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nub31
2025-02-02 22:46:34 +01:00
parent c0798eff3d
commit 19d0365932
1 changed files with 15 additions and 15 deletions
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30
input/baseline/gc.asm
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@@ -1,14 +1,14 @@
global gc_init, gc_alloc global gc_init, gc_alloc
section .bss section .bss
alloc_list: resq 1 alloc_list: resq 1
stack_start: resq 1 stack_start: resq 1
section .data section .data
gc_threshold_b: dq 4096 ; default of 4096 bytes, this will scale when gc_collect is ran gc_threshold_b: dq 4096 ; default of 4096 bytes, this will scale when gc_collect is ran
gc_threshold_c: dq 1024 ; default of 1024 allocations gc_threshold_c: dq 1024 ; default of 1024 allocations
total_alloc_b: dq 0 ; counts the allocated bytes total_alloc_b: dq 0 ; counts the allocated bytes
total_alloc_c: dq 0 ; count the amount of allocations total_alloc_c: dq 0 ; count the amount of allocations
section .text section .text
gc_init: gc_init:
@@ -32,14 +32,14 @@ gc_alloc:
add [total_alloc_b], rdi ; update total allocated bytes add [total_alloc_b], rdi ; update total allocated bytes
inc qword [total_alloc_c] ; update total allocation count inc qword [total_alloc_c] ; update total allocation count
push rdi push rdi
call sys_mmap ; allocate size + metadata call sys_mmap ; allocate size + metadata
pop rdi pop rdi
mov byte [rax], 0 ; set mark to 0 mov byte [rax], 0 ; set mark to 0
mov qword [rax + 1], rdi ; set total size of object (including metadata) mov qword [rax + 1], rdi ; set total size of object (including metadata)
mov rsi, [alloc_list] ; load first item in allocation list mov rsi, [alloc_list] ; load first item in allocation list
mov qword [rax + 9], rsi ; make current head of allocation list the next item in this object mov qword [rax + 9], rsi ; make current head of allocation list the next item in this object
mov [alloc_list], rax ; update head of allocation list so it points to this object mov [alloc_list], rax ; update head of allocation list so it points to this object
add rax, 17 ; skip metadata for return value add rax, 17 ; skip metadata for return value
ret ret
gc_collect: gc_collect:
@@ -53,7 +53,7 @@ gc_collect:
mov qword [gc_threshold_b], rax ; update threshold to new value mov qword [gc_threshold_b], rax ; update threshold to new value
ret ret
gc_mark_stack: gc_mark_stack:
mov r8, rsp ; load current stack pointer mov r8, rsp ; load current stack pointer
mov r9, [stack_start] ; load start of stack mov r9, [stack_start] ; load start of stack
.loop: .loop:
@@ -116,7 +116,7 @@ gc_sweep:
mov [rsi + 9], rdx ; unlink the current node by setting the previous node's next to the next node's address mov [rsi + 9], rdx ; unlink the current node by setting the previous node's next to the next node's address
jmp .free_memory jmp .free_memory
.remove_head: .remove_head:
mov [alloc_list], rdx ; update head node to be the next node mov [alloc_list], rdx ; update head node to be the next node
.free_memory: .free_memory:
push rsi ; save previous node since it will also be the previous node for the next item push rsi ; save previous node since it will also be the previous node for the next item
push rdx ; save next node push rdx ; save next node