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8044269: Analysis of archive files

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Add checksum verification.

Reviewed-by: iklam, dholmes, mschoene
This commit is contained in:
Jiangli Zhou 2014-10-14 18:47:46 -07:00
parent a71432a188
commit ad65e81ce7
7 changed files with 72 additions and 5 deletions
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10
hotspot/src/share/vm/memory/filemap.hpp
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@ -61,7 +61,7 @@ private:
bool _file_open;
int _fd;
long _file_offset;
size_t _file_offset;
private:
static SharedClassPathEntry* _classpath_entry_table;
@ -87,12 +87,14 @@ public:
}
int _magic; // identify file type.
int _crc; // header crc checksum.
int _version; // (from enum, above.)
size_t _alignment; // how shared archive should be aligned
int _obj_alignment; // value of ObjectAlignmentInBytes
struct space_info {
int _file_offset; // sizeof(this) rounded to vm page size
int _crc; // crc checksum of the current space
size_t _file_offset; // sizeof(this) rounded to vm page size
char* _base; // copy-on-write base address
size_t _capacity; // for validity checking
size_t _used; // for setting space top on read
@ -135,6 +137,7 @@ public:
virtual bool validate();
virtual void populate(FileMapInfo* info, size_t alignment);
int compute_crc();
};
FileMapHeader * _header;
@ -153,6 +156,8 @@ public:
~FileMapInfo();
static int current_version() { return _current_version; }
int compute_header_crc() { return _header->compute_crc(); }
void set_header_crc(int crc) { _header->_crc = crc; }
void populate_header(size_t alignment);
bool validate_header();
void invalidate();
@ -181,6 +186,7 @@ public:
void write_bytes_aligned(const void* buffer, int count);
char* map_region(int i);
void unmap_region(int i);
bool verify_region_checksum(int i);
void close();
bool is_open() { return _file_open; }
ReservedSpace reserve_shared_memory();