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src/hotspot/share/memory/filemap.cpp
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@@ -657,11 +657,11 @@
// Memory map a region in the address space.
static const char* shared_region_name[] = { "MiscData", "ReadWrite", "ReadOnly", "MiscCode", "OptionalData",
"String1", "String2", "OpenArchive1", "OpenArchive2" };
-char* FileMapInfo::map_region(int i) {
+char* FileMapInfo::map_region(int i, char** top_ret) {
assert(!MetaspaceShared::is_heap_region(i), "sanity");
struct FileMapInfo::FileMapHeader::space_info* si = &_header->_space[i];
size_t used = si->_used;
size_t alignment = os::vm_allocation_granularity();
size_t size = align_up(used, alignment);
@@ -684,10 +684,16 @@
// This call is Windows-only because the memory_type gets recorded for the other platforms
// in method FileMapInfo::reserve_shared_memory(), which is not called on Windows.
MemTracker::record_virtual_memory_type((address)base, mtClassShared);
#endif
+
+ if (!verify_region_checksum(i)) {
+ return NULL;
+ }
+
+ *top_ret = base + size;
return base;
}
static MemRegion *string_ranges = NULL;
static MemRegion *open_archive_heap_ranges = NULL;
@@ -1038,31 +1044,10 @@
_paths_misc_info = NULL;
}
return status;
}
-// The following method is provided to see whether a given pointer
-// falls in the mapped shared metadata space.
-// Param:
-// p, The given pointer
-// Return:
-// True if the p is within the mapped shared space, otherwise, false.
-bool FileMapInfo::is_in_shared_space(const void* p) {
- for (int i = 0; i < MetaspaceShared::num_non_heap_spaces; i++) {
- char *base;
- if (_header->_space[i]._used == 0) {
- continue;
- }
- base = _header->region_addr(i);
- if (p >= base && p < base + _header->_space[i]._used) {
- return true;
- }
- }
-
- return false;
-}
-
// Check if a given address is within one of the shared regions
bool FileMapInfo::is_in_shared_region(const void* p, int idx) {
assert(idx == MetaspaceShared::ro ||
idx == MetaspaceShared::rw ||
idx == MetaspaceShared::mc ||
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