| 1 | //===-- FPExceptMatchers.cpp ----------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "FPExceptMatcher.h" |
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| 10 | |
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| 11 | #include "src/__support/macros/config.h" |
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| 12 | #include "test/UnitTest/ExecuteFunction.h" // FunctionCaller |
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| 13 | #include "test/UnitTest/Test.h" |
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| 14 | |
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| 15 | #include "hdr/types/fenv_t.h" |
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| 16 | #include "src/__support/FPUtil/FEnvImpl.h" |
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| 17 | #include <setjmp.h> |
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| 18 | #include <signal.h> |
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| 19 | |
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| 20 | #if LIBC_TEST_HAS_MATCHERS() |
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| 21 | |
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| 22 | namespace LIBC_NAMESPACE_DECL { |
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| 23 | namespace testing { |
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| 24 | |
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| 25 | #if defined(_WIN32) |
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| 26 | #define sigjmp_buf jmp_buf |
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| 27 | #define sigsetjmp(buf, save) setjmp(buf) |
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| 28 | #define siglongjmp(buf, val) longjmp(buf, val) |
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| 29 | #endif |
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| 30 | |
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| 31 | static thread_local sigjmp_buf jumpBuffer; |
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| 32 | static thread_local bool caughtExcept; |
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| 33 | |
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| 34 | static void sigfpeHandler(int sig) { |
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| 35 | caughtExcept = true; |
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| 36 | siglongjmp(jumpBuffer, -1); |
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| 37 | } |
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| 38 | |
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| 39 | FPExceptMatcher::FPExceptMatcher(FunctionCaller *func) { |
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| 40 | auto *oldSIGFPEHandler = signal(SIGFPE, &sigfpeHandler); |
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| 41 | |
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| 42 | caughtExcept = false; |
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| 43 | fenv_t oldEnv; |
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| 44 | fputil::get_env(&oldEnv); |
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| 45 | if (sigsetjmp(jumpBuffer, 1) == 0) |
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| 46 | func->call(); |
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| 47 | delete func; |
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| 48 | // We restore the previous floating point environment after |
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| 49 | // the call to the function which can potentially raise SIGFPE. |
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| 50 | fputil::set_env(&oldEnv); |
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| 51 | signal(SIGFPE, oldSIGFPEHandler); |
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| 52 | exceptionRaised = caughtExcept; |
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| 53 | } |
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| 54 | |
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| 55 | } // namespace testing |
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| 56 | } // namespace LIBC_NAMESPACE_DECL |
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| 57 | |
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| 58 | #endif // LIBC_TEST_HAS_MATCHERS() |
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| 59 | |
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