Re: [ID 20000124.004] "perl in malloc(): warning: recursive call" on

[Ilya Zakharevich <ilya@math.ohio-state.edu>]

On Tue, Jan 25, 2000 at 05:25:40PM -0500, Chuck Robey wrote:
> Do you know for a fact that perl, in the signal handler code, is not
> calling malloc?

$a = 0;		# Prealloc the numeric slot;
$SIG{FOO} = sub { ++$a; return };

will not call malloc()/free()/realloc().  [At least around 5.004].


But this is easy to check.  Before the programs starts to recieve
signals, let it make call some obscure function.  I usually do

  binmode STDERR;

or some such.  Set breakpoint in Perl_pp_binmode.  When hit (this way
all the hard memory-allocation part is already done, so you will not
get false positives), set breakpoints in malloc, free, realloc, and
Perl_sighandler.  Watch your results (continue after each breakpoint).

Ilya

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References to:

Ilya Zakharevich <ilya@math.ohio-state.edu>
Chuck Robey <chuckr@picnic.mat.net>

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