Mercurial > hg > Members > tobaru > cbc > CbC_llvm
annotate lib/Support/ErrorHandling.cpp @ 3:9ad51c7bc036
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author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Wed, 15 May 2013 06:43:32 +0900 |
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1 //===- lib/Support/ErrorHandling.cpp - Callbacks for errors ---------------===// |
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2 // |
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3 // The LLVM Compiler Infrastructure |
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4 // |
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5 // This file is distributed under the University of Illinois Open Source |
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6 // License. See LICENSE.TXT for details. |
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7 // |
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8 //===----------------------------------------------------------------------===// |
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9 // |
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10 // This file defines an API used to indicate fatal error conditions. Non-fatal |
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11 // errors (most of them) should be handled through LLVMContext. |
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12 // |
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13 //===----------------------------------------------------------------------===// |
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14 |
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15 #include "llvm/Support/ErrorHandling.h" |
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16 #include "llvm/ADT/SmallVector.h" |
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17 #include "llvm/ADT/Twine.h" |
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18 #include "llvm/Config/config.h" |
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19 #include "llvm/Support/Debug.h" |
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20 #include "llvm/Support/Signals.h" |
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21 #include "llvm/Support/Threading.h" |
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22 #include "llvm/Support/raw_ostream.h" |
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23 #include <cassert> |
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24 #include <cstdlib> |
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25 |
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26 #if defined(HAVE_UNISTD_H) |
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27 # include <unistd.h> |
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28 #endif |
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29 #if defined(_MSC_VER) |
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30 # include <io.h> |
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31 # include <fcntl.h> |
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32 #endif |
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33 |
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34 using namespace llvm; |
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35 |
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36 static fatal_error_handler_t ErrorHandler = 0; |
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37 static void *ErrorHandlerUserData = 0; |
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38 |
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39 void llvm::install_fatal_error_handler(fatal_error_handler_t handler, |
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40 void *user_data) { |
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41 assert(!llvm_is_multithreaded() && |
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42 "Cannot register error handlers after starting multithreaded mode!\n"); |
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43 assert(!ErrorHandler && "Error handler already registered!\n"); |
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44 ErrorHandler = handler; |
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45 ErrorHandlerUserData = user_data; |
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46 } |
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47 |
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48 void llvm::remove_fatal_error_handler() { |
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49 ErrorHandler = 0; |
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50 } |
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51 |
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52 void llvm::report_fatal_error(const char *Reason, bool GenCrashDiag) { |
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53 report_fatal_error(Twine(Reason), GenCrashDiag); |
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54 } |
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55 |
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56 void llvm::report_fatal_error(const std::string &Reason, bool GenCrashDiag) { |
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57 report_fatal_error(Twine(Reason), GenCrashDiag); |
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58 } |
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59 |
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60 void llvm::report_fatal_error(StringRef Reason, bool GenCrashDiag) { |
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61 report_fatal_error(Twine(Reason), GenCrashDiag); |
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62 } |
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63 |
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64 void llvm::report_fatal_error(const Twine &Reason, bool GenCrashDiag) { |
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65 if (ErrorHandler) { |
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66 ErrorHandler(ErrorHandlerUserData, Reason.str(), GenCrashDiag); |
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67 } else { |
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68 // Blast the result out to stderr. We don't try hard to make sure this |
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69 // succeeds (e.g. handling EINTR) and we can't use errs() here because |
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70 // raw ostreams can call report_fatal_error. |
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71 SmallVector<char, 64> Buffer; |
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72 raw_svector_ostream OS(Buffer); |
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73 OS << "LLVM ERROR: " << Reason << "\n"; |
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74 StringRef MessageStr = OS.str(); |
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75 ssize_t written = ::write(2, MessageStr.data(), MessageStr.size()); |
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76 (void)written; // If something went wrong, we deliberately just give up. |
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77 } |
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78 |
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79 // If we reached here, we are failing ungracefully. Run the interrupt handlers |
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80 // to make sure any special cleanups get done, in particular that we remove |
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81 // files registered with RemoveFileOnSignal. |
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82 sys::RunInterruptHandlers(); |
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83 |
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84 exit(1); |
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85 } |
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86 |
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87 void llvm::llvm_unreachable_internal(const char *msg, const char *file, |
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88 unsigned line) { |
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89 // This code intentionally doesn't call the ErrorHandler callback, because |
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90 // llvm_unreachable is intended to be used to indicate "impossible" |
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91 // situations, and not legitimate runtime errors. |
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92 if (msg) |
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93 dbgs() << msg << "\n"; |
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94 dbgs() << "UNREACHABLE executed"; |
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95 if (file) |
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96 dbgs() << " at " << file << ":" << line; |
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97 dbgs() << "!\n"; |
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98 abort(); |
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99 } |