forked from OSchip/llvm-project
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
// Test that mmap (without MAP_FIXED) always returns valid application addresses.
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// RUN: %clangxx_msan -O0 %s -o %t && %run %t
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// RUN: %clangxx_msan -O0 -fsanitize-memory-track-origins %s -o %t && %run %t
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#include <assert.h>
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#include <errno.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "test.h"
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bool AddrIsApp(void *p) {
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uintptr_t addr = (uintptr_t)p;
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#if defined(__FreeBSD__) && defined(__x86_64__)
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return addr < 0x010000000000ULL || addr >= 0x600000000000ULL;
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#elif defined(__x86_64__)
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return addr >= 0x600000000000ULL;
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#elif defined(__mips64)
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return addr >= 0x00e000000000ULL;
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#elif defined(__powerpc64__)
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return addr < 0x000100000000ULL || addr >= 0x300000000000ULL;
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#elif defined(__aarch64__)
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unsigned long vma = SystemVMA();
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if (vma == 39)
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return (addr >= 0x5500000000ULL && addr < 0x5600000000ULL) ||
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(addr > 0x7000000000ULL);
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else if (vma == 42)
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return (addr >= 0x2aa00000000ULL && addr < 0x2ab00000000ULL) ||
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(addr > 0x3f000000000ULL);
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else {
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fprintf(stderr, "unsupported vma: %lu\n", vma);
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exit(1);
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}
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#endif
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}
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int main() {
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// Large enough to quickly exhaust the entire address space.
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#if defined(__mips64) || defined(__aarch64__)
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const size_t kMapSize = 0x100000000ULL;
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#else
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const size_t kMapSize = 0x1000000000ULL;
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#endif
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int success_count = 0;
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while (true) {
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void *p = mmap(0, kMapSize, PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
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printf("%p\n", p);
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if (p == MAP_FAILED) {
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assert(errno == ENOMEM);
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break;
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}
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assert(AddrIsApp(p));
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success_count++;
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}
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printf("successful mappings: %d\n", success_count);
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assert(success_count > 5);
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}
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