* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
+ * Copyright (C) 2007,2008 Øyvind Harboe *
+ * oyvind.harboe@zylin.com *
+ * *
+ * Copyright (C) 2008 by Spencer Oliver *
+ * spen@spen-soft.co.uk *
+ * *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
#include "config.h"
#endif
-#include "log.h"
-#include "configuration.h"
+#include "time_support.h"
+// @todo the inclusion of server.h here is a layering violation
+#include <server/server.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
#include <stdarg.h>
+#ifdef _DEBUG_FREE_SPACE_
+#ifdef HAVE_MALLOC_H
+#include <malloc.h>
+#else
+#error "malloc.h is required to use --enable-malloc-logging"
+#endif
+#endif
+
int debug_level = -1;
static FILE* log_output;
+static struct log_callback *log_callbacks = NULL;
-static char *log_strings[4] =
+static long long last_time;
+static long long current_time;
+
+static long long start;
+
+static char *log_strings[5] =
{
- "Error: ",
- "Warning:",
- "Info: ",
- "Debug: ",
+ "User : ",
+ "Error: ",
+ "Warn : ", /* want a space after each colon, all same width, colons aligned */
+ "Info : ",
+ "Debug: "
};
-void log_printf(enum log_levels level, const char *file, int line, const char *function, const char *format, ...)
+
+static int count = 0;
+
+
+static struct store_log_forward * log_head = NULL;
+static int log_forward_count = 0;
+
+struct store_log_forward
{
- va_list args;
- char buffer[512];
+ struct store_log_forward * next;
+ const char * file;
+ int line;
+ const char * function;
+ const char * string;
+};
- if (level > debug_level)
+/* either forward the log to the listeners or store it for possible forwarding later */
+static void log_forward(const char *file, unsigned line, const char *function, const char *string)
+{
+ if (log_forward_count==0)
+ {
+ struct log_callback *cb, *next;
+ cb = log_callbacks;
+ /* DANGER!!!! the log callback can remove itself!!!! */
+ while (cb)
+ {
+ next = cb->next;
+ cb->fn(cb->priv, file, line, function, string);
+ cb = next;
+ }
+ } else
+ {
+ struct store_log_forward *log = malloc(sizeof (struct store_log_forward));
+ log->file = strdup(file);
+ log->line = line;
+ log->function = strdup(function);
+ log->string = strdup(string);
+ log->next = NULL;
+ if (log_head==NULL)
+ log_head = log;
+ else
+ {
+ /* append to tail */
+ struct store_log_forward * t;
+ t = log_head;
+ while (t->next!=NULL)
+ {
+ t = t->next;
+ }
+ t->next = log;
+ }
+ }
+}
+
+/* The log_puts() serves to somewhat different goals:
+ *
+ * - logging
+ * - feeding low-level info to the user in GDB or Telnet
+ *
+ * The latter dictates that strings without newline are not logged, lest there
+ * will be *MANY log lines when sending one char at the time(e.g.
+ * target_request.c).
+ *
+ */
+static void log_puts(enum log_levels level, const char *file, int line, const char *function, const char *string)
+{
+ char *f;
+ if (level == LOG_LVL_OUTPUT)
+ {
+ /* do not prepend any headers, just print out what we were given and return */
+ fputs(string, log_output);
+ fflush(log_output);
return;
+ }
+
+ f = strrchr(file, '/');
+ if (f != NULL)
+ file = f + 1;
- va_start(args, format);
- vsnprintf(buffer, 512, format, args);
+ if (strlen(string) > 0)
+ {
+ if (debug_level >= LOG_LVL_DEBUG)
+ {
+ /* print with count and time information */
+ int t = (int)(timeval_ms()-start);
+#ifdef _DEBUG_FREE_SPACE_
+ struct mallinfo info;
+ info = mallinfo();
+#endif
+ fprintf(log_output, "%s%d %d %s:%d %s()"
+#ifdef _DEBUG_FREE_SPACE_
+ " %d"
+#endif
+ ": %s", log_strings[level + 1], count, t, file, line, function,
+#ifdef _DEBUG_FREE_SPACE_
+ info.fordblks,
+#endif
+ string);
+ }
+ else if (server_use_pipes == 0)
+ {
+ /* if we are using gdb through pipes then we do not want any output
+ * to the pipe otherwise we get repeated strings */
+ fprintf(log_output, "%s%s",
+ (level > LOG_LVL_USER)?log_strings[level + 1]:"", string);
+ }
+ } else
+ {
+ /* Empty strings are sent to log callbacks to keep e.g. gdbserver alive, here we do nothing. */
+ }
- fprintf(log_output, "%s %s:%d %s(): %s\n", log_strings[level], file, line, function, buffer);
fflush(log_output);
-
- va_end(args);
+
+ /* Never forward LOG_LVL_DEBUG, too verbose and they can be found in the log if need be */
+ if (level <= LOG_LVL_INFO)
+ {
+ log_forward(file, line, function, string);
+ }
}
-void short_log_printf(enum log_levels level, const char *format, ...)
+
+void log_printf(enum log_levels level, const char *file, unsigned line, const char *function, const char *format, ...)
{
- va_list args;
- char buffer[512];
+ char *string;
+ va_list ap;
+ count++;
if (level > debug_level)
return;
- va_start(args, format);
- vsnprintf(buffer, 512, format, args);
+ va_start(ap, format);
- fprintf(log_output, "%s %s\n", log_strings[level], buffer);
- fflush(log_output);
+ string = alloc_vprintf(format, ap);
+ if (string != NULL)
+ {
+ log_puts(level, file, line, function, string);
+ free(string);
+ }
+
+ va_end(ap);
+}
+
+void log_printf_lf(enum log_levels level, const char *file, unsigned line, const char *function, const char *format, ...)
+{
+ char *string;
+ va_list ap;
+
+ count++;
+ if (level > debug_level)
+ return;
+
+ va_start(ap, format);
+
+ string = alloc_vprintf(format, ap);
+ if (string != NULL)
+ {
+ strcat(string, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one char longer */
+ log_puts(level, file, line, function, string);
+ free(string);
+ }
- va_end(args);
+ va_end(ap);
}
/* change the current debug level on the fly
* 2: + INFORMATIONAL MSGS
* 3: + DEBUG MSGS
*/
-int handle_debug_level_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_debug_level_command)
{
- if (argc == 0)
- command_print(cmd_ctx, "debug_level: %i", debug_level);
-
- if (argc > 0)
- debug_level = strtoul(args[0], NULL, 0);
+ if (CMD_ARGC == 1)
+ {
+ unsigned new_level;
+ COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], new_level);
+ debug_level = MIN(new_level, LOG_LVL_DEBUG);
+ }
+ else if (CMD_ARGC > 1)
+ return ERROR_COMMAND_SYNTAX_ERROR;
- if (debug_level < 0)
- debug_level = 0;
+ if (debug_level >= LOG_LVL_DEBUG && server_use_pipes == 1)
+ {
+ /* if we are enabling debug info then we need to write to a
+ * log file otherwise the pipe will get full and cause issues
+ * with gdb
+ */
+ FILE* file = fopen("openocd.log", "w");
+ if (file)
+ {
+ log_output = file;
+ LOG_WARNING("enabling logfile output because "
+ "we are using pipes to talk to GDB.");
+ }
+ }
- if (debug_level > 3)
- debug_level = 3;
+ command_print(CMD_CTX, "debug_level: %i", debug_level);
return ERROR_OK;
}
-int handle_log_output_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_log_output_command)
{
- if (argc == 1)
+ if (CMD_ARGC == 1)
{
- FILE* file = fopen(args[0], "w");
-
+ FILE* file = fopen(CMD_ARGV[0], "w");
+
if (file)
{
log_output = file;
return ERROR_OK;
}
-int log_register_commands(struct command_context_s *cmd_ctx)
-{
- register_command(cmd_ctx, NULL, "log_output", handle_log_output_command,
- COMMAND_ANY, "redirect logging to <file> (default: stderr)");
- register_command(cmd_ctx, NULL, "debug_level", handle_debug_level_command,
- COMMAND_ANY, "adjust debug level <0-3>");
+static struct command_registration log_command_handlers[] = {
+ {
+ .name = "log_output",
+ .handler = handle_log_output_command,
+ .mode = COMMAND_ANY,
+ .help = "redirect logging to a file (default: stderr)",
+ .usage = "file_name",
+ },
+ {
+ .name = "debug_level",
+ .handler = handle_debug_level_command,
+ .mode = COMMAND_ANY,
+ .help = "Sets the verbosity level of debugging output. "
+ "0 shows errors only; 1 adds warnings; "
+ "2 (default) adds other info; 3 adds debugging.",
+ .usage = "number",
+ },
+ COMMAND_REGISTRATION_DONE
+};
- return ERROR_OK;
+int log_register_commands(struct command_context *cmd_ctx)
+{
+ return register_commands(cmd_ctx, NULL, log_command_handlers);
}
-int log_init(struct command_context_s *cmd_ctx)
+void log_init(void)
{
- /* set defaults for daemon configuration, if not set by cmdline or cfgfile */
+ /* set defaults for daemon configuration,
+ * if not set by cmdline or cfgfile */
if (debug_level == -1)
- debug_level = LOG_INFO;
-
- if (log_output == NULL)
+ debug_level = LOG_LVL_INFO;
+
+ char *debug_env = getenv("OPENOCD_DEBUG_LEVEL");
+ if (NULL != debug_env)
{
+ int value;
+ int retval = parse_int(debug_env, &value);
+ if (ERROR_OK == retval &&
+ debug_level >= LOG_LVL_SILENT &&
+ debug_level <= LOG_LVL_DEBUG)
+ {
+ debug_level = value;
+ }
+ }
+
+ if (log_output == NULL)
log_output = stderr;
+
+ start = last_time = timeval_ms();
+}
+
+int set_log_output(struct command_context *cmd_ctx, FILE *output)
+{
+ log_output = output;
+ return ERROR_OK;
+}
+
+/* add/remove log callback handler */
+int log_add_callback(log_callback_fn fn, void *priv)
+{
+ struct log_callback *cb;
+
+ /* prevent the same callback to be registered more than once, just for sure */
+ for (cb = log_callbacks; cb; cb = cb->next)
+ {
+ if (cb->fn == fn && cb->priv == priv)
+ return ERROR_INVALID_ARGUMENTS;
}
-
+
+ /* alloc memory, it is safe just to return in case of an error, no need for the caller to check this */
+ if ((cb = malloc(sizeof(struct log_callback))) == NULL)
+ return ERROR_BUF_TOO_SMALL;
+
+ /* add item to the beginning of the linked list */
+ cb->fn = fn;
+ cb->priv = priv;
+ cb->next = log_callbacks;
+ log_callbacks = cb;
+
return ERROR_OK;
}
+
+int log_remove_callback(log_callback_fn fn, void *priv)
+{
+ struct log_callback *cb, **p;
+
+ for (p = &log_callbacks; (cb = *p); p = &(*p)->next)
+ {
+ if (cb->fn == fn && cb->priv == priv)
+ {
+ *p = cb->next;
+ free(cb);
+ return ERROR_OK;
+ }
+ }
+
+ /* no such item */
+ return ERROR_INVALID_ARGUMENTS;
+}
+
+/* return allocated string w/printf() result */
+char *alloc_vprintf(const char *fmt, va_list ap)
+{
+ va_list ap_copy;
+ int len;
+ char *string;
+
+ /* determine the length of the buffer needed */
+ va_copy(ap_copy, ap);
+ len = vsnprintf(NULL, 0, fmt, ap_copy);
+ va_end(ap_copy);
+
+ /* allocate and make room for terminating zero. */
+ /* FIXME: The old version always allocated at least one byte extra and
+ * other code depend on that. They should be probably be fixed, but for
+ * now reserve the extra byte. */
+ string = malloc(len + 2);
+ if (string == NULL)
+ return NULL;
+
+ /* do the real work */
+ vsnprintf(string, len + 1, fmt, ap);
+
+ return string;
+}
+
+char *alloc_printf(const char *format, ...)
+{
+ char *string;
+ va_list ap;
+ va_start(ap, format);
+ string = alloc_vprintf(format, ap);
+ va_end(ap);
+ return string;
+}
+
+/* Code must return to the server loop before 1000ms has returned or invoke
+ * this function.
+ *
+ * The GDB connection will time out if it spends >2000ms and you'll get nasty
+ * error messages from GDB:
+ *
+ * Ignoring packet error, continuing...
+ * Reply contains invalid hex digit 116
+ *
+ * While it is possible use "set remotetimeout" to more than the default 2000ms
+ * in GDB, OpenOCD guarantees that it sends keep-alive packages on the
+ * GDB protocol and it is a bug in OpenOCD not to either return to the server
+ * loop or invoke keep_alive() every 1000ms.
+ *
+ * This function will send a keep alive packet if >500ms has passed since last time
+ * it was invoked.
+ *
+ * Note that this function can be invoked often, so it needs to be relatively
+ * fast when invoked more often than every 500ms.
+ *
+ */
+void keep_alive()
+{
+ current_time = timeval_ms();
+ if (current_time-last_time > 1000)
+ {
+ extern int gdb_actual_connections;
+
+ if (gdb_actual_connections)
+ LOG_WARNING("keep_alive() was not invoked in the "
+ "1000ms timelimit. GDB alive packet not "
+ "sent! (%lld). Workaround: increase "
+ "\"set remotetimeout\" in GDB",
+ current_time-last_time);
+ else
+ LOG_DEBUG("keep_alive() was not invoked in the "
+ "1000ms timelimit (%lld). This may cause "
+ "trouble with GDB connections.",
+ current_time-last_time);
+ }
+ if (current_time-last_time > 500)
+ {
+ /* this will keep the GDB connection alive */
+ LOG_USER_N("%s", "");
+
+ /* DANGER!!!! do not add code to invoke e.g. target event processing,
+ * jim timer processing, etc. it can cause infinite recursion +
+ * jim event callbacks need to happen at a well defined time,
+ * not anywhere keep_alive() is invoked.
+ *
+ * These functions should be invoked at a well defined spot in server.c
+ */
+
+ last_time = current_time;
+ }
+}
+
+/* reset keep alive timer without sending message */
+void kept_alive()
+{
+ current_time = timeval_ms();
+ last_time = current_time;
+}
+
+/* if we sleep for extended periods of time, we must invoke keep_alive() intermittantly */
+void alive_sleep(uint64_t ms)
+{
+ uint64_t napTime = 10;
+ for (uint64_t i = 0; i < ms; i += napTime)
+ {
+ uint64_t sleep_a_bit = ms - i;
+ if (sleep_a_bit > napTime)
+ sleep_a_bit = napTime;
+
+ usleep(sleep_a_bit * 1000);
+ keep_alive();
+ }
+}
+
+void busy_sleep(uint64_t ms)
+{
+ uint64_t then = timeval_ms();
+ while (timeval_ms() - then < ms)
+ {
+ /* busy wait */
+ }
+}