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Add evil mutex bypass hack in console

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Fixes KartKrew/Kart#795
This commit is contained in:
Eidolon 2024-01-02 13:18:31 -06:00
parent 4a761c2e27
commit e71f6fcc85
3 changed files with 12 additions and 2 deletions
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8
src/console.c
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@ -44,8 +44,12 @@
#ifdef HAVE_THREADS
I_mutex con_mutex;
# define Lock_state() I_lock_mutex(&con_mutex)
# define Unlock_state() I_unlock_mutex(con_mutex)
// g_in_exiting_signal_handler is an evil hack
// to avoid infinite SIGABRT recursion in the signal handler
// due to poisoned locks or mach-o kernel not supporting locks in signals
// or something like that. idk
# define Lock_state() if (!g_in_exiting_signal_handler) { I_lock_mutex(&con_mutex); }
# define Unlock_state() if (!g_in_exiting_signal_handler) { I_unlock_mutex(con_mutex); }
#else/*HAVE_THREADS*/
# define Lock_state()
# define Unlock_state()

3
src/i_system.h
View file

@ -38,6 +38,9 @@ extern UINT8 graphics_started;
*/
extern UINT8 keyboard_started;
/** \brief Set to true when inside a signal handler that will exit the program. */
extern boolean g_in_exiting_signal_handler;
/** \brief The I_GetFreeMem function
\param total total memory in the system

3
src/sdl/i_system.cpp
View file

@ -208,6 +208,7 @@ SDL_bool consolevent = SDL_FALSE;
SDL_bool framebuffer = SDL_FALSE;
UINT8 keyboard_started = false;
boolean g_in_exiting_signal_handler = false;
#ifdef UNIXBACKTRACE
#define STDERR_WRITE(string) if (fd != -1) I_OutputMsg("%s", string)
@ -428,6 +429,8 @@ static void I_ReportSignal(int num, int coredumped)
#ifndef NEWSIGNALHANDLER
FUNCNORETURN static ATTRNORETURN void signal_handler(INT32 num)
{
g_in_exiting_signal_handler = true;
if (g_main_thread_id != std::this_thread::get_id())
{
// Do not attempt any sort of recovery if this signal triggers off the main thread