4f5337a2b6
When compiling on a laptop I like to concatenate the small test files. This makes a big difference to compile times. These changes make that easier. R=ulan@chromium.org BUG= Review URL: https://codereview.chromium.org/1163803002 Cr-Commit-Position: refs/heads/master@{#28742}
579 lines
16 KiB
C++
579 lines
16 KiB
C++
// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <cctype>
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#include <cstdlib>
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#include <sstream>
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#include "src/v8.h"
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#include "src/assembler.h"
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#include "src/base/functional.h"
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#include "src/base/platform/platform.h"
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#include "src/ostreams.h"
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namespace v8 {
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namespace internal {
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// Define all of our flags.
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#define FLAG_MODE_DEFINE
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#include "src/flag-definitions.h" // NOLINT
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// Define all of our flags default values.
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#define FLAG_MODE_DEFINE_DEFAULTS
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#include "src/flag-definitions.h" // NOLINT
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namespace {
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// This structure represents a single entry in the flag system, with a pointer
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// to the actual flag, default value, comment, etc. This is designed to be POD
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// initialized as to avoid requiring static constructors.
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struct Flag {
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enum FlagType { TYPE_BOOL, TYPE_MAYBE_BOOL, TYPE_INT, TYPE_FLOAT,
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TYPE_STRING, TYPE_ARGS };
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FlagType type_; // What type of flag, bool, int, or string.
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const char* name_; // Name of the flag, ex "my_flag".
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void* valptr_; // Pointer to the global flag variable.
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const void* defptr_; // Pointer to the default value.
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const char* cmt_; // A comment about the flags purpose.
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bool owns_ptr_; // Does the flag own its string value?
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FlagType type() const { return type_; }
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const char* name() const { return name_; }
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const char* comment() const { return cmt_; }
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bool* bool_variable() const {
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DCHECK(type_ == TYPE_BOOL);
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return reinterpret_cast<bool*>(valptr_);
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}
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MaybeBoolFlag* maybe_bool_variable() const {
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DCHECK(type_ == TYPE_MAYBE_BOOL);
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return reinterpret_cast<MaybeBoolFlag*>(valptr_);
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}
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int* int_variable() const {
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DCHECK(type_ == TYPE_INT);
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return reinterpret_cast<int*>(valptr_);
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}
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double* float_variable() const {
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DCHECK(type_ == TYPE_FLOAT);
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return reinterpret_cast<double*>(valptr_);
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}
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const char* string_value() const {
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DCHECK(type_ == TYPE_STRING);
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return *reinterpret_cast<const char**>(valptr_);
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}
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void set_string_value(const char* value, bool owns_ptr) {
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DCHECK(type_ == TYPE_STRING);
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const char** ptr = reinterpret_cast<const char**>(valptr_);
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if (owns_ptr_ && *ptr != NULL) DeleteArray(*ptr);
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*ptr = value;
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owns_ptr_ = owns_ptr;
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}
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JSArguments* args_variable() const {
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DCHECK(type_ == TYPE_ARGS);
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return reinterpret_cast<JSArguments*>(valptr_);
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}
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bool bool_default() const {
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DCHECK(type_ == TYPE_BOOL);
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return *reinterpret_cast<const bool*>(defptr_);
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}
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int int_default() const {
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DCHECK(type_ == TYPE_INT);
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return *reinterpret_cast<const int*>(defptr_);
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}
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double float_default() const {
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DCHECK(type_ == TYPE_FLOAT);
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return *reinterpret_cast<const double*>(defptr_);
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}
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const char* string_default() const {
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DCHECK(type_ == TYPE_STRING);
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return *reinterpret_cast<const char* const *>(defptr_);
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}
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JSArguments args_default() const {
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DCHECK(type_ == TYPE_ARGS);
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return *reinterpret_cast<const JSArguments*>(defptr_);
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}
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// Compare this flag's current value against the default.
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bool IsDefault() const {
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switch (type_) {
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case TYPE_BOOL:
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return *bool_variable() == bool_default();
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case TYPE_MAYBE_BOOL:
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return maybe_bool_variable()->has_value == false;
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case TYPE_INT:
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return *int_variable() == int_default();
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case TYPE_FLOAT:
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return *float_variable() == float_default();
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case TYPE_STRING: {
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const char* str1 = string_value();
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const char* str2 = string_default();
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if (str2 == NULL) return str1 == NULL;
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if (str1 == NULL) return str2 == NULL;
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return strcmp(str1, str2) == 0;
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}
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case TYPE_ARGS:
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return args_variable()->argc == 0;
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}
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UNREACHABLE();
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return true;
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}
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// Set a flag back to it's default value.
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void Reset() {
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switch (type_) {
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case TYPE_BOOL:
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*bool_variable() = bool_default();
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break;
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case TYPE_MAYBE_BOOL:
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*maybe_bool_variable() = MaybeBoolFlag::Create(false, false);
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break;
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case TYPE_INT:
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*int_variable() = int_default();
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break;
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case TYPE_FLOAT:
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*float_variable() = float_default();
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break;
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case TYPE_STRING:
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set_string_value(string_default(), false);
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break;
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case TYPE_ARGS:
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*args_variable() = args_default();
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break;
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}
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}
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};
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Flag flags[] = {
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#define FLAG_MODE_META
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#include "src/flag-definitions.h"
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};
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const size_t num_flags = sizeof(flags) / sizeof(*flags);
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} // namespace
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static const char* Type2String(Flag::FlagType type) {
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switch (type) {
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case Flag::TYPE_BOOL: return "bool";
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case Flag::TYPE_MAYBE_BOOL: return "maybe_bool";
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case Flag::TYPE_INT: return "int";
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case Flag::TYPE_FLOAT: return "float";
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case Flag::TYPE_STRING: return "string";
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case Flag::TYPE_ARGS: return "arguments";
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}
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UNREACHABLE();
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return NULL;
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}
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std::ostream& operator<<(std::ostream& os, const Flag& flag) { // NOLINT
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switch (flag.type()) {
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case Flag::TYPE_BOOL:
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os << (*flag.bool_variable() ? "true" : "false");
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break;
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case Flag::TYPE_MAYBE_BOOL:
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os << (flag.maybe_bool_variable()->has_value
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? (flag.maybe_bool_variable()->value ? "true" : "false")
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: "unset");
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break;
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case Flag::TYPE_INT:
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os << *flag.int_variable();
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break;
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case Flag::TYPE_FLOAT:
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os << *flag.float_variable();
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break;
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case Flag::TYPE_STRING: {
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const char* str = flag.string_value();
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os << (str ? str : "NULL");
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break;
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}
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case Flag::TYPE_ARGS: {
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JSArguments args = *flag.args_variable();
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if (args.argc > 0) {
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os << args[0];
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for (int i = 1; i < args.argc; i++) {
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os << args[i];
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}
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}
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break;
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}
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}
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return os;
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}
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// static
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List<const char*>* FlagList::argv() {
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List<const char*>* args = new List<const char*>(8);
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Flag* args_flag = NULL;
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for (size_t i = 0; i < num_flags; ++i) {
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Flag* f = &flags[i];
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if (!f->IsDefault()) {
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if (f->type() == Flag::TYPE_ARGS) {
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DCHECK(args_flag == NULL);
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args_flag = f; // Must be last in arguments.
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continue;
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}
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{
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bool disabled = f->type() == Flag::TYPE_BOOL && !*f->bool_variable();
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std::ostringstream os;
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os << (disabled ? "--no" : "--") << f->name();
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args->Add(StrDup(os.str().c_str()));
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}
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if (f->type() != Flag::TYPE_BOOL) {
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std::ostringstream os;
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os << *f;
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args->Add(StrDup(os.str().c_str()));
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}
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}
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}
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if (args_flag != NULL) {
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std::ostringstream os;
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os << "--" << args_flag->name();
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args->Add(StrDup(os.str().c_str()));
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JSArguments jsargs = *args_flag->args_variable();
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for (int j = 0; j < jsargs.argc; j++) {
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args->Add(StrDup(jsargs[j]));
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}
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}
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return args;
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}
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inline char NormalizeChar(char ch) {
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return ch == '_' ? '-' : ch;
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}
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// Helper function to parse flags: Takes an argument arg and splits it into
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// a flag name and flag value (or NULL if they are missing). is_bool is set
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// if the arg started with "-no" or "--no". The buffer may be used to NUL-
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// terminate the name, it must be large enough to hold any possible name.
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static void SplitArgument(const char* arg,
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char* buffer,
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int buffer_size,
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const char** name,
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const char** value,
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bool* is_bool) {
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*name = NULL;
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*value = NULL;
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*is_bool = false;
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if (arg != NULL && *arg == '-') {
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// find the begin of the flag name
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arg++; // remove 1st '-'
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if (*arg == '-') {
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arg++; // remove 2nd '-'
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if (arg[0] == '\0') {
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const char* kJSArgumentsFlagName = "js_arguments";
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*name = kJSArgumentsFlagName;
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return;
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}
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}
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if (arg[0] == 'n' && arg[1] == 'o') {
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arg += 2; // remove "no"
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if (NormalizeChar(arg[0]) == '-') arg++; // remove dash after "no".
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*is_bool = true;
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}
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*name = arg;
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// find the end of the flag name
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while (*arg != '\0' && *arg != '=')
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arg++;
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// get the value if any
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if (*arg == '=') {
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// make a copy so we can NUL-terminate flag name
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size_t n = arg - *name;
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CHECK(n < static_cast<size_t>(buffer_size)); // buffer is too small
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MemCopy(buffer, *name, n);
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buffer[n] = '\0';
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*name = buffer;
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// get the value
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*value = arg + 1;
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}
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}
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}
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static bool EqualNames(const char* a, const char* b) {
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for (int i = 0; NormalizeChar(a[i]) == NormalizeChar(b[i]); i++) {
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if (a[i] == '\0') {
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return true;
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}
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}
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return false;
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}
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static Flag* FindFlag(const char* name) {
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for (size_t i = 0; i < num_flags; ++i) {
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if (EqualNames(name, flags[i].name()))
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return &flags[i];
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}
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return NULL;
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}
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// static
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int FlagList::SetFlagsFromCommandLine(int* argc,
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char** argv,
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bool remove_flags) {
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int return_code = 0;
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// parse arguments
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for (int i = 1; i < *argc;) {
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int j = i; // j > 0
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const char* arg = argv[i++];
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// split arg into flag components
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char buffer[1*KB];
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const char* name;
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const char* value;
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bool is_bool;
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SplitArgument(arg, buffer, sizeof buffer, &name, &value, &is_bool);
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if (name != NULL) {
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// lookup the flag
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Flag* flag = FindFlag(name);
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if (flag == NULL) {
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if (remove_flags) {
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// We don't recognize this flag but since we're removing
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// the flags we recognize we assume that the remaining flags
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// will be processed somewhere else so this flag might make
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// sense there.
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continue;
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} else {
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PrintF(stderr, "Error: unrecognized flag %s\n"
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"Try --help for options\n", arg);
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return_code = j;
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break;
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}
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}
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// if we still need a flag value, use the next argument if available
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if (flag->type() != Flag::TYPE_BOOL &&
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flag->type() != Flag::TYPE_MAYBE_BOOL &&
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flag->type() != Flag::TYPE_ARGS &&
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value == NULL) {
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if (i < *argc) {
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value = argv[i++];
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}
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if (!value) {
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PrintF(stderr, "Error: missing value for flag %s of type %s\n"
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"Try --help for options\n",
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arg, Type2String(flag->type()));
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return_code = j;
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break;
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}
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}
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// set the flag
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char* endp = const_cast<char*>(""); // *endp is only read
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switch (flag->type()) {
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case Flag::TYPE_BOOL:
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*flag->bool_variable() = !is_bool;
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break;
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case Flag::TYPE_MAYBE_BOOL:
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*flag->maybe_bool_variable() = MaybeBoolFlag::Create(true, !is_bool);
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break;
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case Flag::TYPE_INT:
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*flag->int_variable() = static_cast<int>(strtol(value, &endp, 10));
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break;
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case Flag::TYPE_FLOAT:
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*flag->float_variable() = strtod(value, &endp);
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break;
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case Flag::TYPE_STRING:
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flag->set_string_value(value ? StrDup(value) : NULL, true);
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break;
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case Flag::TYPE_ARGS: {
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int start_pos = (value == NULL) ? i : i - 1;
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int js_argc = *argc - start_pos;
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const char** js_argv = NewArray<const char*>(js_argc);
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if (value != NULL) {
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js_argv[0] = StrDup(value);
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}
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for (int k = i; k < *argc; k++) {
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js_argv[k - start_pos] = StrDup(argv[k]);
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}
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*flag->args_variable() = JSArguments::Create(js_argc, js_argv);
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i = *argc; // Consume all arguments
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break;
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}
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}
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// handle errors
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bool is_bool_type = flag->type() == Flag::TYPE_BOOL ||
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flag->type() == Flag::TYPE_MAYBE_BOOL;
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if ((is_bool_type && value != NULL) || (!is_bool_type && is_bool) ||
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*endp != '\0') {
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PrintF(stderr, "Error: illegal value for flag %s of type %s\n"
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"Try --help for options\n",
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arg, Type2String(flag->type()));
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return_code = j;
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break;
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}
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// remove the flag & value from the command
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if (remove_flags) {
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while (j < i) {
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argv[j++] = NULL;
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}
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}
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}
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}
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// shrink the argument list
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if (remove_flags) {
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int j = 1;
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for (int i = 1; i < *argc; i++) {
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if (argv[i] != NULL)
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argv[j++] = argv[i];
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}
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*argc = j;
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}
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if (FLAG_help) {
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PrintHelp();
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exit(0);
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}
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// parsed all flags successfully
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return return_code;
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}
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static char* SkipWhiteSpace(char* p) {
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while (*p != '\0' && isspace(*p) != 0) p++;
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return p;
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}
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static char* SkipBlackSpace(char* p) {
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while (*p != '\0' && isspace(*p) == 0) p++;
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return p;
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}
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// static
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int FlagList::SetFlagsFromString(const char* str, int len) {
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// make a 0-terminated copy of str
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ScopedVector<char> copy0(len + 1);
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MemCopy(copy0.start(), str, len);
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copy0[len] = '\0';
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// strip leading white space
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char* copy = SkipWhiteSpace(copy0.start());
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// count the number of 'arguments'
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int argc = 1; // be compatible with SetFlagsFromCommandLine()
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for (char* p = copy; *p != '\0'; argc++) {
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p = SkipBlackSpace(p);
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p = SkipWhiteSpace(p);
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}
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// allocate argument array
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ScopedVector<char*> argv(argc);
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// split the flags string into arguments
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argc = 1; // be compatible with SetFlagsFromCommandLine()
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for (char* p = copy; *p != '\0'; argc++) {
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argv[argc] = p;
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p = SkipBlackSpace(p);
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if (*p != '\0') *p++ = '\0'; // 0-terminate argument
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p = SkipWhiteSpace(p);
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}
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// set the flags
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int result = SetFlagsFromCommandLine(&argc, argv.start(), false);
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return result;
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}
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// static
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void FlagList::ResetAllFlags() {
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for (size_t i = 0; i < num_flags; ++i) {
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flags[i].Reset();
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}
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}
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// static
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void FlagList::PrintHelp() {
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CpuFeatures::Probe(false);
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CpuFeatures::PrintTarget();
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CpuFeatures::PrintFeatures();
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OFStream os(stdout);
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os << "Usage:\n"
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<< " shell [options] -e string\n"
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<< " execute string in V8\n"
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<< " shell [options] file1 file2 ... filek\n"
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<< " run JavaScript scripts in file1, file2, ..., filek\n"
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<< " shell [options]\n"
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<< " shell [options] --shell [file1 file2 ... filek]\n"
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<< " run an interactive JavaScript shell\n"
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<< " d8 [options] file1 file2 ... filek\n"
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<< " d8 [options]\n"
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<< " d8 [options] --shell [file1 file2 ... filek]\n"
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<< " run the new debugging shell\n\n"
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<< "Options:\n";
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for (size_t i = 0; i < num_flags; ++i) {
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Flag* f = &flags[i];
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|
os << " --" << f->name() << " (" << f->comment() << ")\n"
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|
<< " type: " << Type2String(f->type()) << " default: " << *f
|
|
<< "\n";
|
|
}
|
|
}
|
|
|
|
|
|
static uint32_t flag_hash = 0;
|
|
|
|
|
|
void ComputeFlagListHash() {
|
|
std::ostringstream modified_args_as_string;
|
|
#ifdef DEBUG
|
|
modified_args_as_string << "debug";
|
|
#endif // DEBUG
|
|
for (size_t i = 0; i < num_flags; ++i) {
|
|
Flag* current = &flags[i];
|
|
if (!current->IsDefault()) {
|
|
modified_args_as_string << i;
|
|
modified_args_as_string << *current;
|
|
}
|
|
}
|
|
std::string args(modified_args_as_string.str());
|
|
flag_hash = static_cast<uint32_t>(
|
|
base::hash_range(args.c_str(), args.c_str() + args.length()));
|
|
}
|
|
|
|
|
|
// static
|
|
void FlagList::EnforceFlagImplications() {
|
|
#define FLAG_MODE_DEFINE_IMPLICATIONS
|
|
#include "src/flag-definitions.h"
|
|
#undef FLAG_MODE_DEFINE_IMPLICATIONS
|
|
ComputeFlagListHash();
|
|
}
|
|
|
|
|
|
uint32_t FlagList::Hash() { return flag_hash; }
|
|
} // namespace internal
|
|
} // namespace v8
|