WO2019171114A1 - Garbage collector service for process in cloud - Google Patents
Garbage collector service for process in cloud Download PDFInfo
- Publication number
- WO2019171114A1 WO2019171114A1 PCT/IB2018/051384 IB2018051384W WO2019171114A1 WO 2019171114 A1 WO2019171114 A1 WO 2019171114A1 IB 2018051384 W IB2018051384 W IB 2018051384W WO 2019171114 A1 WO2019171114 A1 WO 2019171114A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- state
- heap
- application program
- references
- garbage collector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/40—Transformation of program code
- G06F8/41—Compilation
- G06F8/44—Encoding
- G06F8/443—Optimisation
- G06F8/4434—Reducing the memory space required by the program code
Definitions
- Synthesis phase creates an equivalent target program from the intermediate representation.
- Symbol Table is a data structure maintained by compilers, consists all the identifier’s name along with their types. It helps the compiler to function smoothly by finding the identifiers quickly.
- compiler has six stages consisting of Lexical Analyser, Syntax Analyser, Semantic Analyser, Intermediate Code Generator, Code Optimizer and Target Code Generator.
- Lexical Analyser Syntax Analyser
- Semantic Analyser Semantic Analyser
- Intermediate Code Generator Code Optimizer
- Target Code Generator To facilitate Garbage Collector Service for the program or process we in the Code Optimizer phase build a graph of state transitions for various function calls of the application program like state of the program changes from state A to state B when function A invokes function B.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Devices For Executing Special Programs (AREA)
Abstract
Typically compiler has six phases and to facilitate Garbage Collector thService for the program or process we in the Code Optimizer phase (5 phase) build a graph of state transitions for various function calls of the application program like state of the program changes from state A to state B when function A invokes function B. Also in addition to the above state transitions we also maintain for each state the references to already allocated heap memory locations (or heap variables) and references to newly allocated heap memory locations. Now this information helps the Garbage Collector Service process or thread for the application program to not free or garbage collect those heap variables or heap memory locations which currently do not have any reference or have a reference count of zero but have references in future states in the state transitions for that application program.
Description
Garbage Collector Service for Process in Cloud
In this invention we have a garbage collector service for different processes of an application running in cloud. Generally compilers for any language will have Analysis phase and Synthesis phase. Analysis phase creates an
intermediate representation from the given source code. Synthesis phase creates an equivalent target program from the intermediate representation. Symbol Table is a data structure maintained by compilers, consists all the identifier’s name along with their types. It helps the compiler to function smoothly by finding the identifiers quickly. Typically compiler has six stages consisting of Lexical Analyser, Syntax Analyser, Semantic Analyser, Intermediate Code Generator, Code Optimizer and Target Code Generator. To facilitate Garbage Collector Service for the program or process we in the Code Optimizer phase build a graph of state transitions for various function calls of the application program like state of the program changes from state A to state B when function A invokes function B. Also in addition to the above state transitions we also maintain for each state the references to already allocated heap memory locations (or heap variables) and references to newly allocated heap memory locations (or heap variables). Now this information helps the Garbage Collector Service process or thread for the application program to not free or garbage collect those heap variables or heap memory locations which currently do not have any reference or have a reference count of zero but have references in future states (or function calls) in the state transitions for that application program. Also Garbage Collector Service process or thread for the application program will be triggered when the reference count for a heap variable or heap memory location is zero or when the scope of a variable like a stack variable has ended and also to garbage collect remaining variables or references after the application program has terminated.
Claims
1. In this invention we have a garbage collector service for different
processes of an application running in cloud. Generally compilers for any language will have Analysis phase and Synthesis phase. Analysis phase creates an intermediate representation from the given source code.
Synthesis phase creates an equivalent target program from the
intermediate representation. Symbol Table is a data structure maintained by compilers, consists all the identifier’s name along with their types. It helps the compiler to function smoothly by finding the identifiers quickly. Typically compiler has six stages consisting of Lexical Analyser, Syntax Analyser, Semantic Analyser, Intermediate Code Generator, Code
Optimizer and Target Code Generator. To facilitate Garbage Collector Service for the program or process we in the Code Optimizer phase build a graph of state transitions for various function calls of the application program like state of the program changes from state A to state B when function A invokes function B. Also in addition to the above state transitions we also maintain for each state the references to already allocated heap memory locations (or heap variables) and references to newly allocated heap memory locations (or heap variables). Now this information helps the Garbage Collector Service process or thread for the application program to not free or garbage collect those heap variables or heap memory locations which currently do not have any reference or have a reference count of zero but have references in future states (or function calls) in the state transitions for that application program. Also Garbage Collector Service process or thread for the application program will be triggered when the reference count for a heap variable or heap memory location is zero or when the scope of a variable like a stack variable has ended and also to garbage collect remaining variables or references after the application program has terminated. The above novel technique of providing Garbage Collector Service for a process in cloud is the claim for this invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2018/051384 WO2019171114A1 (en) | 2018-03-05 | 2018-03-05 | Garbage collector service for process in cloud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2018/051384 WO2019171114A1 (en) | 2018-03-05 | 2018-03-05 | Garbage collector service for process in cloud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019171114A1 true WO2019171114A1 (en) | 2019-09-12 |
Family
ID=67845890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2018/051384 Ceased WO2019171114A1 (en) | 2018-03-05 | 2018-03-05 | Garbage collector service for process in cloud |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2019171114A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150100752A1 (en) * | 2013-10-08 | 2015-04-09 | Red Hat, Inc. | Concurrent Garbage Collector Thread |
| US9430153B2 (en) * | 2014-10-22 | 2016-08-30 | International Business Machines Corporation | Garbage collection and other management of memory heaps |
-
2018
- 2018-03-05 WO PCT/IB2018/051384 patent/WO2019171114A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150100752A1 (en) * | 2013-10-08 | 2015-04-09 | Red Hat, Inc. | Concurrent Garbage Collector Thread |
| US9430153B2 (en) * | 2014-10-22 | 2016-08-30 | International Business Machines Corporation | Garbage collection and other management of memory heaps |
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