66     int32_t* addr = reinterpret_cast<int32_t*>(  in BasicTest()  local
68     CHECK(addr != nullptr);  in BasicTest()
69     CHECK_NE(addr, MAP_FAILED);  in BasicTest()
72     addr[0] = 42;  in BasicTest()
73     CHECK_EQ(addr[0], 42);  in BasicTest()
80     addr[0] = 2;  in BasicTest()
81     CHECK_EQ(addr[0], 2);  in BasicTest()
89     CHECK_EQ(mprotect(addr, size, PROT_READ), 0) << strerror(errno);  in BasicTest()
90     CHECK_EQ(mprotect(addr, size, PROT_READ | PROT_WRITE), 0) << strerror(errno);  in BasicTest()
95     addr2 = reinterpret_cast<int32_t*>(mremap(addr, 0, kPageSize, MREMAP_MAYMOVE));  in BasicTest()
102     addr2 = reinterpret_cast<int32_t*>(mremap(addr, kPageSize, 2 * kPageSize, MREMAP_MAYMOVE));  in BasicTest()
115     int32_t* addr = nullptr;  in TestUnmapWritableAfterFork()  local
122       addr = reinterpret_cast<int32_t*>(  in TestUnmapWritableAfterFork()
124       CHECK(addr != nullptr);  in TestUnmapWritableAfterFork()
125       CHECK_NE(addr, MAP_FAILED);  in TestUnmapWritableAfterFork()
128       addr[0] = 42;  in TestUnmapWritableAfterFork()
129       CHECK_EQ(addr[0], 42);  in TestUnmapWritableAfterFork()
155     addr[0] = starting_value;  in TestUnmapWritableAfterFork()
156     CHECK_EQ(addr[0], starting_value);  in TestUnmapWritableAfterFork()
161       addr[0] = child_value;  in TestUnmapWritableAfterFork()
162       CHECK_EQ(addr[0], child_value);  in TestUnmapWritableAfterFork()
166       munmap(addr, kPageSize);  in TestUnmapWritableAfterFork()
181       gAddrToFaultOn = addr;  in TestUnmapWritableAfterFork()
184       addr[0] = child_value + 1;  in TestUnmapWritableAfterFork()
190       CHECK_EQ(addr[0], child_value);  in TestUnmapWritableAfterFork()
192       addr[0] = parent_value;  in TestUnmapWritableAfterFork()
199       CHECK_EQ(addr[0], parent_value);  in TestUnmapWritableAfterFork()
201       munmap(addr, kPageSize);  in TestUnmapWritableAfterFork()
212     int32_t* addr = nullptr;  in TestMadviseDontFork()  local
219       addr = reinterpret_cast<int32_t*>(  in TestMadviseDontFork()
221       CHECK(addr != nullptr);  in TestMadviseDontFork()
222       CHECK_NE(addr, MAP_FAILED);  in TestMadviseDontFork()
223       CHECK_EQ(madvise(addr, kPageSize, MADV_DONTFORK), 0);  in TestMadviseDontFork()
226       addr[0] = 42;  in TestMadviseDontFork()
227       CHECK_EQ(addr[0], 42);  in TestMadviseDontFork()
253     addr[0] = starting_value;  in TestMadviseDontFork()
254     CHECK_EQ(addr[0], starting_value);  in TestMadviseDontFork()
271       gAddrToFaultOn = addr;  in TestMadviseDontFork()
273       addr[0] = child_value + 1;  in TestMadviseDontFork()
279       CHECK_EQ(addr[0], starting_value);  in TestMadviseDontFork()
281       addr[0] = parent_value;  in TestMadviseDontFork()
288       CHECK_EQ(addr[0], parent_value);  in TestMadviseDontFork()
291       munmap(addr, kPageSize);  in TestMadviseDontFork()
311     int32_t* addr = nullptr;  in TestFromSharedToPrivate()  local
316     addr = reinterpret_cast<int32_t*>(  in TestFromSharedToPrivate()
318     CHECK(addr != nullptr);  in TestFromSharedToPrivate()
319     CHECK_NE(addr, MAP_FAILED);  in TestFromSharedToPrivate()
322     addr[0] = 42;  in TestFromSharedToPrivate()
323     CHECK_EQ(addr[0], 42);  in TestFromSharedToPrivate()
341     addr[0] = starting_value;  in TestFromSharedToPrivate()
345       CHECK_EQ(mmap(addr, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd.get(), 0),  in TestFromSharedToPrivate()
346                addr);  in TestFromSharedToPrivate()
347       addr[0] = child_value;  in TestFromSharedToPrivate()
353       CHECK_EQ(addr[0], starting_value);  in TestFromSharedToPrivate()
356     addr[0] = starting_value;  in TestFromSharedToPrivate()
364       CHECK_EQ(mmap(addr, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd.get(), 0),  in TestFromSharedToPrivate()
365                addr);  in TestFromSharedToPrivate()
366       addr[0] = child_value;  in TestFromSharedToPrivate()
367       CHECK_EQ(addr[0], child_value);  in TestFromSharedToPrivate()
370       CHECK_EQ(mmap(addr, kPageSize, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, fd.get(), 0),  in TestFromSharedToPrivate()
375       CHECK_EQ(mmap(addr, kPageSize, PROT_READ, MAP_SHARED | MAP_FIXED, fd.get(), 0), addr);  in TestFromSharedToPrivate()
376       CHECK_NE(addr[0], child_value);  in TestFromSharedToPrivate()
382       CHECK_EQ(addr[0], parent_value);  in TestFromSharedToPrivate()
388       CHECK_EQ(mmap(addr, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd.get(), 0),  in TestFromSharedToPrivate()
389                addr);  in TestFromSharedToPrivate()
390       addr[0] = child_value + 1;  in TestFromSharedToPrivate()
391       CHECK_EQ(addr[0], child_value + 1);  in TestFromSharedToPrivate()
394       CHECK_EQ(mmap(addr, kPageSize, PROT_READ, MAP_SHARED | MAP_FIXED, fd.get(), 0), addr);  in TestFromSharedToPrivate()
398       CHECK_EQ(addr[0], parent_value + 1);  in TestFromSharedToPrivate()
401       addr[0] = parent_value;  in TestFromSharedToPrivate()
402       CHECK_EQ(addr[0], parent_value);  in TestFromSharedToPrivate()
411       addr[0] = parent_value + 1;  in TestFromSharedToPrivate()
412       CHECK_EQ(addr[0], parent_value + 1);  in TestFromSharedToPrivate()
419       CHECK_EQ(addr[0], parent_value + 1);  in TestFromSharedToPrivate()
425     addr[0] = starting_value;  in TestFromSharedToPrivate()
428       CHECK_EQ(mmap(addr, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd.get(), 0),  in TestFromSharedToPrivate()
429                addr);  in TestFromSharedToPrivate()
430       CHECK_EQ(addr[0], starting_value);  in TestFromSharedToPrivate()
431       addr[0] = child_value;  in TestFromSharedToPrivate()
432       CHECK_EQ(addr[0], child_value);  in TestFromSharedToPrivate()
442       CHECK_EQ(addr[0], child_value);  in TestFromSharedToPrivate()
445       CHECK_EQ(mmap(addr, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd.get(), 0),  in TestFromSharedToPrivate()
446                addr);  in TestFromSharedToPrivate()
447       CHECK_EQ(addr[0], parent_value);  in TestFromSharedToPrivate()
454       CHECK_EQ(addr[0], starting_value);  in TestFromSharedToPrivate()
455       addr[0] = parent_value;  in TestFromSharedToPrivate()
461       CHECK_EQ(addr[0], parent_value);  in TestFromSharedToPrivate()
467     addr[0] = starting_value;  in TestFromSharedToPrivate()
470       CHECK_EQ(mmap(addr, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd.get(), 0),  in TestFromSharedToPrivate()
471                addr);  in TestFromSharedToPrivate()
472       CHECK_EQ(addr[0], starting_value);  in TestFromSharedToPrivate()
475       while (addr[0] != parent_value) {  in TestFromSharedToPrivate()
478       addr[0] = child_value;  in TestFromSharedToPrivate()
479       CHECK_EQ(addr[0], child_value);  in TestFromSharedToPrivate()
485       CHECK_EQ(addr[0], starting_value);  in TestFromSharedToPrivate()
486       addr[0] = parent_value;  in TestFromSharedToPrivate()
490       CHECK_EQ(addr[0], parent_value);  in TestFromSharedToPrivate()
492     munmap(addr, kPageSize);  in TestFromSharedToPrivate()