How use Instruments and display the console in Command Lines applications [duplicate]
I'm using Xcode on OSX to develop command line C applications. I would also like to use Instruments to profile and find memory leaks.
However, I couldn't find a way to display the console when launching the application from within Instruments. I'm also unable to attach to a running command line process (it exits with an error):
Here's an example code:
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <setjmp.h>
static sigjmp_buf jmpbuf;
void handler(int sig) {
char c[BUFSIZ];
printf ("Got signal %d\n", sig);
printf ("Deseja sair? (s/n) ");
fgets(c, sizeof(c), stdin);
if(c[0] == 's') {
exit(0);
} else {
siglongjmp(jmpbuf, 1);
}
}
int main(void) {
char buf[BUFSIZ];
signal(SIGINT, handler);
sigsetjmp(jmpbuf, 1);
while(1) {
printf(">>>");
fgets(buf, sizeof(buf), stdin);
printf ("Introduziu: %s\n", buf);
}
return(0);
}
Here's the error I got after launching Instruments, and trying to attach to the running process in xcode:
[Switching to process 1475]
[Switching to process 1475]
Error while running hook_stop:
sharedlibrary apply-load-rules all
Error while runn开发者_运维技巧ing hook_stop:
Invalid type combination in ordering comparison.
Error while running hook_stop:
Invalid type combination in ordering comparison.
Error while running hook_stop:
Error while running hook_stop:
Error while running hook_stop:
Error while running hook_stop:
Error while running hook_stop:
Error while running hook_stop:
Error while running hook_stop:
Unable to disassemble __CFInitialize.
Any thoughts?
It's easy. See the screenshot.
It's a little late to contribute to this old thread, however I have found the best way of profiling a command line utility is to use iprofiler
(manpage). This allows data to be collected from the command line simply by adding this to the start of the command line:
iprofiler -leaks -d $HOME/tmp
(I have a private temporary directory at $HOME/tmp
, so you might need to use /tmp
or leave the -d
command line option off altogether).
My test scripts automatically add that to the command line if $FINDLEAKS
is defined (and will prepend valgrind
if running under Linux).
This then generates a .dtps
file (actually a directory) which can be loaded and anaylysed using Instruments.
If you are compiling using clang
then simply add both -O3
and -g
(clang doesn't support the -pg
command line option).
You can change the output in the Options dropdown when choosing your target. The output will appear in the system Console (Applications/Utilities/Console).
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