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 "Floating.h"
14 #include "Function.h"
15 #include "Opcode.h"
16 #include "PrimType.h"
17 #include "Program.h"
18 #include "clang/AST/DeclCXX.h"
19 #include "llvm/Support/Compiler.h"
20 #include "llvm/Support/Format.h"
21 
22 using namespace clang;
23 using namespace clang::interp;
24 
25 template <typename T> inline T ReadArg(Program &P, CodePtr &OpPC) {
26   if constexpr (std::is_pointer_v<T>) {
27     uint32_t ID = OpPC.read<uint32_t>();
28     return reinterpret_cast<T>(P.getNativePointer(ID));
29   } else {
30     return OpPC.read<T>();
31   }
32 }
33 
34 LLVM_DUMP_METHOD void Function::dump() const { dump(llvm::errs()); }
35 
36 LLVM_DUMP_METHOD void Function::dump(llvm::raw_ostream &OS) const {
37   OS << getName() << " " << (const void *)this << "\n";
38   OS << "frame size: " << getFrameSize() << "\n";
39   OS << "arg size:   " << getArgSize() << "\n";
40   OS << "rvo:        " << hasRVO() << "\n";
41   OS << "this arg:   " << hasThisPointer() << "\n";
42 
43   auto PrintName = [&OS](const char *Name) {
44     OS << Name;
45     long N = 30 - strlen(Name);
46     if (N > 0)
47       OS.indent(N);
48   };
49 
50   for (CodePtr Start = getCodeBegin(), PC = Start; PC != getCodeEnd();) {
51     size_t Addr = PC - Start;
52     auto Op = PC.read<Opcode>();
53     OS << llvm::format("%8d", Addr) << " ";
54     switch (Op) {
55 #define GET_DISASM
56 #include "Opcodes.inc"
57 #undef GET_DISASM
58     }
59   }
60 }
61 
62 LLVM_DUMP_METHOD void Program::dump() const { dump(llvm::errs()); }
63 
64 LLVM_DUMP_METHOD void Program::dump(llvm::raw_ostream &OS) const {
65   OS << ":: Program\n";
66   OS << "Global Variables: " << Globals.size() << "\n";
67   OS << "Functions: " << Funcs.size() << "\n";
68   OS << "\n";
69   for (auto &Func : Funcs) {
70     Func.second->dump();
71   }
72   for (auto &Anon : AnonFuncs) {
73     Anon->dump();
74   }
75 }
76