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avutil/executor: Fix stack overflow due to recursive call

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av_executor_execute run the task directly when thread is disabled.
The task can schedule a new task by call av_executor_execute. This
forms an implicit recursive call. This patch removed the recursive
call.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Zhao Zhili 2024-07-08 20:13:37 +08:00 committed by Paul B Mahol
parent e588ee749f
commit 167125067d
1 changed files with 7 additions and 0 deletions
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7
libavutil/executor.c
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@ -20,6 +20,8 @@
#include "config.h"
#include <stdbool.h>
#include "mem.h"
#include "thread.h"
@ -49,6 +51,7 @@ typedef struct ThreadInfo {
struct AVExecutor {
AVTaskCallbacks cb;
int thread_count;
bool recursive;
ThreadInfo *threads;
uint8_t *local_contexts;
@ -207,8 +210,12 @@ void av_executor_execute(AVExecutor *e, AVTask *t)
}
if (!e->thread_count || !HAVE_THREADS) {
if (e->recursive)
return;
e->recursive = true;
// We are running in a single-threaded environment, so we must handle all tasks ourselves
while (run_one_task(e, e->local_contexts))
/* nothing */;
e->recursive = false;
}
}