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Debug GC glue enough that marking passes.

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This commit is contained in:
Graydon Hoare 2010-06-25 16:59:29 -07:00
parent 2a2474d497
commit d601b357ec
1 changed files with 33 additions and 16 deletions
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49
src/boot/be/x86.ml
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@ -758,11 +758,6 @@ let crawl_stack_calling_glue
let skip_jmp_fix = new_fixup "skip jump" in
let exit_jmp_fix = new_fixup "exit jump" in
mov (rc edx) (c task_ptr); (* switch back to rust stack *)
mov
(rc esp)
(c (edx_n Abi.task_field_rust_sp));
push (ro ebp); (* save ebp at entry *)
mark repeat_jmp_fix;
@ -810,10 +805,7 @@ let crawl_stack_calling_glue
let gc_glue
(e:Il.emitter)
: unit =
(* Mark pass. *)
crawl_stack_calling_glue e Abi.frame_glue_fns_field_mark;
(* Sweep pass. *)
let emit = Il.emit e in
let mov dst src = emit (Il.umov dst src) in
let push x = emit (Il.Push x) in
@ -824,11 +816,26 @@ let gc_glue
let ecx_n = word_n (Il.Hreg ecx) in
let codefix fix = Il.CodePtr (Il.ImmPtr (fix, Il.CodeTy)) in
let mark fix = Il.emit_full e (Some fix) [] Il.Dead in
let repeat_jmp_fix = new_fixup "repeat jump" in
let skip_jmp_fix = new_fixup "skip jump" in
let exit_jmp_fix = new_fixup "exit jump" in
mov (rc edx) (c task_ptr); (* switch back to rust stack *)
mov
(rc esp)
(c (edx_n Abi.task_field_rust_sp));
(* Mark pass. *)
save_callee_saves e;
push (ro eax);
crawl_stack_calling_glue e Abi.frame_glue_fns_field_mark;
(* For now, stop after marking; sweep is still buggy. *)
pop (rc eax);
restore_callee_saves e;
Il.emit e Il.Ret;
(* Sweep pass. *)
mov (rc edx) (c task_ptr);
mov (rc edx) (c (edx_n Abi.task_field_gc_alloc_chain));
mark repeat_jmp_fix;
@ -896,13 +903,23 @@ let unwind_glue
(nabi:nabi)
(exit_task_fixup:fixup)
: unit =
crawl_stack_calling_glue e Abi.frame_glue_fns_field_drop;
let callee =
Abi.load_fixup_codeptr
e (h eax) exit_task_fixup false nabi.nabi_indirect
in
emit_c_call
e (rc eax) (h edx) (h ecx) nabi false callee [| (c task_ptr) |];
let emit = Il.emit e in
let mov dst src = emit (Il.umov dst src) in
let edx_n = word_n (Il.Hreg edx) in
mov (rc edx) (c task_ptr); (* switch back to rust stack *)
mov
(rc esp)
(c (edx_n Abi.task_field_rust_sp));
crawl_stack_calling_glue e Abi.frame_glue_fns_field_drop;
let callee =
Abi.load_fixup_codeptr
e (h eax) exit_task_fixup false nabi.nabi_indirect
in
emit_c_call
e (rc eax) (h edx) (h ecx) nabi false callee [| (c task_ptr) |];
;;