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To support using Control Flow Guard with mingw-w64, Clang needs to accept `__declspec(guard(nocf))` also for the GNU target. Since mingw has `#define __declspec(a) __attribute__((a))` as built-in, the simplest solution is to accept `__attribute__((guard(nocf)))` to be compatible with MSVC and Clang's msvc target. As a side effect, this also adds `[[clang::guard(nocf)]]` for C++. Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D132302
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
// RUN: %clang_cc1 -triple %ms_abi_triple -fms-extensions -emit-llvm -O2 -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple x86_64-w64-windows-gnu -emit-llvm -O2 -o - %s | FileCheck %s
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// The x86_64-w64-windows-gnu version tests mingw target, which relies on
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// __declspec(...) being defined as __attribute__((...)) by compiler built-in.
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void target_func(void);
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void (*func_ptr)(void) = &target_func;
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// The "guard_nocf" attribute must be added.
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__declspec(guard(nocf)) void nocf0(void) {
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(*func_ptr)();
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}
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// CHECK-LABEL: nocf0
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// CHECK: call{{.*}}[[NOCF:#[0-9]+]]
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// Explicitly test using the GNU-style attribute without relying on the
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// __declspec define for mingw.
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// The "guard_nocf" attribute must be added.
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__attribute__((guard(nocf))) void nocf0_gnu_style(void) {
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(*func_ptr)();
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}
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// CHECK-LABEL: nocf0_gnu_style
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// CHECK: call{{.*}}[[NOCF:#[0-9]+]]
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// The "guard_nocf" attribute must *not* be added.
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void cf0(void) {
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(*func_ptr)();
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}
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// CHECK-LABEL: cf0
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// CHECK: call{{.*}}[[CF:#[0-9]+]]
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// If the modifier is present on either the function declaration or definition,
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// the "guard_nocf" attribute must be added.
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__declspec(guard(nocf)) void nocf1(void);
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void nocf1(void) {
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(*func_ptr)();
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}
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// CHECK-LABEL: nocf1
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// CHECK: call{{.*}}[[NOCF:#[0-9]+]]
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void nocf2(void);
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__declspec(guard(nocf)) void nocf2(void) {
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(*func_ptr)();
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}
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// CHECK-LABEL: nocf2
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// CHECK: call{{.*}}[[NOCF:#[0-9]+]]
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// When inlining a function, the "guard_nocf" attribute on indirect calls must
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// be preserved.
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void nocf3(void) {
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nocf0();
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}
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// CHECK-LABEL: nocf3
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// CHECK: call{{.*}}[[NOCF:#[0-9]+]]
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// When inlining into a function marked as __declspec(guard(nocf)), the
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// "guard_nocf" attribute must *not* be added to the inlined calls.
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__declspec(guard(nocf)) void cf1(void) {
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cf0();
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}
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// CHECK-LABEL: cf1
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// CHECK: call{{.*}}[[CF:#[0-9]+]]
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// CHECK: attributes [[NOCF]] = { {{.*}}"guard_nocf"{{.*}} }
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// CHECK-NOT: attributes [[CF]] = { {{.*}}"guard_nocf"{{.*}} }
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