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common/assert: Use noinline lambda instead of a wrapper template

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MSVC now supports specifying __declspec on lambda functions
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Morph 2022-06-14 07:21:34 -04:00
parent 49c0ed297f
commit edbe7600f5
1 changed files with 23 additions and 21 deletions
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44
src/common/assert.h
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@ -10,41 +10,43 @@
// For asserts we'd like to keep all the junk executed when an assert happens away from the
// important code in the function. One way of doing this is to put all the relevant code inside a
// lambda and force the compiler to not inline it. Unfortunately, MSVC seems to have no syntax to
// specify __declspec on lambda functions, so what we do instead is define a noinline wrapper
// template that calls the lambda. This seems to generate an extra instruction at the call-site
// compared to the ideal implementation (which wouldn't support ASSERT_MSG parameters), but is good
// enough for our purposes.
template <typename Fn>
#if defined(_MSC_VER)
[[msvc::noinline, noreturn]]
#elif defined(__GNUC__)
[[gnu::cold, gnu::noinline, noreturn]]
#endif
static void
assert_noinline_call(const Fn& fn) {
fn();
Crash();
exit(1); // Keeps GCC's mouth shut about this actually returning
}
// lambda and force the compiler to not inline it.
#define ASSERT(_a_) \
do \
if (!(_a_)) { \
assert_noinline_call([] { LOG_CRITICAL(Debug, "Assertion Failed!"); }); \
[]() CITRA_NO_INLINE { \
LOG_CRITICAL(Debug, "Assertion Failed!"); \
Crash(); \
exit(1); \
}(); \
} \
while (0)
#define ASSERT_MSG(_a_, ...) \
do \
if (!(_a_)) { \
assert_noinline_call([&] { LOG_CRITICAL(Debug, "Assertion Failed!\n" __VA_ARGS__); }); \
[&]() CITRA_NO_INLINE { \
LOG_CRITICAL(Debug, "Assertion Failed!\n" __VA_ARGS__); \
Crash(); \
exit(1); \
}(); \
} \
while (0)
#define UNREACHABLE() assert_noinline_call([] { LOG_CRITICAL(Debug, "Unreachable code!"); })
#define UNREACHABLE() \
([]() CITRA_NO_INLINE { \
LOG_CRITICAL(Debug, "Unreachable code!"); \
Crash(); \
exit(1); \
}())
#define UNREACHABLE_MSG(...) \
assert_noinline_call([&] { LOG_CRITICAL(Debug, "Unreachable code!\n" __VA_ARGS__); })
([&]() CITRA_NO_INLINE { \
LOG_CRITICAL(Debug, "Unreachable code!\n" __VA_ARGS__); \
Crash(); \
exit(1); \
}())
#ifdef _DEBUG
#define DEBUG_ASSERT(_a_) ASSERT(_a_)