Comments on: Locating Memory Leaks with MallocDebug

By: NinjaArmadillo

NinjaArmadillo — Mon, 24 Mar 2008 16:40:29 +0000

I'm currently trying to use MallocDebug I run it (Debug>Launch using performance tool>MallocDebug), I make sure it's pointing the the right file, Then I click launch.

It hangs for about a minutes then says "Read Data, Unable to read malloc from ..."

I'm using OS X 10.4.11 (Tiger?) Xcode Ver 2.4.1 Component versions Xcode IDE: 762.0 Xcode Core: 762.0 ToolSupport: 764.0

Am I doing something wrong ? Please Help!

By: Emanuele

Emanuele — Thu, 21 Feb 2008 22:15:47 +0000

Yes, the leaks(1) utility is definitely no longer working properly on Leopard. I filed a bug with Apple but I haven't heard anything back about it.

This is another example:

include

static void foo(void) { malloc(256); }

static void leaks(void) { char cmd[64]; sprintf(cmd, "/usr/bin/leaks %u", getpid()); system(cmd); }

int main(void) { atexit(leaks);

foo(); foo(); foo();

return 0; }

By: Simon

Simon — Sun, 10 Feb 2008 21:11:08 +0000

You’re right. The example isn’t working on Leopard anymore. I’ll update it as soon as I found the reason. Thanks!

By: Simon

Simon — Thu, 07 Feb 2008 16:55:58 +0000

Have you tried this in Leopard? I used your example but MallocDebug doesn’t see the leak. Strange…