1 //===- bugpoint.cpp - The LLVM Bugpoint utility ---------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This program is an automated compiler debugger tool.  It is used to narrow
11 // down miscompilations and crash problems to a specific pass in the compiler,
12 // and the specific Module or Function input that is causing the problem.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #include "BugDriver.h"
17 #include "llvm/Support/PassNameParser.h"
18 #include "llvm/Support/ToolRunner.h"
19 #include "Support/CommandLine.h"
20 #include "Support/Signals.h"
21 #include "Config/unistd.h"
22 #include <sys/resource.h>
23 using namespace llvm;
24 
25 static cl::list<std::string>
26 InputFilenames(cl::Positional, cl::OneOrMore,
27                cl::desc("<input llvm ll/bc files>"));
28 
29 // The AnalysesList is automatically populated with registered Passes by the
30 // PassNameParser.
31 //
32 static cl::list<const PassInfo*, bool, PassNameParser>
33 PassList(cl::desc("Passes available:"), cl::ZeroOrMore);
34 
35 int main(int argc, char **argv) {
36   cl::ParseCommandLineOptions(argc, argv,
37                               " LLVM automatic testcase reducer. See\nhttp://"
38                               "llvm.cs.uiuc.edu/docs/CommandGuide/bugpoint.html"
39                               " for more information.\n");
40   PrintStackTraceOnErrorSignal();
41 
42   BugDriver D(argv[0]);
43   if (D.addSources(InputFilenames)) return 1;
44   D.addPasses(PassList.begin(), PassList.end());
45 
46   // Bugpoint has the ability of generating a plethora of core files, so to
47   // avoid filling up the disk, set the max core file size to 0.
48   struct rlimit rlim;
49   rlim.rlim_cur = rlim.rlim_max = 0;
50   int res = setrlimit(RLIMIT_CORE, &rlim);
51   if (res < 0) {
52     // setrlimit() may have failed, but we're not going to let that stop us
53     perror("setrlimit: RLIMIT_CORE");
54   }
55 
56   try {
57     return D.run();
58   } catch (ToolExecutionError &TEE) {
59     std::cerr << "Tool execution error: " << TEE.what() << "\n";
60     return 1;
61   } catch (...) {
62     std::cerr << "Whoops, an exception leaked out of bugpoint.  "
63               << "This is a bug in bugpoint!\n";
64     return 1;
65   }
66 }
67