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https://github.com/jart/cosmopolitan.git
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eeb20775d2
This will help C++ code that uses exceptions to be tinier. For example, this change shaves away 1000 lines of assembly code from LLVM's libcxx, which is 0.7% of all assembly instructions in the entire library.
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
#ifdef _ASSERT_H
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#undef _ASSERT_H
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#undef assert
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#ifdef _COSMO_SOURCE
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#undef unassert
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#undef npassert
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#ifndef NDEBUG
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#undef __assert_macro
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#endif /* NDEBUG */
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#endif /* _COSMO_SOURCE */
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#endif /* _ASSERT_H */
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#ifndef _ASSERT_H
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#define _ASSERT_H
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COSMOPOLITAN_C_START_
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void __assert_fail(const char *, const char *, int) libcesque;
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void unassert(const char *, const char *, int) libcesque;
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#ifdef NDEBUG
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#define assert(x) ((void)0)
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#else
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#define assert(x) ((void)((x) || (__assert_fail(#x, __FILE__, __LINE__), 0)))
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#endif
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#if __STDC_VERSION__ >= 201112L && !defined(__cplusplus)
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#undef static_assert
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#define static_assert _Static_assert
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#endif
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#ifdef _COSMO_SOURCE
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#ifndef NDEBUG
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#define unassert(x) __assert_macro(x, #x)
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#define npassert(x) __assert_macro(x, #x)
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#define __assert_macro(x, s) \
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({ \
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if (__builtin_expect(!(x), 0)) { \
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(unassert)(s, __FILE__, __LINE__); \
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__asm__("nop"); \
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__builtin_unreachable(); \
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} \
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(void)0; \
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})
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#else
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#define npassert(x) \
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({ \
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if (__builtin_expect(!(x), 0)) { \
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__builtin_trap(); \
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} \
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(void)0; \
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})
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#define unassert(x) \
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({ \
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if (__builtin_expect(!(x), 0)) { \
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__builtin_unreachable(); \
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} \
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(void)0; \
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})
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#endif /* NDEBUG */
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#endif /* _COSMO_SOURCE */
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COSMOPOLITAN_C_END_
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#endif /* _ASSERT_H */
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