trace: get rid of generated-events.h/generated-events.c

Currently the generated-events.[ch] files contain the
event dstates, constants and TraceEvent structs, while the
generated-tracers.[ch] files contain the actual trace
probe logic. With the removal of usage of the event enums
from the API there is no longer any compelling reason for
the separation between these files. The generated-events.h
content is only ever needed from the generated-tracers.[ch]
files.

The enums/constants/structs from generated-events.[ch] are
thus moved into the generated-tracers.[ch], so that there
is one less file to be generated.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1475588159-30598-17-git-send-email-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Makefile

@@ -56,9 +56,6 @@ GENERATED_SOURCES += qmp-marshal.c qapi-types.c qapi-visit.c qapi-event.c
 GENERATED_HEADERS += qmp-introspect.h
 GENERATED_SOURCES += qmp-introspect.c
 
-GENERATED_HEADERS += trace/generated-events.h
-GENERATED_SOURCES += trace/generated-events.c
-
 GENERATED_HEADERS += trace/generated-tracers.h
 ifeq ($(findstring dtrace,$(TRACE_BACKENDS)),dtrace)
 GENERATED_HEADERS += trace/generated-tracers-dtrace.h

include/trace-tcg.h

@@ -2,6 +2,5 @@
 #define TRACE_TCG_H
 
 #include "trace/generated-tcg-tracers.h"
-#include "trace/generated-events.h"
 
 #endif /* TRACE_TCG_H */

include/trace.h

@@ -2,6 +2,5 @@
 #define TRACE_H
 
 #include "trace/generated-tracers.h"
-#include "trace/generated-events.h"
 
 #endif /* TRACE_H */

scripts/tracetool/format/c.py

@@ -17,12 +17,52 @@
 
 
 def generate(events, backend):
-    events = [e for e in events
-              if "disable" not in e.properties]
+    active_events = [e for e in events
+                     if "disable" not in e.properties]
 
     out('/* This file is autogenerated by tracetool, do not edit. */',
+        '',
+        '#include "qemu/osdep.h"',
+        '#include "trace.h"',
         '')
-    backend.generate_begin(events)
-    for event in events:
+
+    for e in events:
+        out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
+
+    for e in events:
+        if "vcpu" in e.properties:
+            vcpu_id = 0
+        else:
+            vcpu_id = "TRACE_VCPU_EVENT_NONE"
+        out('TraceEvent %(event)s = {',
+            '    .id = 0,',
+            '    .vcpu_id = %(vcpu_id)s,',
+            '    .name = \"%(name)s\",',
+            '    .sstate = %(sstate)s,',
+            '    .dstate = &%(dstate)s ',
+            '};',
+            event = e.api(e.QEMU_EVENT),
+            vcpu_id = vcpu_id,
+            name = e.name,
+            sstate = "TRACE_%s_ENABLED" % e.name.upper(),
+            dstate = e.api(e.QEMU_DSTATE))
+
+    out('TraceEvent *trace_events[] = {')
+
+    for e in events:
+        out('    &%(event)s,', event = e.api(e.QEMU_EVENT))
+
+    out('  NULL,',
+        '};',
+        '')
+
+    out('static void trace_register_events(void)',
+        '{',
+        '    trace_event_register_group(trace_events);',
+        '}',
+        'trace_init(trace_register_events)')
+
+    backend.generate_begin(active_events)
+    for event in active_events:
         backend.generate(event)
-    backend.generate_end(events)
+    backend.generate_end(active_events)

scripts/tracetool/format/events_c.py

@@ -1,62 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-trace/generated-events.c
-"""
-
-__author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__  = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
-__license__    = "GPL version 2 or (at your option) any later version"
-
-__maintainer__ = "Stefan Hajnoczi"
-__email__      = "stefanha@linux.vnet.ibm.com"
-
-
-from tracetool import out
-
-
-def generate(events, backend):
-    out('/* This file is autogenerated by tracetool, do not edit. */',
-        '',
-        '#include "qemu/osdep.h"',
-        '#include "trace.h"',
-        '#include "trace/generated-events.h"',
-        '#include "trace/control.h"',
-        '')
-
-    for e in events:
-        out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
-
-    for e in events:
-        if "vcpu" in e.properties:
-            vcpu_id = 0
-        else:
-            vcpu_id = "TRACE_VCPU_EVENT_NONE"
-        out('TraceEvent %(event)s = {',
-            '    .id = 0,',
-            '    .vcpu_id = %(vcpu_id)s,',
-            '    .name = \"%(name)s\",',
-            '    .sstate = %(sstate)s,',
-            '    .dstate = &%(dstate)s ',
-            '};',
-            event = e.api(e.QEMU_EVENT),
-            vcpu_id = vcpu_id,
-            name = e.name,
-            sstate = "TRACE_%s_ENABLED" % e.name.upper(),
-            dstate = e.api(e.QEMU_DSTATE))
-
-    out('TraceEvent *trace_events[] = {')
-
-    for e in events:
-        out('    &%(event)s,', event = e.api(e.QEMU_EVENT))
-
-    out('  NULL,',
-        '};',
-        '')
-
-    out('static void trace_register_events(void)',
-        '{',
-        '    trace_event_register_group(trace_events);',
-        '}',
-        'trace_init(trace_register_events)')

scripts/tracetool/format/events_h.py

@@ -1,49 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-trace/generated-events.h
-"""
-
-__author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__  = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
-__license__    = "GPL version 2 or (at your option) any later version"
-
-__maintainer__ = "Stefan Hajnoczi"
-__email__      = "stefanha@linux.vnet.ibm.com"
-
-
-from tracetool import out
-
-
-def generate(events, backend):
-    out('/* This file is autogenerated by tracetool, do not edit. */',
-        '',
-        '#ifndef TRACE__GENERATED_EVENTS_H',
-        '#define TRACE__GENERATED_EVENTS_H',
-        '',
-        '#include "trace/event-internal.h"',
-        )
-
-    for e in events:
-        out('extern TraceEvent %(event)s;',
-            event = e.api(e.QEMU_EVENT))
-
-    for e in events:
-        out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
-
-    # static state
-    for e in events:
-        if 'disable' in e.properties:
-            enabled = 0
-        else:
-            enabled = 1
-        if "tcg-exec" in e.properties:
-            # a single define for the two "sub-events"
-            out('#define TRACE_%(name)s_ENABLED %(enabled)d',
-                name=e.original.name.upper(),
-                enabled=enabled)
-        out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
-
-    out('',
-        '#endif  /* TRACE__GENERATED_EVENTS_H */')

scripts/tracetool/format/h.py

@@ -26,6 +26,26 @@ def generate(events, backend):
         '#include "trace/control.h"',
         '')
 
+    for e in events:
+        out('extern TraceEvent %(event)s;',
+            event = e.api(e.QEMU_EVENT))
+
+    for e in events:
+        out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
+
+    # static state
+    for e in events:
+        if 'disable' in e.properties:
+            enabled = 0
+        else:
+            enabled = 1
+        if "tcg-exec" in e.properties:
+            # a single define for the two "sub-events"
+            out('#define TRACE_%(name)s_ENABLED %(enabled)d',
+                name=e.original.name.upper(),
+                enabled=enabled)
+        out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
+
     backend.generate_begin(events)
 
     for e in events:

trace/Makefile.objs

@@ -32,32 +32,11 @@ $(obj)/generated-ust.c-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
 		--backends=$(TRACE_BACKENDS) \
 		< $< > $@,"GEN","$(patsubst %-timestamp,%,$@)")
 
-$(obj)/generated-events.h: $(obj)/generated-ust-provider.h
-$(obj)/generated-events.c: $(obj)/generated-ust.c
+$(obj)/generated-tracers.h: $(obj)/generated-ust-provider.h
+$(obj)/generated-tracers.c: $(obj)/generated-ust.c
 
 endif
 
-######################################################################
-# Auto-generated event descriptions
-
-$(obj)/generated-events.h: $(obj)/generated-events.h-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-events.h-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--format=events-h \
-		--backends=$(TRACE_BACKENDS) \
-		< $< > $@,"GEN","$(patsubst %-timestamp,%,$@)")
-
-$(obj)/generated-events.c: $(obj)/generated-events.c-timestamp $(BUILD_DIR)/config-host.mak
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-$(obj)/generated-events.c-timestamp: $(BUILD_DIR)/trace-events-all $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--format=events-c \
-		--backends=$(TRACE_BACKENDS) \
-		< $< > $@,"GEN","$(patsubst %-timestamp,%,$@)")
-
-util-obj-y += generated-events.o
-
 
 ######################################################################
 # Auto-generated tracing routines
@@ -154,7 +133,8 @@ $(obj)/generated-tcg-tracers.h-timestamp: $(BUILD_DIR)/trace-events-all $(BUILD_
 ######################################################################
 # Backend code
 
-util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o generated-tracers.o
+util-obj-y += generated-tracers.o
+util-obj-$(CONFIG_TRACE_SIMPLE) += simple.o
 util-obj-$(CONFIG_TRACE_FTRACE) += ftrace.o
 util-obj-$(CONFIG_TRACE_UST) += generated-ust.o
 util-obj-y += control.o

trace/control.h

@@ -11,7 +11,7 @@
 #define TRACE__CONTROL_H
 
 #include "qemu-common.h"
-#include "trace/generated-events.h"
+#include "event-internal.h"
 
 typedef struct TraceEventIter {
     size_t event;

trace/simple.h

@@ -11,10 +11,6 @@
 #ifndef TRACE_SIMPLE_H
 #define TRACE_SIMPLE_H
 
-
-#include "trace/generated-events.h"
-
-
 void st_print_trace_file_status(FILE *stream, fprintf_function stream_printf);
 void st_set_trace_file_enabled(bool enable);
 void st_set_trace_file(const char *file);