80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
namespace factor {
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inline static cell callstack_object_size(cell size) {
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return sizeof(callstack) + size;
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}
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/* This is a little tricky. The iterator may allocate memory, so we
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keep the callstack in a GC root and use relative offsets */
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/* Allocates memory */
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template <typename Iterator, typename Fixup>
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inline void factor_vm::iterate_callstack_object(callstack* stack_,
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Iterator& iterator,
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Fixup& fixup) {
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data_root<callstack> stack(stack_, this);
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fixnum frame_length = factor::untag_fixnum(stack->length);
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fixnum frame_offset = 0;
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while (frame_offset < frame_length) {
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void* frame_top = stack->frame_top_at(frame_offset);
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void* addr = frame_return_address(frame_top);
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void* fixed_addr = Fixup::translated_code_block_map
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? (void*)fixup.translate_code((code_block*)addr)
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: addr;
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code_block* owner = code->code_block_for_address((cell)fixed_addr);
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cell frame_size = owner->stack_frame_size_for_address((cell)fixed_addr);
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iterator(frame_top, frame_size, owner, fixed_addr);
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frame_offset += frame_size;
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}
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}
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/* Allocates memory */
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template <typename Iterator>
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inline void factor_vm::iterate_callstack_object(callstack* stack,
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Iterator& iterator) {
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no_fixup none;
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iterate_callstack_object(stack, iterator, none);
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}
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/* Allocates memory */
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template <typename Iterator, typename Fixup>
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inline void factor_vm::iterate_callstack(context* ctx, Iterator& iterator,
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Fixup& fixup) {
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if (ctx->callstack_top == ctx->callstack_bottom)
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return;
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char* frame_top = (char*)ctx->callstack_top;
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while (frame_top < (char*)ctx->callstack_bottom) {
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void* addr = frame_return_address((void*)frame_top);
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FACTOR_ASSERT(addr != 0);
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void* fixed_addr = Fixup::translated_code_block_map
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? (void*)fixup.translate_code((code_block*)addr)
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: addr;
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code_block* owner = code->code_block_for_address((cell)fixed_addr);
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code_block* fixed_owner =
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Fixup::translated_code_block_map ? owner : fixup.translate_code(owner);
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cell frame_size =
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fixed_owner->stack_frame_size_for_address((cell)fixed_addr);
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void* fixed_addr_for_iter =
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Fixup::translated_code_block_map ? fixed_addr : addr;
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iterator(frame_top, frame_size, owner, fixed_addr_for_iter);
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frame_top += frame_size;
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}
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}
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/* Allocates memory */
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template <typename Iterator>
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inline void factor_vm::iterate_callstack(context* ctx, Iterator& iterator) {
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no_fixup none;
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iterate_callstack(ctx, iterator, none);
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}
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}
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