Add syscall listing support

[lttng-tools.git] / src / bin / lttng-sessiond / syscall.h

diff --git a/src/bin/lttng-sessiond/syscall.h b/src/bin/lttng-sessiond/syscall.h
new file mode 100644 (file)
index 0000000..97fb669
--- /dev/null
+++ b/src/bin/lttng-sessiond/syscall.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2014 - David Goulet <dgoulet@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License, version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef SYSCALL_H
+#define SYSCALL_H
+
+#include <common/hashtable/hashtable.h>
+#include <lttng/event.h>
+
+#include "trace-kernel.h"
+
+/*
+ * Default size of the kernel system call array. With this size, we usually
+ * reallocate twice considering a 32 bit compat layer also.
+ */
+#define SYSCALL_TABLE_INIT_SIZE    256
+
+/* Maximum length of a syscall name. */
+#define SYSCALL_NAME_LEN           255
+
+/*
+ * Represent a kernel syscall and used when we are populating the internal
+ * list.
+ */
+struct syscall {
+       uint32_t index;
+       uint32_t bitness;
+       char name[SYSCALL_NAME_LEN];
+       /* Used by the list syscalls command. */
+       struct lttng_ht_node_str node;
+};
+
+/*
+ * Allocated once when listing all syscalls at boot time. This is an array
+ * indexed by the syscall index provided in the listing.
+ */
+extern struct syscall *syscall_table;
+
+/* Use to list kernel system calls. */
+int syscall_init_table(void);
+ssize_t syscall_table_list(struct lttng_event **events);
+ssize_t syscall_list_channel(struct ltt_kernel_channel *kchan,
+               struct lttng_event **_events, size_t size);
+
+#endif /* SYSCALL_H */