Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' into staging

# gpg: Signature made Wed 03 Feb 2016 15:47:34 GMT using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/tracing-pull-request:
  log: add "-d trace:PATTERN"
  trace: switch default backend to "log"
  trace: convert stderr backend to log
  log: move qemu-log.c into util/ directory
  log: do not unnecessarily include qom/cpu.h
  trace: add "-trace help"
  trace: add "-trace enable=..."
  trace: no need to call trace_backend_init in different branches now
  trace: split trace_init_file out of trace_init_backends
  trace: split trace_init_events out of trace_init_backends
  trace: fix documentation
  trace: track enabled events in a separate array
  trace: count number of enabled events

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

.travis.yml

@@ -78,7 +78,7 @@ matrix:
       compiler: gcc
     # All the trace backends (apart from dtrace)
     - env: TARGETS=i386-softmmu,x86_64-softmmu
-           EXTRA_CONFIG="--enable-trace-backends=stderr"
+           EXTRA_CONFIG="--enable-trace-backends=log"
       compiler: gcc
     - env: TARGETS=i386-softmmu,x86_64-softmmu
            EXTRA_CONFIG="--enable-trace-backends=simple"

Makefile.objs

@@ -89,7 +89,6 @@ endif
 
 #######################################################################
 # Target-independent parts used in system and user emulation
-common-obj-y += qemu-log.o
 common-obj-y += tcg-runtime.o
 common-obj-y += hw/
 common-obj-y += qom/

bsd-user/main.c

@@ -33,6 +33,7 @@
 #include "tcg.h"
 #include "qemu/timer.h"
 #include "qemu/envlist.h"
+#include "exec/log.h"
 
 int singlestep;
 unsigned long mmap_min_addr;

configure

@@ -303,7 +303,7 @@ pkgversion=""
 pie=""
 zero_malloc=""
 qom_cast_debug="yes"
-trace_backends="nop"
+trace_backends="log"
 trace_file="trace"
 spice=""
 rbd=""
@@ -5445,8 +5445,8 @@ if have_backend "simple"; then
   # Set the appropriate trace file.
   trace_file="\"$trace_file-\" FMT_pid"
 fi
-if have_backend "stderr"; then
-  echo "CONFIG_TRACE_STDERR=y" >> $config_host_mak
+if have_backend "log"; then
+  echo "CONFIG_TRACE_LOG=y" >> $config_host_mak
 fi
 if have_backend "ust"; then
   echo "CONFIG_TRACE_UST=y" >> $config_host_mak

cpu-exec.c

@@ -27,6 +27,7 @@
 #include "exec/address-spaces.h"
 #include "qemu/rcu.h"
 #include "exec/tb-hash.h"
+#include "exec/log.h"
 #if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY)
 #include "hw/i386/apic.h"
 #endif

exec.c

@@ -52,6 +52,7 @@
 
 #include "exec/memory-internal.h"
 #include "exec/ram_addr.h"
+#include "exec/log.h"
 
 #include "qemu/range.h"
 #ifndef _WIN32

hw/acpi/cpu_hotplug.c

@@ -12,6 +12,7 @@
 #include "qemu/osdep.h"
 #include "hw/hw.h"
 #include "hw/acpi/cpu_hotplug.h"
+#include "qom/cpu.h"
 
 static uint64_t cpu_status_read(void *opaque, hwaddr addr, unsigned int size)
 {

hw/timer/a9gtimer.c

@@ -25,6 +25,7 @@
 #include "qemu/timer.h"
 #include "qemu/bitops.h"
 #include "qemu/log.h"
+#include "qom/cpu.h"
 
 #ifndef A9_GTIMER_ERR_DEBUG
 #define A9_GTIMER_ERR_DEBUG 0

include/exec/log.h

@@ -0,0 +1,60 @@
+#ifndef QEMU_EXEC_LOG_H
+#define QEMU_EXEC_LOG_H
+
+#include "qemu/log.h"
+#include "qom/cpu.h"
+#include "disas/disas.h"
+
+/* cpu_dump_state() logging functions: */
+/**
+ * log_cpu_state:
+ * @cpu: The CPU whose state is to be logged.
+ * @flags: Flags what to log.
+ *
+ * Logs the output of cpu_dump_state().
+ */
+static inline void log_cpu_state(CPUState *cpu, int flags)
+{
+    if (qemu_log_enabled()) {
+        cpu_dump_state(cpu, qemu_logfile, fprintf, flags);
+    }
+}
+
+/**
+ * log_cpu_state_mask:
+ * @mask: Mask when to log.
+ * @cpu: The CPU whose state is to be logged.
+ * @flags: Flags what to log.
+ *
+ * Logs the output of cpu_dump_state() if loglevel includes @mask.
+ */
+static inline void log_cpu_state_mask(int mask, CPUState *cpu, int flags)
+{
+    if (qemu_loglevel & mask) {
+        log_cpu_state(cpu, flags);
+    }
+}
+
+#ifdef NEED_CPU_H
+/* disas() and target_disas() to qemu_logfile: */
+static inline void log_target_disas(CPUState *cpu, target_ulong start,
+                                    target_ulong len, int flags)
+{
+    target_disas(qemu_logfile, cpu, start, len, flags);
+}
+
+static inline void log_disas(void *code, unsigned long size)
+{
+    disas(qemu_logfile, code, size);
+}
+
+#if defined(CONFIG_USER_ONLY)
+/* page_dump() output to the log file: */
+static inline void log_page_dump(void)
+{
+    page_dump(qemu_logfile);
+}
+#endif
+#endif
+
+#endif

include/qemu/log.h

@@ -5,10 +5,6 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include "qemu/compiler.h"
-#include "qom/cpu.h"
-#ifdef NEED_CPU_H
-#include "disas/disas.h"
-#endif
 
 /* Private global variables, don't use */
 extern FILE *qemu_logfile;
@@ -49,6 +45,7 @@ static inline bool qemu_log_separate(void)
 #define CPU_LOG_MMU        (1 << 12)
 #define CPU_LOG_TB_NOCHAIN (1 << 13)
 #define CPU_LOG_PAGE       (1 << 14)
+#define LOG_TRACE          (1 << 15)
 
 /* Returns true if a bit is set in the current loglevel mask
  */
@@ -78,61 +75,6 @@ qemu_log_vprintf(const char *fmt, va_list va)
 void GCC_FMT_ATTR(2, 3) qemu_log_mask(int mask, const char *fmt, ...);
 
 
-/* Special cases: */
-
-/* cpu_dump_state() logging functions: */
-/**
- * log_cpu_state:
- * @cpu: The CPU whose state is to be logged.
- * @flags: Flags what to log.
- *
- * Logs the output of cpu_dump_state().
- */
-static inline void log_cpu_state(CPUState *cpu, int flags)
-{
-    if (qemu_log_enabled()) {
-        cpu_dump_state(cpu, qemu_logfile, fprintf, flags);
-    }
-}
-
-/**
- * log_cpu_state_mask:
- * @mask: Mask when to log.
- * @cpu: The CPU whose state is to be logged.
- * @flags: Flags what to log.
- *
- * Logs the output of cpu_dump_state() if loglevel includes @mask.
- */
-static inline void log_cpu_state_mask(int mask, CPUState *cpu, int flags)
-{
-    if (qemu_loglevel & mask) {
-        log_cpu_state(cpu, flags);
-    }
-}
-
-#ifdef NEED_CPU_H
-/* disas() and target_disas() to qemu_logfile: */
-static inline void log_target_disas(CPUState *cpu, target_ulong start,
-                                    target_ulong len, int flags)
-{
-    target_disas(qemu_logfile, cpu, start, len, flags);
-}
-
-static inline void log_disas(void *code, unsigned long size)
-{
-    disas(qemu_logfile, code, size);
-}
-
-#if defined(CONFIG_USER_ONLY)
-/* page_dump() output to the log file: */
-static inline void log_page_dump(void)
-{
-    page_dump(qemu_logfile);
-}
-#endif
-#endif
-
-
 /* Maintenance: */
 
 /* fflush() the log file */

linux-user/main.c

@@ -28,6 +28,7 @@
 #include "qemu/timer.h"
 #include "qemu/envlist.h"
 #include "elf.h"
+#include "exec/log.h"
 
 char *exec_path;
 

qemu-io.c

@@ -435,7 +435,7 @@ int main(int argc, char **argv)
             }
             break;
         case 'T':
-            if (!trace_init_backends(optarg, NULL)) {
+            if (!trace_init_backends()) {
                 exit(1); /* error message will have been printed */
             }
             break;

qemu-options.hx

@@ -3544,7 +3544,7 @@ config files on @var{sysconfdir}, but won't make it skip the QEMU-provided confi
 files from @var{datadir}.
 ETEXI
 DEF("trace", HAS_ARG, QEMU_OPTION_trace,
-    "-trace [events=<file>][,file=<file>]\n"
+    "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
     "                specify tracing options\n",
     QEMU_ARCH_ALL)
 STEXI
@@ -3556,15 +3556,25 @@ HXCOMM HX does not support conditional compilation of text.
 Specify tracing options.
 
 @table @option
+@item [enable=]@var{pattern}
+Immediately enable events matching @var{pattern}.
+The file must contain one event name (as listed in the @file{trace-events} file)
+per line; globbing patterns are accepted too.  This option is only
+available if QEMU has been compiled with the @var{simple}, @var{stderr}
+or @var{ftrace} tracing backend.  To specify multiple events or patterns,
+specify the @option{-trace} option multiple times.
+
+Use @code{-trace help} to print a list of names of trace points.
+
 @item events=@var{file}
 Immediately enable events listed in @var{file}.
-The file must contain one event name (as listed in the @var{trace-events} file)
-per line.
-This option is only available if QEMU has been compiled with
-either @var{simple} or @var{stderr} tracing backend.
+The file must contain one event name (as listed in the @file{trace-events} file)
+per line; globbing patterns are accepted too.  This option is only
+available if QEMU has been compiled with the @var{simple}, @var{stderr} or
+@var{ftrace} tracing backend.
+
 @item file=@var{file}
 Log output traces to @var{file}.
-
 This option is only available if QEMU has been compiled with
 the @var{simple} tracing backend.
 @end table

qom/cpu.c

@@ -23,6 +23,7 @@
 #include "sysemu/kvm.h"
 #include "qemu/notify.h"
 #include "qemu/log.h"
+#include "exec/log.h"
 #include "qemu/error-report.h"
 #include "sysemu/sysemu.h"
 

scripts/tracetool/backend/log.py

@@ -25,6 +25,7 @@ def generate_h_begin(events):
         '#include <sys/types.h>',
         '#include <unistd.h>',
         '#include "trace/control.h"',
+        '#include "qemu/log.h"',
         '')
 
 
@@ -36,10 +37,10 @@ def generate_h(event):
     out('    if (trace_event_get_state(%(event_id)s)) {',
         '        struct timeval _now;',
         '        gettimeofday(&_now, NULL);',
-        '        fprintf(stderr, "%%d@%%zd.%%06zd:%(name)s " %(fmt)s "\\n",',
-        '                        getpid(),',
-        '                        (size_t)_now.tv_sec, (size_t)_now.tv_usec',
-        '                        %(argnames)s);',
+        '        qemu_log_mask(LOG_TRACE, "%%d@%%zd.%%06zd:%(name)s " %(fmt)s "\\n",',
+        '                      getpid(),',
+        '                      (size_t)_now.tv_sec, (size_t)_now.tv_usec',
+        '                      %(argnames)s);',
         '    }',
         event_id="TRACE_" + event.name.upper(),
         name=event.name,

scripts/tracetool/format/events_c.py

@@ -27,7 +27,7 @@ def generate(events, backend):
     out('TraceEvent trace_events[TRACE_EVENT_COUNT] = {')
 
     for e in events:
-        out('    { .id = %(id)s, .name = \"%(name)s\", .sstate = %(sstate)s, .dstate = 0 },',
+        out('    { .id = %(id)s, .name = \"%(name)s\", .sstate = %(sstate)s },',
             id = "TRACE_" + e.name.upper(),
             name = e.name,
             sstate = "TRACE_%s_ENABLED" % e.name.upper())

target-alpha/translate.c

@@ -28,6 +28,7 @@
 #include "exec/helper-gen.h"
 
 #include "trace-tcg.h"
+#include "exec/log.h"
 
 
 #undef ALPHA_DEBUG_DISAS

target-arm/translate-a64.c

@@ -31,6 +31,7 @@
 
 #include "exec/helper-proto.h"
 #include "exec/helper-gen.h"
+#include "exec/log.h"
 
 #include "trace-tcg.h"
 

target-arm/translate.c

@@ -32,6 +32,7 @@
 #include "exec/helper-gen.h"
 
 #include "trace-tcg.h"
+#include "exec/log.h"
 
 
 #define ENABLE_ARCH_4T    arm_dc_feature(s, ARM_FEATURE_V4T)

target-cris/translate.c

@@ -35,6 +35,7 @@
 #include "exec/helper-gen.h"
 
 #include "trace-tcg.h"
+#include "exec/log.h"
 
 
 #define DISAS_CRIS 0