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d63a294e1f
The glibc implementation of malloc (commonly used on Linux) can use sbrk to acquire more memory, and so does Boehm GC in its default configuration on Linux. When both allocators are invoked simultaneously from different threads then memory corruption may result. configure.ac: Add --enable-gc-mmap option. Make --enable-gc-munmap imply --enable-gc-mmap. Detect mmap and set MR_HAVE_MMAP. Detect sbrk and set MR_HAVE_SBRK. On Linux (and potentially other platforms), build Boehm GC for threaded grades with -DUSE_MMAP if mmap was found. Mmake.common.in: Add ENABLE_BOEHM_USE_MMAP. runtime/mercury_conf.h.in: Add MR_HAVE_MMAP, although it is not used anywhere yet. Add MR_HAVE_SBRK. It is only for used by the test program. tests/hard_coded/Mmakefile: tests/hard_coded/thread_sbrk.exp: tests/hard_coded/thread_sbrk.exp2: tests/hard_coded/thread_sbrk.m: Add test program. NEWS: Announce changes.
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391 B
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22 lines
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