--- /dev/null
+/*
+ * Logging support
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qemu/log.h"
+#include "qemu/range.h"
+#include "qemu/error-report.h"
+#include "qemu/cutils.h"
+#include "trace/control.h"
+
+static char *logfilename;
+FILE *qemu_logfile;
+int qemu_loglevel;
+static int log_append = 0;
+static GArray *debug_regions;
+
+void qemu_log(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ if (qemu_logfile) {
+ vfprintf(qemu_logfile, fmt, ap);
+ }
+ va_end(ap);
+}
+
+/* enable or disable low levels log */
+void do_qemu_set_log(int log_flags, bool use_own_buffers)
+{
+ qemu_loglevel = log_flags;
+#ifdef CONFIG_TRACE_LOG
+ qemu_loglevel |= LOG_TRACE;
+#endif
+ if (!qemu_logfile &&
+ (is_daemonized() ? logfilename != NULL : qemu_loglevel)) {
+ if (logfilename) {
+ qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
+ if (!qemu_logfile) {
+ perror(logfilename);
+ _exit(1);
+ }
+ /* In case we are a daemon redirect stderr to logfile */
+ if (is_daemonized()) {
+ dup2(fileno(qemu_logfile), STDERR_FILENO);
+ fclose(qemu_logfile);
+ /* This will skip closing logfile in qemu_log_close() */
+ qemu_logfile = stderr;
+ }
+ } else {
+ /* Default to stderr if no log file specified */
+ assert(!is_daemonized());
+ qemu_logfile = stderr;
+ }
+ /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
+ if (use_own_buffers) {
+ static char logfile_buf[4096];
+
+ setvbuf(qemu_logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
+ } else {
+#if defined(_WIN32)
+ /* Win32 doesn't support line-buffering, so use unbuffered output. */
+ setvbuf(qemu_logfile, NULL, _IONBF, 0);
+#else
+ setvbuf(qemu_logfile, NULL, _IOLBF, 0);
+#endif
+ log_append = 1;
+ }
+ }
+ if (qemu_logfile &&
+ (is_daemonized() ? logfilename == NULL : !qemu_loglevel)) {
+ qemu_log_close();
+ }
+}
+/*
+ * Allow the user to include %d in their logfile which will be
+ * substituted with the current PID. This is useful for debugging many
+ * nested linux-user tasks but will result in lots of logs.
+ */
+void qemu_set_log_filename(const char *filename)
+{
+ char *pidstr;
+ g_free(logfilename);
+
+ pidstr = strstr(filename, "%");
+ if (pidstr) {
+ /* We only accept one %d, no other format strings */
+ if (pidstr[1] != 'd' || strchr(pidstr + 2, '%')) {
+ error_report("Bad logfile format: %s", filename);
+ logfilename = NULL;
+ } else {
+ logfilename = g_strdup_printf(filename, getpid());
+ }
+ } else {
+ logfilename = g_strdup(filename);
+ }
+ qemu_log_close();
+ qemu_set_log(qemu_loglevel);
+}
+
+/* Returns true if addr is in our debug filter or no filter defined
+ */
+bool qemu_log_in_addr_range(uint64_t addr)
+{
+ if (debug_regions) {
+ int i = 0;
+ for (i = 0; i < debug_regions->len; i++) {
+ struct Range *range = &g_array_index(debug_regions, Range, i);
+ if (addr >= range->begin && addr <= range->end) {
+ return true;
+ }
+ }
+ return false;
+ } else {
+ return true;
+ }
+}
+
+
+void qemu_set_dfilter_ranges(const char *filter_spec)
+{
+ gchar **ranges = g_strsplit(filter_spec, ",", 0);
+ if (ranges) {
+ gchar **next = ranges;
+ gchar *r = *next++;
+ debug_regions = g_array_sized_new(FALSE, FALSE,
+ sizeof(Range), g_strv_length(ranges));
+ while (r) {
+ char *range_op = strstr(r, "-");
+ char *r2 = range_op ? range_op + 1 : NULL;
+ if (!range_op) {
+ range_op = strstr(r, "+");
+ r2 = range_op ? range_op + 1 : NULL;
+ }
+ if (!range_op) {
+ range_op = strstr(r, "..");
+ r2 = range_op ? range_op + 2 : NULL;
+ }
+ if (range_op) {
+ const char *e = NULL;
+ uint64_t r1val, r2val;
+
+ if ((qemu_strtoull(r, &e, 0, &r1val) == 0) &&
+ (qemu_strtoull(r2, NULL, 0, &r2val) == 0) &&
+ r2val > 0) {
+ struct Range range;
+
+ g_assert(e == range_op);
+
+ switch (*range_op) {
+ case '+':
+ {
+ range.begin = r1val;
+ range.end = r1val + (r2val - 1);
+ break;
+ }
+ case '-':
+ {
+ range.end = r1val;
+ range.begin = r1val - (r2val - 1);
+ break;
+ }
+ case '.':
+ range.begin = r1val;
+ range.end = r2val;
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ g_array_append_val(debug_regions, range);
+
+ } else {
+ g_error("Failed to parse range in: %s", r);
+ }
+ } else {
+ g_error("Bad range specifier in: %s", r);
+ }
+ r = *next++;
+ }
+ g_strfreev(ranges);
+ }
+}
+
+/* fflush() the log file */
+void qemu_log_flush(void)
+{
+ fflush(qemu_logfile);
+}
+
+/* Close the log file */
+void qemu_log_close(void)
+{
+ if (qemu_logfile) {
+ if (qemu_logfile != stderr) {
+ fclose(qemu_logfile);
+ }
+ qemu_logfile = NULL;
+ }
+}
+
+const QEMULogItem qemu_log_items[] = {
+ { CPU_LOG_TB_OUT_ASM, "out_asm",
+ "show generated host assembly code for each compiled TB" },
+ { CPU_LOG_TB_IN_ASM, "in_asm",
+ "show target assembly code for each compiled TB" },
+ { CPU_LOG_TB_OP, "op",
+ "show micro ops for each compiled TB" },
+ { CPU_LOG_TB_OP_OPT, "op_opt",
+ "show micro ops (x86 only: before eflags optimization) and\n"
+ "after liveness analysis" },
+ { CPU_LOG_INT, "int",
+ "show interrupts/exceptions in short format" },
+ { CPU_LOG_EXEC, "exec",
+ "show trace before each executed TB (lots of logs)" },
+ { CPU_LOG_TB_CPU, "cpu",
+ "show CPU registers before entering a TB (lots of logs)" },
+ { CPU_LOG_MMU, "mmu",
+ "log MMU-related activities" },
+ { CPU_LOG_PCALL, "pcall",
+ "x86 only: show protected mode far calls/returns/exceptions" },
+ { CPU_LOG_RESET, "cpu_reset",
+ "show CPU state before CPU resets" },
+ { LOG_UNIMP, "unimp",
+ "log unimplemented functionality" },
+ { LOG_GUEST_ERROR, "guest_errors",
+ "log when the guest OS does something invalid (eg accessing a\n"
+ "non-existent register)" },
+ { CPU_LOG_PAGE, "page",
+ "dump pages at beginning of user mode emulation" },
+ { CPU_LOG_TB_NOCHAIN, "nochain",
+ "do not chain compiled TBs so that \"exec\" and \"cpu\" show\n"
+ "complete traces" },
+ { 0, NULL, NULL },
+};
+
+static int cmp1(const char *s1, int n, const char *s2)
+{
+ if (strlen(s2) != n) {
+ return 0;
+ }
+ return memcmp(s1, s2, n) == 0;
+}
+
+/* takes a comma separated list of log masks. Return 0 if error. */
+int qemu_str_to_log_mask(const char *str)
+{
+ const QEMULogItem *item;
+ int mask;
+ const char *p, *p1;
+
+ p = str;
+ mask = 0;
+ for (;;) {
+ p1 = strchr(p, ',');
+ if (!p1) {
+ p1 = p + strlen(p);
+ }
+ if (cmp1(p,p1-p,"all")) {
+ for (item = qemu_log_items; item->mask != 0; item++) {
+ mask |= item->mask;
+ }
+#ifdef CONFIG_TRACE_LOG
+ } else if (strncmp(p, "trace:", 6) == 0 && p + 6 != p1) {
+ trace_enable_events(p + 6);
+ mask |= LOG_TRACE;
+#endif
+ } else {
+ for (item = qemu_log_items; item->mask != 0; item++) {
+ if (cmp1(p, p1 - p, item->name)) {
+ goto found;
+ }
+ }
+ return 0;
+ found:
+ mask |= item->mask;
+ }
+ if (*p1 != ',') {
+ break;
+ }
+ p = p1 + 1;
+ }
+ return mask;
+}
+
+void qemu_print_log_usage(FILE *f)
+{
+ const QEMULogItem *item;
+ fprintf(f, "Log items (comma separated):\n");
+ for (item = qemu_log_items; item->mask != 0; item++) {
+ fprintf(f, "%-15s %s\n", item->name, item->help);
+ }
+#ifdef CONFIG_TRACE_LOG
+ fprintf(f, "trace:PATTERN enable trace events\n");
+ fprintf(f, "\nUse \"-d trace:help\" to get a list of trace events.\n\n");
+#endif
+}
Code Review / kvmfornfv.git / blobdiff