18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #ifndef OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP
25 #define OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP
26
27 class ZErrno;
28
29 class ZPhysicalMemoryBacking {
30 private:
31 int _fd;
32 size_t _size;
33 uint64_t _filesystem;
34 size_t _block_size;
35 size_t _available;
36 bool _initialized;
37
38 void warn_available_space(size_t max) const;
39 void warn_max_map_count(size_t max) const;
40
41 int create_mem_fd(const char* name) const;
42 int create_file_fd(const char* name) const;
43 int create_fd(const char* name) const;
44
45 bool is_tmpfs() const;
46 bool is_hugetlbfs() const;
47 bool tmpfs_supports_transparent_huge_pages() const;
48
49 ZErrno fallocate_compat_mmap_hugetlbfs(size_t offset, size_t length, bool touch) const;
50 ZErrno fallocate_compat_mmap_tmpfs(size_t offset, size_t length) const;
51 ZErrno fallocate_compat_pwrite(size_t offset, size_t length) const;
52 ZErrno fallocate_fill_hole_compat(size_t offset, size_t length);
53 ZErrno fallocate_fill_hole_syscall(size_t offset, size_t length);
54 ZErrno fallocate_fill_hole(size_t offset, size_t length);
55 ZErrno fallocate_punch_hole(size_t offset, size_t length);
56 ZErrno split_and_fallocate(bool punch_hole, size_t offset, size_t length);
57 ZErrno fallocate(bool punch_hole, size_t offset, size_t length);
58
59 bool commit_inner(size_t offset, size_t length);
60 size_t commit_numa_interleaved(size_t offset, size_t length);
61 size_t commit_default(size_t offset, size_t length);
62
63 public:
64 ZPhysicalMemoryBacking(size_t max_capacity);
65
66 bool is_initialized() const;
67
68 void warn_commit_limits(size_t max) const;
69
70 size_t commit(size_t offset, size_t length);
71 size_t uncommit(size_t offset, size_t length);
72
73 void map(uintptr_t addr, size_t size, uintptr_t offset) const;
74 void unmap(uintptr_t addr, size_t size) const;
75 };
76
77 #endif // OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP
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18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #ifndef OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP
25 #define OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP
26
27 class ZErrno;
28
29 class ZPhysicalMemoryBacking {
30 private:
31 int _fd;
32 size_t _size;
33 uint64_t _filesystem;
34 size_t _block_size;
35 size_t _available;
36 bool _initialized;
37
38 void warn_available_space(size_t max_capacity) const;
39 void warn_max_map_count(size_t max_capacity) const;
40
41 int create_mem_fd(const char* name) const;
42 int create_file_fd(const char* name) const;
43 int create_fd(const char* name) const;
44
45 bool is_tmpfs() const;
46 bool is_hugetlbfs() const;
47 bool tmpfs_supports_transparent_huge_pages() const;
48
49 ZErrno fallocate_compat_mmap_hugetlbfs(size_t offset, size_t length, bool touch) const;
50 ZErrno fallocate_compat_mmap_tmpfs(size_t offset, size_t length) const;
51 ZErrno fallocate_compat_pwrite(size_t offset, size_t length) const;
52 ZErrno fallocate_fill_hole_compat(size_t offset, size_t length) const;
53 ZErrno fallocate_fill_hole_syscall(size_t offset, size_t length) const;
54 ZErrno fallocate_fill_hole(size_t offset, size_t length) const;
55 ZErrno fallocate_punch_hole(size_t offset, size_t length) const;
56 ZErrno split_and_fallocate(bool punch_hole, size_t offset, size_t length) const;
57 ZErrno fallocate(bool punch_hole, size_t offset, size_t length) const;
58
59 bool commit_inner(size_t offset, size_t length) const;
60 size_t commit_numa_interleaved(size_t offset, size_t length) const;
61 size_t commit_default(size_t offset, size_t length) const;
62
63 public:
64 ZPhysicalMemoryBacking(size_t max_capacity);
65
66 bool is_initialized() const;
67
68 void warn_commit_limits(size_t max_capacity) const;
69
70 size_t commit(size_t offset, size_t length) const;
71 size_t uncommit(size_t offset, size_t length) const;
72
73 bool map(uintptr_t addr, size_t size, uintptr_t offset) const;
74 void unmap(uintptr_t addr, size_t size) const;
75 };
76
77 #endif // OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP
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