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SCP: Fix potential multi threaded simulator activities when flushing log data

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Avoid the potential by properly leveraging the range that the
recursive mutex which already properly serializes separate activities
to the debug log file.
This commit is contained in:
Mark Pizzolato 2025-03-21 09:36:36 -10:00
parent fed5342f44
commit 33166dfcdf
1 changed files with 4 additions and 1 deletions
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5
scp.c
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@ -14536,12 +14536,13 @@ static void _sim_debug_write_flush (const char *buf, size_t len, t_bool flush)
{
char *eol;
AIO_LOCK;
if (sim_deb_switches & SWMASK ('F')) { /* filtering disabled? */
if (len > 0)
_debug_fwrite (buf, len); /* output now. */
AIO_UNLOCK;
return; /* done */
}
AIO_LOCK;
if (debug_line_offset + len + 1 > debug_line_bufsize) {
debug_line_bufsize += MAX(1024, debug_line_offset + len + 1);
debug_line_buf = (char *)realloc (debug_line_buf, debug_line_bufsize);
@ -14627,6 +14628,7 @@ struct timespec saved_deb_basetime;
if (sim_deb == NULL) /* no debug? */
return SCPE_OK;
AIO_LOCK;
saved_deb_basetime = *sim_rtcn_get_debug_basetime ();
_sim_debug_write_flush ("", 0, TRUE);
@ -14649,6 +14651,7 @@ if ((saved_deb_switches & SWMASK ('B')) != 0) {
sim_switches = saved_sim_switches;
sim_quiet = saved_quiet;
}
AIO_UNLOCK;
return SCPE_OK;
}