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Add test-case that forces alloc.c functions to fail, and check whether fail handling is robust. This is the test-case for "[libbacktrace] Fix segfault upon allocation failure". Without that patch, this test-case fails like this: ... allocfail.sh: line 71: 26041 Segmentation fault (core dumped) \ ./allocfail $i > /dev/null 2>&1 Unallowed fail found: 13 FAIL allocfail.sh (exit status: 1) ... This is a seperate patch because the test-case is nontrivial. Bootstrapped and reg-tested on x86_64. 2018-12-12 Tom de Vries <tdevries@suse.de> * Makefile.am (TESTS): Add allocfail.sh. (check_PROGRAMS): Add allocfail. * Makefile.in: Regenerate. * instrumented_alloc.c: New file. Redefine malloc and realloc. Include alloc.c. * allocfail.c: New file. * allocfail.sh: New file. From-SVN: r267054
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