System and method for lazy loading of shared libraries
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United States of America Patent
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Jan 13, 1998
Grant Date -
N/A
app pub date -
Feb 21, 1995
filing date -
Feb 26, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Lazy loading of executable library objects reduces operating system overhead and memory commitment requirements by postponing object loading until object references are expected. Initial task loading allocates only the main executable and library objects referenced by that executable. Secondary referenced objects are not allocated. Object references cause page faults for allocated but not loaded pages. Page fault handling causes loading and fixup of executable objects. Page fault handling also determines the next level of object references and allocates memory for the next object level. Shared memory systems allow sharing of executable objects until explicitly referenced. Once referenced, memory fault causes copying and fixup to referencing task memory area.
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