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Disable mmap on WASM

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WASM does not have proper support for mmap.
This commit is contained in:
Peter Zhu 2022-04-01 13:31:19 -04:00
parent c482ee4025
commit ea9c09a92c
Notes: git 2022-04-04 22:27:40 +09:00 
Merged: https://github.com/ruby/ruby/pull/5749
1 changed files with 7 additions and 2 deletions
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9
gc.c
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@ -882,7 +882,12 @@ enum {
#endif #endif
#ifdef HAVE_MMAP #ifdef HAVE_MMAP
# if HAVE_CONST_PAGE_SIZE /* wasmtime does not have proper support for mmap.
* See https://github.com/bytecodealliance/wasmtime/blob/main/docs/WASI-rationale.md#why-no-mmap-and-friends
*/
# if defined(__wasm__)
static const bool HEAP_PAGE_ALLOC_USE_MMAP = false;
# elif HAVE_CONST_PAGE_SIZE
/* If we have the HEAP_PAGE and it is a constant, then we can directly use it. */ /* If we have the HEAP_PAGE and it is a constant, then we can directly use it. */
static const bool HEAP_PAGE_ALLOC_USE_MMAP = (PAGE_SIZE <= HEAP_PAGE_SIZE); static const bool HEAP_PAGE_ALLOC_USE_MMAP = (PAGE_SIZE <= HEAP_PAGE_SIZE);
# elif defined(PAGE_MAX_SIZE) && (PAGE_MAX_SIZE <= HEAP_PAGE_SIZE) # elif defined(PAGE_MAX_SIZE) && (PAGE_MAX_SIZE <= HEAP_PAGE_SIZE)
@ -3632,7 +3637,7 @@ Init_heap(void)
{ {
rb_objspace_t *objspace = &rb_objspace; rb_objspace_t *objspace = &rb_objspace;
#if defined(HAVE_MMAP) && !HAVE_CONST_PAGE_SIZE && !defined(PAGE_MAX_SIZE) #if defined(HAVE_MMAP) && !defined(__wasm__) && !HAVE_CONST_PAGE_SIZE && !defined(PAGE_MAX_SIZE)
/* Need to determine if we can use mmap at runtime. */ /* Need to determine if we can use mmap at runtime. */
# ifdef PAGE_SIZE # ifdef PAGE_SIZE
/* If the PAGE_SIZE macro can be used. */ /* If the PAGE_SIZE macro can be used. */