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run-command: do not pass child process data into callbacks

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The expected way to pass data into the callback is to pass them via
the customizable callback pointer. The error reporting in
default_{start_failure, task_finished} is not user friendly enough, that
we want to encourage using the child data for such purposes.

Furthermore the struct child data is cleaned by the run-command API,
before we access them in the callbacks, leading to use-after-free
situations.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller
2016-02-29 13:57:06 -08:00
committed by Junio C Hamano
parent 62104ba14a
commit 2a73b3dad0
4 changed files with 9 additions and 32 deletions
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7
submodule.c
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@ -705,8 +705,7 @@ static int get_next_submodule(struct child_process *cp,
return 0;
}
static int fetch_start_failure(struct child_process *cp,
struct strbuf *err,
static int fetch_start_failure(struct strbuf *err,
void *cb, void *task_cb)
{
struct submodule_parallel_fetch *spf = cb;
@ -716,8 +715,8 @@ static int fetch_start_failure(struct child_process *cp,
return 0;
}
static int fetch_finish(int retvalue, struct child_process *cp,
struct strbuf *err, void *cb, void *task_cb)
static int fetch_finish(int retvalue, struct strbuf *err,
void *cb, void *task_cb)
{
struct submodule_parallel_fetch *spf = cb;