The Tor Browser: xpcom/analysis/static-init.js@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 /**

     6  * Detects static initializers i.e. functions called during static initialization.

     7  */

     9 require({ after_gcc_pass: "cfg" });

    11 function process_tree(fn) {

    12   for each (let attr in translate_attributes(DECL_ATTRIBUTES(fn)))

    13     if (attr.name == "constructor")

    14       warning(pretty_func(fn) + " marked with constructor attribute\n");

    16   if (decl_name_string(fn) != "__static_initialization_and_destruction_0")

    17     return;

    19   let cfg = function_decl_cfg(fn);

    20   for (let isn in cfg_isn_iterator(cfg)) {

    21     if (isn.tree_code() != GIMPLE_CALL)

    22       continue;

    23     let decl = gimple_call_fndecl(isn);

    24     let lhs = gimple_call_lhs(isn);

    25     if (lhs) {

    26       warning(pretty_var(lhs) + " defined by call to " + pretty_func(decl) +

    27               " during static initialization", location_of(lhs));

    28     } else {

    29       let arg = constructorArg(isn);

    30       if (arg)

    31         warning(pretty_var(arg) + " defined by call to constructor " + pretty_func(decl) +

    32                 " during static initialization", location_of(arg));

    33       else

    34         warning(pretty_func(decl) + " called during static initialization", location_of(decl));

    35     }

    36   }

    37 }

    39 function constructorArg(call) {

    40   let decl = gimple_call_fndecl(call);

    42   if (!DECL_CONSTRUCTOR_P(decl))

    43     return null;

    45   let arg = gimple_call_arg_iterator(call).next();

    46   if (TYPE_MAIN_VARIANT(TREE_TYPE(TREE_TYPE(arg))) != DECL_CONTEXT(decl))

    47     throw new Error("malformed constructor call?!");

    49   return arg.tree_code() == ADDR_EXPR ? TREE_OPERAND(arg, 0) : arg;

    50 }

    52 function pretty_func(fn) {

    53   return rfunc_string(rectify_function_decl(fn));

    54 }

    56 function pretty_var(v) {

    57   return type_string(TREE_TYPE(v)) + " " + expr_display(v);

    58 }

The Tor Browser / file revision