test/output-commit-fault.c

1/* SPDX-License-Identifier: BSD-3-Clause */

2/* Separate test interposer: product code has no commit-failure switch. */

3#define _GNU_SOURCE

4#include <dlfcn.h>

5#include <stdatomic.h>

6#include <stdio.h>

7#include <stdlib.h>

8#include <wlr/backend.h>

9static _Thread_local unsigned depth;

10static unsigned batches;

11static atomic_int partials;

12int wm_test_partial_commits(void) { return atomic_load(&partials); }

13bool wlr_backend_commit(struct wlr_backend *backend,

14 const struct wlr_backend_output_state *states,size_t count) {

15 typedef bool (*commit_fn)(struct wlr_backend *,const struct wlr_backend_output_state *,size_t);

16 commit_fn commit=(commit_fn)dlsym(RTLD_NEXT,"wlr_backend_commit");

17 if(!commit) abort();

18 if(depth) return commit(backend,states,count);

19 depth++;

20 if(count==2) batches++;

21 bool result;

22 if(count==2 && batches==2) {

23 result=commit(backend,states,1);

24 int width,height;

25 wlr_output_effective_resolution(states[0].output,&width,&height);

26 if(!result || width!=800 || height!=600) abort();

27 atomic_fetch_add(&partials,1);

28 fprintf(stderr,"PARTIAL_COMMIT_INJECTED=1 first=%dx%d\n",width,height);

29 result=false;

30 } else if(count==2 && batches==3 && getenv("SIGIL_WM_TEST_ROLLBACK_FAILURE")) {

31 fprintf(stderr,"ROLLBACK_FAILURE_INJECTED=1\n");

32 result=false;

33 } else result=commit(backend,states,count);

34 depth--;

35 return result;

36}