gecko/xpcom/analysis/static-init.js

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/**
* Detects static initializers i.e. functions called during static initialization.
*/
require({ after_gcc_pass: "cfg" });
function process_tree(fn) {
for each (let attr in translate_attributes(DECL_ATTRIBUTES(fn)))
if (attr.name == "constructor")
warning(pretty_func(fn) + " marked with constructor attribute\n");
if (decl_name_string(fn) != "__static_initialization_and_destruction_0")
return;
let cfg = function_decl_cfg(fn);
for (let isn in cfg_isn_iterator(cfg)) {
if (isn.tree_code() != GIMPLE_CALL)
continue;
let decl = gimple_call_fndecl(isn);
let lhs = gimple_call_lhs(isn);
if (lhs) {
warning(pretty_var(lhs) + " defined by call to " + pretty_func(decl) +
" during static initialization", location_of(lhs));
} else {
let arg = constructorArg(isn);
if (arg)
warning(pretty_var(arg) + " defined by call to constructor " + pretty_func(decl) +
" during static initialization", location_of(arg));
else
warning(pretty_func(decl) + " called during static initialization", location_of(decl));
}
}
}
function constructorArg(call) {
let decl = gimple_call_fndecl(call);
if (!DECL_CONSTRUCTOR_P(decl))
return null;
let arg = gimple_call_arg_iterator(call).next();
if (TYPE_MAIN_VARIANT(TREE_TYPE(TREE_TYPE(arg))) != DECL_CONTEXT(decl))
throw new Error("malformed constructor call?!");
return arg.tree_code() == ADDR_EXPR ? TREE_OPERAND(arg, 0) : arg;
}
function pretty_func(fn) {
return rfunc_string(rectify_function_decl(fn));
}
function pretty_var(v) {
return type_string(TREE_TYPE(v)) + " " + expr_display(v);
}