<optional>: Add Address Sanitizer annotations
#6010
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| Original file line number | Diff line number | Diff line change |
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| # Copyright (c) Microsoft Corporation. | ||
| # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
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| RUNALL_INCLUDE ..\usual_17_matrix.lst |
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| Original file line number | Diff line number | Diff line change |
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| // Copyright (c) Microsoft Corporation. | ||
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
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| #include <cassert> | ||
| #include <optional> | ||
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| #ifdef __SANITIZE_ADDRESS__ | ||
| extern "C" int __cdecl __asan_address_is_poisoned(void const volatile* addr); | ||
| #define ASAN_VERIFY_POISONED(addr) assert(__asan_address_is_poisoned((addr)) != 0) | ||
| #define ASAN_VERIFY_UNPOISONED(addr) assert(__asan_address_is_poisoned((addr)) == 0) | ||
| #else | ||
| #define ASAN_VERIFY_POISONED(addr) ((void) (addr)) | ||
| #define ASAN_VERIFY_UNPOISONED(addr) ((void) (addr)) | ||
| #endif | ||
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| struct Payload { | ||
| long long x; | ||
| long long y; | ||
| long long z; | ||
| long long w; | ||
| }; | ||
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| void test_poison_on_empty_access() { | ||
| [[maybe_unused]] std::optional<Payload> opt; | ||
| ASAN_VERIFY_POISONED(reinterpret_cast<Payload*>(&opt)); | ||
| } | ||
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| void test_emplace_unpoisoning() { | ||
| std::optional<Payload> opt; | ||
| opt.emplace(); | ||
| ASAN_VERIFY_UNPOISONED(reinterpret_cast<Payload*>(&opt)); | ||
| } | ||
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| void test_assignment_unpoisoning() { | ||
| std::optional<Payload> opt = std::nullopt; | ||
| opt = Payload{}; | ||
| ASAN_VERIFY_UNPOISONED(reinterpret_cast<Payload*>(&opt)); | ||
| } | ||
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| void test_repoison_after_reset() { | ||
| std::optional<Payload> opt = Payload{}; | ||
| ASAN_VERIFY_UNPOISONED(reinterpret_cast<Payload*>(&opt)); | ||
| opt.reset(); | ||
| ASAN_VERIFY_POISONED(reinterpret_cast<Payload*>(&opt)); | ||
| } | ||
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| constexpr bool test_constexpr() { | ||
| #if _HAS_CXX20 | ||
| bool res = true; | ||
| std::optional<Payload> opt = std::nullopt; | ||
| opt = Payload{}; | ||
| opt.reset(); | ||
| opt = Payload{86, 0, 0, 0}; | ||
| res = opt->x == 86; | ||
| opt.emplace(42, 0, 0, 0); | ||
| res = res && (opt->x == 42); | ||
| return res; | ||
| #else | ||
| std::optional<Payload> opt{Payload{86, 0, 0, 0}}; | ||
| return opt->x == 86; | ||
| #endif | ||
| } | ||
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| int main() { | ||
| test_poison_on_empty_access(); | ||
| test_emplace_unpoisoning(); | ||
| test_assignment_unpoisoning(); | ||
| test_repoison_after_reset(); | ||
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Comment on lines
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Contributor
There was a problem hiding this comment. I think we can make these cases constexpr-friendly and test them in
Author
There was a problem hiding this comment. Added a separate function to test constexpr functionality in |
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| static_assert(test_constexpr(), "constexpr test failed"); | ||
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| return 0; | ||
| } | ||
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This variable isn't used. Is it really necessary?
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Added a check for this variable inside the
if(!_STD _Is_constant_evaluated())block.