紀錄一下/proc/pid/maps的使用

在跑起來的一支程式，可用cat /proc/pid/maps 來看他的memory layout
(似乎只看的到user space的)

以下是這段code看到的資訊:

• address - The starting and ending address of the region in the process's address space
• permissions - rwx就不用講了，p代表的是private(not shared)，意義我也不懂@@
• offset - Where the memory area begins in the file that it is mapped to. An offset of 0
  means that the beginning of the memory area corresponds to the beginning of
  the file.
• device - If the region was mapped from a file, this is the major and minor device number (in hex) where the file lives.
• inode - If the region was mapped from a file, this is the file number.
• pathname - If the region was mapped from a file, this is the name of the file. This field is blank for anonymous mapped regions

reference : http://stackoverflow.com/questions/1401359/understanding-linux-proc-id-maps

其中這三個
應該是由上而下依序代表text(code) section, data section, BSS(uninitialization data) section

64bit的server上跑的@@
改天找個32bit machine跑對我來說比較容易