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/ADT/SmallVector.h"
16 #include "llvm/ADT/Twine.h"
17 #include "llvm/Config/config.h"
18 #include "llvm/Support/Debug.h"
19 #include "llvm/Support/Errc.h"
20 #include "llvm/Support/WindowsError.h"
21 #include "llvm/Support/raw_ostream.h"
22 #include <cassert>
23 #include <cstdlib>
24
25 #if defined(HAVE_UNISTD_H)
26 # include <unistd.h>
27 #endif
28 #if defined(_MSC_VER)
29 # include <io.h>
30 # include <fcntl.h>
31 #endif
32
33 using namespace llvm;
34
report_fatal_error(const char * Reason,bool GenCrashDiag)35 void llvm::report_fatal_error(const char *Reason, bool GenCrashDiag) {
36 report_fatal_error(Twine(Reason), GenCrashDiag);
37 }
38
report_fatal_error(const std::string & Reason,bool GenCrashDiag)39 void llvm::report_fatal_error(const std::string &Reason, bool GenCrashDiag) {
40 report_fatal_error(Twine(Reason), GenCrashDiag);
41 }
42
report_fatal_error(StringRef Reason,bool GenCrashDiag)43 void llvm::report_fatal_error(StringRef Reason, bool GenCrashDiag) {
44 report_fatal_error(Twine(Reason), GenCrashDiag);
45 }
46
report_fatal_error(const Twine & Reason,bool GenCrashDiag)47 void llvm::report_fatal_error(const Twine &Reason, bool GenCrashDiag) {
48 // Blast the result out to stderr. We don't try hard to make sure this
49 // succeeds (e.g. handling EINTR) and we can't use errs() here because
50 // raw ostreams can call report_fatal_error.
51 SmallVector<char, 64> Buffer;
52 raw_svector_ostream OS(Buffer);
53 OS << "LLVM ERROR: " << Reason << "\n";
54 StringRef MessageStr = OS.str();
55 ssize_t written = ::write(2, MessageStr.data(), MessageStr.size());
56 (void)written; // If something went wrong, we deliberately just give up.
57
58 // If we reached here, we are failing ungracefully. Run the interrupt handlers
59 // to make sure any special cleanups get done, in particular that we remove
60 // files registered with RemoveFileOnSignal.
61 //sys::RunInterruptHandlers();
62
63 exit(1);
64 }
65
llvm_unreachable_internal(const char * msg,const char * file,unsigned line)66 void llvm::llvm_unreachable_internal(const char *msg, const char *file,
67 unsigned line) {
68 // This code intentionally doesn't call the ErrorHandler callback, because
69 // llvm_unreachable is intended to be used to indicate "impossible"
70 // situations, and not legitimate runtime errors.
71 abort();
72 #ifdef LLVM_BUILTIN_UNREACHABLE
73 // Windows systems and possibly others don't declare abort() to be noreturn,
74 // so use the unreachable builtin to avoid a Clang self-host warning.
75 LLVM_BUILTIN_UNREACHABLE;
76 #endif
77 }
78
79 #ifdef LLVM_ON_WIN32
80
81 #include <winerror.h>
82
83 // I'd rather not double the line count of the following.
84 #define MAP_ERR_TO_COND(x, y) \
85 case x: \
86 return make_error_code(errc::y)
87
mapWindowsError(unsigned EV)88 std::error_code llvm::mapWindowsError(unsigned EV) {
89 switch (EV) {
90 MAP_ERR_TO_COND(ERROR_ACCESS_DENIED, permission_denied);
91 MAP_ERR_TO_COND(ERROR_ALREADY_EXISTS, file_exists);
92 MAP_ERR_TO_COND(ERROR_BAD_UNIT, no_such_device);
93 MAP_ERR_TO_COND(ERROR_BUFFER_OVERFLOW, filename_too_long);
94 MAP_ERR_TO_COND(ERROR_BUSY, device_or_resource_busy);
95 MAP_ERR_TO_COND(ERROR_BUSY_DRIVE, device_or_resource_busy);
96 MAP_ERR_TO_COND(ERROR_CANNOT_MAKE, permission_denied);
97 MAP_ERR_TO_COND(ERROR_CANTOPEN, io_error);
98 MAP_ERR_TO_COND(ERROR_CANTREAD, io_error);
99 MAP_ERR_TO_COND(ERROR_CANTWRITE, io_error);
100 MAP_ERR_TO_COND(ERROR_CURRENT_DIRECTORY, permission_denied);
101 MAP_ERR_TO_COND(ERROR_DEV_NOT_EXIST, no_such_device);
102 MAP_ERR_TO_COND(ERROR_DEVICE_IN_USE, device_or_resource_busy);
103 MAP_ERR_TO_COND(ERROR_DIR_NOT_EMPTY, directory_not_empty);
104 MAP_ERR_TO_COND(ERROR_DIRECTORY, invalid_argument);
105 MAP_ERR_TO_COND(ERROR_DISK_FULL, no_space_on_device);
106 MAP_ERR_TO_COND(ERROR_FILE_EXISTS, file_exists);
107 MAP_ERR_TO_COND(ERROR_FILE_NOT_FOUND, no_such_file_or_directory);
108 MAP_ERR_TO_COND(ERROR_HANDLE_DISK_FULL, no_space_on_device);
109 MAP_ERR_TO_COND(ERROR_INVALID_ACCESS, permission_denied);
110 MAP_ERR_TO_COND(ERROR_INVALID_DRIVE, no_such_device);
111 MAP_ERR_TO_COND(ERROR_INVALID_FUNCTION, function_not_supported);
112 MAP_ERR_TO_COND(ERROR_INVALID_HANDLE, invalid_argument);
113 MAP_ERR_TO_COND(ERROR_INVALID_NAME, invalid_argument);
114 MAP_ERR_TO_COND(ERROR_LOCK_VIOLATION, no_lock_available);
115 MAP_ERR_TO_COND(ERROR_LOCKED, no_lock_available);
116 MAP_ERR_TO_COND(ERROR_NEGATIVE_SEEK, invalid_argument);
117 MAP_ERR_TO_COND(ERROR_NOACCESS, permission_denied);
118 MAP_ERR_TO_COND(ERROR_NOT_ENOUGH_MEMORY, not_enough_memory);
119 MAP_ERR_TO_COND(ERROR_NOT_READY, resource_unavailable_try_again);
120 MAP_ERR_TO_COND(ERROR_OPEN_FAILED, io_error);
121 MAP_ERR_TO_COND(ERROR_OPEN_FILES, device_or_resource_busy);
122 MAP_ERR_TO_COND(ERROR_OUTOFMEMORY, not_enough_memory);
123 MAP_ERR_TO_COND(ERROR_PATH_NOT_FOUND, no_such_file_or_directory);
124 MAP_ERR_TO_COND(ERROR_BAD_NETPATH, no_such_file_or_directory);
125 MAP_ERR_TO_COND(ERROR_READ_FAULT, io_error);
126 MAP_ERR_TO_COND(ERROR_RETRY, resource_unavailable_try_again);
127 MAP_ERR_TO_COND(ERROR_SEEK, io_error);
128 MAP_ERR_TO_COND(ERROR_SHARING_VIOLATION, permission_denied);
129 MAP_ERR_TO_COND(ERROR_TOO_MANY_OPEN_FILES, too_many_files_open);
130 MAP_ERR_TO_COND(ERROR_WRITE_FAULT, io_error);
131 MAP_ERR_TO_COND(ERROR_WRITE_PROTECT, permission_denied);
132 MAP_ERR_TO_COND(WSAEACCES, permission_denied);
133 MAP_ERR_TO_COND(WSAEBADF, bad_file_descriptor);
134 MAP_ERR_TO_COND(WSAEFAULT, bad_address);
135 MAP_ERR_TO_COND(WSAEINTR, interrupted);
136 MAP_ERR_TO_COND(WSAEINVAL, invalid_argument);
137 MAP_ERR_TO_COND(WSAEMFILE, too_many_files_open);
138 MAP_ERR_TO_COND(WSAENAMETOOLONG, filename_too_long);
139 default:
140 return std::error_code(EV, std::system_category());
141 }
142 }
143
144 #endif
145