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acf9aa3c22
Unlike ELF targets, MachO does not support the same kind of dynamic symbol resolution at load time. Instead, the corresponding MachO feature resolves symbols lazily on first call. Reviewers: JDevlieghere, dmpolukhin, ahmedbougacha, tahonermann, echristo, MaskRay, erichkeane Reviewed By: MaskRay, echristo, ahmedbougacha Pull Request: https://github.com/llvm/llvm-project/pull/73687
73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
// RUN: %clang_cc1 -triple x86_64-windows -fsyntax-only -verify %s
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// RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only -DCHECK_ALIASES %s
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// RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only %s
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// RUN: %clang_cc1 -triple x86_64-apple-macosx -fsyntax-only -verify -emit-llvm-only %s
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#if defined(_WIN32)
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void foo(void) {}
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void bar(void) __attribute__((ifunc("foo")));
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// expected-warning@-1 {{unknown attribute 'ifunc' ignored}}
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#else
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#if defined(CHECK_ALIASES)
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void *f1_ifunc(void);
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void f1(void) __attribute__((ifunc("f1_ifunc")));
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// expected-error@-1 {{ifunc must point to a defined function}}
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// expected-note@-2 {{must refer to its mangled name}}
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void *f2_a(void) __attribute__((alias("f2_b")));
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void *f2_b(void) __attribute__((ifunc("f2_a")));
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// expected-error@-1 {{ifunc definition is part of a cycle}}
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void *f3_a(void) __attribute__((ifunc("f3_b")));
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// expected-warning@-1 {{ifunc will always resolve to f3_c even if weak definition of f3_b is overridden}}
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void *f3_b(void) __attribute__((weak, alias("f3_c")));
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void *f3_c(void) { return 0; }
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void f4_ifunc(void) {}
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void f4(void) __attribute__((ifunc("f4_ifunc")));
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// expected-error@-1 {{ifunc resolver function must return a pointer}}
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int f5_resolver_gvar;
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void f5(void) __attribute__((ifunc("f5_resolver_gvar")));
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// expected-error@-1 {{ifunc must point to a defined function}}
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void *f6_resolver_resolver(void) { return 0; }
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void *f6_resolver(void) __attribute__((ifunc("f6_resolver_resolver")));
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void f6(void) __attribute__((ifunc("f6_resolver")));
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// expected-error@-1 {{ifunc must point to a defined function}}
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#elif defined(__APPLE__)
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// NOTE: aliases are not supported on Darwin, so the above tests are not relevant.
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#define STR2(X) #X
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#define STR(X) STR2(X)
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#define PREFIX STR(__USER_LABEL_PREFIX__)
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void f1a(void) __asm("f1");
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void f1a(void) {}
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// expected-note@-1 {{previous definition is here}}
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void f1(void) __attribute__((ifunc(PREFIX "f1_ifunc"))) __asm("f1");
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// expected-error@-1 {{definition with same mangled name '<U+0001>f1' as another definition}}
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void *f1_ifunc(void) { return 0; }
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void *f6_ifunc(int i);
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void __attribute__((ifunc(PREFIX "f6_ifunc"))) f6(void) {}
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// expected-error@-1 {{definition 'f6' cannot also be an ifunc}}
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#else
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void f1a(void) __asm("f1");
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void f1a(void) {}
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// expected-note@-1 {{previous definition is here}}
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void f1(void) __attribute__((ifunc("f1_ifunc")));
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// expected-error@-1 {{definition with same mangled name 'f1' as another definition}}
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void *f1_ifunc(void) { return 0; }
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void *f6_ifunc(int i);
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void __attribute__((ifunc("f6_ifunc"))) f6(void) {}
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// expected-error@-1 {{definition 'f6' cannot also be an ifunc}}
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#endif
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#endif
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