X-Git-Url: http://git.lttng.org/?p=lttng-modules.git;a=blobdiff_plain;f=lttng-context-ppid.c;h=ef84ad1109e52967c94d7e272db510765c92492c;hp=b75b099f02218891ed12f00a452ef3ded4d10a90;hb=HEAD;hpb=b7cdc18250880cc44edeef4a4b42c8ac7a135a6d

diff --git a/lttng-context-ppid.c b/lttng-context-ppid.c
deleted file mode 100644
index b75b099f..00000000
--- a/lttng-context-ppid.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
- *
- * lttng-context-ppid.c
- *
- * LTTng PPID context.
- *
- * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/syscalls.h>
-#include <lttng-events.h>
-#include <wrapper/ringbuffer/frontend_types.h>
-#include <wrapper/vmalloc.h>
-#include <lttng-tracer.h>
-
-static
-size_t ppid_get_size(size_t offset)
-{
-	size_t size = 0;
-
-	size += lib_ring_buffer_align(offset, lttng_alignof(pid_t));
-	size += sizeof(pid_t);
-	return size;
-}
-
-static
-void ppid_record(struct lttng_ctx_field *field,
-		 struct lib_ring_buffer_ctx *ctx,
-		 struct lttng_channel *chan)
-{
-	pid_t ppid;
-
-	/*
-	 * TODO: when we eventually add RCU subsystem instrumentation,
-	 * taking the rcu read lock here will trigger RCU tracing
-	 * recursively. We should modify the kernel synchronization so
-	 * it synchronizes both for RCU and RCU sched, and rely on
-	 * rcu_read_lock_sched_notrace.
-	 */
-	rcu_read_lock();
-	ppid = task_tgid_nr(current->real_parent);
-	rcu_read_unlock();
-	lib_ring_buffer_align_ctx(ctx, lttng_alignof(ppid));
-	chan->ops->event_write(ctx, &ppid, sizeof(ppid));
-}
-
-static
-void ppid_get_value(struct lttng_ctx_field *field,
-		struct lttng_probe_ctx *lttng_probe_ctx,
-		union lttng_ctx_value *value)
-{
-	pid_t ppid;
-
-	/*
-	 * TODO: when we eventually add RCU subsystem instrumentation,
-	 * taking the rcu read lock here will trigger RCU tracing
-	 * recursively. We should modify the kernel synchronization so
-	 * it synchronizes both for RCU and RCU sched, and rely on
-	 * rcu_read_lock_sched_notrace.
-	 */
-	rcu_read_lock();
-	ppid = task_tgid_nr(current->real_parent);
-	rcu_read_unlock();
-	value->s64 = ppid;
-}
-
-int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx)
-{
-	struct lttng_ctx_field *field;
-
-	field = lttng_append_context(ctx);
-	if (!field)
-		return -ENOMEM;
-	if (lttng_find_context(*ctx, "ppid")) {
-		lttng_remove_context_field(ctx, field);
-		return -EEXIST;
-	}
-	field->event_field.name = "ppid";
-	field->event_field.type.atype = atype_integer;
-	field->event_field.type.u.basic.integer.size = sizeof(pid_t) * CHAR_BIT;
-	field->event_field.type.u.basic.integer.alignment = lttng_alignof(pid_t) * CHAR_BIT;
-	field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(pid_t);
-	field->event_field.type.u.basic.integer.reverse_byte_order = 0;
-	field->event_field.type.u.basic.integer.base = 10;
-	field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
-	field->get_size = ppid_get_size;
-	field->record = ppid_record;
-	field->get_value = ppid_get_value;
-	lttng_context_update(*ctx);
-	wrapper_vmalloc_sync_all();
-	return 0;
-}
-EXPORT_SYMBOL_GPL(lttng_add_ppid_to_ctx);