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Always allocate linear memory using mmap (#3052)

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With this approach we can omit using memset() for the newly allocated memory
therefore the physical pages are not being used unless touched by the program.

This also simplifies the implementation.
This commit is contained in:
Marcin Kolny
2024-02-02 14:17:44 +00:00
committed by GitHub
parent 2eb60060d8
commit a27ddece7f
25 changed files with 384 additions and 425 deletions
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7
core/shared/platform/include/platform_api_vmcore.h
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@ -132,7 +132,7 @@ enum {
MMAP_MAP_32BIT = 1,
/* Don't interpret addr as a hint: place the mapping at exactly
that address. */
MMAP_MAP_FIXED = 2
MMAP_MAP_FIXED = 2,
};
void *
@ -142,6 +142,11 @@ os_munmap(void *addr, size_t size);
int
os_mprotect(void *addr, size_t size, int prot);
/* Doesn't guarantee that protection flags will be preserved.
os_mprotect() must be called after remapping. */
void *
os_mremap(void *old_addr, size_t old_size, size_t new_size);
#if (WASM_MEM_DUAL_BUS_MIRROR != 0)
void *
os_get_dbus_mirror(void *ibus);