The implementation method of performance Statistics of Cpicket + function under AIX
In AIX, the xlc compiler has an option-qfunctrace, and programs compiled with this option automatically call the following custom function at the entrance and exit of each function.
Extern "C" void
_ _ func_trace_enter (const char * const proc_name
Const char * const file_name
Const int line_no
Void * * const id)
Extern "C" void
_ _ func_trace_exit (const char * const proc_name
Const char * const file_name
Const int line_no
Void * * const id)
Extern "C" void
_ _ func_trace_catch (const char * const proc_name
Const char * const file_name
Const int line_no
Void * * const id)
Execute _ _ func_trace_enter () before the function call, and _ _ func_trace_exit () after the function returns normally. If the function is thrown through a throw exception, execute _ _ func_trace_catch () where the exception is caught by catch, but encounter catch (...). The capture will not be performed. It is worth noting that if throw is thrown, _ _ func_trace_exit () will not be triggered.
Using this function, you can achieve the effect of performance statistics without modifying the source program. The procedure is as follows.
Tr.cpp is a custom function entry and exit program, which passes through each function when it is executed. Compiled into libfunctr.so.
# include
# include
# include
# include
Using std::vector
Using std::string
Using std::clog
Using std::endl
Extern "C" void print_trace ()
Struct Stat
{
Int lvl
String name
Long stm
Long etm
Long oitv
Stat (int l, const string& s, long st): lvl (l), name (s), stm (st), etm (0), oitv (0) {}
}
Static vector tracev
Static int clvl = 0
Extern "C" void
_ _ func_trace_enter (const char * const proc_name
Const char * const file_name
Const int line_no
Void * * const id)
{
/ / printf ("{% s (% s% d)% p% s\ n", proc_name, file_name, line_no, id [0], (char*) * id)
Struct timeval nowtm
Gettimeofday (& nowtm, NULL)
+ + clvl
Tracev.push_back (Stat (clvl, string (proc_name) + "():" + file_name, nowtm.tv_sec * 1000000 + nowtm.tv_usec))
}
Extern "C" void
_ _ func_trace_exit (const char * const proc_name
Const char * const file_name
Const int line_no
Void * * const id)
{
/ / printf ("}% s (% SVA% d)% p% s\ n", proc_name, file_name, line_no, id [0], (char*) * id)
Struct timeval nowtm
Int itv
Gettimeofday (& nowtm, NULL)
Auto iter = tracev.end ()-1
While (iter- > etm! = 0)
-- iter
Iter- > etm = nowtm.tv_sec * 1000000 + nowtm.tv_usec
Itv = iter- > etm-iter- > stm-iter- > oitv
For (auto s = tracev.begin (); swords tracev.end (); slots +)
{
If (s-> etm = = 0)
S-> oitv + = itv
}
-- clvl
If (clvl = = 0)
Print_trace ()
}
Extern "C" void print_trace ()
{
Time_t t
Char buf [30]
For (auto s = tracev.begin (); swords tracev.end (); slots +)
{
Clog
