[Bug debug/14444] no proper debugging information for local variable

["max-gccbug at openchat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From max-gccbug at openchat dot com  2004-05-05 13:44 -------
have the same problem with 3.2.2 for the following test program 
 
#include <stdarg.h> 
#include <stdio.h> 
#include <string> 
using namespace std; 
 
class Sprintf : public string 
{ 
public: 
  Sprintf(string const &s) : string(s) {} 
  Sprintf(const char *format, ...); 
}; 
 
 
Sprintf::Sprintf (const char *format, ...) 
{ 
  char mybuf[8192]; 
  int len = sizeof(mybuf)-1; 
  va_list v; 
  va_start(v, format); 
  vsnprintf(mybuf, len, format, v); 
  *this = string(mybuf); 
  va_end(v); 
} 
 
main() 
{ 
    printf("%s\n", Sprintf("This is line number %d", i).c_str()); 
} 
g++ -g -O0 test.cpp 
 
gdb a.out 
 
GNU gdb Red Hat Linux (5.3post-0.20021129.29rh) 
Copyright 2003 Free Software Foundation, Inc. 
GDB is free software, covered by the GNU General Public License, and you are 
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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-redhat-linux"... 
(gdb) b main 
Breakpoint 1 at 0x8048a1d: file test.cpp, line 27. 
(gdb) run 
Starting program: /home/max/a.out 
 
Breakpoint 1, main () at test.cpp:27 
27          printf("%s\n", Sprintf("This is line number %d", 20).c_str()); 
(gdb) s 
Sprintf (this=0xbffff2e0, format=0x8048b8c "This is line number %d") 
    at test.cpp:15 
15      { 
(gdb) n 
17        int len = sizeof(mybuf)-1; 
(gdb) n 
19        va_start(v, format); 
(gdb) n 
20        vsnprintf(mybuf, len, format, v); 
(gdb) n 
21        *this = string(mybuf); 
(gdb) info locals 
No locals. 
(gdb)  
 
g++ -v 
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/specs 
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
--infodir=/usr/share/info --enable-shared --enable-threads=posix 
--disable-checking --with-system-zlib --enable-__cxa_atexit 
--host=i386-redhat-linux 
Thread model: posix 
gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5) 
 
Note the "int len" was added when trying to troubleshoot the problem, the bug 
exists even if there is no int len local variable. 
 
 
 
                                                                                

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14444