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https://github.com/dart-lang/sdk
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![Ryan Macnak](/assets/img/avatar_default.png)
This is true everywhere by default. It can only be false when isolate groups are disabled, and the ability to disable isolate groups will be removed. TEST=ci Change-Id: I8ce12883a6128a6c6c1883605b5e3889952ce76c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/217153 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com> Reviewed-by: Slava Egorov <vegorov@google.com>
559 lines
16 KiB
C++
559 lines
16 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/flags.h"
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#include "platform/assert.h"
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#include "vm/isolate.h"
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#include "vm/json_stream.h"
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#include "vm/os.h"
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namespace dart {
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DEFINE_FLAG(bool, print_flags, false, "Print flags as they are being parsed.");
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DEFINE_FLAG(bool,
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ignore_unrecognized_flags,
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false,
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"Ignore unrecognized flags.");
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#define PRODUCT_FLAG_MACRO(name, type, default_value, comment) \
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type FLAG_##name = \
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Flags::Register_##type(&FLAG_##name, #name, default_value, comment);
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#if defined(DEBUG)
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#define DEBUG_FLAG_MACRO(name, type, default_value, comment) \
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type FLAG_##name = \
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Flags::Register_##type(&FLAG_##name, #name, default_value, comment);
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#else // defined(DEBUG)
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#define DEBUG_FLAG_MACRO(name, type, default_value, comment)
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#endif // defined(DEBUG)
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#if defined(PRODUCT) && defined(DART_PRECOMPILED_RUNTIME)
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// Nothing to be done for the product flag definitions.
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#define RELEASE_FLAG_MACRO(name, product_value, type, default_value, comment)
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// Nothing to be done for the precompilation flag definitions.
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#define PRECOMPILE_FLAG_MACRO(name, pre_value, product_value, type, \
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default_value, comment)
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#elif defined(PRODUCT) // !PRECOMPILED
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// Nothing to be done for the product flag definitions.
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#define RELEASE_FLAG_MACRO(name, product_value, type, default_value, comment)
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// Nothing to be done for the precompilation flag definitions.
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#define PRECOMPILE_FLAG_MACRO(name, pre_value, product_value, type, \
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default_value, comment)
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#elif defined(DART_PRECOMPILED_RUNTIME) // !PRODUCT
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#define RELEASE_FLAG_MACRO(name, product_value, type, default_value, comment) \
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type FLAG_##name = \
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Flags::Register_##type(&FLAG_##name, #name, default_value, comment);
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// Nothing to be done for the precompilation flag definitions.
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#define PRECOMPILE_FLAG_MACRO(name, pre_value, product_value, type, \
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default_value, comment)
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#else // !PRODUCT && !PRECOMPILED
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#define RELEASE_FLAG_MACRO(name, product_value, type, default_value, comment) \
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type FLAG_##name = \
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Flags::Register_##type(&FLAG_##name, #name, default_value, comment);
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#define PRECOMPILE_FLAG_MACRO(name, pre_value, product_value, type, \
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default_value, comment) \
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type FLAG_##name = \
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Flags::Register_##type(&FLAG_##name, #name, default_value, comment);
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#endif
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// Define all of the non-product flags here.
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FLAG_LIST(PRODUCT_FLAG_MACRO,
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RELEASE_FLAG_MACRO,
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PRECOMPILE_FLAG_MACRO,
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DEBUG_FLAG_MACRO)
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#undef PRODUCT_FLAG_MACRO
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#undef RELEASE_FLAG_MACRO
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#undef PRECOMPILE_FLAG_MACRO
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#undef DEBUG_FLAG_MACRO
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bool Flags::initialized_ = false;
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// List of registered flags.
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Flag** Flags::flags_ = NULL;
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intptr_t Flags::capacity_ = 0;
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intptr_t Flags::num_flags_ = 0;
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class Flag {
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public:
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enum FlagType {
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kBoolean,
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kInteger,
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kUint64,
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kString,
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kFlagHandler,
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kOptionHandler,
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kNumFlagTypes
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};
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Flag(const char* name, const char* comment, void* addr, FlagType type)
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: name_(name), comment_(comment), addr_(addr), type_(type) {}
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Flag(const char* name, const char* comment, FlagHandler handler)
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: name_(name),
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comment_(comment),
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string_value_("false"),
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flag_handler_(handler),
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type_(kFlagHandler) {}
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Flag(const char* name, const char* comment, OptionHandler handler)
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: name_(name),
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comment_(comment),
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string_value_(nullptr),
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option_handler_(handler),
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type_(kOptionHandler) {}
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void Print() {
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if (IsUnrecognized()) {
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OS::PrintErr("%s: unrecognized\n", name_);
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return;
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}
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switch (type_) {
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case kBoolean: {
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OS::Print("%s: %s (%s)\n", name_, *this->bool_ptr_ ? "true" : "false",
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comment_);
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break;
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}
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case kInteger: {
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OS::Print("%s: %d (%s)\n", name_, *this->int_ptr_, comment_);
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break;
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}
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case kUint64: {
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OS::Print("%s: %" Pu64 " (%s)\n", name_, *this->uint64_ptr_, comment_);
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break;
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}
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case kString: {
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if (*this->charp_ptr_ != NULL) {
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OS::Print("%s: '%s' (%s)\n", name_, *this->charp_ptr_, comment_);
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} else {
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OS::Print("%s: (null) (%s)\n", name_, comment_);
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}
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break;
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}
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case kOptionHandler:
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case kFlagHandler: {
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OS::Print("%s: (%s)\n", name_, comment_);
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break;
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}
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default:
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UNREACHABLE();
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break;
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}
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}
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bool IsUnrecognized() const {
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return (type_ == kBoolean) && (bool_ptr_ == NULL);
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}
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const char* name_;
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const char* comment_;
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const char* string_value_;
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union {
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void* addr_;
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bool* bool_ptr_;
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int* int_ptr_;
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uint64_t* uint64_ptr_;
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charp* charp_ptr_;
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FlagHandler flag_handler_;
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OptionHandler option_handler_;
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};
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FlagType type_;
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bool changed_ = false;
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};
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Flag* Flags::Lookup(const char* name) {
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for (intptr_t i = 0; i < num_flags_; i++) {
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Flag* flag = flags_[i];
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if (strcmp(flag->name_, name) == 0) {
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return flag;
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}
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}
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return NULL;
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}
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bool Flags::IsSet(const char* name) {
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Flag* flag = Lookup(name);
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return (flag != NULL) && (flag->type_ == Flag::kBoolean) &&
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(flag->bool_ptr_ != NULL) && (*flag->bool_ptr_ == true);
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}
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void Flags::Cleanup() {
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ASSERT(initialized_);
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initialized_ = false;
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}
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void Flags::AddFlag(Flag* flag) {
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ASSERT(!initialized_);
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if (num_flags_ == capacity_) {
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if (flags_ == NULL) {
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capacity_ = 256;
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flags_ = new Flag*[capacity_];
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} else {
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intptr_t new_capacity = capacity_ * 2;
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Flag** new_flags = new Flag*[new_capacity];
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for (intptr_t i = 0; i < num_flags_; i++) {
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new_flags[i] = flags_[i];
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}
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delete[] flags_;
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flags_ = new_flags;
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capacity_ = new_capacity;
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}
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}
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flags_[num_flags_++] = flag;
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}
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bool Flags::Register_bool(bool* addr,
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const char* name,
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bool default_value,
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const char* comment) {
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Flag* flag = Lookup(name);
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if (flag != NULL) {
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ASSERT(flag->IsUnrecognized());
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return default_value;
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}
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flag = new Flag(name, comment, addr, Flag::kBoolean);
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AddFlag(flag);
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return default_value;
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}
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int Flags::Register_int(int* addr,
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const char* name,
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int default_value,
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const char* comment) {
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ASSERT(Lookup(name) == NULL);
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Flag* flag = new Flag(name, comment, addr, Flag::kInteger);
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AddFlag(flag);
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return default_value;
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}
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uint64_t Flags::Register_uint64_t(uint64_t* addr,
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const char* name,
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uint64_t default_value,
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const char* comment) {
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ASSERT(Lookup(name) == NULL);
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Flag* flag = new Flag(name, comment, addr, Flag::kUint64);
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AddFlag(flag);
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return default_value;
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}
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const char* Flags::Register_charp(charp* addr,
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const char* name,
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const char* default_value,
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const char* comment) {
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ASSERT(Lookup(name) == NULL);
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Flag* flag = new Flag(name, comment, addr, Flag::kString);
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AddFlag(flag);
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return default_value;
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}
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bool Flags::RegisterFlagHandler(FlagHandler handler,
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const char* name,
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const char* comment) {
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ASSERT(Lookup(name) == NULL);
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Flag* flag = new Flag(name, comment, handler);
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AddFlag(flag);
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return false;
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}
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bool Flags::RegisterOptionHandler(OptionHandler handler,
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const char* name,
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const char* comment) {
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ASSERT(Lookup(name) == NULL);
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Flag* flag = new Flag(name, comment, handler);
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AddFlag(flag);
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return false;
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}
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static void Normalize(char* s) {
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intptr_t len = strlen(s);
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for (intptr_t i = 0; i < len; i++) {
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if (s[i] == '-') {
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s[i] = '_';
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}
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}
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}
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bool Flags::SetFlagFromString(Flag* flag, const char* argument) {
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ASSERT(!flag->IsUnrecognized());
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switch (flag->type_) {
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case Flag::kBoolean: {
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if (strcmp(argument, "true") == 0) {
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*flag->bool_ptr_ = true;
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} else if (strcmp(argument, "false") == 0) {
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*flag->bool_ptr_ = false;
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} else {
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return false;
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}
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break;
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}
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case Flag::kString: {
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*flag->charp_ptr_ = argument == NULL ? NULL : Utils::StrDup(argument);
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break;
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}
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case Flag::kInteger: {
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char* endptr = NULL;
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const intptr_t len = strlen(argument);
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int base = 10;
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if ((len > 2) && (argument[0] == '0') && (argument[1] == 'x')) {
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base = 16;
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}
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int val = strtol(argument, &endptr, base);
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if (endptr == argument + len) {
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*flag->int_ptr_ = val;
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} else {
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return false;
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}
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break;
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}
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case Flag::kUint64: {
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char* endptr = NULL;
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const intptr_t len = strlen(argument);
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int base = 10;
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if ((len > 2) && (argument[0] == '0') && (argument[1] == 'x')) {
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base = 16;
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}
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int64_t val = strtoll(argument, &endptr, base);
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if (endptr == argument + len) {
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*flag->uint64_ptr_ = static_cast<uint64_t>(val);
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} else {
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return false;
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}
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break;
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}
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case Flag::kFlagHandler: {
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if (strcmp(argument, "true") == 0) {
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(flag->flag_handler_)(true);
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} else if (strcmp(argument, "false") == 0) {
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(flag->flag_handler_)(false);
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} else {
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return false;
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}
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flag->string_value_ = argument;
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break;
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}
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case Flag::kOptionHandler: {
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flag->string_value_ = argument;
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(flag->option_handler_)(argument);
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break;
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}
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default: {
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UNREACHABLE();
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return false;
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}
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}
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flag->changed_ = true;
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return true;
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}
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void Flags::Parse(const char* option) {
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// Find the beginning of the option argument, if it exists.
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const char* equals = option;
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while ((*equals != '\0') && (*equals != '=')) {
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equals++;
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}
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const char* argument = NULL;
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// Determine if this is an option argument.
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if (*equals != '=') {
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// No explicit option argument. Determine if there is a "no_" prefix
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// preceding the name.
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const char* const kNo1Prefix = "no_";
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const char* const kNo2Prefix = "no-";
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const intptr_t kNo1PrefixLen = strlen(kNo1Prefix);
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const intptr_t kNo2PrefixLen = strlen(kNo2Prefix);
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if (strncmp(option, kNo1Prefix, kNo1PrefixLen) == 0) {
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option += kNo1PrefixLen; // Skip the "no_" when looking up the name.
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argument = "false";
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} else if (strncmp(option, kNo2Prefix, kNo2PrefixLen) == 0) {
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option += kNo2PrefixLen; // Skip the "no-" when looking up the name.
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argument = "false";
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} else {
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argument = "true";
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}
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} else {
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// The argument for the option starts right after the equals sign.
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argument = equals + 1;
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}
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// Initialize the flag name.
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intptr_t name_len = equals - option;
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char* name = new char[name_len + 1];
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strncpy(name, option, name_len);
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name[name_len] = '\0';
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Normalize(name);
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Flag* flag = Flags::Lookup(name);
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if (flag == NULL) {
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// Collect unrecognized flags.
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char* new_flag = new char[name_len + 1];
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strncpy(new_flag, option, name_len);
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new_flag[name_len] = '\0';
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Flags::Register_bool(NULL, new_flag, true, NULL);
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} else {
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// Only set values for recognized flags, skip collected
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// unrecognized flags.
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if (!flag->IsUnrecognized()) {
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if (!SetFlagFromString(flag, argument)) {
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OS::PrintErr("Ignoring flag: %s is an invalid value for flag %s\n",
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argument, name);
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}
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}
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}
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delete[] name;
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}
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static bool IsValidFlag(const char* name,
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const char* prefix,
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intptr_t prefix_length) {
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intptr_t name_length = strlen(name);
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return ((name_length > prefix_length) &&
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(strncmp(name, prefix, prefix_length) == 0));
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}
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int Flags::CompareFlagNames(const void* left, const void* right) {
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const Flag* left_flag = *reinterpret_cast<const Flag* const*>(left);
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const Flag* right_flag = *reinterpret_cast<const Flag* const*>(right);
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return strcmp(left_flag->name_, right_flag->name_);
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}
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char* Flags::ProcessCommandLineFlags(int number_of_vm_flags,
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const char** vm_flags) {
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if (initialized_) {
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return Utils::StrDup("Flags already set");
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}
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qsort(flags_, num_flags_, sizeof flags_[0], CompareFlagNames);
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const char* const kPrefix = "--";
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const intptr_t kPrefixLen = strlen(kPrefix);
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int i = 0;
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while ((i < number_of_vm_flags) &&
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IsValidFlag(vm_flags[i], kPrefix, kPrefixLen)) {
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const char* option = vm_flags[i] + kPrefixLen;
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Parse(option);
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i++;
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}
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if (!FLAG_ignore_unrecognized_flags) {
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int unrecognized_count = 0;
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TextBuffer error(64);
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for (intptr_t j = 0; j < num_flags_; j++) {
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Flag* flag = flags_[j];
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if (flag->IsUnrecognized()) {
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if (unrecognized_count == 0) {
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error.Printf("Unrecognized flags: %s", flag->name_);
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} else {
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error.Printf(", %s", flag->name_);
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}
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unrecognized_count++;
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}
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}
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if (unrecognized_count > 0) {
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return error.Steal();
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}
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}
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if (FLAG_print_flags) {
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PrintFlags();
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}
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initialized_ = true;
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return NULL;
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}
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bool Flags::SetFlag(const char* name, const char* value, const char** error) {
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Flag* flag = Lookup(name);
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if (flag == NULL) {
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*error = "Cannot set flag: flag not found";
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return false;
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}
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if (!SetFlagFromString(flag, value)) {
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*error = "Cannot set flag: invalid value";
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return false;
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}
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return true;
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}
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void Flags::PrintFlags() {
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OS::Print("Flag settings:\n");
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for (intptr_t i = 0; i < num_flags_; ++i) {
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flags_[i]->Print();
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}
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}
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#ifndef PRODUCT
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void Flags::PrintFlagToJSONArray(JSONArray* jsarr, const Flag* flag) {
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if (flag->IsUnrecognized()) {
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return;
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}
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JSONObject jsflag(jsarr);
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jsflag.AddProperty("name", flag->name_);
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jsflag.AddProperty("comment", flag->comment_);
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jsflag.AddProperty("modified", flag->changed_);
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switch (flag->type_) {
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case Flag::kBoolean: {
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jsflag.AddProperty("_flagType", "Bool");
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jsflag.AddProperty("valueAsString",
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(*flag->bool_ptr_ ? "true" : "false"));
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break;
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}
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case Flag::kInteger: {
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jsflag.AddProperty("_flagType", "Int");
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jsflag.AddPropertyF("valueAsString", "%d", *flag->int_ptr_);
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break;
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}
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case Flag::kUint64: {
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jsflag.AddProperty("_flagType", "UInt64");
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jsflag.AddPropertyF("valueAsString", "%" Pu64, *flag->uint64_ptr_);
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break;
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}
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case Flag::kString: {
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jsflag.AddProperty("_flagType", "String");
|
|
if (flag->charp_ptr_ != NULL) {
|
|
jsflag.AddPropertyF("valueAsString", "%s", *flag->charp_ptr_);
|
|
} else {
|
|
// valueAsString missing means NULL.
|
|
}
|
|
break;
|
|
}
|
|
case Flag::kFlagHandler: {
|
|
jsflag.AddProperty("_flagType", "Bool");
|
|
jsflag.AddProperty("valueAsString", flag->string_value_);
|
|
break;
|
|
}
|
|
case Flag::kOptionHandler: {
|
|
jsflag.AddProperty("_flagType", "String");
|
|
if (flag->string_value_ != nullptr) {
|
|
jsflag.AddProperty("valueAsString", flag->string_value_);
|
|
} else {
|
|
// valueAsString missing means NULL.
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
UNREACHABLE();
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Flags::PrintJSON(JSONStream* js) {
|
|
JSONObject jsobj(js);
|
|
jsobj.AddProperty("type", "FlagList");
|
|
JSONArray jsarr(&jsobj, "flags");
|
|
for (intptr_t i = 0; i < num_flags_; ++i) {
|
|
PrintFlagToJSONArray(&jsarr, flags_[i]);
|
|
}
|
|
}
|
|
#endif // !PRODUCT
|
|
|
|
} // namespace dart
|