thread overview] Message-ID: <200201191611.RAA04897@snake.iap.physik.tu-darmstadt.de> (raw) >Number: 5433 >Category: debug >Synopsis: Severe debugging problems >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Sat Jan 19 08:16:00 PST 2002 >Closed-Date: >Last-Modified: >Originator: Peter Schmid >Release: 3.1 20020117 (experimental) >Organization: TU Darmstadt >Environment: System: Linux kiste 2.4.17 #7 Thu Jan 3 17:21:51 CET 2002 i686 unknown Architecture: i686 SuSE 7.3 glibc 2.2.4 host: i686-pc-linux-gnu build: i686-pc-linux-gnu target: i686-pc-linux-gnu configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads --enable-languages=c,c++,f77,objc >Description: Debugging c++ code on the main line does not work. For example, consider the following code tl.C. The most recent gdb snapshot emits the strange "Locale = {static none = Internal: global symbol `_ZNSt6locale4noneE' found in ../../../../gcc/libstdc++-v3/src/locale.cc psymtab but not in symtab. _ZNSt6locale4noneE may be an inlined function, or may be a template function (if a template, try specifying an instantiation: _ZNSt6locale4noneE<type>)" message. Printing the variable Locale does not work, either. There is a "Cannot access memory at address 0x0" message, all following methods and variables are not accessible by the debugger, making debugging of c++ programs nearly impossible. The most recent gdb 5.1 snapshot does not emit the psymtab/symtab message but the problems encountered are the same. >How-To-Repeat: Source code tl.C #include <locale> int main() { std::locale Locale(""); int i; } Compiling tl.C g++ -v -o tl tl.C -W -Wall -g Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/specs Configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads --enable-languages=c,c++,f77,objc Thread model: posix gcc version 3.1 20020117 (experimental) /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -W -Wall -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ tl.C -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase tl.C -g -W -Wall -version -o /tmp/cca5id1E.s GNU CPP version 3.1 20020117 (experimental) (cpplib) (i386 Linux/ELF) GNU C++ version 3.1 20020117 (experimental) (i686-pc-linux-gnu) compiled by GNU C version 3.1 20020117 (experimental). ignoring nonexistent directory "NONE/include" ignoring nonexistent directory "/usr/local/i686-pc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/local/include/g++-v3 /usr/local/include/g++-v3/i686-pc-linux-gnu /usr/local/include/g++-v3/backward /usr/local/include /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/include /usr/include End of search list. tl.C: In function `int main()': tl.C:6: warning: unused variable `int i' /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/../../../../i686-pc-linux-gnu/bin/as -V -Qy -o /tmp/cccnyR3V.o /tmp/cca5id1E.s GNU assembler version 2.11.92.0.12.3 (i686-pc-linux-gnu) using BFD version 2.11.92.0.12.3 20011121 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/collect2 -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o tl /usr/lib/crt1.o /usr/lib/crti.o /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/crtbegin.o -L/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1 -L/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/../../../../i686-pc-linux-gnu/lib -L/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/../../.. /tmp/cccnyR3V.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/crtend.o /usr/lib/crtn.o Debugging tl.C GNU gdb 20020118 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) b main Breakpoint 1 at 0x8048990: file tl.C, line 5. (gdb) r Starting program: ./tl Breakpoint 1, main () at tl.C:5 (gdb) n (gdb) info locals Locale = {static none = Internal: global symbol `_ZNSt6locale4noneE' found in ../../../../gcc/libstdc++-v3/src/locale.cc psymtab but not in symtab. _ZNSt6locale4noneE may be an inlined function, or may be a template function (if a template, try specifying an instantiation: _ZNSt6locale4noneE<type>). (gdb) p Locale $1 = {static none = 0, static ctype = 1, static numeric = 2, static collate = 4, static time = 8, static monetary = 16, static messages = 32, static all = 63, _M_impl = 0x804ac08, static _S_classic = Cannot access memory at address 0x0 (gdb) >Fix: >Release-Note: >Audit-Trail: >Unformatted:
next reply other threads:[~2002-01-19 16:16 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-01-19 8:16 Peter Schmid [this message] 2002-01-19 8:36 Daniel Jacobowitz 2002-03-16 14:47 dberlin
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