Created
February 27, 2013 16:25
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GDB for loop to close leaky fds
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| Leaks all over the place | |
| $ lsof -p $(pgrep leaky) | |
| COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME | |
| leaky 16095 laban cwd DIR 0,30 4096 10936796 /home/laban/devel/private/learning/c/leak_descriptors | |
| leaky 16095 laban rtd DIR 252,1 4096 2 / | |
| leaky 16095 laban txt REG 0,30 11267 10919599 /home/laban/devel/private/learning/c/leak_descriptors/leaky | |
| leaky 16095 laban mem REG 252,1 1811128 19136595 /lib/x86_64-linux-gnu/libc-2.15.so | |
| leaky 16095 laban mem REG 252,1 149280 19136932 /lib/x86_64-linux-gnu/ld-2.15.so | |
| leaky 16095 laban 0u CHR 136,19 0t0 22 /dev/pts/19 | |
| leaky 16095 laban 1u CHR 136,19 0t0 22 /dev/pts/19 | |
| leaky 16095 laban 2u CHR 136,19 0t0 22 /dev/pts/19 | |
| leaky 16095 laban 3r REG 252,1 2667 1575354 /etc/passwd | |
| leaky 16095 laban 4r REG 252,1 2667 1575354 /etc/passwd | |
| leaky 16095 laban 5r REG 252,1 1210 1575723 /etc/group | |
| leaky 16095 laban 6r REG 252,1 1210 1575723 /etc/group | |
| leaky 16095 laban 7r REG 252,1 1210 1575723 /etc/group | |
| leaky 16095 laban 8r REG 252,1 1210 1575723 /etc/group | |
| GDB closing fds | |
| $ sudo gdb -p $(pgrep leaky) | |
| GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04 | |
| Copyright (C) 2012 Free Software Foundation, Inc. | |
| License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> | |
| This is free software: you are free to change and redistribute it. | |
| There is NO WARRANTY, to the extent permitted by law. Type "show copying" | |
| and "show warranty" for details. | |
| This GDB was configured as "x86_64-linux-gnu". | |
| For bug reporting instructions, please see: | |
| <http://bugs.launchpad.net/gdb-linaro/>. | |
| Attaching to process 16095 | |
| Reading symbols from /home/laban/devel/private/learning/c/leak_descriptors/leaky...done. | |
| Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...Reading symbols from /usr/lib/debug/lib/x86_64-linux-gnu/libc-2.15.so...done. | |
| done. | |
| Loaded symbols for /lib/x86_64-linux-gnu/libc.so.6 | |
| Reading symbols from /lib64/ld-linux-x86-64.so.2...Reading symbols from /usr/lib/debug/lib/x86_64-linux-gnu/ld-2.15.so...done. | |
| done. | |
| Loaded symbols for /lib64/ld-linux-x86-64.so.2 | |
| 0x00007f253e7cf820 in __nanosleep_nocancel () at ../sysdeps/unix/syscall-template.S:82 | |
| 82 ../sysdeps/unix/syscall-template.S: No such file or directory. | |
| (gdb) set $max=8 | |
| (gdb) set $current=3 | |
| (gdb) while ($current < $max) | |
| > p close($current++) | |
| >end | |
| $5 = -1 | |
| $6 = 0 | |
| $7 = 0 | |
| $8 = 0 | |
| $9 = 0 | |
| (gdb) ^Z | |
| [2]+ Stopped sudo gdb -p $(pgrep leaky) | |
| What lsof thinks after GDB's done | |
| $ lsof -p $(pgrep leaky) | |
| COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME | |
| leaky 16095 laban cwd DIR 0,30 4096 10936796 /home/laban/devel/private/learning/c/leak_descriptors | |
| leaky 16095 laban rtd DIR 252,1 4096 2 / | |
| leaky 16095 laban txt REG 0,30 11267 10919599 /home/laban/devel/private/learning/c/leak_descriptors/leaky | |
| leaky 16095 laban mem REG 252,1 1811128 19136595 /lib/x86_64-linux-gnu/libc-2.15.so | |
| leaky 16095 laban mem REG 252,1 149280 19136932 /lib/x86_64-linux-gnu/ld-2.15.so | |
| leaky 16095 laban 0u CHR 136,19 0t0 22 /dev/pts/19 | |
| leaky 16095 laban 1u CHR 136,19 0t0 22 /dev/pts/19 | |
| leaky 16095 laban 2u CHR 136,19 0t0 22 /dev/pts/19 | |
| leaky 16095 laban 8r REG 252,1 1210 1575723 /etc/group | |
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