Method and system for managing heap across process replication
View Patent ↗A method and system for dynamically allocating memory, the method comprising maintaining a record of allocated memory that should be considered free in a child process, and designating as free any copy of memory identified by the record and created in a forking process.
1. A method for dynamically allocating memory, comprising:
maintaining a record of memory allocated in a parent process that is considered free in a child process prior to the child process occurring; and
designating as fork-free any copy of memory identified by said record and created in a forking process.
2. A method for dynamically allocating memory, comprising:
defining a first memory allocation routine during a parent process for allocating memory a replication of which, when created in a forking process, is treated as allocated prior to the child process occurring; and
defining a second memory allocation routine during a parent process for allocating memory a replication of which, when created in a forking process, is treated as free prior to the child process occurring.
3. The method as claimed in claim 2 , comprising:
responding to said first memory allocation routine by allocating memory and, upon replication of said memory in a forking process to make a copy of said memory, treating said copy of said memory as allocated; and
responding to said second memory allocation routine by allocating memory and, upon replication of said memory in a forking process to make a copy of said memory, treating said copy of said memory as free.
4. A computing system, comprising:
an operating system configured to maintain a record of allocated memory during a parent process a copy of which is free in a child process prior to the child process occurring and to designate as fork-free any copy of said allocated memory identified by said record and created in a forking process.
5. A computing system, comprising:
a first memory allocation routine created during a parent process for allocating memory a copy of which is treated as allocated in any child process prior to the child process occurring; and
a second memory allocation routine created during a parent process for allocating memory a copy of which is treated as free in any child process prior to the child process occurring;
wherein said system is configured to respond to said first memory allocation routine in a parent process by allocating memory and, upon replication of said allocated memory in a forking process, treating a resulting copy of said allocated memory as allocated in a child process of said parent process and to respond to said second memory allocation routine in a parent process by allocating memory and, upon replication of said allocated memory in a forking process, treating a resulting copy of said allocated memory as free in a child process of said parent process.
6. The system as claimed in claim 5 , including a memory allocation routine comprising said first memory allocation routine and said second memory allocation routine.
7. An operating system, comprising:
a first memory allocation routine created during a parent process for allocating memory a copy of which is treated as allocated in any child process prior to the child process occurring; and
a second memory allocation routine created during a parent process for allocating memory a copy of which is treated as free in any child process prior to the child process occurring;
wherein said first memory allocation routine is configured when invoked in a parent process to allocate memory and, upon replication of said allocated memory in a forking process, to treat a resulting copy of said allocated memory as allocated in any child process of said parent process and said second memory allocation routine is configured when invoked in a parent process to allocate memory and, upon replication of said allocated memory in a forking process, to treat a resulting copy of said allocated memory as free in any child process of said parent process.
8. The operating system as claimed in claim 7 , including a memory allocation routine comprising said first memory allocation routine and said second memory allocation routine.
9. A non-transitory computer readable medium provided with program data that, when executed on a computing system, implements the method of claim 1 .
10. A non-transitory computer readable medium provided with program data that, when executed on a computing system, implements the method of claim 2 .