From: Simon Marchi <simon.marchi@ericsson.com>
To: Patrick Frants <osscontribute@gmail.com>, <gdb-patches@sourceware.org>
Subject: Re: [PATCH] Fix faulty use of obstack_free() to *shrink* dont_print_statmem_obstack. Instead use obstack_blank_fast() with a "negative" size. A real stack data structured would be appropriate here. Added unit test gdb/testsuite/gdb.cp/printstaticrecursion.exp.
Date: Mon, 23 Oct 2017 17:17:00 -0000 [thread overview]
Message-ID: <0d612f89-a3a9-afea-965b-7c364b660235@ericsson.com> (raw)
In-Reply-To: <a983ffc6-25d8-0553-3e4d-69dc3fec72df@ericsson.com>
On 2017-10-23 12:09 PM, Simon Marchi wrote:
>> diff --git a/gdb/cp-valprint.c b/gdb/cp-valprint.c
>> index fb9bfd9..8f9658d 100644
>> --- a/gdb/cp-valprint.c
>> +++ b/gdb/cp-valprint.c
>> @@ -370,14 +370,9 @@ cp_print_value_fields (struct type *type, struct type *real_type,
>>
>> if (obstack_final_size > statmem_obstack_initial_size)
>> {
>> - /* In effect, a pop of the printed-statics stack. */
>> -
>> - void *free_to_ptr =
>> - (char *) obstack_next_free (&dont_print_statmem_obstack) -
>> - (obstack_final_size - statmem_obstack_initial_size);
>> -
>> - obstack_free (&dont_print_statmem_obstack,
>> - free_to_ptr);
>> + /* In effect, a pop of the printed-statics stack. */
>> + size_t shrink_bytes = statmem_obstack_initial_size - obstack_final_size;
Hmm, size_t is unsigned, maybe it would be better to use ssize_t?
>> + obstack_blank_fast(&dont_print_statmem_obstack, shrink_bytes);
>
> The indentation should be 1 tab + 6 spaces.
>
>> }
>>
>> if (last_set_recurse != recurse)
>
> The code below that (which seems to be handling a similar situation, but for arrays) uses
> obstack_next_free as well. Is there the same problem there?
Never mind about this, I saw your other message after reading this one.
Simon
next prev parent reply other threads:[~2017-10-23 17:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-19 9:31 Patrick Frants
2017-10-19 10:18 ` Patrick Frants
2017-10-23 16:09 ` Simon Marchi
2017-10-23 17:17 ` Simon Marchi [this message]
2017-10-23 19:37 ` Simon Marchi
2017-10-23 19:55 ` osscontribute
2017-10-23 20:07 ` Simon Marchi
2017-10-23 20:04 ` Simon Marchi
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