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syscalls: Add mmap support.

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* guix/build/syscalls.scm (PROT_NONE, PROT_READ, PROT_WRITE, PROT_EXEC)
(PROT_SEM, MAP_SHARED, MAP_PRIVATE, MAP_FAILED)
(MS_ASYNC, MS_INVALIDATE, MS_SYNC)
(%mmap-guardian, %unmapped-bytevectors): New variables.
(unmapped-bytevector?, pump-mmap-guardian, %mmap, mmap, %munmap, munmap)
(%msync, msync): New procedures.
* guix/build/io.scm: New file.
* Makefile.am: Register it.
* tests/syscalls.scm (strace-output): New variable.
("mmap and munmap", "file->bytevector, reading", "file->bytevector, writing")
("manual munmap does not lead to double free"): New tests.

Change-Id: I19ec687899eda635559e91200dd8d98669b0e35f
This commit is contained in:
Maxim Cournoyer
2025-10-21 23:22:24 +09:00
parent 36a90a1a04
commit e1994a0214
4 changed files with 238 additions and 3 deletions
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1
Makefile.am
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@@ -265,6 +265,7 @@ MODULES = \
guix/build/kconfig.scm \
guix/build/linux-module-build-system.scm \
guix/build/store-copy.scm \
guix/build/io.scm \
guix/build/json.scm \
guix/build/pack.scm \
guix/build/utils.scm \