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do not handle return parameter value since it's unaccessible in stack

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trace (no functions returns)
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nnosov
2020-01-14 19:28:38 +04:00
parent e2bdd31cef
commit a60045d9f4
1 changed files with 1 additions and 9 deletions
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framework/sysutils.cpp
+1 -9
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@@ -156,6 +156,7 @@ bool __pst_parameter::handle_type(Dwarf_Attribute* param)
} }
ctx->log(SEVERITY_DEBUG, "base type '%s'(%lu)", dwarf_diename(&ret_die), size); ctx->log(SEVERITY_DEBUG, "base type '%s'(%lu)", dwarf_diename(&ret_die), size);
add_type(dwarf_diename(&ret_die), DW_TAG_base_type); add_type(dwarf_diename(&ret_die), DW_TAG_base_type);
type = DW_TAG_base_type;
break; break;
} }
case DW_TAG_array_type: case DW_TAG_array_type:
@@ -382,11 +383,9 @@ bool __pst_function::print_dwarf()
ctx->print("%s:%u: ", file.c_str(), line); ctx->print("%s:%u: ", file.c_str(), line);
bool first = true; bool start_variable = false; bool first = true; bool start_variable = false;
pst_parameter* ret = NULL;
for(pst_parameter* param = next_param(NULL); param; param = next_param(param)) { for(pst_parameter* param = next_param(NULL); param; param = next_param(param)) {
if(param->is_return) { if(param->is_return) {
// print return value type, function name and start list of parameters // print return value type, function name and start list of parameters
ret = param;
param->print_dwarf(); param->print_dwarf();
ctx->print(" %s(", name.c_str()); ctx->print(" %s(", name.c_str());
continue; continue;
@@ -479,19 +478,12 @@ bool __pst_function::handle_dwarf(Dwarf_Die* d)
pst_parameter* ret_p = add_param(); ret_p->is_return = true; pst_parameter* ret_p = add_param(); ret_p->is_return = true;
attr = dwarf_attr(die, DW_AT_type, &attr_mem); attr = dwarf_attr(die, DW_AT_type, &attr_mem);
if(attr) { if(attr) {
ctx->log(SEVERITY_DEBUG, "Handle return parameter");
if(!unw_get_reg(&ctx->cursor, 16, &ret_p->value)) {
ret_p->has_value = true;
} else {
ctx->log(SEVERITY_ERROR, "Failed to get return parameter value from RIP");
}
if(!ret_p->handle_type(attr)) { if(!ret_p->handle_type(attr)) {
ctx->log(SEVERITY_ERROR, "Failed to handle return parameter type"); ctx->log(SEVERITY_ERROR, "Failed to handle return parameter type");
del_param(ret_p); del_param(ret_p);
} }
} else { } else {
ret_p->add_type("void", 0); ret_p->add_type("void", 0);
ctx->log(SEVERITY_DEBUG, "return attr name = 'void(0)'");
} }
Dwarf_Die result; Dwarf_Die result;