Adding upstream version 1.6.4.upstream/1.6.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 90 insertions, 0 deletions

diff --git a/src/tracefs-uprobes.c b/src/tracefs-uprobes.c
new file mode 100644
index 0000000..aa39b75
--- /dev/null
+++ b/src/tracefs-uprobes.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2022, VMware, Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
+ *
+ */
+#include <stdlib.h>
+#include <errno.h>
+
+#include "tracefs.h"
+#include "tracefs-local.h"
+
+#define UPROBE_DEFAULT_GROUP "uprobes"
+
+static struct tracefs_dynevent *
+uprobe_alloc(enum tracefs_dynevent_type type, const char *system, const char *event,
+	     const char *file, unsigned long long offset, const char *fetchargs)
+{
+	struct tracefs_dynevent *kp;
+	char *target;
+
+	if (!event || !file) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	if (!system)
+		system = UPROBE_DEFAULT_GROUP;
+
+	if (asprintf(&target, "%s:0x%0*llx", file, (int)(sizeof(void *) * 2), offset) < 0)
+		return NULL;
+
+	kp = dynevent_alloc(type, system, event, target, fetchargs);
+	free(target);
+
+	return kp;
+}
+
+/**
+ * tracefs_uprobe_alloc - Allocate new user probe (uprobe)
+ * @system: The system name (NULL for the default uprobes)
+ * @event: The name of the event to create
+ * @file: The full path to the binary file, where the uprobe will be set
+ * @offset: Offset within the @file
+ * @fetchargs: String with arguments, that will be fetched with the uprobe
+ *
+ * Allocate new uprobe context that will be in the @system group
+ * (or uprobes if @system is NULL) and with @event name. The new uprobe will be
+ * attached to @offset within the @file. The arguments described in @fetchargs
+ * will fetched with the uprobe. See linux/Documentation/trace/uprobetracer.rst
+ * for more details.
+ *
+ * The uprobe is not created in the system.
+ *
+ * Return a pointer to a uprobe context on success, or NULL on error.
+ * The returned pointer must be freed with tracefs_dynevent_free()
+ *
+ */
+struct tracefs_dynevent *
+tracefs_uprobe_alloc(const char *system, const char *event,
+		     const char *file, unsigned long long offset, const char *fetchargs)
+{
+	return uprobe_alloc(TRACEFS_DYNEVENT_UPROBE, system, event, file, offset, fetchargs);
+}
+
+/**
+ * tracefs_uretprobe_alloc - Allocate new user return probe (uretprobe)
+ * @system: The system name (NULL for the default uprobes)
+ * @event: The name of the event to create
+ * @file: The full path to the binary file, where the uretprobe will be set
+ * @offset: Offset within the @file
+ * @fetchargs: String with arguments, that will be fetched with the uretprobe
+ *
+ * Allocate mew uretprobe context that will be in the @system group
+ * (or uprobes if @system is NULL) and with @event name. The new uretprobe will
+ * be attached to @offset within the @file. The arguments described in @fetchargs
+ * will fetched with the uprobe. See linux/Documentation/trace/uprobetracer.rst
+ * for more details.
+ *
+ * The uretprobe is not created in the system.
+ *
+ * Return a pointer to a uretprobe context on success, or NULL on error.
+ * The returned pointer must be freed with tracefs_dynevent_free()
+ *
+ */
+struct tracefs_dynevent *
+tracefs_uretprobe_alloc(const char *system, const char *event,
+			const char *file, unsigned long long offset, const char *fetchargs)
+{
+	return uprobe_alloc(TRACEFS_DYNEVENT_URETPROBE, system, event, file, offset, fetchargs);
+}