Monorepo for Aesthetic.Computer
aesthetic.computer
fix: crash-safe SDL3 init — probe in child process to catch segfaults
SDL3 KMSDRM init can segfault on bare metal if Mesa/EGL libs are
missing or misconfigured. Now probes in a forked child process first;
if the child crashes, SDL3 is skipped and DRM dumb buffers are used.
Also checks dlopen("libSDL3.so.0") before attempting init.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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fedac/native/Makefile
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fedac/native/Makefile
···
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QUIRCDIR := lib/quirc/lib
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QRGENDIR := lib/qrcodegen
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CFLAGS := -O2 -Wall -Wextra -std=gnu11 -I$(QJSDIR) -I$(QUIRCDIR) -I$(QRGENDIR) -DAC_GIT_HASH=\"$(GIT_HASH)\" -DAC_BUILD_TS=\"$(BUILD_TS)\" -DAC_BUILD_NAME=\"$(BUILD_NAME)\"
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-
LDFLAGS := -Wl,--as-needed -lm -lpthread -lasound -lutil
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LDFLAGS := -Wl,--as-needed -lm -lpthread -lasound -lutil -ldl
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# Static build: only when musl-gcc is available (musl has bundled static libc)
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# On Fedora/standard gcc, dynamic linking is used and .so files are bundled in initramfs
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fedac/native/src/drm-display.c
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fedac/native/src/drm-display.c
···
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// SDL3 GPU-accelerated display (uses KMSDRM backend on bare metal)
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// ============================================================
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#include <dlfcn.h>
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#include <signal.h>
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#include <sys/wait.h>
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// Probe whether SDL3 can init without crashing (runs in a child process)
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static int sdl_probe_safe(void) {
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pid_t pid = fork();
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if (pid < 0) return 0; // fork failed, skip SDL
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if (pid == 0) {
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// Child: try SDL_Init, exit 0 on success, 1 on failure, crash = signal
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if (getpid() != 1) // never true in child, but set env anyway
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setenv("SDL_VIDEO_DRIVER", "kmsdrm", 0);
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int ok = SDL_Init(SDL_INIT_VIDEO) ? 0 : 1;
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if (!ok) SDL_Quit();
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_exit(ok);
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}
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// Parent: wait for child
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int status = 0;
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waitpid(pid, &status, 0);
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if (WIFSIGNALED(status)) {
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fprintf(stderr, "[sdl3] Probe crashed (signal %d) — skipping SDL3\n",
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WTERMSIG(status));
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return 0;
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}
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if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
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return 1;
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}
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fprintf(stderr, "[sdl3] Probe failed (exit %d) — skipping SDL3\n",
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WIFEXITED(status) ? WEXITSTATUS(status) : -1);
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return 0;
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}
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static ACDisplay *sdl_init(void) {
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// Check if libSDL3 is even loadable
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void *sdl_lib = dlopen("libSDL3.so.0", RTLD_LAZY | RTLD_NOLOAD);
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if (!sdl_lib) {
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sdl_lib = dlopen("libSDL3.so.0", RTLD_LAZY);
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if (!sdl_lib) {
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fprintf(stderr, "[sdl3] libSDL3.so.0 not found — skipping\n");
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return NULL;
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}
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}
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dlclose(sdl_lib);
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// Probe in a child process to catch segfaults
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if (!sdl_probe_safe()) return NULL;
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// Set KMSDRM hints for bare metal (no X11/Wayland)
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if (getpid() == 1) {
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setenv("SDL_VIDEO_DRIVER", "kmsdrm", 0);