5b4dda550e
Complete support for fast8: - amend shadow size and mapping in runtime - remove fast16 mode and -dfsan-fast-16-labels flag - remove legacy mode and make fast8 mode the default - remove dfsan-fast-8-labels flag - remove functions in dfsan interface only applicable to legacy - remove legacy-related instrumentation code and tests - update documentation. Reviewed By: stephan.yichao.zhao, browneee Differential Revision: https://reviews.llvm.org/D103745
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
// RUN: %clang_dfsan -DUSE_SIGNAL_ACTION %s -o %t && %run %t
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// RUN: %clang_dfsan %s -o %t && %run %t
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//
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// REQUIRES: x86_64-target-arch
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#include <sanitizer/dfsan_interface.h>
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#include <assert.h>
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#include <signal.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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volatile int x;
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volatile int z = 1;
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void SignalHandler(int signo) {
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assert(dfsan_get_label(signo) == 0);
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x = z;
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}
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void SignalAction(int signo, siginfo_t *si, void *uc) {
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assert(dfsan_get_label(signo) == 0);
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assert(dfsan_get_label(si) == 0);
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assert(dfsan_get_label(uc) == 0);
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assert(0 == dfsan_read_label(si, sizeof(*si)));
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assert(0 == dfsan_read_label(uc, sizeof(ucontext_t)));
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x = z;
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}
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int main(int argc, char *argv[]) {
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dfsan_set_label(8, (void *)&z, sizeof(z));
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struct sigaction sa = {};
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#ifdef USE_SIGNAL_ACTION
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sa.sa_flags = SA_SIGINFO;
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sa.sa_sigaction = SignalAction;
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#else
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sa.sa_handler = SignalHandler;
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#endif
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int r = sigaction(SIGHUP, &sa, NULL);
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assert(dfsan_get_label(r) == 0);
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kill(getpid(), SIGHUP);
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signal(SIGHUP, SIG_DFL);
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assert(x == 1);
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return 0;
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}
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