aboutsummaryrefslogtreecommitdiff
path: root/scripts/tracetool/backend
diff options
context:
space:
mode:
Diffstat (limited to 'scripts/tracetool/backend')
-rw-r--r--scripts/tracetool/backend/__init__.py43
-rw-r--r--scripts/tracetool/backend/dtrace.py2
-rw-r--r--scripts/tracetool/backend/ftrace.py26
-rw-r--r--scripts/tracetool/backend/log.py22
-rw-r--r--scripts/tracetool/backend/simple.py17
-rw-r--r--scripts/tracetool/backend/syslog.py17
-rw-r--r--scripts/tracetool/backend/ust.py2
7 files changed, 75 insertions, 54 deletions
diff --git a/scripts/tracetool/backend/__init__.py b/scripts/tracetool/backend/__init__.py
index 7bfcc86..9109a78 100644
--- a/scripts/tracetool/backend/__init__.py
+++ b/scripts/tracetool/backend/__init__.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: GPL-2.0-or-later
"""
Backend management.
@@ -19,11 +19,15 @@ All backends must generate their contents through the 'tracetool.out' routine.
Backend attributes
------------------
-========= ====================================================================
-Attribute Description
-========= ====================================================================
-PUBLIC If exists and is set to 'True', the backend is considered "public".
-========= ====================================================================
+=========================== ====================================================
+Attribute Description
+=========================== ====================================================
+PUBLIC If exists and is set to 'True', the backend is
+ considered "public".
+CHECK_TRACE_EVENT_GET_STATE If exists and is set to 'True', the backend-specific
+ code inside the tracepoint is emitted within an
+ ``if trace_event_get_state()`` conditional.
+=========================== ====================================================
Backend functions
@@ -94,29 +98,40 @@ def exists(name):
if name == "nop":
return True
name = name.replace("-", "_")
- return tracetool.try_import("tracetool.backend." + name)[1]
+ return tracetool.try_import("tracetool.backend." + name)[0]
class Wrapper:
def __init__(self, backends, format):
self._backends = [backend.replace("-", "_") for backend in backends]
self._format = format.replace("-", "_")
+ self.check_trace_event_get_state = False
for backend in self._backends:
assert exists(backend)
assert tracetool.format.exists(self._format)
+ for backend in self.backend_modules():
+ check_trace_event_get_state = getattr(backend, "CHECK_TRACE_EVENT_GET_STATE", False)
+ self.check_trace_event_get_state = self.check_trace_event_get_state or check_trace_event_get_state
- def _run_function(self, name, *args, **kwargs):
+ def backend_modules(self):
for backend in self._backends:
- func = tracetool.try_import("tracetool.backend." + backend,
- name % self._format, None)[1]
- if func is not None:
- func(*args, **kwargs)
+ module = tracetool.try_import("tracetool.backend." + backend)[1]
+ if module is not None:
+ yield module
+
+ def _run_function(self, name, *args, check_trace_event_get_state=None, **kwargs):
+ for backend in self.backend_modules():
+ func = getattr(backend, name % self._format, None)
+ if func is not None and \
+ (check_trace_event_get_state is None or
+ check_trace_event_get_state == getattr(backend, 'CHECK_TRACE_EVENT_GET_STATE', False)):
+ func(*args, **kwargs)
def generate_begin(self, events, group):
self._run_function("generate_%s_begin", events, group)
- def generate(self, event, group):
- self._run_function("generate_%s", event, group)
+ def generate(self, event, group, check_trace_event_get_state=None):
+ self._run_function("generate_%s", event, group, check_trace_event_get_state=check_trace_event_get_state)
def generate_backend_dstate(self, event, group):
self._run_function("generate_%s_backend_dstate", event, group)
diff --git a/scripts/tracetool/backend/dtrace.py b/scripts/tracetool/backend/dtrace.py
index e17edc9..b4af403 100644
--- a/scripts/tracetool/backend/dtrace.py
+++ b/scripts/tracetool/backend/dtrace.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: GPL-2.0-or-later
"""
DTrace/SystemTAP backend.
diff --git a/scripts/tracetool/backend/ftrace.py b/scripts/tracetool/backend/ftrace.py
index 5fa30cc..e03698a 100644
--- a/scripts/tracetool/backend/ftrace.py
+++ b/scripts/tracetool/backend/ftrace.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: GPL-2.0-or-later
"""
Ftrace built-in backend.
@@ -12,10 +12,11 @@ __maintainer__ = "Stefan Hajnoczi"
__email__ = "stefanha@redhat.com"
-from tracetool import out
+from tracetool import out, expand_format_string
PUBLIC = True
+CHECK_TRACE_EVENT_GET_STATE = True
def generate_h_begin(events, group):
@@ -28,22 +29,11 @@ def generate_h(event, group):
if len(event.args) > 0:
argnames = ", " + argnames
- out(' {',
- ' char ftrace_buf[MAX_TRACE_STRLEN];',
- ' int unused __attribute__ ((unused));',
- ' int trlen;',
- ' if (trace_event_get_state(%(event_id)s)) {',
- '#line %(event_lineno)d "%(event_filename)s"',
- ' trlen = snprintf(ftrace_buf, MAX_TRACE_STRLEN,',
- ' "%(name)s " %(fmt)s "\\n" %(argnames)s);',
+ out('#line %(event_lineno)d "%(event_filename)s"',
+ ' ftrace_write("%(name)s " %(fmt)s "\\n" %(argnames)s);',
'#line %(out_next_lineno)d "%(out_filename)s"',
- ' trlen = MIN(trlen, MAX_TRACE_STRLEN - 1);',
- ' unused = write(trace_marker_fd, ftrace_buf, trlen);',
- ' }',
- ' }',
name=event.name,
args=event.args,
- event_id="TRACE_" + event.name.upper(),
event_lineno=event.lineno,
event_filename=event.filename,
fmt=event.fmt.rstrip("\n"),
@@ -53,3 +43,9 @@ def generate_h(event, group):
def generate_h_backend_dstate(event, group):
out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\',
event_id="TRACE_" + event.name.upper())
+
+def generate_rs(event, group):
+ out(' let format_string = c"%(fmt)s";',
+ ' unsafe {bindings::ftrace_write(format_string.as_ptr() as *const c_char, %(args)s);}',
+ fmt=expand_format_string(event.fmt),
+ args=event.args.rust_call_varargs())
diff --git a/scripts/tracetool/backend/log.py b/scripts/tracetool/backend/log.py
index eb50cee..9e3e504 100644
--- a/scripts/tracetool/backend/log.py
+++ b/scripts/tracetool/backend/log.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: GPL-2.0-or-later
"""
Stderr built-in backend.
@@ -12,10 +12,11 @@ __maintainer__ = "Stefan Hajnoczi"
__email__ = "stefanha@redhat.com"
-from tracetool import out
+from tracetool import out, expand_format_string
PUBLIC = True
+CHECK_TRACE_EVENT_GET_STATE = True
def generate_h_begin(events, group):
@@ -28,14 +29,11 @@ def generate_h(event, group):
if len(event.args) > 0:
argnames = ", " + argnames
- cond = "trace_event_get_state(%s)" % ("TRACE_" + event.name.upper())
-
- out(' if (%(cond)s && qemu_loglevel_mask(LOG_TRACE)) {',
+ out(' if (qemu_loglevel_mask(LOG_TRACE)) {',
'#line %(event_lineno)d "%(event_filename)s"',
- ' qemu_log("%(name)s " %(fmt)s "\\n"%(argnames)s);',
+ ' qemu_log("%(name)s " %(fmt)s "\\n"%(argnames)s);',
'#line %(out_next_lineno)d "%(out_filename)s"',
- ' }',
- cond=cond,
+ ' }',
event_lineno=event.lineno,
event_filename=event.filename,
name=event.name,
@@ -46,3 +44,11 @@ def generate_h(event, group):
def generate_h_backend_dstate(event, group):
out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\',
event_id="TRACE_" + event.name.upper())
+
+def generate_rs(event, group):
+ out(' let format_string = c"%(fmt)s\\n";',
+ ' if (unsafe { bindings::qemu_loglevel } & bindings::LOG_TRACE) != 0 {',
+ ' unsafe { bindings::qemu_log(format_string.as_ptr() as *const c_char, %(args)s);}',
+ ' }',
+ fmt=expand_format_string(event.fmt, event.name + " "),
+ args=event.args.rust_call_varargs())
diff --git a/scripts/tracetool/backend/simple.py b/scripts/tracetool/backend/simple.py
index 7c84c06..b131e4f 100644
--- a/scripts/tracetool/backend/simple.py
+++ b/scripts/tracetool/backend/simple.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: GPL-2.0-or-later
"""
Simple built-in backend.
@@ -16,6 +16,7 @@ from tracetool import out
PUBLIC = True
+CHECK_TRACE_EVENT_GET_STATE = True
def is_string(arg):
@@ -36,13 +37,8 @@ def generate_h_begin(events, group):
def generate_h(event, group):
- event_id = 'TRACE_' + event.name.upper()
- cond = "trace_event_get_state(%s)" % event_id
- out(' if (%(cond)s) {',
- ' _simple_%(api)s(%(args)s);',
- ' }',
+ out(' _simple_%(api)s(%(args)s);',
api=event.api(),
- cond=cond,
args=", ".join(event.args.names()))
@@ -102,3 +98,10 @@ def generate_c(event, group):
out(' trace_record_finish(&rec);',
'}',
'')
+
+def generate_rs(event, group):
+ out(' extern "C" { fn _simple_%(api)s(%(rust_args)s); }',
+ ' unsafe { _simple_%(api)s(%(args)s); }',
+ api=event.api(),
+ rust_args=event.args.rust_decl_extern(),
+ args=event.args.rust_call_extern())
diff --git a/scripts/tracetool/backend/syslog.py b/scripts/tracetool/backend/syslog.py
index 3f82e54..12b8265 100644
--- a/scripts/tracetool/backend/syslog.py
+++ b/scripts/tracetool/backend/syslog.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: GPL-2.0-or-later
"""
Syslog built-in backend.
@@ -12,10 +12,11 @@ __maintainer__ = "Stefan Hajnoczi"
__email__ = "stefanha@redhat.com"
-from tracetool import out
+from tracetool import out, expand_format_string
PUBLIC = True
+CHECK_TRACE_EVENT_GET_STATE = True
def generate_h_begin(events, group):
@@ -28,20 +29,20 @@ def generate_h(event, group):
if len(event.args) > 0:
argnames = ", " + argnames
- cond = "trace_event_get_state(%s)" % ("TRACE_" + event.name.upper())
-
- out(' if (%(cond)s) {',
- '#line %(event_lineno)d "%(event_filename)s"',
+ out('#line %(event_lineno)d "%(event_filename)s"',
' syslog(LOG_INFO, "%(name)s " %(fmt)s %(argnames)s);',
'#line %(out_next_lineno)d "%(out_filename)s"',
- ' }',
- cond=cond,
event_lineno=event.lineno,
event_filename=event.filename,
name=event.name,
fmt=event.fmt.rstrip("\n"),
argnames=argnames)
+def generate_rs(event, group):
+ out(' let format_string = c"%(fmt)s";',
+ ' unsafe {::trace::syslog(::trace::LOG_INFO, format_string.as_ptr() as *const c_char, %(args)s);}',
+ fmt=expand_format_string(event.fmt),
+ args=event.args.rust_call_varargs())
def generate_h_backend_dstate(event, group):
out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\',
diff --git a/scripts/tracetool/backend/ust.py b/scripts/tracetool/backend/ust.py
index c857516..3aa9bb1 100644
--- a/scripts/tracetool/backend/ust.py
+++ b/scripts/tracetool/backend/ust.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: GPL-2.0-or-later
"""
LTTng User Space Tracing backend.
generated by cgit v1.1 at 2025-10-05 14:07:19 +0000