Cleanup: Move lttng-modules instrumentation headers

[lttng-modules.git] / include / instrumentation / events / module.h

diff --git a/include/instrumentation/events/module.h b/include/instrumentation/events/module.h
new file mode 100644 (file)
index 0000000..5831650
--- /dev/null
+++ b/include/instrumentation/events/module.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Because linux/module.h has tracepoints in the header, and ftrace.h
+ * eventually includes this file, define_trace.h includes linux/module.h
+ * But we do not want the module.h to override the TRACE_SYSTEM macro
+ * variable that define_trace.h is processing, so we only set it
+ * when module events are being processed, which would happen when
+ * CREATE_TRACE_POINTS is defined.
+ */
+#ifdef CREATE_TRACE_POINTS
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM module
+#endif
+
+#if !defined(LTTNG_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define LTTNG_TRACE_MODULE_H
+
+#include <lttng/tracepoint-event.h>
+#include <linux/version.h>
+
+#ifdef CONFIG_MODULES
+
+#ifndef _TRACE_MODULE_DEF
+#define _TRACE_MODULE_DEF
+struct module;
+
+#endif
+
+LTTNG_TRACEPOINT_EVENT(module_load,
+
+       TP_PROTO(struct module *mod),
+
+       TP_ARGS(mod),
+
+       TP_FIELDS(
+               ctf_integer(unsigned int, taints, mod->taints)
+               ctf_string(name, mod->name)
+       )
+)
+
+LTTNG_TRACEPOINT_EVENT(module_free,
+
+       TP_PROTO(struct module *mod),
+
+       TP_ARGS(mod),
+
+       TP_FIELDS(
+               ctf_string(name, mod->name)
+       )
+)
+
+#ifdef CONFIG_MODULE_UNLOAD
+/* trace_module_get/put are only used if CONFIG_MODULE_UNLOAD is defined */
+
+LTTNG_TRACEPOINT_EVENT_CLASS(module_refcnt,
+
+       TP_PROTO(struct module *mod, unsigned long ip),
+
+       TP_ARGS(mod, ip),
+
+       TP_FIELDS(
+               ctf_integer_hex(unsigned long, ip, ip)
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
+               ctf_integer(int, refcnt, atomic_read(&mod->refcnt))
+#else
+               ctf_integer(int, refcnt, __this_cpu_read(mod->refptr->incs) + __this_cpu_read(mod->refptr->decs))
+#endif
+               ctf_string(name, mod->name)
+       )
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_get,
+
+       TP_PROTO(struct module *mod, unsigned long ip),
+
+       TP_ARGS(mod, ip)
+)
+
+LTTNG_TRACEPOINT_EVENT_INSTANCE(module_refcnt, module_put,
+
+       TP_PROTO(struct module *mod, unsigned long ip),
+
+       TP_ARGS(mod, ip)
+)
+#endif /* CONFIG_MODULE_UNLOAD */
+
+LTTNG_TRACEPOINT_EVENT(module_request,
+
+       TP_PROTO(char *name, bool wait, unsigned long ip),
+
+       TP_ARGS(name, wait, ip),
+
+       TP_FIELDS(
+               ctf_integer_hex(unsigned long, ip, ip)
+               ctf_integer(bool, wait, wait)
+               ctf_string(name, name)
+       )
+)
+
+#endif /* CONFIG_MODULES */
+
+#endif /* LTTNG_TRACE_MODULE_H */
+
+/* This part must be outside protection */
+#include <lttng/define_trace.h>