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authorDenis V. Lunev <den@openvz.org>2016-01-07 16:55:29 +0300
committerStefan Hajnoczi <stefanha@redhat.com>2016-02-03 09:19:10 +0000
commitd890d50d1821a18366a0b9f72e6c93689a47bcd4 (patch)
treebdb3a3ded7f1fc88d63e8fdf294979412b2e0061 /util/log.c
parent508127e243122cf3ed67d2aaa472a1b4f1be055e (diff)
log: move qemu-log.c into util/ directory
log will become common facility with tracepoints support in next step. Signed-off-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1452174932-28657-9-git-send-email-den@openvz.org Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'util/log.c')
-rw-r--r--util/log.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/util/log.c b/util/log.c
new file mode 100644
index 0000000000..901b93087d
--- /dev/null
+++ b/util/log.c
@@ -0,0 +1,179 @@
+/*
+ * 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-common.h"
+#include "qemu/log.h"
+
+static char *logfilename;
+FILE *qemu_logfile;
+int qemu_loglevel;
+static int log_append = 0;
+
+void qemu_log(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ if (qemu_logfile) {
+ vfprintf(qemu_logfile, fmt, ap);
+ }
+ va_end(ap);
+}
+
+void qemu_log_mask(int mask, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ if ((qemu_loglevel & mask) && 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;
+ if (qemu_loglevel && !qemu_logfile) {
+ if (logfilename) {
+ qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
+ if (!qemu_logfile) {
+ perror(logfilename);
+ _exit(1);
+ }
+ } else {
+ /* Default to stderr if no log file specified */
+ 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_loglevel && qemu_logfile) {
+ qemu_log_close();
+ }
+}
+
+void qemu_set_log_filename(const char *filename)
+{
+ g_free(logfilename);
+ logfilename = g_strdup(filename);
+ qemu_log_close();
+ qemu_set_log(qemu_loglevel);
+}
+
+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 state before block translation" },
+ { 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;
+ }
+ } 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, "%-10s %s\n", item->name, item->help);
+ }
+}