[asan] Fix a false positive ODR violation due to LTO ConstantMerge pass [compiler-rt part]
This fixes a false positive ODR violation that is reported by ASan when using LTO. In cases, where two constant globals have the same value, LTO will merge them, which breaks ASan's ODR detection. Differential Revision: https://reviews.llvm.org/D43959 llvm-svn: 327031
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@ -3,15 +3,10 @@
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// REQUIRES: lto
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// RUN: %clangxx_asan -DPART=0 -c %s -o %t-1.o -flto
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// RUN: %clangxx_asan -DPART=1 -c %s -o %t-2.o -flto
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// RUN: %clangxx_asan %t-1.o %t-2.o -o %t -flto
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// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-ODR
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// RUN: %clangxx_asan -DPART=0 -c %s -o %t-1.o -flto -mllvm -asan-use-private-alias
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// RUN: %clangxx_asan -DPART=1 -c %s -o %t-2.o -flto -mllvm -asan-use-private-alias
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// RUN: %clangxx_asan %t-1.o %t-2.o -o %t -flto
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// RUN: %env_asan_opts=use_odr_indicator=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-NO-ODR
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// RUN: %env_asan_opts=use_odr_indicator=1 %run %t 2>&1 | FileCheck %s
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#include <stdio.h>
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#include <stdlib.h>
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@ -40,6 +35,5 @@ void putstest()
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#endif // PART == 1
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// CHECK-ODR: ERROR: AddressSanitizer: odr-violation
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// CHECK-NO-ODR-NOT: ERROR: AddressSanitizer: odr-violation
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// CHECK-NO-ODR: Done.
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// CHECK-NOT: ERROR: AddressSanitizer: odr-violation
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// CHECK: Done.
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@ -0,0 +1,14 @@
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// RUN: %clangxx_asan -O3 -flto %s -o %t
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// RUN: %run %t 2>&1
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// REQUIRES: lto
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int main(int argc, const char * argv[]) {
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struct { long width, height; } a = {16, 16};
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struct { long width, height; } b = {16, 16};
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// Just to make sure 'a' and 'b' don't get optimized out.
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asm volatile ("" : : "r" (&a), "r" (&b) );
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return 0;
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}
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