From: Luis Machado <lgustavo@codesourcery.com>
To: Yao Qi <qiyaoltc@gmail.com>
Cc: <gdb-patches@sourceware.org>
Subject: Re: [PATCH 1/6] New function null_stream
Date: Wed, 18 Jan 2017 14:53:00 -0000 [thread overview]
Message-ID: <79d15965-fd1c-5cff-54f1-d6b7d2e6b884@codesourcery.com> (raw)
In-Reply-To: <20170118144506.GM28060@E107787-LIN>
On 01/18/2017 08:45 AM, Yao Qi wrote:
> On 17-01-17 07:49:07, Luis Machado wrote:
>>>
>>> +struct ui_file *
>>> +null_stream (void)
>>> +{
>>> + static struct ui_file *stream = NULL;
>>> +
>>> + if (stream == NULL)
>>> + {
>>> + stream = ui_file_new ();
>>> + make_final_cleanup (do_ui_file_delete, stream);
>>> + }
>>
>> Since we're explicitly setting stream to NULL, we will always
>> execute the conditional block, so it is not needed. Unless this is
>> supposed to reuse a stream, but in that case the code would be
>> incorrect.
>>
>
> It is a reused null stream. Different parts of gdb can use it. Why
> is it incorrect?
>
We're setting stream to NULL at the top of the function and then
checking if it is NULL (it obviously is) right after that? Am i missing
something?
next prev parent reply other threads:[~2017-01-18 14:53 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-10 12:26 [PATCH 0/8] Handle memory error on disassemble Yao Qi
2017-01-10 12:26 ` [PATCH 4/8] Return -1 on memory error in print_insn_msp430 Yao Qi
2017-01-11 21:54 ` Alan Modra
2017-01-12 9:43 ` Yao Qi
2017-01-10 12:26 ` [PATCH 7/8] Disassembly unit test: memory error Yao Qi
2017-01-10 12:26 ` [PATCH 5/8] Remove magic numbers in m68k-dis.c:print_insn_arg Yao Qi
2017-01-11 22:14 ` Alan Modra
2017-01-13 12:23 ` Yao Qi
2017-01-10 12:26 ` [PATCH 6/8] Return -1 on memory error in print_insn_m68k Yao Qi
2017-01-11 22:15 ` Alan Modra
2017-01-12 11:50 ` Yao Qi
2017-01-12 14:38 ` Alan Modra
2017-01-12 14:52 ` Yao Qi
2017-01-13 1:54 ` Alan Modra
2017-01-13 12:29 ` Yao Qi
2017-01-10 12:26 ` [PATCH 3/8] Disassembly unit test: disassemble one instruction Yao Qi
2017-01-11 21:15 ` Simon Marchi
2017-01-12 13:06 ` Pedro Alves
2017-01-12 17:03 ` Yao Qi
2017-01-12 17:43 ` Pedro Alves
2017-01-12 21:04 ` Yao Qi
2017-01-12 14:35 ` Pedro Alves
2017-01-12 15:15 ` Pedro Alves
2017-01-12 15:35 ` Yao Qi
2017-01-12 15:44 ` Pedro Alves
2017-01-12 16:06 ` Pedro Alves
2017-01-10 12:27 ` [PATCH 2/8] Call print_insn_mep in mep_gdb_print_insn Yao Qi
2017-01-11 20:50 ` Simon Marchi
2017-01-12 12:21 ` Yao Qi
2017-01-10 12:27 ` [PATCH 8/8] Don't throw exception in dis_asm_memory_error Yao Qi
2017-01-12 16:40 ` Pedro Alves
2017-01-12 21:09 ` Yao Qi
2017-01-10 12:27 ` [PATCH 1/8] Refactor disassembly code Yao Qi
2017-01-11 20:43 ` Simon Marchi
2017-01-12 12:19 ` Yao Qi
2017-01-12 12:36 ` Pedro Alves
2017-01-12 15:29 ` Simon Marchi
2017-01-16 10:03 ` [PATCH 0/6 v2] Handle memory error on disassemble Yao Qi
2017-01-16 10:03 ` [PATCH 3/6] Call print_insn_mep in mep_gdb_print_insn Yao Qi
2017-01-17 14:19 ` Luis Machado
2017-01-24 10:08 ` Yao Qi
2017-01-24 13:41 ` Luis Machado
2017-01-16 10:03 ` [PATCH 6/6] Don't throw exception in dis_asm_memory_error Yao Qi
2017-01-17 14:42 ` Luis Machado
2017-01-18 14:54 ` Yao Qi
2017-01-18 14:58 ` Luis Machado
2017-01-16 10:03 ` [PATCH 2/6] Refactor disassembly code Yao Qi
2017-01-17 14:14 ` Luis Machado
2017-01-18 16:34 ` Yao Qi
2017-01-18 16:53 ` Luis Machado
2017-01-16 10:03 ` [PATCH 1/6] New function null_stream Yao Qi
2017-01-17 13:49 ` Luis Machado
2017-01-18 14:45 ` Yao Qi
2017-01-18 14:53 ` Luis Machado [this message]
2017-01-18 14:57 ` Simon Marchi
2017-01-18 15:02 ` Luis Machado
2017-01-18 15:18 ` Simon Marchi
2017-01-18 15:29 ` Luis Machado
2017-01-18 15:54 ` Simon Marchi
2017-01-18 16:36 ` Luis Machado
2017-01-16 10:03 ` [PATCH 5/6] Disassembly unit test: memory error Yao Qi
2017-01-17 14:38 ` Luis Machado
2017-01-24 15:33 ` Yao Qi
2017-01-20 0:08 ` Pedro Alves
2017-01-16 10:03 ` [PATCH 4/6] Disassembly unit test: disassemble one instruction Yao Qi
2017-01-20 0:04 ` Pedro Alves
2017-01-24 15:23 ` Yao Qi
2017-02-02 16:46 ` Pedro Alves
2017-02-02 22:12 ` Yao Qi
2017-02-02 23:39 ` [pushed] Fix "maintenance selftest" printing stray instructions (Re: [PATCH 4/6] Disassembly unit test: disassemble one instruction) Pedro Alves
2017-01-25 8:38 ` [PATCH 0/6 v3] Handle memory error on disassembly Yao Qi
2017-01-25 8:38 ` [PATCH 2/6] Refactor disassembly code Yao Qi
2017-01-25 8:38 ` [PATCH 5/6] Disassembly unit test: memory error Yao Qi
2017-01-25 8:38 ` [PATCH 1/6] New function null_stream Yao Qi
2017-01-25 8:38 ` [PATCH 4/6] Disassembly unit test: disassemble one instruction Yao Qi
2017-01-25 8:38 ` [PATCH 6/6] Don't throw exception in dis_asm_memory_error Yao Qi
2017-01-25 8:38 ` [PATCH 3/6] Call print_insn_mep in mep_gdb_print_insn Yao Qi
2017-01-26 11:34 ` [PATCH 0/6 v3] Handle memory error on disassembly Pedro Alves
2017-01-26 15:00 ` Yao Qi
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