Tool to trace local function calls in Linux

参考：http://stackoverflow.com/questions/311840/tool-to-trace-local-function-calls-in-linux

里面有一个对应的工具：

https://github.com/leviathansecurity/ftrace

接下来看一下对应的代码。

- main
 - !opts.attach
 - examine_process
 - MapElf32 / MapElf64
 - BuildSyms
 - get_address_space
 - callstack_init
 - for (;;)
 - ptrace (PTRACE_SINGLESTEP
 - callstack_push
 - set_breakpoint
 - ptrace(PTRACE_PEEKTEXT
 - opts.attach
 - ptrace(PTRACE_ATTACH
 - get_path
 - validate_em_type
 - examine_process