1 //===----- LLJITDumpObjects.cpp - How to dump JIT'd objects with LLJIT ----===//
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 #include "llvm/ADT/StringMap.h"
10 #include "llvm/ExecutionEngine/Orc/DebugUtils.h"
11 #include "llvm/ExecutionEngine/Orc/LLJIT.h"
12 #include "llvm/Support/InitLLVM.h"
13 #include "llvm/Support/TargetSelect.h"
14 #include "llvm/Support/raw_ostream.h"
15
16 #include "../ExampleModules.h"
17
18 using namespace llvm;
19 using namespace llvm::orc;
20
21 ExitOnError ExitOnErr;
22
23 cl::opt<bool> DumpJITdObjects("dump-jitted-objects",
24 cl::desc("dump jitted objects"), cl::Optional,
25 cl::init(true));
26
27 cl::opt<std::string> DumpDir("dump-dir",
28 cl::desc("directory to dump objects to"),
29 cl::Optional, cl::init(""));
30
31 cl::opt<std::string> DumpFileStem("dump-file-stem",
32 cl::desc("Override default dump names"),
33 cl::Optional, cl::init(""));
34
main(int argc,char * argv[])35 int main(int argc, char *argv[]) {
36 // Initialize LLVM.
37 InitLLVM X(argc, argv);
38
39 InitializeNativeTarget();
40 InitializeNativeTargetAsmPrinter();
41
42 cl::ParseCommandLineOptions(argc, argv, "LLJITDumpObjects");
43 ExitOnErr.setBanner(std::string(argv[0]) + ": ");
44
45 outs()
46 << "Usage notes:\n"
47 " Use -debug-only=orc on debug builds to see log messages of objects "
48 "being dumped\n"
49 " Specify -dump-dir to specify a dump directory\n"
50 " Specify -dump-file-stem to override the dump file stem\n"
51 " Specify -dump-jitted-objects=false to disable dumping\n";
52
53 auto J = ExitOnErr(LLJITBuilder().create());
54
55 if (DumpJITdObjects)
56 J->getObjTransformLayer().setTransform(DumpObjects(DumpDir, DumpFileStem));
57
58 auto M = ExitOnErr(parseExampleModule(Add1Example, "add1"));
59
60 ExitOnErr(J->addIRModule(std::move(M)));
61
62 // Look up the JIT'd function, cast it to a function pointer, then call it.
63 auto Add1Sym = ExitOnErr(J->lookup("add1"));
64 int (*Add1)(int) = (int (*)(int))Add1Sym.getAddress();
65
66 int Result = Add1(42);
67 outs() << "add1(42) = " << Result << "\n";
68
69 return 0;
70 }
71