72 _base(0),
73 _size(0),
74 _initialized(false) {
75
76 // Reserve address space for virtual backing file
77 _base = (uintptr_t)os::reserve_memory(MaxHeapSize);
78 if (_base == 0) {
79 // Failed
80 log_error(gc)("Failed to reserve address space for virtual backing file");
81 return;
82 }
83
84 // Successfully initialized
85 _initialized = true;
86 }
87
88 bool ZBackingFile::is_initialized() const {
89 return _initialized;
90 }
91
92 size_t ZBackingFile::size() const {
93 return _size;
94 }
95
96 bool ZBackingFile::commit_inner(size_t offset, size_t length) {
97 assert(is_aligned(offset, os::vm_page_size()), "Invalid offset");
98 assert(is_aligned(length, os::vm_page_size()), "Invalid length");
99
100 log_trace(gc, heap)("Committing memory: " SIZE_FORMAT "M-" SIZE_FORMAT "M (" SIZE_FORMAT "M)",
101 offset / M, (offset + length) / M, length / M);
102
103 const uintptr_t addr = _base + offset;
104 const void* const res = mmap((void*)addr, length, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
105 if (res == MAP_FAILED) {
106 ZErrno err;
107 log_error(gc)("Failed to commit memory (%s)", err.to_string());
108 return false;
109 }
110
111 const size_t end = offset + length;
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72 _base(0),
73 _size(0),
74 _initialized(false) {
75
76 // Reserve address space for virtual backing file
77 _base = (uintptr_t)os::reserve_memory(MaxHeapSize);
78 if (_base == 0) {
79 // Failed
80 log_error(gc)("Failed to reserve address space for virtual backing file");
81 return;
82 }
83
84 // Successfully initialized
85 _initialized = true;
86 }
87
88 bool ZBackingFile::is_initialized() const {
89 return _initialized;
90 }
91
92 void ZBackingFile::warn_commit_limits(size_t max) const {
93 // Does nothing
94 }
95
96 size_t ZBackingFile::size() const {
97 return _size;
98 }
99
100 bool ZBackingFile::commit_inner(size_t offset, size_t length) {
101 assert(is_aligned(offset, os::vm_page_size()), "Invalid offset");
102 assert(is_aligned(length, os::vm_page_size()), "Invalid length");
103
104 log_trace(gc, heap)("Committing memory: " SIZE_FORMAT "M-" SIZE_FORMAT "M (" SIZE_FORMAT "M)",
105 offset / M, (offset + length) / M, length / M);
106
107 const uintptr_t addr = _base + offset;
108 const void* const res = mmap((void*)addr, length, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
109 if (res == MAP_FAILED) {
110 ZErrno err;
111 log_error(gc)("Failed to commit memory (%s)", err.to_string());
112 return false;
113 }
114
115 const size_t end = offset + length;
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