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comparison lib/Support/ErrorHandling.cpp @ 3:9ad51c7bc036

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