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fix canceling async functions which have error return tracing

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This commit is contained in:
Andrew Kelley 2019-08-11 14:26:34 -04:00
parent 3f5c6d7a89
commit af8c6ccb4b
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GPG Key ID: 7C5F548F728501A9
2 changed files with 55 additions and 36 deletions
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17
src/codegen.cpp
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@ -2071,6 +2071,7 @@ static LLVMValueRef get_merge_err_ret_traces_fn_val(CodeGen *g) {
LLVMPositionBuilderAtEnd(g->builder, entry_block);
ZigLLVMClearCurrentDebugLocation(g->builder);
// if (dest_stack_trace == null) return;
// var frame_index: usize = undefined;
// var frames_left: usize = undefined;
// if (src_stack_trace.index < src_stack_trace.instruction_addresses.len) {
@ -2088,6 +2089,7 @@ static LLVMValueRef get_merge_err_ret_traces_fn_val(CodeGen *g) {
// frame_index = (frame_index + 1) % src_stack_trace.instruction_addresses.len;
// }
LLVMBasicBlockRef return_block = LLVMAppendBasicBlock(fn_val, "Return");
LLVMBasicBlockRef dest_non_null_block = LLVMAppendBasicBlock(fn_val, "DestNonNull");
LLVMValueRef frame_index_ptr = LLVMBuildAlloca(g->builder, g->builtin_types.entry_usize->llvm_type, "frame_index");
LLVMValueRef frames_left_ptr = LLVMBuildAlloca(g->builder, g->builtin_types.entry_usize->llvm_type, "frames_left");
@ -2095,6 +2097,11 @@ static LLVMValueRef get_merge_err_ret_traces_fn_val(CodeGen *g) {
LLVMValueRef dest_stack_trace_ptr = LLVMGetParam(fn_val, 0);
LLVMValueRef src_stack_trace_ptr = LLVMGetParam(fn_val, 1);
LLVMValueRef null_dest_bit = LLVMBuildICmp(g->builder, LLVMIntEQ, dest_stack_trace_ptr,
LLVMConstNull(LLVMTypeOf(dest_stack_trace_ptr)), "");
LLVMBuildCondBr(g->builder, null_dest_bit, return_block, dest_non_null_block);
LLVMPositionBuilderAtEnd(g->builder, dest_non_null_block);
size_t src_index_field_index = g->stack_trace_type->data.structure.fields[0].gen_index;
size_t src_addresses_field_index = g->stack_trace_type->data.structure.fields[1].gen_index;
LLVMValueRef src_index_field_ptr = LLVMBuildStructGEP(g->builder, src_stack_trace_ptr,
@ -5480,10 +5487,20 @@ static LLVMValueRef ir_render_cancel(CodeGen *g, IrExecutable *executable, IrIns
LLVMValueRef zero = LLVMConstNull(usize_type_ref);
LLVMValueRef all_ones = LLVMConstAllOnes(usize_type_ref);
LLVMValueRef one = LLVMConstInt(usize_type_ref, 1, false);
src_assert(instruction->frame->value.type->id == ZigTypeIdAnyFrame, instruction->base.source_node);
ZigType *result_type = instruction->frame->value.type->data.any_frame.result_type;
LLVMValueRef target_frame_ptr = ir_llvm_value(g, instruction->frame);
LLVMBasicBlockRef resume_bb = gen_suspend_begin(g, "CancelResume");
// supply null for the error return trace pointer
if (codegen_fn_has_err_ret_tracing_arg(g, result_type)) {
LLVMValueRef err_ret_trace_ptr_ptr = LLVMBuildStructGEP(g->builder, target_frame_ptr,
frame_index_trace_arg(g, result_type), "");
LLVMBuildStore(g->builder, LLVMConstNull(LLVMGetElementType(LLVMTypeOf(err_ret_trace_ptr_ptr))),
err_ret_trace_ptr_ptr);
}
LLVMValueRef awaiter_val = LLVMBuildPtrToInt(g->builder, g->cur_frame_ptr, usize_type_ref, "");
LLVMValueRef awaiter_ored_val = LLVMBuildOr(g->builder, awaiter_val, one, "");
LLVMValueRef awaiter_ptr = LLVMBuildStructGEP(g->builder, target_frame_ptr, coro_awaiter_index, "");

74
src/ir.cpp
View File

@ -24656,38 +24656,9 @@ static IrInstruction *ir_analyze_instruction_suspend_finish(IrAnalyze *ira,
return ir_build_suspend_finish(&ira->new_irb, instruction->base.scope, instruction->base.source_node, begin);
}
static IrInstruction *ir_analyze_instruction_cancel(IrAnalyze *ira, IrInstructionCancel *instruction) {
IrInstruction *frame_ptr = instruction->frame->child;
if (type_is_invalid(frame_ptr->value.type))
return ira->codegen->invalid_instruction;
IrInstruction *frame;
if (frame_ptr->value.type->id == ZigTypeIdPointer &&
frame_ptr->value.type->data.pointer.ptr_len == PtrLenSingle &&
frame_ptr->value.type->data.pointer.child_type->id == ZigTypeIdCoroFrame)
{
frame = frame_ptr;
} else {
frame = ir_get_deref(ira, &instruction->base, frame_ptr, nullptr);
}
ZigType *any_frame_type = get_any_frame_type(ira->codegen, nullptr);
IrInstruction *casted_frame = ir_implicit_cast(ira, frame, any_frame_type);
if (type_is_invalid(casted_frame->value.type))
return ira->codegen->invalid_instruction;
ZigFn *fn_entry = exec_fn_entry(ira->new_irb.exec);
ir_assert(fn_entry != nullptr, &instruction->base);
if (fn_entry->inferred_async_node == nullptr) {
fn_entry->inferred_async_node = instruction->base.source_node;
}
return ir_build_cancel(&ira->new_irb, instruction->base.scope, instruction->base.source_node, casted_frame);
}
static IrInstruction *ir_analyze_instruction_await(IrAnalyze *ira, IrInstructionAwaitSrc *instruction) {
IrInstruction *frame_ptr = instruction->frame->child;
static IrInstruction *analyze_frame_ptr_to_anyframe_T(IrAnalyze *ira, IrInstruction *source_instr,
IrInstruction *frame_ptr)
{
if (type_is_invalid(frame_ptr->value.type))
return ira->codegen->invalid_instruction;
@ -24700,15 +24671,21 @@ static IrInstruction *ir_analyze_instruction_await(IrAnalyze *ira, IrInstruction
result_type = frame_ptr->value.type->data.pointer.child_type->data.frame.fn->type_entry->data.fn.fn_type_id.return_type;
frame = frame_ptr;
} else {
frame = ir_get_deref(ira, &instruction->base, frame_ptr, nullptr);
if (frame->value.type->id != ZigTypeIdAnyFrame ||
frame = ir_get_deref(ira, source_instr, frame_ptr, nullptr);
if (frame->value.type->id == ZigTypeIdPointer &&
frame->value.type->data.pointer.ptr_len == PtrLenSingle &&
frame->value.type->data.pointer.child_type->id == ZigTypeIdCoroFrame)
{
result_type = frame->value.type->data.pointer.child_type->data.frame.fn->type_entry->data.fn.fn_type_id.return_type;
} else if (frame->value.type->id != ZigTypeIdAnyFrame ||
frame->value.type->data.any_frame.result_type == nullptr)
{
ir_add_error(ira, &instruction->base,
ir_add_error(ira, source_instr,
buf_sprintf("expected anyframe->T, found '%s'", buf_ptr(&frame->value.type->name)));
return ira->codegen->invalid_instruction;
} else {
result_type = frame->value.type->data.any_frame.result_type;
}
result_type = frame->value.type->data.any_frame.result_type;
}
ZigType *any_frame_type = get_any_frame_type(ira->codegen, result_type);
@ -24716,6 +24693,31 @@ static IrInstruction *ir_analyze_instruction_await(IrAnalyze *ira, IrInstruction
if (type_is_invalid(casted_frame->value.type))
return ira->codegen->invalid_instruction;
return casted_frame;
}
static IrInstruction *ir_analyze_instruction_cancel(IrAnalyze *ira, IrInstructionCancel *instruction) {
IrInstruction *frame = analyze_frame_ptr_to_anyframe_T(ira, &instruction->base, instruction->frame->child);
if (type_is_invalid(frame->value.type))
return ira->codegen->invalid_instruction;
ZigFn *fn_entry = exec_fn_entry(ira->new_irb.exec);
ir_assert(fn_entry != nullptr, &instruction->base);
if (fn_entry->inferred_async_node == nullptr) {
fn_entry->inferred_async_node = instruction->base.source_node;
}
return ir_build_cancel(&ira->new_irb, instruction->base.scope, instruction->base.source_node, frame);
}
static IrInstruction *ir_analyze_instruction_await(IrAnalyze *ira, IrInstructionAwaitSrc *instruction) {
IrInstruction *frame = analyze_frame_ptr_to_anyframe_T(ira, &instruction->base, instruction->frame->child);
if (type_is_invalid(frame->value.type))
return ira->codegen->invalid_instruction;
ZigType *result_type = frame->value.type->data.any_frame.result_type;
ZigFn *fn_entry = exec_fn_entry(ira->new_irb.exec);
ir_assert(fn_entry != nullptr, &instruction->base);