Bug #10008 ยป 0001-proof-of-concept-for-bug-10008.patch
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fi])
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AC_CHECK_FUNCS(backtrace)
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if test "x$ac_cv_func_backtrace" = xyes; then
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AC_CACHE_CHECK(for broken backtrace, rb_cv_broken_backtrace,
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[AC_TRY_RUN([
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <signal.h>
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#include <execinfo.h>
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#define TRACE_SIZE 256
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void sigsegv(int signum, siginfo_t *info, void *ctx){
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void *trace[TRACE_SIZE];
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int n = backtrace(trace, TRACE_SIZE);
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if (n > 0) {
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/*fprintf(stdout, "backtrace:%d\n",n);*/
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} else {
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abort();
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}
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_exit(0);
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}
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int
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main()
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{
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stack_t ss;
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ss.ss_sp = malloc(SIGSTKSZ);
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if (ss.ss_sp == NULL) {
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fprintf(stderr, "cannot allocate memory for sigaltstack\n");
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abort();
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}
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ss.ss_size = SIGSTKSZ;
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ss.ss_flags = 0;
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if (sigaltstack(&ss, NULL) == -1) {
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fprintf(stderr, "sigaltstack failed\n");
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abort();
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}
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struct sigaction sa;
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memset(&sa, 0, sizeof(struct sigaction));
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sigemptyset(&sa.sa_mask);
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sa.sa_sigaction = sigsegv;
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sa.sa_flags |= SA_SIGINFO;
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sa.sa_flags |= SA_ONSTACK;
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sigaction(SIGSEGV, &sa, NULL);
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int *a = NULL;
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a[0] = 1;
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return 0;
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}
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],
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rb_cv_broken_backtrace=no,
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rb_cv_broken_backtrace=yes,
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rb_cv_broken_backtrace=no)])
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if test "$rb_cv_broken_backtrace" = yes; then
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AC_DEFINE(BROKEN_BACKTRACE, 1)
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fi
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fi
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AC_DEFINE(BROKEN_BACKTRACE, 1)
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AC_ARG_WITH(valgrind,
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AS_HELP_STRING([--without-valgrind],[disable valgrind memcheck support]),
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