Description:
When ulimit -n is high libmysqld will crash on a second mysql_library_init (after the first was ended cleanly). This only affects 5.0, not 5.1. Tested on 5.0.22 and 5.0.81.
Segfault only happens without gdb. Stack is as follows:
Program terminated with signal 11, Segmentation fault.
[New process 23333]
#0 memcpy () at ../sysdeps/x86_64/memcpy.S:420
420 movq (%rsi), %rax
(gdb) bt
#0 memcpy () at ../sysdeps/x86_64/memcpy.S:420
#1 0x0000000000431bc3 in my_set_max_open_files (files=<value optimized out>)
at my_file.c:129
#2 0x000000000041ae6e in init_common_variables (argv=0x23035d0, argc=8)
at ../sql/mysqld.cc:2630
#3 init_embedded_server (argc=8, argv=0xa13a80, groups=<value optimized out>)
at lib_sql.cc:469
#4 0x0000000000416883 in mysql_server_init (argc=8, argv=0xa13a80,
groups=0xa13ae0) at libmysql.c:162
#5 0x0000000000406ca0 in mysql_interface::server_init (this=0x7fff688eec30,
directoryVal=@0x7fff688eeca0) at cust_test.cpp:92
#6 0x0000000000406e59 in main () at cust_test.cpp:19
How to repeat:
1. Get test file (will attach shortly)
2. g++ cust_test.cpp -o cust_test -g -lz `mysql-5.0.81-debug/bin/mysql_config --include --libmysqld-libs`
3. ulimit -n 8192
4. ./cust_test
[Segfault here]
Description: When ulimit -n is high libmysqld will crash on a second mysql_library_init (after the first was ended cleanly). This only affects 5.0, not 5.1. Tested on 5.0.22 and 5.0.81. Segfault only happens without gdb. Stack is as follows: Program terminated with signal 11, Segmentation fault. [New process 23333] #0 memcpy () at ../sysdeps/x86_64/memcpy.S:420 420 movq (%rsi), %rax (gdb) bt #0 memcpy () at ../sysdeps/x86_64/memcpy.S:420 #1 0x0000000000431bc3 in my_set_max_open_files (files=<value optimized out>) at my_file.c:129 #2 0x000000000041ae6e in init_common_variables (argv=0x23035d0, argc=8) at ../sql/mysqld.cc:2630 #3 init_embedded_server (argc=8, argv=0xa13a80, groups=<value optimized out>) at lib_sql.cc:469 #4 0x0000000000416883 in mysql_server_init (argc=8, argv=0xa13a80, groups=0xa13ae0) at libmysql.c:162 #5 0x0000000000406ca0 in mysql_interface::server_init (this=0x7fff688eec30, directoryVal=@0x7fff688eeca0) at cust_test.cpp:92 #6 0x0000000000406e59 in main () at cust_test.cpp:19 How to repeat: 1. Get test file (will attach shortly) 2. g++ cust_test.cpp -o cust_test -g -lz `mysql-5.0.81-debug/bin/mysql_config --include --libmysqld-libs` 3. ulimit -n 8192 4. ./cust_test [Segfault here]