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1// RUN: %clang_dfsan %s -o %t && %run %t2 3// Tests that labels are propagated through computation and that union labels4// are properly created.5 6#include <sanitizer/dfsan_interface.h>7#include <assert.h>8 9int main(void) {10 assert(dfsan_union(0, 0) == 0);11 12 int i = 1;13 dfsan_label i_label = 1;14 dfsan_set_label(i_label, &i, sizeof(i));15 16 int j = 2;17 dfsan_label j_label = 2;18 dfsan_set_label(j_label, &j, sizeof(j));19 20 int k = 3;21 dfsan_label k_label = 4;22 dfsan_set_label(k_label, &k, sizeof(k));23 24 int k2 = 4;25 dfsan_set_label(k_label, &k2, sizeof(k2));26 27 dfsan_label ij_label = dfsan_get_label(i + j);28 assert(dfsan_has_label(ij_label, i_label));29 assert(dfsan_has_label(ij_label, j_label));30 assert(!dfsan_has_label(ij_label, k_label));31 // Test uniquing.32 assert(dfsan_union(i_label, j_label) == ij_label);33 assert(dfsan_union(j_label, i_label) == ij_label);34 35 dfsan_label ijk_label = dfsan_get_label(i + j + k);36 assert(dfsan_has_label(ijk_label, i_label));37 assert(dfsan_has_label(ijk_label, j_label));38 assert(dfsan_has_label(ijk_label, k_label));39 40 assert(dfsan_get_label(k + k2) == k_label);41 42 struct { int i, j; } s = { i, j };43 assert(dfsan_read_label(&s, sizeof(s)) == ij_label);44 45 return 0;46}47