src/hotspot/share/include/cds.h

@@ -31,16 +31,19 @@
 // We should use only standard C types. Do not use custom types such as bool, intx,
 // etc, to avoid introducing unnecessary dependencies to other HotSpot type declarations.
 //
 // Also, this is a C header file. Do not use C++ here.
 
-#define NUM_CDS_REGIONS 9
+#define NUM_CDS_REGIONS 8
 #define CDS_ARCHIVE_MAGIC 0xf00baba2
 #define CDS_DYNAMIC_ARCHIVE_MAGIC 0xf00baba8
-#define CURRENT_CDS_ARCHIVE_VERSION 5
+#define CDS_END_MAGIC     0xf00babae
+#define CURRENT_CDS_ARCHIVE_VERSION 6
 #define INVALID_CDS_ARCHIVE_VERSION -1
 
+#define JVM_IDENT_MAX 256
+
 struct CDSFileMapRegion {
   int        _crc;           // crc checksum of the current space
   size_t     _file_offset;   // sizeof(this) rounded to vm page size
   union {
     char*    _base;          // copy-on-write base address

@@ -56,10 +59,12 @@
 
 struct CDSFileMapHeaderBase {
   unsigned int _magic;           // identify file type
   int          _crc;             // header crc checksum
   int          _version;         // must be CURRENT_CDS_ARCHIVE_VERSION
+  char  _jvm_ident[JVM_IDENT_MAX]; // identifier of the JVM with which this archive was generated
+  unsigned int _end_magic;         // fixed identifier following _jvm_ident
   struct CDSFileMapRegion _space[NUM_CDS_REGIONS];
 };
 
 typedef struct CDSFileMapHeaderBase CDSFileMapHeaderBase;