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put the error return addresses in the coro frame

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This commit is contained in:
Andrew Kelley
2018-04-08 16:04:21 -04:00
parent e4083b7391
commit ada441157f
5 changed files with 105 additions and 61 deletions
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33
src/codegen.cpp
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@@ -4383,10 +4383,7 @@ static LLVMValueRef ir_render_merge_err_ret_traces(CodeGen *g, IrExecutable *exe
{
assert(g->have_err_ret_tracing);
LLVMValueRef coro_promise_ptr = ir_llvm_value(g, instruction->coro_promise_ptr);
TypeStructField *field = instruction->resolved_field;
LLVMValueRef ptr_field_ptr = LLVMBuildStructGEP(g->builder, coro_promise_ptr, field->gen_index, "");
LLVMValueRef src_trace_ptr = LLVMBuildLoad(g->builder, ptr_field_ptr, "");
LLVMValueRef src_trace_ptr = ir_llvm_value(g, instruction->err_ret_trace_ptr);
LLVMValueRef dest_trace_ptr = get_cur_err_ret_trace_val(g, instruction->base.scope);
LLVMValueRef args[] = { dest_trace_ptr, src_trace_ptr };
@@ -4394,6 +4391,14 @@ static LLVMValueRef ir_render_merge_err_ret_traces(CodeGen *g, IrExecutable *exe
return nullptr;
}
static LLVMValueRef ir_render_mark_err_ret_trace_ptr(CodeGen *g, IrExecutable *executable,
IrInstructionMarkErrRetTracePtr *instruction)
{
assert(g->have_err_ret_tracing);
g->cur_err_ret_trace_val_stack = ir_llvm_value(g, instruction->err_ret_trace_ptr);
return nullptr;
}
static void set_debug_location(CodeGen *g, IrInstruction *instruction) {
AstNode *source_node = instruction->source_node;
Scope *scope = instruction->scope;
@@ -4613,6 +4618,8 @@ static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable,
return ir_render_save_err_ret_addr(g, executable, (IrInstructionSaveErrRetAddr *)instruction);
case IrInstructionIdMergeErrRetTraces:
return ir_render_merge_err_ret_traces(g, executable, (IrInstructionMergeErrRetTraces *)instruction);
case IrInstructionIdMarkErrRetTracePtr:
return ir_render_mark_err_ret_trace_ptr(g, executable, (IrInstructionMarkErrRetTracePtr *)instruction);
}
zig_unreachable();
}
@@ -5504,16 +5511,11 @@ static void do_code_gen(CodeGen *g) {
// error return tracing setup
bool is_async = fn_table_entry->type_entry->data.fn.fn_type_id.cc == CallingConventionAsync;
bool have_err_ret_trace_stack = g->have_err_ret_tracing && fn_table_entry->calls_or_awaits_errorable_fn &&
(is_async || !have_err_ret_trace_arg);
bool have_exactly_one_err_ret_value = !have_err_ret_trace_stack && g->have_err_ret_tracing && is_async &&
type_can_fail(fn_table_entry->type_entry->data.fn.fn_type_id.return_type);
bool have_err_ret_trace_stack = g->have_err_ret_tracing && fn_table_entry->calls_or_awaits_errorable_fn && !is_async && !have_err_ret_trace_arg;
LLVMValueRef err_ret_array_val = nullptr;
if (have_err_ret_trace_stack || have_exactly_one_err_ret_value) {
uint32_t ret_addr_count = have_exactly_one_err_ret_value ? 1 : stack_trace_ptr_count;
TypeTableEntry *array_type = get_array_type(g, g->builtin_types.entry_usize, ret_addr_count);
err_ret_array_val = build_alloca(g, array_type, "error_return_trace_addresses",
get_abi_alignment(g, array_type));
if (have_err_ret_trace_stack) {
TypeTableEntry *array_type = get_array_type(g, g->builtin_types.entry_usize, stack_trace_ptr_count);
err_ret_array_val = build_alloca(g, array_type, "error_return_trace_addresses", get_abi_alignment(g, array_type));
g->cur_err_ret_trace_val_stack = build_alloca(g, g->stack_trace_type, "error_return_trace", get_abi_alignment(g, g->stack_trace_type));
} else {
g->cur_err_ret_trace_val_stack = nullptr;
@@ -5610,8 +5612,7 @@ static void do_code_gen(CodeGen *g) {
}
// finishing error return trace setup. we have to do this after all the allocas.
if (have_err_ret_trace_stack || have_exactly_one_err_ret_value) {
uint32_t ret_addr_count = have_exactly_one_err_ret_value ? 1 : stack_trace_ptr_count;
if (have_err_ret_trace_stack) {
TypeTableEntry *usize = g->builtin_types.entry_usize;
size_t index_field_index = g->stack_trace_type->data.structure.fields[0].gen_index;
LLVMValueRef index_field_ptr = LLVMBuildStructGEP(g->builder, g->cur_err_ret_trace_val_stack, (unsigned)index_field_index, "");
@@ -5632,7 +5633,7 @@ static void do_code_gen(CodeGen *g) {
size_t len_field_index = slice_type->data.structure.fields[slice_len_index].gen_index;
LLVMValueRef len_field_ptr = LLVMBuildStructGEP(g->builder, addresses_field_ptr, (unsigned)len_field_index, "");
gen_store(g, LLVMConstInt(usize->type_ref, ret_addr_count, false), len_field_ptr, get_pointer_to_type(g, usize, false));
gen_store(g, LLVMConstInt(usize->type_ref, stack_trace_ptr_count, false), len_field_ptr, get_pointer_to_type(g, usize, false));
}
FnTypeId *fn_type_id = &fn_table_entry->type_entry->data.fn.fn_type_id;