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| // RUN: %clang_dfsan -DLIB -c %s -o %t.lib.o && \
// RUN: %clang_dfsan -c %s -o %t.o && \
// RUN: %clang_dfsan %t.lib.o %t.o -o %t.bin && \
// RUN: %run %t.bin
// RUN: %clang_dfsan -mllvm -dfsan-args-abi -DLIB -c %s -o %t.lib.o && \
// RUN: %clang_dfsan -mllvm -dfsan-args-abi -c %s -o %t.o && \
// RUN: %clang_dfsan -mllvm -dfsan-args-abi %t.o %t.lib.o -o %t.bin && \
// RUN: %run %t.bin
#include <sanitizer/dfsan_interface.h>
#include <assert.h>
#ifdef LIB
// Compiling this file with and without LIB defined allows this file to be
// built as two separate translation units. This ensures that the code
// can not be optimized in a way that removes behavior we wish to test. For
// example, computing a value should cause labels to be allocated only if
// the computation is actually done. Putting the computation here prevents
// the compiler from optimizing away the computation (and labeling) that
// tests wish to verify.
int add_in_separate_translation_unit(int a, int b) {
return a + b;
}
int multiply_in_separate_translation_unit(int a, int b) {
return a * b;
}
#else
int add_in_separate_translation_unit(int i, int j);
int multiply_in_separate_translation_unit(int i, int j);
int main(void) {
size_t label_count;
// No labels allocated yet.
label_count = dfsan_get_label_count();
assert(0 == label_count);
int i = 1;
dfsan_label i_label = dfsan_create_label("i", 0);
dfsan_set_label(i_label, &i, sizeof(i));
// One label allocated for i.
label_count = dfsan_get_label_count();
assert(1u == label_count);
int j = 2;
dfsan_label j_label = dfsan_create_label("j", 0);
dfsan_set_label(j_label, &j, sizeof(j));
// Check that a new label was allocated for j.
label_count = dfsan_get_label_count();
assert(2u == label_count);
// Create a value that combines i and j.
int i_plus_j = add_in_separate_translation_unit(i, j);
// Check that a label was created for the union of i and j.
label_count = dfsan_get_label_count();
assert(3u == label_count);
// Combine i and j in a different way. Check that the existing label is
// reused, and a new label is not created.
int j_times_i = multiply_in_separate_translation_unit(j, i);
label_count = dfsan_get_label_count();
assert(3u == label_count);
assert(dfsan_get_label(i_plus_j) == dfsan_get_label(j_times_i));
return 0;
}
#endif // #ifdef LIB
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