c35d402aeb
printf is an inline function in VS 2015, giving these tests an unexpected extra point of coverage. This change works around that by avoiding printf. llvm-svn: 264010
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
// Test __sanitizer_reset_coverage().
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// RUN: %clangxx_asan -fsanitize-coverage=func %s -o %t
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// RUN: %env_asan_opts=coverage=1 %run %t
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// https://github.com/google/sanitizers/issues/618
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// UNSUPPORTED: android
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#include <sanitizer/coverage_interface.h>
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#include <stdio.h>
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#include <assert.h>
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static volatile int sink;
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__attribute__((noinline)) void bar() { sink = 2; }
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__attribute__((noinline)) void foo() { sink = 1; }
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// In MSVC 2015, printf is an inline function, which causes this test to fail as
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// it introduces an extra coverage point. Define away printf on that platform to
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// avoid the issue.
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#if _MSC_VER >= 1900
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# define printf(arg, ...)
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#endif
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#define GET_AND_PRINT_COVERAGE() \
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bitset = 0; \
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for (size_t i = 0; i < n_guards; i++) \
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if (guards[i]) bitset |= 1U << i; \
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printf("line %d: bitset %zd total: %zd\n", __LINE__, bitset, \
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__sanitizer_get_total_unique_coverage());
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#define IS_POWER_OF_TWO(a) ((a & ((a) - 1)) == 0)
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int main() {
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size_t *guards = 0;
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size_t bitset;
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size_t n_guards = __sanitizer_get_coverage_guards(&guards);
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GET_AND_PRINT_COVERAGE();
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size_t main_bit = bitset;
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assert(IS_POWER_OF_TWO(main_bit));
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foo();
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GET_AND_PRINT_COVERAGE();
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size_t foo_bit = bitset & ~main_bit;
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assert(IS_POWER_OF_TWO(foo_bit));
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bar();
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GET_AND_PRINT_COVERAGE();
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size_t bar_bit = bitset & ~(main_bit | foo_bit);
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assert(IS_POWER_OF_TWO(bar_bit));
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__sanitizer_reset_coverage();
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assert(__sanitizer_get_total_unique_coverage() == 0);
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GET_AND_PRINT_COVERAGE();
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assert(bitset == 0);
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foo();
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GET_AND_PRINT_COVERAGE();
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assert(bitset == foo_bit);
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bar();
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GET_AND_PRINT_COVERAGE();
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assert(bitset == (foo_bit | bar_bit));
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}
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