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First version of mark-compact GC, runtime.c is severely outdated at the moment

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Egor Sheremetov 2023-03-27 10:09:54 +02:00
parent 413ab65b1f
commit 113c57e7c8
6 changed files with 752 additions and 243 deletions
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12
runtime/gc_runtime.s
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@ -50,7 +50,7 @@ __post_gc:
__post_gc2:
popl %eax
ret
// Scan stack for roots
// strting from __gc_stack_top
// till __gc_stack_bottom
@ -68,13 +68,13 @@ loop:
// check that it is not a pointer to code section
// i.e. the following is not true:
// __executable_start <= (%eax) <= __etext
check11:
check11:
leal __executable_start, %edx
cmpl %ebx, %edx
jna check12
jmp check21
check12:
check12:
leal __etext, %edx
cmpl %ebx, %edx
jnb next
@ -82,7 +82,7 @@ check12:
// check that it is not a pointer into the program stack
// i.e. the following is not true:
// __gc_stack_bottom <= (%eax) <= __gc_stack_top
check21:
check21:
cmpl %ebx, __gc_stack_top
jna check22
jmp loop2
@ -99,7 +99,7 @@ loop2:
gc_run_t:
pushl %eax
pushl %eax
call gc_test_and_copy_root
call gc_test_and_mark_root
addl $4, %esp
popl %eax
@ -111,6 +111,6 @@ returnn:
movl $0, %eax
popl %edx
popl %ebx
movl %ebp, %esp
movl %ebp, %esp
popl %ebp
ret