(no subject)
(no subject)
- Subject: (no subject)
- From: Paul Fox <email@hidden>
- Date: Thu, 11 Jul 2002 13:53:37 +0100
To: email@hidden
Subject: Re: VERY BAD: Memory leak in printf?
X-Mailer: Created by CRiSP-Mail v6.3 (CRiSP v8.0.6b)
Date: Thu, 11 Jul 2002 13:20:25 +0000
>
If I run 'leaks' on my running app, I appear to get memory
>
leaks from inside printf:
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abridged stack trace:
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>
-[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] | -[NSView _drawRect:clip:] | -[CrispVi
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ew drawRect:] | printf | vfprintf | cvt | __dtoa | malloc | malloc_zone_malloc
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>
Is this a false report? Known bug in printf? Nothing to worry about?
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>
thanx
Oh dear. This is a _very_bad_ memory leak in printf.
I tried some simple code, such as:
printf("%d\n", i);
in a loop. No bug.
I tried:
printf("%g\n", f);
in a loop. No bug.
The bug appears to be if more than one float spec is used. The following
chews memory like there is no tomorrow. I'll see if I can raise a bug
on it if I can find the page:
int main(int argc, char **argv)
{ int i = 0, j;
float f = 0;
while (1) {
for(j = 0; j < 1000; j++, i++, f++)
printf("%d %u %x %g,%g,%g,%g\n",
i, i, i, f, f, f, f);
sleep(1);
}
}
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