+/*
+ * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Redis nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
#include "redis.h"
#include "sha1.h" /* SHA1 is used for DEBUG DIGEST */
void debugCommand(redisClient *c) {
if (!strcasecmp(c->argv[1]->ptr,"segfault")) {
*((char*)-1) = 'x';
+ } else if (!strcasecmp(c->argv[1]->ptr,"oom")) {
+ void *ptr = zmalloc(ULONG_MAX); /* Should trigger an out of memory. */
+ zfree(ptr);
+ addReply(c,shared.ok);
} else if (!strcasecmp(c->argv[1]->ptr,"assert")) {
if (c->argc >= 3) c->argv[2] = tryObjectEncoding(c->argv[2]);
redisAssertWithInfo(c,c->argv[0],1 == 2);
}
}
+#if defined(HAVE_PROC_MAPS)
+int memtest_non_destructive(void *addr, size_t size); /* memtest.c */
+
+int memtest_test_linux_anonymous_maps(void) {
+ FILE *fp = fopen("/proc/self/maps","r");
+ char line[1024];
+ size_t start_addr, end_addr, size;
+
+ while(fgets(line,sizeof(line),fp) != NULL) {
+ char *start, *end, *p = line;
+ int j;
+
+ start = p;
+ p = strchr(p,'-');
+ if (!p) continue;
+ *p++ = '\0';
+ end = p;
+ p = strchr(p,' ');
+ if (!p) continue;
+ *p++ = '\0';
+ if (strstr(p,"stack") ||
+ strstr(p,"vdso") ||
+ strstr(p,"vsyscall")) continue;
+ if (!strstr(p,"00:00")) continue;
+ if (!strstr(p,"rw")) continue;
+
+ start_addr = strtoul(start,NULL,16);
+ end_addr = strtoul(end,NULL,16);
+ size = end_addr-start_addr;
+ redisLog(REDIS_WARNING,
+ "Testing memory at %lx (%lu bytes)", start_addr, size);
+ for (j = 0; j < 3; j++) {
+ if (memtest_non_destructive((void*)start_addr,size) != 0) {
+ fclose(fp);
+ return 1;
+ }
+ }
+ }
+ fclose(fp);
+ return 0;
+}
+#endif
+
void sigsegvHandler(int sig, siginfo_t *info, void *secret) {
ucontext_t *uc = (ucontext_t*) secret;
sds infostring, clients;
/* Log dump of processor registers */
logRegisters(uc);
+#if defined(HAVE_PROC_MAPS)
+ /* Test memory */
+ redisLog(REDIS_WARNING, "--- FAST MEMORY TEST");
+ bioKillThreads();
+ if (memtest_test_linux_anonymous_maps()) {
+ redisLog(REDIS_WARNING,
+ "!!! MEMORY ERROR DETECTED! Check your memory ASAP !!!");
+ } else {
+ redisLog(REDIS_WARNING,
+ "Fast memory test PASSED, however your memory can still be broken. Please run a memory test for several hours if possible.");
+ }
+#endif
+
redisLog(REDIS_WARNING,
"\n=== REDIS BUG REPORT END. Make sure to include from START to END. ===\n\n"
" Please report the crash opening an issue on github:\n\n"
}
#endif /* HAVE_BACKTRACE */
+/* ==================== Logging functions for debugging ===================== */
+
+void redisLogHexDump(int level, char *descr, void *value, size_t len) {
+ char buf[65], *b;
+ unsigned char *v = value;
+ char charset[] = "0123456789abcdef";
+
+ redisLog(level,"%s (hexdump):", descr);
+ b = buf;
+ while(len) {
+ b[0] = charset[(*v)>>4];
+ b[1] = charset[(*v)&0xf];
+ b[2] = '\0';
+ b += 2;
+ len--;
+ v++;
+ if (b-buf == 64 || len == 0) {
+ redisLogRaw(level|REDIS_LOG_RAW,buf);
+ b = buf;
+ }
+ }
+ redisLogRaw(level|REDIS_LOG_RAW,"\n");
+}
+
/* =========================== Software Watchdog ============================ */
#include <sys/time.h>
/* Enable the software watchdong with the specified period in milliseconds. */
void enableWatchdog(int period) {
+ int min_period;
+
if (server.watchdog_period == 0) {
struct sigaction act;
act.sa_sigaction = watchdogSignalHandler;
sigaction(SIGALRM, &act, NULL);
}
- if (period < 200) period = 200; /* We don't accept periods < 200 ms. */
+ /* If the configured period is smaller than twice the timer period, it is
+ * too short for the software watchdog to work reliably. Fix it now
+ * if needed. */
+ min_period = (1000/REDIS_HZ)*2;
+ if (period < min_period) period = min_period;
watchdogScheduleSignal(period); /* Adjust the current timer. */
server.watchdog_period = period;
}
projects / redis.git / blobdiff