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25 * Copyright 1988-2001, NeXT Software, Inc., Apple Computer, Inc.
28 #include "objc-private.h"
34 void _objc_inform_on_crash(const char *fmt, ...)
38 void _objc_inform(const char *fmt, ...)
47 void _objc_fatal(const char *fmt, ...)
58 void __objc_error(id rcv, const char *fmt, ...)
68 void _objc_error(id rcv, const char *fmt, va_list args)
79 OBJC_EXPORT void (*_error)(id, const char *, va_list);
81 // Return true if c is a UTF8 continuation byte
82 static bool isUTF8Continuation(char c)
84 return (c & 0xc0) == 0x80; // continuation byte is 0b10xxxxxx
87 // Add "message" to any forthcoming crash log.
88 mutex_t crashlog_lock;
89 static void _objc_crashlog(const char *message)
95 // for debugging at BOOT time.
96 extern char **_NSGetProgname(void);
97 FILE *crashlog = fopen("/_objc_crash.log", "a");
98 setbuf(crashlog, NULL);
99 fprintf(crashlog, "[%s] %s\n", *_NSGetProgname(), message);
105 mutex_locker_t lock(crashlog_lock);
107 char *oldmsg = (char *)CRGetCrashLogMessage();
109 const size_t limit = 8000;
112 newmsg = strdup(message);
113 } else if ((oldlen = strlen(oldmsg)) > limit) {
114 // limit total length by dropping old contents
115 char *truncmsg = oldmsg + oldlen - limit;
116 // advance past partial UTF-8 bytes
117 while (isUTF8Continuation(*truncmsg)) truncmsg++;
118 asprintf(&newmsg, "... %s\n%s", truncmsg, message);
120 asprintf(&newmsg, "%s\n%s", oldmsg, message);
124 // Strip trailing newline
125 char *c = &newmsg[strlen(newmsg)-1];
126 if (*c == '\n') *c = '\0';
128 if (oldmsg) free(oldmsg);
129 CRSetCrashLogMessage(newmsg);
133 // Returns true if logs should be sent to stderr as well as syslog.
134 // Copied from CFUtilities.c
135 static bool also_do_stderr(void)
138 int ret = fstat(STDERR_FILENO, &st);
139 if (ret < 0) return false;
140 mode_t m = st.st_mode & S_IFMT;
141 if (m == S_IFREG || m == S_IFSOCK || m == S_IFIFO || m == S_IFCHR) {
147 // Print "message" to the console.
148 static void _objc_syslog(const char *message)
150 _simple_asl_log(ASL_LEVEL_ERR, nil, message);
152 if (also_do_stderr()) {
153 write(STDERR_FILENO, message, strlen(message));
158 * _objc_error is the default *_error handler.
161 // used by ExceptionHandling.framework
163 __attribute__((noreturn))
164 void _objc_error(id self, const char *fmt, va_list ap)
167 vasprintf(&buf, fmt, ap);
168 _objc_fatal("%s: %s", object_getClassName(self), buf);
172 * this routine handles errors that involve an object (or class).
174 void __objc_error(id rcv, const char *fmt, ...)
180 (*_error)(rcv, fmt, vp);
182 _objc_error (rcv, fmt, vp); /* In case (*_error)() returns. */
186 static __attribute__((noreturn))
187 void _objc_fatalv(uint64_t reason, uint64_t flags, const char *fmt, va_list ap)
190 vasprintf(&buf1, fmt, ap);
193 asprintf(&buf2, "objc[%d]: %s\n", getpid(), buf1);
196 if (DebugDontCrash) {
198 asprintf(&buf3, "objc[%d]: HALTED\n", getpid());
203 abort_with_reason(OS_REASON_OBJC, reason, buf1, flags);
207 void _objc_fatal_with_reason(uint64_t reason, uint64_t flags,
208 const char *fmt, ...)
212 _objc_fatalv(reason, flags, fmt, ap);
215 void _objc_fatal(const char *fmt, ...)
219 _objc_fatalv(OBJC_EXIT_REASON_UNSPECIFIED,
220 OS_REASON_FLAG_ONE_TIME_FAILURE,
225 * this routine handles soft runtime errors...like not being able
226 * add a category to a class (because it wasn't linked in).
228 void _objc_inform(const char *fmt, ...)
235 vasprintf(&buf1, fmt, ap);
238 asprintf(&buf2, "objc[%d]: %s\n", getpid(), buf1);
247 * Like _objc_inform(), but prints the message only in any
248 * forthcoming crash log, not to the console.
250 void _objc_inform_on_crash(const char *fmt, ...)
257 vasprintf(&buf1, fmt, ap);
260 asprintf(&buf2, "objc[%d]: %s\n", getpid(), buf1);
261 _objc_crashlog(buf2);
269 * Like calling both _objc_inform and _objc_inform_on_crash.
271 void _objc_inform_now_and_on_crash(const char *fmt, ...)
278 vasprintf(&buf1, fmt, ap);
281 asprintf(&buf2, "objc[%d]: %s\n", getpid(), buf1);
282 _objc_crashlog(buf2);
293 void _objc_warn_deprecated(void)
296 void _objc_inform_deprecated(const char *oldf, const char *newf)
298 if (PrintDeprecation) {
300 _objc_inform("The function %s is obsolete. Use %s instead. Set a breakpoint on _objc_warn_deprecated to find the culprit.", oldf, newf);
302 _objc_inform("The function %s is obsolete. Do not use it. Set a breakpoint on _objc_warn_deprecated to find the culprit.", oldf);
305 _objc_warn_deprecated();