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Fix for Bug#54478 "mysqld crashes during boot when running mtr with --debug option"

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The crash during boot was caused by a DBUG_PRINT statement in fill_schema_schemata() (in
sql_show.cc). This DBUG_PRINT statement contained several instances of %s in the format 
string and for one of these we gave a NULL pointer as the argument. This caused the
call to vsnprintf() to crash when running on Solaris.
      
The fix for this problem is to replace the call to vsnprintf() with my_vsnprintf()
which handles that a NULL pointer is passed as argumens for %s.

This patch also extends my_vsnprintf() to support %i in the format string.
This commit is contained in:
Olav Sandstaa
2010-09-15 13:33:22 +02:00
parent 3e70a34f30
commit 93e7e5f9d9
4 changed files with 20 additions and 13 deletions
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14
strings/my_vsnprintf.c
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@ -255,7 +255,7 @@ static char *process_int_arg(char *to, char *end, size_t length,
if ((to_length= (size_t) (end-to)) < 16 || length)
store_start= buff;
if (arg_type == 'd')
if (arg_type == 'd' || arg_type == 'i')
store_end= longlong10_to_str(par, store_start, -10);
else if (arg_type == 'u')
store_end= longlong10_to_str(par, store_start, 10);
@ -399,6 +399,7 @@ start:
args_arr[i].double_arg= va_arg(ap, double);
break;
case 'd':
case 'i':
case 'u':
case 'x':
case 'X':
@ -406,7 +407,7 @@ start:
case 'p':
if (args_arr[i].have_longlong)
args_arr[i].longlong_arg= va_arg(ap,longlong);
else if (args_arr[i].arg_type == 'd')
else if (args_arr[i].arg_type == 'd' || args_arr[i].arg_type == 'i')
args_arr[i].longlong_arg= va_arg(ap, int);
else
args_arr[i].longlong_arg= va_arg(ap, uint);
@ -458,6 +459,7 @@ start:
break;
}
case 'd':
case 'i':
case 'u':
case 'x':
case 'X':
@ -472,7 +474,7 @@ start:
if (args_arr[print_arr[i].arg_idx].have_longlong)
larg = args_arr[print_arr[i].arg_idx].longlong_arg;
else if (print_arr[i].arg_type == 'd')
else if (print_arr[i].arg_type == 'd' || print_arr[i].arg_type == 'i' )
larg = (int) args_arr[print_arr[i].arg_idx].longlong_arg;
else
larg= (uint) args_arr[print_arr[i].arg_idx].longlong_arg;
@ -615,8 +617,8 @@ size_t my_vsnprintf_ex(CHARSET_INFO *cs, char *to, size_t n,
to= process_dbl_arg(to, end, width, d, *fmt);
continue;
}
else if (*fmt == 'd' || *fmt == 'u' || *fmt == 'x' || *fmt == 'X' ||
*fmt == 'p' || *fmt == 'o')
else if (*fmt == 'd' || *fmt == 'i' || *fmt == 'u' || *fmt == 'x' ||
*fmt == 'X' || *fmt == 'p' || *fmt == 'o')
{
/* Integer parameter */
longlong larg;
@ -625,7 +627,7 @@ size_t my_vsnprintf_ex(CHARSET_INFO *cs, char *to, size_t n,
if (have_longlong)
larg = va_arg(ap,longlong);
else if (*fmt == 'd')
else if (*fmt == 'd' || *fmt == 'i')
larg = va_arg(ap, int);
else
larg= va_arg(ap, uint);