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src: refactor node options parsers to mitigate MSVC bug
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PR-URL: #26280
Fixes: #25593
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
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@refack @BridgeAR
refack authored and BridgeAR committed Mar 4, 2019
1 parent 2908e63 commit 64a0b11
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Showing 4 changed files with 83 additions and 65 deletions.
2 changes: 1 addition & 1 deletion src/node.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -546,7 +546,7 @@ int ProcessGlobalArgs(std::vector<std::string>* args,
std::vector<std::string> v8_args;

Mutex::ScopedLock lock(per_process::cli_options_mutex);
options_parser::PerProcessOptionsParser::instance.Parse(
options_parser::Parse(
args,
exec_args,
&v8_args,
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99 changes: 69 additions & 30 deletions src/node_options.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -102,19 +102,60 @@ void EnvironmentOptions::CheckOptions(std::vector<std::string>* errors) {

namespace options_parser {

// Explicitly access the singelton instances in their dependancy order.
// This was moved here to workaround a compiler bug.
// Refs: https://github.com/nodejs/node/issues/25593
class DebugOptionsParser : public OptionsParser<DebugOptions> {
public:
DebugOptionsParser();
};

class EnvironmentOptionsParser : public OptionsParser<EnvironmentOptions> {
public:
EnvironmentOptionsParser();
explicit EnvironmentOptionsParser(const DebugOptionsParser& dop)
: EnvironmentOptionsParser() {
Insert(&dop, &EnvironmentOptions::get_debug_options);
}
};

#if HAVE_INSPECTOR
const DebugOptionsParser DebugOptionsParser::instance;
#endif // HAVE_INSPECTOR
class PerIsolateOptionsParser : public OptionsParser<PerIsolateOptions> {
public:
PerIsolateOptionsParser() = delete;
explicit PerIsolateOptionsParser(const EnvironmentOptionsParser& eop);
};

const EnvironmentOptionsParser EnvironmentOptionsParser::instance;
class PerProcessOptionsParser : public OptionsParser<PerProcessOptions> {
public:
PerProcessOptionsParser() = delete;
explicit PerProcessOptionsParser(const PerIsolateOptionsParser& iop);
};

const PerIsolateOptionsParser PerIsolateOptionsParser::instance;
#if HAVE_INSPECTOR
const DebugOptionsParser _dop_instance{};
const EnvironmentOptionsParser _eop_instance{_dop_instance};
#else
const EnvironmentOptionsParser _eop_instance{};
#endif // HAVE_INSPECTOR
const PerIsolateOptionsParser _piop_instance{_eop_instance};
const PerProcessOptionsParser _ppop_instance{_piop_instance};

template <>
void Parse(
StringVector* const args, StringVector* const exec_args,
StringVector* const v8_args,
PerIsolateOptions* const options,
OptionEnvvarSettings required_env_settings, StringVector* const errors) {
_piop_instance.Parse(
args, exec_args, v8_args, options, required_env_settings, errors);
}

const PerProcessOptionsParser PerProcessOptionsParser::instance;
template <>
void Parse(
StringVector* const args, StringVector* const exec_args,
StringVector* const v8_args,
PerProcessOptions* const options,
OptionEnvvarSettings required_env_settings, StringVector* const errors) {
_ppop_instance.Parse(
args, exec_args, v8_args, options, required_env_settings, errors);
}

// XXX: If you add an option here, please also add it to doc/node.1 and
// doc/api/cli.md
Expand Down Expand Up @@ -273,14 +314,10 @@ EnvironmentOptionsParser::EnvironmentOptionsParser() {
AddAlias("-i", "--interactive");

AddOption("--napi-modules", "", NoOp{}, kAllowedInEnvironment);

#if HAVE_INSPECTOR
Insert(&DebugOptionsParser::instance,
&EnvironmentOptions::get_debug_options);
#endif // HAVE_INSPECTOR
}

PerIsolateOptionsParser::PerIsolateOptionsParser() {
PerIsolateOptionsParser::PerIsolateOptionsParser(
const EnvironmentOptionsParser& eop) {
AddOption("--track-heap-objects",
"track heap object allocations for heap snapshots",
&PerIsolateOptions::track_heap_objects,
Expand Down Expand Up @@ -336,11 +373,11 @@ PerIsolateOptionsParser::PerIsolateOptionsParser() {
kAllowedInEnvironment);
#endif // NODE_REPORT

Insert(&EnvironmentOptionsParser::instance,
&PerIsolateOptions::get_per_env_options);
Insert(&eop, &PerIsolateOptions::get_per_env_options);
}

PerProcessOptionsParser::PerProcessOptionsParser() {
PerProcessOptionsParser::PerProcessOptionsParser(
const PerIsolateOptionsParser& iop) {
AddOption("--title",
"the process title to use on startup",
&PerProcessOptions::title,
Expand Down Expand Up @@ -446,8 +483,7 @@ PerProcessOptionsParser::PerProcessOptionsParser() {
#endif
#endif

Insert(&PerIsolateOptionsParser::instance,
&PerProcessOptions::get_per_isolate_options);
Insert(&iop, &PerProcessOptions::get_per_isolate_options);
}

inline std::string RemoveBrackets(const std::string& host) {
Expand Down Expand Up @@ -513,10 +549,8 @@ void GetOptions(const FunctionCallbackInfo<Value>& args) {
per_process::cli_options->per_isolate = original_per_isolate;
});

const auto& parser = PerProcessOptionsParser::instance;

Local<Map> options = Map::New(isolate);
for (const auto& item : parser.options_) {
for (const auto& item : _ppop_instance.options_) {
Local<Value> value;
const auto& option_info = item.second;
auto field = option_info.field;
Expand All @@ -534,29 +568,34 @@ void GetOptions(const FunctionCallbackInfo<Value>& args) {
}
break;
case kBoolean:
value = Boolean::New(isolate, *parser.Lookup<bool>(field, opts));
value = Boolean::New(isolate,
*_ppop_instance.Lookup<bool>(field, opts));
break;
case kInteger:
value = Number::New(isolate, *parser.Lookup<int64_t>(field, opts));
value = Number::New(isolate,
*_ppop_instance.Lookup<int64_t>(field, opts));
break;
case kUInteger:
value = Number::New(isolate, *parser.Lookup<uint64_t>(field, opts));
value = Number::New(isolate,
*_ppop_instance.Lookup<uint64_t>(field, opts));
break;
case kString:
if (!ToV8Value(context, *parser.Lookup<std::string>(field, opts))
if (!ToV8Value(context,
*_ppop_instance.Lookup<std::string>(field, opts))
.ToLocal(&value)) {
return;
}
break;
case kStringList:
if (!ToV8Value(context,
*parser.Lookup<std::vector<std::string>>(field, opts))
*_ppop_instance.Lookup<StringVector>(field, opts))
.ToLocal(&value)) {
return;
}
break;
case kHostPort: {
const HostPort& host_port = *parser.Lookup<HostPort>(field, opts);
const HostPort& host_port =
*_ppop_instance.Lookup<HostPort>(field, opts);
Local<Object> obj = Object::New(isolate);
Local<Value> host;
if (!ToV8Value(context, host_port.host()).ToLocal(&host) ||
Expand Down Expand Up @@ -597,7 +636,7 @@ void GetOptions(const FunctionCallbackInfo<Value>& args) {
}

Local<Value> aliases;
if (!ToV8Value(context, parser.aliases_).ToLocal(&aliases)) return;
if (!ToV8Value(context, _ppop_instance.aliases_).ToLocal(&aliases)) return;

Local<Object> ret = Object::New(isolate);
if (ret->Set(context, env->options_string(), options).IsNothing() ||
Expand Down
45 changes: 12 additions & 33 deletions src/node_options.h
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Original file line number Diff line number Diff line change
Expand Up @@ -320,12 +320,12 @@ class OptionsParser {
//
// If `*error` is set, the result of the parsing should be discarded and the
// contents of any of the argument vectors should be considered undefined.
virtual void Parse(std::vector<std::string>* const args,
std::vector<std::string>* const exec_args,
std::vector<std::string>* const v8_args,
Options* const options,
OptionEnvvarSettings required_env_settings,
std::vector<std::string>* const errors) const;
void Parse(std::vector<std::string>* const args,
std::vector<std::string>* const exec_args,
std::vector<std::string>* const v8_args,
Options* const options,
OptionEnvvarSettings required_env_settings,
std::vector<std::string>* const errors) const;

private:
// We support the wide variety of different option types by remembering
Expand Down Expand Up @@ -406,33 +406,12 @@ class OptionsParser {
friend void GetOptions(const v8::FunctionCallbackInfo<v8::Value>& args);
};

class DebugOptionsParser : public OptionsParser<DebugOptions> {
public:
DebugOptionsParser();

static const DebugOptionsParser instance;
};

class EnvironmentOptionsParser : public OptionsParser<EnvironmentOptions> {
public:
EnvironmentOptionsParser();

static const EnvironmentOptionsParser instance;
};

class PerIsolateOptionsParser : public OptionsParser<PerIsolateOptions> {
public:
PerIsolateOptionsParser();

static const PerIsolateOptionsParser instance;
};

class PerProcessOptionsParser : public OptionsParser<PerProcessOptions> {
public:
PerProcessOptionsParser();

static const PerProcessOptionsParser instance;
};
using StringVector = std::vector<std::string>;
template <class OptionsType, class = Options>
void Parse(
StringVector* const args, StringVector* const exec_args,
StringVector* const v8_args, OptionsType* const options,
OptionEnvvarSettings required_env_settings, StringVector* const errors);

} // namespace options_parser

Expand Down
2 changes: 1 addition & 1 deletion src/node_worker.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -476,7 +476,7 @@ void Worker::New(const FunctionCallbackInfo<Value>& args) {

// Using invalid_args as the v8_args argument as it stores unknown
// options for the per isolate parser.
options_parser::PerIsolateOptionsParser::instance.Parse(
options_parser::Parse(
&exec_argv,
&exec_argv_out,
&invalid_args,
Expand Down

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