| Bug #1168 | mysql_close gets SIGBUG on MacOSX | ||
|---|---|---|---|
| Submitted: | 31 Aug 2003 1:14 | Modified: | 10 Dec 2003 18:00 |
| Reporter: | Max Matveev | Email Updates: | |
| Status: | Can't repeat | Impact on me: | |
| Category: | MySQL Server | Severity: | S2 (Serious) |
| Version: | 4.0.14` | OS: | MacOS (macosx 10.2.6) |
| Assigned to: | Michael Widenius | CPU Architecture: | Any |
[10 Dec 2003 18:00]
Michael Widenius
Not enough information was provided for us to be able to handle this bug. Please re-read the instructions at http://bugs.mysql.com/how-to-report.php If you can provide more information, feel free to add it to this bug and change the status back to 'Open'. Thank you for your interest in MySQL. Additional info: I tested this with MySQL 4.0.16, but didn't get an sigbus errors The only reason I can think of why this would happen is if your include files is not in line with your library files. Please update include and library files to MySQL 4.0.16 and try again. If you still get this problem, please try compiling MySQL with 'configure --debug' and try to get a back trace (with gdb) for the crash you get.
Description: If a user attempts to provide its own store for MYSQL handle, mysql_close get SIGBUS on MacOSX If I compile the following program: #include <stdio.h> #include <unistd.h> #include <mysql/mysql.h> #include <mysql/mysqld_error.h> int main (int ac, char *av[]) { int i; char *user = NULL; char *dbname = NULL; char *passwd = NULL; MYSQL *msh = NULL; MYSQL mm; while ((i = getopt (ac, av, "Iiu:p:d:")) >= 0) { switch (i) { case 'I': msh = calloc (1, sizeof(mm)); break; case 'i': msh = &mm; memset (&mm, 0, sizeof(mm)); break; case 'u': user = optarg; break; case 'p': passwd = optarg; break; case 'd': dbname = optarg; break; default: exit (1); } } msh = mysql_init (msh); printf ("Init handle\n"); printf ("About to connect as %s to db %s\n", user, dbname); if ( ! mysql_real_connect (msh, 0, user, passwd, dbname, 0, 0, 0) ) { printf ("Connection Failed: %s\n", mysql_error(msh)); } else { printf ("Connected\n"); } mysql_close(msh); puts ("BYE"); return(0); } Using Makefile core:~/src/xam/test >cat Makefile CFLAGS = $(shell /usr/local/mysql/bin/mysql_config --cflags) LDLIBS = $(shell /usr/local/mysql/bin/mysql_config --libs) core:~/src/xam/test >make sql cc -I'/usr/local/mysql/include' sql.c -L'/usr/local/mysql/lib' -lmysqlclient -lz -lm -o sql sql.c: In function `main': sql.c:20: warning: assignment makes pointer from integer without a cast core:~/src/xam/test >./sql -u root -i Init handle About to connect as root to db (null) Connected BYE Bus error core:~/src/xam/test >./sql -u root -I Init handle About to connect as root to db (null) Connected BYE core:~/src/xam/test >./sql -u root Init handle About to connect as root to db (null) Connected BYE The symptoms sort of suggest that mysql_close attempt to free the memory unconditionally, corrupts the heap and then exit dies with SIGBUS How to repeat: Compile, run as in example.