tracetool/simple: add Rust support

Signed-off-by: Tanish Desai <tanishdesai37@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20250929154938.594389-13-pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

diff --git a/scripts/tracetool/backend/simple.py b/scripts/tracetool/backend/simple.py
index b5a6b7205a3167600c563001c404e2bf3d2e7ddc..b131e4fc194220efe5a1693e7d5224feff34a599 100644 (file)
--- a/scripts/tracetool/backend/simple.py
+++ b/scripts/tracetool/backend/simple.py
@@ -98,3 +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/tests/tracetool/simple.rs b/tests/tracetool/simple.rs
new file mode 100644 (file)
index 0000000..9ee3949
--- /dev/null
+++ b/tests/tracetool/simple.rs
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// This file is @generated by tracetool, do not edit.
+
+#[allow(unused_imports)]
+use std::ffi::c_char;
+#[allow(unused_imports)]
+use util::bindings;
+
+#[inline(always)]
+fn trace_event_state_is_enabled(dstate: u16) -> bool {
+    (unsafe { trace_events_enabled_count }) != 0 && dstate != 0
+}
+
+extern "C" {
+    static mut trace_events_enabled_count: u32;
+}
+extern "C" {
+    static mut _TRACE_TEST_BLAH_DSTATE: u16;
+    static mut _TRACE_TEST_WIBBLE_DSTATE: u16;
+}
+
+#[inline(always)]
+#[allow(dead_code)]
+pub fn trace_test_blah(_context: *mut (), _filename: &std::ffi::CStr)
+{
+    if trace_event_state_is_enabled(unsafe { _TRACE_TEST_BLAH_DSTATE}) {
+        extern "C" { fn _simple_trace_test_blah(_context: *mut (), _filename: *const std::ffi::c_char); }
+        unsafe { _simple_trace_test_blah(_context, _filename.as_ptr()); }
+    }
+}
+
+#[inline(always)]
+#[allow(dead_code)]
+pub fn trace_test_wibble(_context: *mut (), _value: std::ffi::c_int)
+{
+    if trace_event_state_is_enabled(unsafe { _TRACE_TEST_WIBBLE_DSTATE}) {
+        extern "C" { fn _simple_trace_test_wibble(_context: *mut (), _value: std::ffi::c_int); }
+        unsafe { _simple_trace_test_wibble(_context, _value); }
+    }
+}

diff --git a/tests/tracetool/tracetool-test.py b/tests/tracetool/tracetool-test.py
index 65430fdedc1d9f6d06d117a8118408f407c686db..3e37890476d0af77203692c88bfef013067d090e 100755 (executable)
--- a/tests/tracetool/tracetool-test.py
+++ b/tests/tracetool/tracetool-test.py
@@ -14,6 +14,8 @@ def get_formats(backend):
         "c",
         "h",
     ]
+    if backend in {"simple"}:
+        formats += ["rs"]
     if backend == "dtrace":
         formats += [
             "d",