fork() function hook sample

Linux, FreeBSD

  $ gcc -Wall -fPIC -shared -o hook_fork.so hook_fork.c
  $ LD_PRELOD=/path/to/hook_fork.so ./target_program

Mac OS X

  $ gcc -Wall -fPIC -shared -o hook_fork.dylib hook_fork.c
  $ DYLD_INSERT_LIBRARIES=/path/to/hook_fork.dylib DYLD_FORCE_FLAT_NAMESPACE=Y ./target_program

  $ gdb ./target_program
  (gdb) set environment LD_PRELOAD=LD_PRELOD=/path/to/hook_fork.so
  (gdb) run

  $ gdbserver --wrapper env LD_PRELOAD=./hook_fork.so -- :2222 ./test_main

see also:

• http://sourceware.org/gdb/current/onlinedocs/gdb/Server.html