我在Windows上使用MinGW GCC编译器。如果我将-pg开关添加到编译器,我可以使用配置文件数据生成EXE和DLL。
生成gmon.out。但问题是,当我使用
时gprof myprogram.exe gmon.out
我没有配置文件输出(除了表格标题和其他文本)。
gprof mydll.dll gmon.out
我只获取该特定DLL的输出,但不获取主exe的输出。
也许exe和dll都想生成相同的文件而dll赢了。
目标是在一个输出中获取EXE和DLL中的函数的统计信息。
gprof能做到吗?如果没有,是否有任何工具可以在Windows上执行此操作?
答案 0 :(得分:0)
似乎gprof无法做到这一点。 MinGw中没有sprof。所以推出了我自己的探查器。
我使用-finstrument-functions
因此,将分别在每个函数之前和之后调用两个函数__cyg_profile_func_enter
和__cyg_profile_func_exit
。
实际的分析函数被导出到DLL中并在这些函数中调用,并且DLL链接到所讨论的所有EXE和DLL。所以它可以分析它们两个
库中的代码是这样的(删除了杂乱:断言,错误检查,简化函数调用以获得清晰度)。
static void proflib_init()
{
atexit(proflib_finalize);
empty(callstack);
empty(trackingData);
proflibIntialized = 1;
}
static void proflib_finalize()
{
/* Make a log. */
FILE *f = fopen("proflib_log.txt", "wt");
int i;
sortBySelftime(trackingData);
fprintf(f, "%10s%15s%15s%15s\n", "Func name", "Cumulative", "Self time", "Count");
for (i = 0; i < getlength(trackingData); i++)
{
FunctionTimeInfo *fri = trackingData[i];
fprintf(f, "%10p%15"PRIu64"%15"PRIu64"%20d\n", fri->addr, fri->cumulative, fri->selfTime, fri->count);
}
fclose(f);
}
void proflib_func_enter(void *func, void *caller)
{
FunctionTimeInfo elem;
long long pc;
pc = rdtsc(); /* Read timestamp counter from CPU. */
if (!is_prolib_initialized())
{
proflib_init();
}
/* Register self time as control moves to the child function. */
if (!isEmpty(callstack))
{
FunctionTimeInfo *top = gettop(callstack);
top->selfTime += pc - top->selfSample;
}
elem.addr = func; /* Address of function. */
elem.cumulative = pc; /* Time spent in function and functions called by this. (so far store the reference point only.)*/
elem.selfSample = pc; /* Reference point for self time counting. */
elem.count = 1; /* Number of this the function is counted. */
elem.selfTime = 0; /* Time spent in the function not including called functions. */
push(callstack, elem);
}
void proflib_func_exit(void *func, void *caller)
{
FunctionTimeInfo *fti;
FunctionTimeInfo *storedStat;
long long pc;
pc = rdtsc();
fti = gettop(callstack);
fti->cumulative = pc - fti->cumulative; /* Finalize the time. */
fti->selfTime += pc - fti->selfSample;
pop(callstack);
{
FunctionTimeInfo *top = gettop(callstack);
top->selfSample = pc; /* Set new self reference for the parent. */
}
storedStat = find(trackingData, func);
if (storedStat)
{
/* Already have an entry. */
storedStat->cumulative += fti->cumulative;
storedStat->selfTime += fti->selfTime;
storedStat->count++;
}
else
{
/* Add it as new entry. */
add(trackingData, fti);
}
}
它产生这样的日志:
Func name Cumulative Self time Count
691C83B9 1138235861408 1138235861408 1137730
00416396 539018507364 539018507364 16657216
0040A0DC 259288775768 199827541522 1914832
0041067D 876519599063 163253984165 92203200
691C9E0E 785372027387 150744125859 190020
004390F9 3608742795672 149177603708 1
0042E6A4 141485929006 116938396343 37753
00428CB8 456357355541 112610168088 193304
0041C2A4 340078363426 84539535634 114437798
691CB980 402228058455 82958191728 29675
00408A0A 79628811602 77769403982 512220
0040D8CD 93610151071 63396331438 87773597
0040D91A 60276409516 60276409516 175547194
00427C36 72489783460 58130405593 1
691C7C3D 56702394950 56702394950 3455819
691C949F 101350487028 47913486509 2977100
691CBBF3 241451044787 45153581905 29771
0043702E 920148247934 41990658926 25612
...
可以从MAP文件中找到函数名称。 DLL中0x691C83B9的函数确实是O(n³)复杂度的次优函数,被称为很多次,我必须重构......我完全忘记了函数甚至存在...... 0x004390F9是WinMain。< / p>