1//===--- Disasm.cpp - Disassembler for bytecode functions -------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Dump method for Function which disassembles the bytecode.
10//
11//===----------------------------------------------------------------------===//
12
13#include "Function.h"
14#include "Opcode.h"
15#include "PrimType.h"
16#include "Program.h"
17#include "clang/AST/DeclCXX.h"
18#include "llvm/Support/Compiler.h"
19#include "llvm/Support/Format.h"
20
21using namespace clang;
22using namespace clang::interp;
23
24template <typename T> inline T ReadArg(Program &P, CodePtr &OpPC) {
25  if constexpr (std::is_pointer_v<T>) {
26    uint32_t ID = OpPC.read<uint32_t>();
27    return reinterpret_cast<T>(P.getNativePointer(ID));
28  } else {
29    return OpPC.read<T>();
30  }
31}
32
33LLVM_DUMP_METHOD void Function::dump() const { dump(llvm::errs()); }
34
35LLVM_DUMP_METHOD void Function::dump(llvm::raw_ostream &OS) const {
36  if (F) {
37    if (auto *Cons = dyn_cast<CXXConstructorDecl>(F)) {
38      DeclarationName Name = Cons->getParent()->getDeclName();
39      OS << Name << "::" << Name;
40    } else {
41      OS << F->getDeclName();
42    }
43    OS << " " << (const void*)this << ":\n";
44  } else {
45    OS << "<<expr>>\n";
46  }
47
48  OS << "frame size: " << getFrameSize() << "\n";
49  OS << "arg size:   " << getArgSize() << "\n";
50  OS << "rvo:        " << hasRVO() << "\n";
51  OS << "this arg:   " << hasThisPointer() << "\n";
52
53  auto PrintName = [&OS](const char *Name) {
54    OS << Name;
55    for (long I = 0, N = strlen(Name); I < 30 - N; ++I) {
56      OS << ' ';
57    }
58  };
59
60  for (CodePtr Start = getCodeBegin(), PC = Start; PC != getCodeEnd();) {
61    size_t Addr = PC - Start;
62    auto Op = PC.read<Opcode>();
63    OS << llvm::format("%8d", Addr) << " ";
64    switch (Op) {
65#define GET_DISASM
66#include "Opcodes.inc"
67#undef GET_DISASM
68    }
69  }
70}
71
72LLVM_DUMP_METHOD void Program::dump() const { dump(llvm::errs()); }
73
74LLVM_DUMP_METHOD void Program::dump(llvm::raw_ostream &OS) const {
75  OS << ":: Program\n";
76  OS << "Global Variables: " << Globals.size() << "\n";
77  OS << "Functions: " << Funcs.size() << "\n";
78  OS << "\n";
79  for (auto &Func : Funcs) {
80    Func.second->dump();
81  }
82  for (auto &Anon : AnonFuncs) {
83    Anon->dump();
84  }
85}
86