Conservative garbage collectors that can be used with...

G - Physics – 06 – F

Patent

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G06F 12/00 (2006.01) G06F 12/02 (2006.01)

Patent

CA 2421591

A technique that permits a conservative garbage collector to be used with the heap management functions provided by an allocator which is independent of the garbage collector. The allocator and the garbage collector (139) employ a malloc table (319) to exchange information about the heap (125). When the allocator determines that determines that garbage collection is required, the allocator makes a current heap map in the malloc table that specifies the location of each block in the current heap and whether the block is collectible by the garbage collector. The allocator then invokes the garbage collector, which uses the current heap map in its mark cycle to make a mark list that indicates which of the heap blocks are pointed to by apparent pointers in the processer's address space.

L'invention concerne une technique qui permet d'utiliser un ramasse-miettes avec des fonctions de gestion des tas assurées par un allocateur indépendant du ramasse-miettes. Ce dispositif et le ramasse-miettes (139) utilisent une table malloc (319) pour échanger des informations concernant le tas (125). Lorsque l'allocateur détermine qu'il est nécessaire d'avoir un ramasse-miettes, l'allocateur réalise une table de tas dans la table malloc qui spécifie l'emplacement de chaque bloc dans le tas et si ce bloc peut être collecté par le ramasse-miettes. L'allocateur appelle ensuite le ramasse-miettes qui utilise la table de correspondance des tas dans son cycle de marque pour élaborer une liste de marques qui indiquent quels sont les blocs désignés par les pointeurs dans l'espace d'adresses du processeur.

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