classnameTab
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ridethepig
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@ -262,3 +262,7 @@ PA 2-5 正式写编译器。PA2 写词法分析器，首先读一遍 README 和
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- 栈和寄存器约定：方法调用参数放在栈上、从左到右依次压栈，`a0` 寄存器里面放 `self` 对象指针。指定了一组 Scratch registers 供 runtime routine 存放临时数据，因此需要调用者保存；还有堆指针和堆界限两个寄存器，完全由 runtime 控制。其他的都可以用。
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- Label：生成的代码需要和 runtime 一起变成最后执行的机器码，因此有一些 label 是指定的，就类似于接口一样的东西。有些 label 是 runtime 提供给我们使用的，也有一些需要我们生成供 runtime 使用。有一句话 `There is no need for code that initializes an object of class Bool if the generated code contains definitions of both Bool objects in the static data area.` 没看懂
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- 执行初始化：需要生成一些代码来调用 main 方法。首先通过 Main prototype 生成一个 Main 类的对象并用 `Main_init` 初始化，该初始化方法依次执行 Main 的基类的初始化最后初始化 Main；然后调用 `Main.main`，在 `a0` 里面放上 `Main` 的指针并设置 `ra`；执行结束后，`Main.main` 返回，这里打印出提示信息并终止执行。
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#### 读框架
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这次的框架代码非常的多，而且写的很抽象，因此讲一讲。其实最好的方法是自己写个测试代码，然后用参考编译器生成出来看一看具体是啥样子的，光看他的 skeleton 是真的要绕半天。
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@ -26,7 +26,7 @@ FFLAGS = -d8 -ocool-lex.cc
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BFLAGS = -d -v -y -b cool --debug -p cool_yy
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CC=g++
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CFLAGS=-g -Wall -Wno-unused -Wno-write-strings -Wno-deprecated ${CPPINCLUDE} -DDEBUG -std=c++11
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CFLAGS=-g -Wall -Wno-unused -Wno-write-strings -Wno-deprecated ${CPPINCLUDE} -DDEBUG -std=c++11 -Wno-unknown-pragmas
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FLEX=flex ${FFLAGS}
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BISON= bison ${BFLAGS}
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DEPEND = ${CC} -MM ${CPPINCLUDE}
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@ -24,6 +24,7 @@
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#include "cgen.h"
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#include "cgen_gc.h"
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#include <cassert>
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#include <iostream>
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extern void emit_string_constant(ostream &str, char *s);
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@ -127,6 +128,8 @@ void program_class::cgen(ostream &os) {
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//
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//////////////////////////////////////////////////////////////////////////////
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#pragma region StaticEmitProcedures
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static void emit_load(char *dest_reg, int offset, char *source_reg,
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ostream &s) {
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s << LW << dest_reg << " " << offset * WORD_SIZE << "(" << source_reg << ")"
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@ -326,6 +329,8 @@ static void emit_gc_check(char *source, ostream &s) {
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s << JAL << "_gc_check" << endl;
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}
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#pragma endregion
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///////////////////////////////////////////////////////////////////////////////
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//
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// coding strings, ints, and booleans
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@ -347,6 +352,8 @@ static void emit_gc_check(char *source, ostream &s) {
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//
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///////////////////////////////////////////////////////////////////////////////
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#pragma region ConstantCoding
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//
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// Strings
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//
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@ -454,6 +461,8 @@ void BoolConst::code_def(ostream &s, int boolclasstag) {
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s << WORD << val << endl; // value (0 or 1)
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}
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#pragma endregion
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//////////////////////////////////////////////////////////////////////////////
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//
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// CgenClassTable methods
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@ -575,12 +584,22 @@ void CgenClassTable::code_constants() {
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code_bools(boolclasstag);
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}
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CgenClassTable::CgenClassTable(Classes classes, ostream &s)
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: nds(NULL), str(s) {
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stringclasstag = 1 /* Change to your String class tag here */;
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intclasstag = 2 /* Change to your Int class tag here */;
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boolclasstag = 3 /* Change to your Bool class tag here */;
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void CgenClassTable::code_class_nameTable() {
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str << CLASSNAMETAB << LABEL;
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for (auto node : nodes) {
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auto name_entry = stringtable.lookup_string(node->name->get_string());
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str << WORD;
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name_entry->code_ref(str);
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str << "\n";
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}
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}
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void CgenClassTable::code_dispatchTable() {}
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void CgenClassTable::code_prototypeObject() {}
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CgenClassTable::CgenClassTable(Classes classes, ostream &s) : str(s) {
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enterscope();
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if (cgen_debug)
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cout << "Building CgenClassTable" << endl;
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@ -606,6 +625,7 @@ void CgenClassTable::install_basic_classes() {
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// No_class serves as the parent of Object and the other special classes.
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// SELF_TYPE is the self class; it cannot be redefined or inherited.
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// prim_slot is a class known to the code generator.
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// it serves as the value type of Int, Boolean, String
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//
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addid(No_class,
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new CgenNode(class_(No_class, No_class, nil_Features(), filename),
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@ -710,6 +730,10 @@ void CgenClassTable::install_basic_classes() {
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Str, no_expr()))),
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filename),
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Basic, this));
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stringclasstag = get_node(Str)->get_class_tag();
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intclasstag = get_node(Int)->get_class_tag();
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boolclasstag = get_node(Bool)->get_class_tag();
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}
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// CgenClassTable::install_class
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@ -726,7 +750,8 @@ void CgenClassTable::install_class(CgenNodeP nd) {
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// The class name is legal, so add it to the list of classes
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// and the symbol table.
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nds = new List<CgenNode>(nd, nds);
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nodes.push_back(nd);
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nd->set_class_tag(nodes.size());
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addid(name, nd);
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}
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@ -739,8 +764,8 @@ void CgenClassTable::install_classes(Classes cs) {
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// CgenClassTable::build_inheritance_tree
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//
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void CgenClassTable::build_inheritance_tree() {
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for (List<CgenNode> *l = nds; l; l = l->tl())
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set_relations(l->hd());
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for (auto node : nodes)
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set_relations(node);
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}
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//
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@ -755,9 +780,7 @@ void CgenClassTable::set_relations(CgenNodeP nd) {
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parent_node->add_child(nd);
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}
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void CgenNode::add_child(CgenNodeP n) {
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children = new List<CgenNode>(n, children);
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}
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void CgenNode::add_child(CgenNodeP n) { children.push_back(n); }
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void CgenNode::set_parentnd(CgenNodeP p) {
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assert(parentnd == NULL);
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@ -765,11 +788,19 @@ void CgenNode::set_parentnd(CgenNodeP p) {
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parentnd = p;
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}
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void CgenNode::traverse_dump(int pad) {
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for (int i = 0; i < pad; ++i)
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std::cerr << " ";
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std::cerr << this->name << ":" << this->_class_tag << "\n";
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for (auto child : children) {
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child->traverse_dump(pad + 2);
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}
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}
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void CgenClassTable::dump_inheritance_tree() {
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CgenNode *object_node = nullptr;
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for (auto l = nds; l; l = l->tl()) {
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auto cur_node = l->hd();
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for (auto cur_node : nodes) {
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if (cur_node->name == Object) {
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object_node = cur_node;
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break;
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@ -778,6 +809,18 @@ void CgenClassTable::dump_inheritance_tree() {
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object_node->traverse_dump(0);
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}
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CgenNode *CgenClassTable::get_node(Symbol class_name) {
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for (auto node : nodes) {
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if (node->name == class_name) {
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return node;
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}
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}
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if (cgen_debug)
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std::cerr << "get_node " << class_name << " not found\n";
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assert(0);
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return nullptr;
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}
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void CgenClassTable::code() {
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if (cgen_debug)
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cout << "coding global data" << endl;
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@ -791,6 +834,10 @@ void CgenClassTable::code() {
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cout << "coding constants" << endl;
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code_constants();
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if (cgen_debug)
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cout << "coding class_nameTab" << endl;
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code_class_nameTable();
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// Add your code to emit
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// - prototype objects
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// - class_nameTab
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@ -816,7 +863,7 @@ CgenNodeP CgenClassTable::root() { return probe(Object); }
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///////////////////////////////////////////////////////////////////////
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CgenNode::CgenNode(Class_ nd, Basicness bstatus, CgenClassTableP ct)
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: class__class((const class__class &)*nd), parentnd(NULL), children(NULL),
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: class__class((const class__class &)*nd), parentnd(NULL),
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basic_status(bstatus) {
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stringtable.add_string(name->get_string()); // Add class name to string table
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}
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@ -831,6 +878,8 @@ CgenNode::CgenNode(Class_ nd, Basicness bstatus, CgenClassTableP ct)
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//
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//*****************************************************************
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#pragma region ExpressionCoding
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void assign_class::code(ostream &s) {}
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void static_dispatch_class::code(ostream &s) {}
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@ -887,3 +936,5 @@ void isvoid_class::code(ostream &s) {}
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void no_expr_class::code(ostream &s) {}
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void object_class::code(ostream &s) {}
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#pragma endregion
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@ -2,6 +2,8 @@
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#include "emit.h"
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#include "symtab.h"
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#include <assert.h>
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#include <cstdint>
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#include <vector>
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#include <iostream>
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#include <stdio.h>
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@ -17,7 +19,7 @@ typedef CgenNode *CgenNodeP;
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class CgenClassTable : public SymbolTable<Symbol, CgenNode> {
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private:
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List<CgenNode> *nds;
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std::vector<CgenNode*> nodes;
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ostream &str;
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int stringclasstag;
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int intclasstag;
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@ -44,6 +46,10 @@ private:
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void set_relations(CgenNodeP nd);
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//* New Methods
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void dump_inheritance_tree();
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void code_class_nameTable();
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void code_dispatchTable();
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void code_prototypeObject();
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CgenNode* get_node(Symbol);
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public:
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CgenClassTable(Classes, ostream &str);
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@ -54,26 +60,25 @@ public:
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class CgenNode : public class__class {
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private:
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CgenNodeP parentnd; // Parent of class
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List<CgenNode> *children; // Children of class
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std::vector<CgenNode*> children; // Children of class
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Basicness basic_status; // `Basic' if class is basic
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// `NotBasic' otherwise
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uint32_t _class_tag = 0;
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/* Allocate a class_tag on first scan increase in scanning order,
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starting from 1, so 0 is actually invalid by design
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*/
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public:
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CgenNode(Class_ c, Basicness bstatus, CgenClassTableP class_table);
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void add_child(CgenNodeP child);
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List<CgenNode> *get_children() { return children; }
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std::vector<CgenNode*>& get_children() { return children; }
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void set_parentnd(CgenNodeP p);
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CgenNodeP get_parentnd() { return parentnd; }
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int basic() { return (basic_status == Basic); }
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void traverse_dump(int pad) {
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for (int i = 0; i < pad; ++i)
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std::cerr << " ";
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std::cerr << this->name << "\n";
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for (auto l = children; l; l = l->tl()) {
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l->hd()->traverse_dump(pad + 2);
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}
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}
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uint32_t get_class_tag() { return _class_tag; }
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void set_class_tag(uint32_t val) { _class_tag = val; }
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void traverse_dump(int pad);
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};
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class BoolConst {
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