--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
+ *
+ * lttng-context-interruptible.c
+ *
+ * LTTng interruptible context.
+ *
+ * Copyright (C) 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/irqflags.h>
+#include <lttng/events.h>
+#include <ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <lttng/tracer.h>
+
+/*
+ * Interruptible at value -1 means "unknown".
+ */
+
+static
+size_t interruptible_get_size(size_t offset)
+{
+ size_t size = 0;
+
+ size += lib_ring_buffer_align(offset, lttng_alignof(int8_t));
+ size += sizeof(int8_t);
+ return size;
+}
+
+static
+void interruptible_record(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan)
+{
+ struct lttng_probe_ctx *lttng_probe_ctx = ctx->priv;
+ int8_t interruptible = lttng_probe_ctx->interruptible;
+
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(interruptible));
+ chan->ops->event_write(ctx, &interruptible, sizeof(interruptible));
+}
+
+static
+void interruptible_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ int8_t interruptible = lttng_probe_ctx->interruptible;
+
+ value->s64 = interruptible;
+}
+
+int lttng_add_interruptible_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, "interruptible")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
+ field->event_field.name = "interruptible";
+ field->event_field.type.atype = atype_integer;
+ field->event_field.type.u.integer.size = sizeof(int8_t) * CHAR_BIT;
+ field->event_field.type.u.integer.alignment = lttng_alignof(int8_t) * CHAR_BIT;
+ field->event_field.type.u.integer.signedness = lttng_is_signed_type(int8_t);
+ field->event_field.type.u.integer.reverse_byte_order = 0;
+ field->event_field.type.u.integer.base = 10;
+ field->event_field.type.u.integer.encoding = lttng_encode_none;
+ field->get_size = interruptible_get_size;
+ field->record = interruptible_record;
+ field->get_value = interruptible_get_value;
+ lttng_context_update(*ctx);
+ wrapper_vmalloc_sync_mappings();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_add_interruptible_to_ctx);