forked from OSchip/llvm-project
33 lines
815 B
C++
33 lines
815 B
C++
// RUN: %clangxx_msan -O0 %s -o %t && %run %t
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// Check that strlen() and similar intercepted functions can be called on shadow
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// memory.
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#include <assert.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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const char *mem_to_shadow(const char *p) {
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#if defined(__x86_64__)
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return (char *)((uintptr_t)p & ~0x400000000000ULL);
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#elif defined (__mips64)
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return (char *)((uintptr_t)p & ~0x4000000000ULL);
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#elif defined(__powerpc64__)
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#define LINEARIZE_MEM(mem) \
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(((uintptr_t)(mem) & ~0x200000000000ULL) ^ 0x100000000000ULL)
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return (char *)(LINEARIZE_MEM(p) + 0x080000000000ULL);
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#endif
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}
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int main(void) {
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const char *s = "abcdef";
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assert(strlen(s) == 6);
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assert(strlen(mem_to_shadow(s)) == 0);
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char *t = new char[42];
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t[41] = 0;
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assert(strlen(mem_to_shadow(t)) == 41);
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return 0;
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}
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