Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

1 files changed, 1832 insertions, 0 deletions

diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
new file mode 100644
index 000000000..e22237139
--- /dev/null
+++ b/tools/perf/util/data-convert-bt.c
@@ -0,0 +1,1832 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * CTF writing support via babeltrace.
+ *
+ * Copyright (C) 2014, Jiri Olsa <jolsa@redhat.com>
+ * Copyright (C) 2014, Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <babeltrace2-ctf-writer/writer.h>
+#include <babeltrace2-ctf-writer/clock.h>
+#include <babeltrace2-ctf-writer/stream.h>
+#include <babeltrace2-ctf-writer/event.h>
+#include <babeltrace2-ctf-writer/event-types.h>
+#include <babeltrace2-ctf-writer/event-fields.h>
+#include <babeltrace2-ctf-writer/utils.h>
+#include "asm/bug.h"
+#include "data-convert.h"
+#include "session.h"
+#include "debug.h"
+#include "tool.h"
+#include "evlist.h"
+#include "evsel.h"
+#include "machine.h"
+#include "config.h"
+#include <linux/ctype.h>
+#include <linux/err.h>
+#include <linux/time64.h>
+#include "util.h"
+#include "clockid.h"
+#include "util/sample.h"
+#include "util/time-utils.h"
+#include "header.h"
+
+#ifdef HAVE_LIBTRACEEVENT
+#include <event-parse.h>
+#endif
+
+#define pr_N(n, fmt, ...) \
+	eprintf(n, debug_data_convert, fmt, ##__VA_ARGS__)
+
+#define pr(fmt, ...)  pr_N(1, pr_fmt(fmt), ##__VA_ARGS__)
+#define pr2(fmt, ...) pr_N(2, pr_fmt(fmt), ##__VA_ARGS__)
+
+#define pr_time2(t, fmt, ...) pr_time_N(2, debug_data_convert, t, pr_fmt(fmt), ##__VA_ARGS__)
+
+struct evsel_priv {
+	struct bt_ctf_event_class *event_class;
+};
+
+#define MAX_CPUS	4096
+
+struct ctf_stream {
+	struct bt_ctf_stream *stream;
+	int cpu;
+	u32 count;
+};
+
+struct ctf_writer {
+	/* writer primitives */
+	struct bt_ctf_writer		 *writer;
+	struct ctf_stream		**stream;
+	int				  stream_cnt;
+	struct bt_ctf_stream_class	 *stream_class;
+	struct bt_ctf_clock		 *clock;
+
+	/* data types */
+	union {
+		struct {
+			struct bt_ctf_field_type	*s64;
+			struct bt_ctf_field_type	*u64;
+			struct bt_ctf_field_type	*s32;
+			struct bt_ctf_field_type	*u32;
+			struct bt_ctf_field_type	*string;
+			struct bt_ctf_field_type	*u32_hex;
+			struct bt_ctf_field_type	*u64_hex;
+		};
+		struct bt_ctf_field_type *array[6];
+	} data;
+	struct bt_ctf_event_class	*comm_class;
+	struct bt_ctf_event_class	*exit_class;
+	struct bt_ctf_event_class	*fork_class;
+	struct bt_ctf_event_class	*mmap_class;
+	struct bt_ctf_event_class	*mmap2_class;
+};
+
+struct convert {
+	struct perf_tool	tool;
+	struct ctf_writer	writer;
+
+	struct perf_time_interval *ptime_range;
+	int range_size;
+	int range_num;
+
+	u64			events_size;
+	u64			events_count;
+	u64			non_sample_count;
+	u64			skipped;
+
+	/* Ordered events configured queue size. */
+	u64			queue_size;
+};
+
+static int value_set(struct bt_ctf_field_type *type,
+		     struct bt_ctf_event *event,
+		     const char *name, u64 val)
+{
+	struct bt_ctf_field *field;
+	bool sign = bt_ctf_field_type_integer_get_signed(type);
+	int ret;
+
+	field = bt_ctf_field_create(type);
+	if (!field) {
+		pr_err("failed to create a field %s\n", name);
+		return -1;
+	}
+
+	if (sign) {
+		ret = bt_ctf_field_integer_signed_set_value(field, val);
+		if (ret) {
+			pr_err("failed to set field value %s\n", name);
+			goto err;
+		}
+	} else {
+		ret = bt_ctf_field_integer_unsigned_set_value(field, val);
+		if (ret) {
+			pr_err("failed to set field value %s\n", name);
+			goto err;
+		}
+	}
+
+	ret = bt_ctf_event_set_payload(event, name, field);
+	if (ret) {
+		pr_err("failed to set payload %s\n", name);
+		goto err;
+	}
+
+	pr2("  SET [%s = %" PRIu64 "]\n", name, val);
+
+err:
+	bt_ctf_field_put(field);
+	return ret;
+}
+
+#define __FUNC_VALUE_SET(_name, _val_type)				\
+static __maybe_unused int value_set_##_name(struct ctf_writer *cw,	\
+			     struct bt_ctf_event *event,		\
+			     const char *name,				\
+			     _val_type val)				\
+{									\
+	struct bt_ctf_field_type *type = cw->data._name;		\
+	return value_set(type, event, name, (u64) val);			\
+}
+
+#define FUNC_VALUE_SET(_name) __FUNC_VALUE_SET(_name, _name)
+
+FUNC_VALUE_SET(s32)
+FUNC_VALUE_SET(u32)
+FUNC_VALUE_SET(s64)
+FUNC_VALUE_SET(u64)
+__FUNC_VALUE_SET(u64_hex, u64)
+
+static int string_set_value(struct bt_ctf_field *field, const char *string);
+static __maybe_unused int
+value_set_string(struct ctf_writer *cw, struct bt_ctf_event *event,
+		 const char *name, const char *string)
+{
+	struct bt_ctf_field_type *type = cw->data.string;
+	struct bt_ctf_field *field;
+	int ret = 0;
+
+	field = bt_ctf_field_create(type);
+	if (!field) {
+		pr_err("failed to create a field %s\n", name);
+		return -1;
+	}
+
+	ret = string_set_value(field, string);
+	if (ret) {
+		pr_err("failed to set value %s\n", name);
+		goto err_put_field;
+	}
+
+	ret = bt_ctf_event_set_payload(event, name, field);
+	if (ret)
+		pr_err("failed to set payload %s\n", name);
+
+err_put_field:
+	bt_ctf_field_put(field);
+	return ret;
+}
+
+static struct bt_ctf_field_type*
+get_tracepoint_field_type(struct ctf_writer *cw, struct tep_format_field *field)
+{
+	unsigned long flags = field->flags;
+
+	if (flags & TEP_FIELD_IS_STRING)
+		return cw->data.string;
+
+	if (!(flags & TEP_FIELD_IS_SIGNED)) {
+		/* unsigned long are mostly pointers */
+		if (flags & TEP_FIELD_IS_LONG || flags & TEP_FIELD_IS_POINTER)
+			return cw->data.u64_hex;
+	}
+
+	if (flags & TEP_FIELD_IS_SIGNED) {
+		if (field->size == 8)
+			return cw->data.s64;
+		else
+			return cw->data.s32;
+	}
+
+	if (field->size == 8)
+		return cw->data.u64;
+	else
+		return cw->data.u32;
+}
+
+static unsigned long long adjust_signedness(unsigned long long value_int, int size)
+{
+	unsigned long long value_mask;
+
+	/*
+	 * value_mask = (1 << (size * 8 - 1)) - 1.
+	 * Directly set value_mask for code readers.
+	 */
+	switch (size) {
+	case 1:
+		value_mask = 0x7fULL;
+		break;
+	case 2:
+		value_mask = 0x7fffULL;
+		break;
+	case 4:
+		value_mask = 0x7fffffffULL;
+		break;
+	case 8:
+		/*
+		 * For 64 bit value, return it self. There is no need
+		 * to fill high bit.
+		 */
+		/* Fall through */
+	default:
+		/* BUG! */
+		return value_int;
+	}
+
+	/* If it is a positive value, don't adjust. */
+	if ((value_int & (~0ULL - value_mask)) == 0)
+		return value_int;
+
+	/* Fill upper part of value_int with 1 to make it a negative long long. */
+	return (value_int & value_mask) | ~value_mask;
+}
+
+static int string_set_value(struct bt_ctf_field *field, const char *string)
+{
+	char *buffer = NULL;
+	size_t len = strlen(string), i, p;
+	int err;
+
+	for (i = p = 0; i < len; i++, p++) {
+		if (isprint(string[i])) {
+			if (!buffer)
+				continue;
+			buffer[p] = string[i];
+		} else {
+			char numstr[5];
+
+			snprintf(numstr, sizeof(numstr), "\\x%02x",
+				 (unsigned int)(string[i]) & 0xff);
+
+			if (!buffer) {
+				buffer = zalloc(i + (len - i) * 4 + 2);
+				if (!buffer) {
+					pr_err("failed to set unprintable string '%s'\n", string);
+					return bt_ctf_field_string_set_value(field, "UNPRINTABLE-STRING");
+				}
+				if (i > 0)
+					strncpy(buffer, string, i);
+			}
+			memcpy(buffer + p, numstr, 4);
+			p += 3;
+		}
+	}
+
+	if (!buffer)
+		return bt_ctf_field_string_set_value(field, string);
+	err = bt_ctf_field_string_set_value(field, buffer);
+	free(buffer);
+	return err;
+}
+
+static int add_tracepoint_field_value(struct ctf_writer *cw,
+				      struct bt_ctf_event_class *event_class,
+				      struct bt_ctf_event *event,
+				      struct perf_sample *sample,
+				      struct tep_format_field *fmtf)
+{
+	struct bt_ctf_field_type *type;
+	struct bt_ctf_field *array_field;
+	struct bt_ctf_field *field;
+	const char *name = fmtf->name;
+	void *data = sample->raw_data;
+	unsigned long flags = fmtf->flags;
+	unsigned int n_items;
+	unsigned int i;
+	unsigned int offset;
+	unsigned int len;
+	int ret;
+
+	name = fmtf->alias;
+	offset = fmtf->offset;
+	len = fmtf->size;
+	if (flags & TEP_FIELD_IS_STRING)
+		flags &= ~TEP_FIELD_IS_ARRAY;
+
+	if (flags & TEP_FIELD_IS_DYNAMIC) {
+		unsigned long long tmp_val;
+
+		tmp_val = tep_read_number(fmtf->event->tep,
+					  data + offset, len);
+		offset = tmp_val;
+		len = offset >> 16;
+		offset &= 0xffff;
+		if (tep_field_is_relative(flags))
+			offset += fmtf->offset + fmtf->size;
+	}
+
+	if (flags & TEP_FIELD_IS_ARRAY) {
+
+		type = bt_ctf_event_class_get_field_by_name(
+				event_class, name);
+		array_field = bt_ctf_field_create(type);
+		bt_ctf_field_type_put(type);
+		if (!array_field) {
+			pr_err("Failed to create array type %s\n", name);
+			return -1;
+		}
+
+		len = fmtf->size / fmtf->arraylen;
+		n_items = fmtf->arraylen;
+	} else {
+		n_items = 1;
+		array_field = NULL;
+	}
+
+	type = get_tracepoint_field_type(cw, fmtf);
+
+	for (i = 0; i < n_items; i++) {
+		if (flags & TEP_FIELD_IS_ARRAY)
+			field = bt_ctf_field_array_get_field(array_field, i);
+		else
+			field = bt_ctf_field_create(type);
+
+		if (!field) {
+			pr_err("failed to create a field %s\n", name);
+			return -1;
+		}
+
+		if (flags & TEP_FIELD_IS_STRING)
+			ret = string_set_value(field, data + offset + i * len);
+		else {
+			unsigned long long value_int;
+
+			value_int = tep_read_number(
+					fmtf->event->tep,
+					data + offset + i * len, len);
+
+			if (!(flags & TEP_FIELD_IS_SIGNED))
+				ret = bt_ctf_field_integer_unsigned_set_value(
+						field, value_int);
+			else
+				ret = bt_ctf_field_integer_signed_set_value(
+						field, adjust_signedness(value_int, len));
+		}
+
+		if (ret) {
+			pr_err("failed to set file value %s\n", name);
+			goto err_put_field;
+		}
+		if (!(flags & TEP_FIELD_IS_ARRAY)) {
+			ret = bt_ctf_event_set_payload(event, name, field);
+			if (ret) {
+				pr_err("failed to set payload %s\n", name);
+				goto err_put_field;
+			}
+		}
+		bt_ctf_field_put(field);
+	}
+	if (flags & TEP_FIELD_IS_ARRAY) {
+		ret = bt_ctf_event_set_payload(event, name, array_field);
+		if (ret) {
+			pr_err("Failed add payload array %s\n", name);
+			return -1;
+		}
+		bt_ctf_field_put(array_field);
+	}
+	return 0;
+
+err_put_field:
+	bt_ctf_field_put(field);
+	return -1;
+}
+
+static int add_tracepoint_fields_values(struct ctf_writer *cw,
+					struct bt_ctf_event_class *event_class,
+					struct bt_ctf_event *event,
+					struct tep_format_field *fields,
+					struct perf_sample *sample)
+{
+	struct tep_format_field *field;
+	int ret;
+
+	for (field = fields; field; field = field->next) {
+		ret = add_tracepoint_field_value(cw, event_class, event, sample,
+				field);
+		if (ret)
+			return -1;
+	}
+	return 0;
+}
+
+static int add_tracepoint_values(struct ctf_writer *cw,
+				 struct bt_ctf_event_class *event_class,
+				 struct bt_ctf_event *event,
+				 struct evsel *evsel,
+				 struct perf_sample *sample)
+{
+	const struct tep_event *tp_format = evsel__tp_format(evsel);
+	struct tep_format_field *common_fields = tp_format->format.common_fields;
+	struct tep_format_field *fields        = tp_format->format.fields;
+	int ret;
+
+	ret = add_tracepoint_fields_values(cw, event_class, event,
+					   common_fields, sample);
+	if (!ret)
+		ret = add_tracepoint_fields_values(cw, event_class, event,
+						   fields, sample);
+
+	return ret;
+}
+
+static int
+add_bpf_output_values(struct bt_ctf_event_class *event_class,
+		      struct bt_ctf_event *event,
+		      struct perf_sample *sample)
+{
+	struct bt_ctf_field_type *len_type, *seq_type;
+	struct bt_ctf_field *len_field, *seq_field;
+	unsigned int raw_size = sample->raw_size;
+	unsigned int nr_elements = raw_size / sizeof(u32);
+	unsigned int i;
+	int ret;
+
+	if (nr_elements * sizeof(u32) != raw_size)
+		pr_warning("Incorrect raw_size (%u) in bpf output event, skip %zu bytes\n",
+			   raw_size, nr_elements * sizeof(u32) - raw_size);
+
+	len_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_len");
+	len_field = bt_ctf_field_create(len_type);
+	if (!len_field) {
+		pr_err("failed to create 'raw_len' for bpf output event\n");
+		ret = -1;
+		goto put_len_type;
+	}
+
+	ret = bt_ctf_field_integer_unsigned_set_value(len_field, nr_elements);
+	if (ret) {
+		pr_err("failed to set field value for raw_len\n");
+		goto put_len_field;
+	}
+	ret = bt_ctf_event_set_payload(event, "raw_len", len_field);
+	if (ret) {
+		pr_err("failed to set payload to raw_len\n");
+		goto put_len_field;
+	}
+
+	seq_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_data");
+	seq_field = bt_ctf_field_create(seq_type);
+	if (!seq_field) {
+		pr_err("failed to create 'raw_data' for bpf output event\n");
+		ret = -1;
+		goto put_seq_type;
+	}
+
+	ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
+	if (ret) {
+		pr_err("failed to set length of 'raw_data'\n");
+		goto put_seq_field;
+	}
+
+	for (i = 0; i < nr_elements; i++) {
+		struct bt_ctf_field *elem_field =
+			bt_ctf_field_sequence_get_field(seq_field, i);
+
+		ret = bt_ctf_field_integer_unsigned_set_value(elem_field,
+				((u32 *)(sample->raw_data))[i]);
+
+		bt_ctf_field_put(elem_field);
+		if (ret) {
+			pr_err("failed to set raw_data[%d]\n", i);
+			goto put_seq_field;
+		}
+	}
+
+	ret = bt_ctf_event_set_payload(event, "raw_data", seq_field);
+	if (ret)
+		pr_err("failed to set payload for raw_data\n");
+
+put_seq_field:
+	bt_ctf_field_put(seq_field);
+put_seq_type:
+	bt_ctf_field_type_put(seq_type);
+put_len_field:
+	bt_ctf_field_put(len_field);
+put_len_type:
+	bt_ctf_field_type_put(len_type);
+	return ret;
+}
+
+static int
+add_callchain_output_values(struct bt_ctf_event_class *event_class,
+		      struct bt_ctf_event *event,
+		      struct ip_callchain *callchain)
+{
+	struct bt_ctf_field_type *len_type, *seq_type;
+	struct bt_ctf_field *len_field, *seq_field;
+	unsigned int nr_elements = callchain->nr;
+	unsigned int i;
+	int ret;
+
+	len_type = bt_ctf_event_class_get_field_by_name(
+			event_class, "perf_callchain_size");
+	len_field = bt_ctf_field_create(len_type);
+	if (!len_field) {
+		pr_err("failed to create 'perf_callchain_size' for callchain output event\n");
+		ret = -1;
+		goto put_len_type;
+	}
+
+	ret = bt_ctf_field_integer_unsigned_set_value(len_field, nr_elements);
+	if (ret) {
+		pr_err("failed to set field value for perf_callchain_size\n");
+		goto put_len_field;
+	}
+	ret = bt_ctf_event_set_payload(event, "perf_callchain_size", len_field);
+	if (ret) {
+		pr_err("failed to set payload to perf_callchain_size\n");
+		goto put_len_field;
+	}
+
+	seq_type = bt_ctf_event_class_get_field_by_name(
+			event_class, "perf_callchain");
+	seq_field = bt_ctf_field_create(seq_type);
+	if (!seq_field) {
+		pr_err("failed to create 'perf_callchain' for callchain output event\n");
+		ret = -1;
+		goto put_seq_type;
+	}
+
+	ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
+	if (ret) {
+		pr_err("failed to set length of 'perf_callchain'\n");
+		goto put_seq_field;
+	}
+
+	for (i = 0; i < nr_elements; i++) {
+		struct bt_ctf_field *elem_field =
+			bt_ctf_field_sequence_get_field(seq_field, i);
+
+		ret = bt_ctf_field_integer_unsigned_set_value(elem_field,
+				((u64 *)(callchain->ips))[i]);
+
+		bt_ctf_field_put(elem_field);
+		if (ret) {
+			pr_err("failed to set callchain[%d]\n", i);
+			goto put_seq_field;
+		}
+	}
+
+	ret = bt_ctf_event_set_payload(event, "perf_callchain", seq_field);
+	if (ret)
+		pr_err("failed to set payload for raw_data\n");
+
+put_seq_field:
+	bt_ctf_field_put(seq_field);
+put_seq_type:
+	bt_ctf_field_type_put(seq_type);
+put_len_field:
+	bt_ctf_field_put(len_field);
+put_len_type:
+	bt_ctf_field_type_put(len_type);
+	return ret;
+}
+
+static int add_generic_values(struct ctf_writer *cw,
+			      struct bt_ctf_event *event,
+			      struct evsel *evsel,
+			      struct perf_sample *sample)
+{
+	u64 type = evsel->core.attr.sample_type;
+	int ret;
+
+	/*
+	 * missing:
+	 *   PERF_SAMPLE_TIME         - not needed as we have it in
+	 *                              ctf event header
+	 *   PERF_SAMPLE_READ         - TODO
+	 *   PERF_SAMPLE_RAW          - tracepoint fields are handled separately
+	 *   PERF_SAMPLE_BRANCH_STACK - TODO
+	 *   PERF_SAMPLE_REGS_USER    - TODO
+	 *   PERF_SAMPLE_STACK_USER   - TODO
+	 */
+
+	if (type & PERF_SAMPLE_IP) {
+		ret = value_set_u64_hex(cw, event, "perf_ip", sample->ip);
+		if (ret)
+			return -1;
+	}
+
+	if (type & PERF_SAMPLE_TID) {
+		ret = value_set_s32(cw, event, "perf_tid", sample->tid);
+		if (ret)
+			return -1;
+
+		ret = value_set_s32(cw, event, "perf_pid", sample->pid);
+		if (ret)
+			return -1;
+	}
+
+	if ((type & PERF_SAMPLE_ID) ||
+	    (type & PERF_SAMPLE_IDENTIFIER)) {
+		ret = value_set_u64(cw, event, "perf_id", sample->id);
+		if (ret)
+			return -1;
+	}
+
+	if (type & PERF_SAMPLE_STREAM_ID) {
+		ret = value_set_u64(cw, event, "perf_stream_id", sample->stream_id);
+		if (ret)
+			return -1;
+	}
+
+	if (type & PERF_SAMPLE_PERIOD) {
+		ret = value_set_u64(cw, event, "perf_period", sample->period);
+		if (ret)
+			return -1;
+	}
+
+	if (type & PERF_SAMPLE_WEIGHT) {
+		ret = value_set_u64(cw, event, "perf_weight", sample->weight);
+		if (ret)
+			return -1;
+	}
+
+	if (type & PERF_SAMPLE_DATA_SRC) {
+		ret = value_set_u64(cw, event, "perf_data_src",
+				sample->data_src);
+		if (ret)
+			return -1;
+	}
+
+	if (type & PERF_SAMPLE_TRANSACTION) {
+		ret = value_set_u64(cw, event, "perf_transaction",
+				sample->transaction);
+		if (ret)
+			return -1;
+	}
+
+	return 0;
+}
+
+static int ctf_stream__flush(struct ctf_stream *cs)
+{
+	int err = 0;
+
+	if (cs) {
+		err = bt_ctf_stream_flush(cs->stream);
+		if (err)
+			pr_err("CTF stream %d flush failed\n", cs->cpu);
+
+		pr("Flush stream for cpu %d (%u samples)\n",
+		   cs->cpu, cs->count);
+
+		cs->count = 0;
+	}
+
+	return err;
+}
+
+static struct ctf_stream *ctf_stream__create(struct ctf_writer *cw, int cpu)
+{
+	struct ctf_stream *cs;
+	struct bt_ctf_field *pkt_ctx   = NULL;
+	struct bt_ctf_field *cpu_field = NULL;
+	struct bt_ctf_stream *stream   = NULL;
+	int ret;
+
+	cs = zalloc(sizeof(*cs));
+	if (!cs) {
+		pr_err("Failed to allocate ctf stream\n");
+		return NULL;
+	}
+
+	stream = bt_ctf_writer_create_stream(cw->writer, cw->stream_class);
+	if (!stream) {
+		pr_err("Failed to create CTF stream\n");
+		goto out;
+	}
+
+	pkt_ctx = bt_ctf_stream_get_packet_context(stream);
+	if (!pkt_ctx) {
+		pr_err("Failed to obtain packet context\n");
+		goto out;
+	}
+
+	cpu_field = bt_ctf_field_structure_get_field(pkt_ctx, "cpu_id");
+	bt_ctf_field_put(pkt_ctx);
+	if (!cpu_field) {
+		pr_err("Failed to obtain cpu field\n");
+		goto out;
+	}
+
+	ret = bt_ctf_field_integer_unsigned_set_value(cpu_field, (u32) cpu);
+	if (ret) {
+		pr_err("Failed to update CPU number\n");
+		goto out;
+	}
+
+	bt_ctf_field_put(cpu_field);
+
+	cs->cpu    = cpu;
+	cs->stream = stream;
+	return cs;
+
+out:
+	if (cpu_field)
+		bt_ctf_field_put(cpu_field);
+	if (stream)
+		bt_ctf_stream_put(stream);
+
+	free(cs);
+	return NULL;
+}
+
+static void ctf_stream__delete(struct ctf_stream *cs)
+{
+	if (cs) {
+		bt_ctf_stream_put(cs->stream);
+		free(cs);
+	}
+}
+
+static struct ctf_stream *ctf_stream(struct ctf_writer *cw, int cpu)
+{
+	struct ctf_stream *cs = cw->stream[cpu];
+
+	if (!cs) {
+		cs = ctf_stream__create(cw, cpu);
+		cw->stream[cpu] = cs;
+	}
+
+	return cs;
+}
+
+static int get_sample_cpu(struct ctf_writer *cw, struct perf_sample *sample,
+			  struct evsel *evsel)
+{
+	int cpu = 0;
+
+	if (evsel->core.attr.sample_type & PERF_SAMPLE_CPU)
+		cpu = sample->cpu;
+
+	if (cpu > cw->stream_cnt) {
+		pr_err("Event was recorded for CPU %d, limit is at %d.\n",
+			cpu, cw->stream_cnt);
+		cpu = 0;
+	}
+
+	return cpu;
+}
+
+#define STREAM_FLUSH_COUNT 100000
+
+/*
+ * Currently we have no other way to determine the
+ * time for the stream flush other than keep track
+ * of the number of events and check it against
+ * threshold.
+ */
+static bool is_flush_needed(struct ctf_stream *cs)
+{
+	return cs->count >= STREAM_FLUSH_COUNT;
+}
+
+static int process_sample_event(const struct perf_tool *tool,
+				union perf_event *_event,
+				struct perf_sample *sample,
+				struct machine *machine __maybe_unused)
+{
+	struct convert *c = container_of(tool, struct convert, tool);
+	struct evsel *evsel = sample->evsel;
+	struct evsel_priv *priv = evsel->priv;
+	struct ctf_writer *cw = &c->writer;
+	struct ctf_stream *cs;
+	struct bt_ctf_event_class *event_class;
+	struct bt_ctf_event *event;
+	int ret;
+	unsigned long type = evsel->core.attr.sample_type;
+
+	if (WARN_ONCE(!priv, "Failed to setup all events.\n"))
+		return 0;
+
+	if (perf_time__ranges_skip_sample(c->ptime_range, c->range_num, sample->time)) {
+		++c->skipped;
+		return 0;
+	}
+
+	event_class = priv->event_class;
+
+	/* update stats */
+	c->events_count++;
+	c->events_size += _event->header.size;
+
+	pr_time2(sample->time, "sample %" PRIu64 "\n", c->events_count);
+
+	event = bt_ctf_event_create(event_class);
+	if (!event) {
+		pr_err("Failed to create an CTF event\n");
+		return -1;
+	}
+
+	bt_ctf_clock_set_time(cw->clock, sample->time);
+
+	ret = add_generic_values(cw, event, evsel, sample);
+	if (ret)
+		return -1;
+
+	if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
+		ret = add_tracepoint_values(cw, event_class, event,
+					    evsel, sample);
+		if (ret)
+			return -1;
+	}
+
+	if (type & PERF_SAMPLE_CALLCHAIN) {
+		ret = add_callchain_output_values(event_class,
+				event, sample->callchain);
+		if (ret)
+			return -1;
+	}
+
+	if (evsel__is_bpf_output(evsel)) {
+		ret = add_bpf_output_values(event_class, event, sample);
+		if (ret)
+			return -1;
+	}
+
+	cs = ctf_stream(cw, get_sample_cpu(cw, sample, evsel));
+	if (cs) {
+		if (is_flush_needed(cs))
+			ctf_stream__flush(cs);
+
+		cs->count++;
+		bt_ctf_stream_append_event(cs->stream, event);
+	}
+
+	bt_ctf_event_put(event);
+	return cs ? 0 : -1;
+}
+
+#define __NON_SAMPLE_SET_FIELD(_name, _type, _field) 	\
+do {							\
+	ret = value_set_##_type(cw, event, #_field, _event->_name._field);\
+	if (ret)					\
+		return -1;				\
+} while(0)
+
+#define __FUNC_PROCESS_NON_SAMPLE(_name, body) 	\
+static int process_##_name##_event(const struct perf_tool *tool,	\
+				   union perf_event *_event,	\
+				   struct perf_sample *sample,	\
+				   struct machine *machine)	\
+{								\
+	struct convert *c = container_of(tool, struct convert, tool);\
+	struct ctf_writer *cw = &c->writer;			\
+	struct bt_ctf_event_class *event_class = cw->_name##_class;\
+	struct bt_ctf_event *event;				\
+	struct ctf_stream *cs;					\
+	int ret;						\
+								\
+	c->non_sample_count++;					\
+	c->events_size += _event->header.size;			\
+	event = bt_ctf_event_create(event_class);		\
+	if (!event) {						\
+		pr_err("Failed to create an CTF event\n");	\
+		return -1;					\
+	}							\
+								\
+	bt_ctf_clock_set_time(cw->clock, sample->time);		\
+	body							\
+	cs = ctf_stream(cw, 0);					\
+	if (cs) {						\
+		if (is_flush_needed(cs))			\
+			ctf_stream__flush(cs);			\
+								\
+		cs->count++;					\
+		bt_ctf_stream_append_event(cs->stream, event);	\
+	}							\
+	bt_ctf_event_put(event);				\
+								\
+	return perf_event__process_##_name(tool, _event, sample, machine);\
+}
+
+__FUNC_PROCESS_NON_SAMPLE(comm,
+	__NON_SAMPLE_SET_FIELD(comm, u32, pid);
+	__NON_SAMPLE_SET_FIELD(comm, u32, tid);
+	__NON_SAMPLE_SET_FIELD(comm, string, comm);
+)
+__FUNC_PROCESS_NON_SAMPLE(fork,
+	__NON_SAMPLE_SET_FIELD(fork, u32, pid);
+	__NON_SAMPLE_SET_FIELD(fork, u32, ppid);
+	__NON_SAMPLE_SET_FIELD(fork, u32, tid);
+	__NON_SAMPLE_SET_FIELD(fork, u32, ptid);
+	__NON_SAMPLE_SET_FIELD(fork, u64, time);
+)
+
+__FUNC_PROCESS_NON_SAMPLE(exit,
+	__NON_SAMPLE_SET_FIELD(fork, u32, pid);
+	__NON_SAMPLE_SET_FIELD(fork, u32, ppid);
+	__NON_SAMPLE_SET_FIELD(fork, u32, tid);
+	__NON_SAMPLE_SET_FIELD(fork, u32, ptid);
+	__NON_SAMPLE_SET_FIELD(fork, u64, time);
+)
+__FUNC_PROCESS_NON_SAMPLE(mmap,
+	__NON_SAMPLE_SET_FIELD(mmap, u32, pid);
+	__NON_SAMPLE_SET_FIELD(mmap, u32, tid);
+	__NON_SAMPLE_SET_FIELD(mmap, u64_hex, start);
+	__NON_SAMPLE_SET_FIELD(mmap, string, filename);
+)
+__FUNC_PROCESS_NON_SAMPLE(mmap2,
+	__NON_SAMPLE_SET_FIELD(mmap2, u32, pid);
+	__NON_SAMPLE_SET_FIELD(mmap2, u32, tid);
+	__NON_SAMPLE_SET_FIELD(mmap2, u64_hex, start);
+	__NON_SAMPLE_SET_FIELD(mmap2, string, filename);
+)
+#undef __NON_SAMPLE_SET_FIELD
+#undef __FUNC_PROCESS_NON_SAMPLE
+
+/* If dup < 0, add a prefix. Else, add _dupl_X suffix. */
+static char *change_name(char *name, char *orig_name, int dup)
+{
+	char *new_name = NULL;
+	size_t len;
+
+	if (!name)
+		name = orig_name;
+
+	if (dup >= 10)
+		goto out;
+	/*
+	 * Add '_' prefix to potential keywork.  According to
+	 * Mathieu Desnoyers (https://lore.kernel.org/lkml/1074266107.40857.1422045946295.JavaMail.zimbra@efficios.com),
+	 * further CTF spec updating may require us to use '$'.
+	 */
+	if (dup < 0)
+		len = strlen(name) + sizeof("_");
+	else
+		len = strlen(orig_name) + sizeof("_dupl_X");
+
+	new_name = malloc(len);
+	if (!new_name)
+		goto out;
+
+	if (dup < 0)
+		snprintf(new_name, len, "_%s", name);
+	else
+		snprintf(new_name, len, "%s_dupl_%d", orig_name, dup);
+
+out:
+	if (name != orig_name)
+		free(name);
+	return new_name;
+}
+
+static int event_class_add_field(struct bt_ctf_event_class *event_class,
+		struct bt_ctf_field_type *type,
+		struct tep_format_field *field)
+{
+	struct bt_ctf_field_type *t = NULL;
+	char *name;
+	int dup = 1;
+	int ret;
+
+	/* alias was already assigned */
+	if (field->alias != field->name)
+		return bt_ctf_event_class_add_field(event_class, type,
+				(char *)field->alias);
+
+	name = field->name;
+
+	/* If 'name' is a keywork, add prefix. */
+	if (bt_ctf_validate_identifier(name))
+		name = change_name(name, field->name, -1);
+
+	if (!name) {
+		pr_err("Failed to fix invalid identifier.");
+		return -1;
+	}
+	while ((t = bt_ctf_event_class_get_field_by_name(event_class, name))) {
+		bt_ctf_field_type_put(t);
+		name = change_name(name, field->name, dup++);
+		if (!name) {
+			pr_err("Failed to create dup name for '%s'\n", field->name);
+			return -1;
+		}
+	}
+
+	ret = bt_ctf_event_class_add_field(event_class, type, name);
+	if (!ret)
+		field->alias = name;
+
+	return ret;
+}
+
+static int add_tracepoint_fields_types(struct ctf_writer *cw,
+				       struct tep_format_field *fields,
+				       struct bt_ctf_event_class *event_class)
+{
+	struct tep_format_field *field;
+	int ret;
+
+	for (field = fields; field; field = field->next) {
+		struct bt_ctf_field_type *type;
+		unsigned long flags = field->flags;
+
+		pr2("  field '%s'\n", field->name);
+
+		type = get_tracepoint_field_type(cw, field);
+		if (!type)
+			return -1;
+
+		/*
+		 * A string is an array of chars. For this we use the string
+		 * type and don't care that it is an array. What we don't
+		 * support is an array of strings.
+		 */
+		if (flags & TEP_FIELD_IS_STRING)
+			flags &= ~TEP_FIELD_IS_ARRAY;
+
+		if (flags & TEP_FIELD_IS_ARRAY)
+			type = bt_ctf_field_type_array_create(type, field->arraylen);
+
+		ret = event_class_add_field(event_class, type, field);
+
+		if (flags & TEP_FIELD_IS_ARRAY)
+			bt_ctf_field_type_put(type);
+
+		if (ret) {
+			pr_err("Failed to add field '%s': %d\n",
+					field->name, ret);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static int add_tracepoint_types(struct ctf_writer *cw,
+				struct evsel *evsel,
+				struct bt_ctf_event_class *class)
+{
+	const struct tep_event *tp_format = evsel__tp_format(evsel);
+	struct tep_format_field *common_fields = tp_format ? tp_format->format.common_fields : NULL;
+	struct tep_format_field *fields        = tp_format ? tp_format->format.fields : NULL;
+	int ret;
+
+	ret = add_tracepoint_fields_types(cw, common_fields, class);
+	if (!ret)
+		ret = add_tracepoint_fields_types(cw, fields, class);
+
+	return ret;
+}
+
+static int add_bpf_output_types(struct ctf_writer *cw,
+				struct bt_ctf_event_class *class)
+{
+	struct bt_ctf_field_type *len_type = cw->data.u32;
+	struct bt_ctf_field_type *seq_base_type = cw->data.u32_hex;
+	struct bt_ctf_field_type *seq_type;
+	int ret;
+
+	ret = bt_ctf_event_class_add_field(class, len_type, "raw_len");
+	if (ret)
+		return ret;
+
+	seq_type = bt_ctf_field_type_sequence_create(seq_base_type, "raw_len");
+	if (!seq_type)
+		return -1;
+
+	return bt_ctf_event_class_add_field(class, seq_type, "raw_data");
+}
+
+static int add_generic_types(struct ctf_writer *cw, struct evsel *evsel,
+			     struct bt_ctf_event_class *event_class)
+{
+	u64 type = evsel->core.attr.sample_type;
+
+	/*
+	 * missing:
+	 *   PERF_SAMPLE_TIME         - not needed as we have it in
+	 *                              ctf event header
+	 *   PERF_SAMPLE_READ         - TODO
+	 *   PERF_SAMPLE_CALLCHAIN    - TODO
+	 *   PERF_SAMPLE_RAW          - tracepoint fields and BPF output
+	 *                              are handled separately
+	 *   PERF_SAMPLE_BRANCH_STACK - TODO
+	 *   PERF_SAMPLE_REGS_USER    - TODO
+	 *   PERF_SAMPLE_STACK_USER   - TODO
+	 */
+
+#define ADD_FIELD(cl, t, n)						\
+	do {								\
+		pr2("  field '%s'\n", n);				\
+		if (bt_ctf_event_class_add_field(cl, t, n)) {		\
+			pr_err("Failed to add field '%s';\n", n);	\
+			return -1;					\
+		}							\
+	} while (0)
+
+	if (type & PERF_SAMPLE_IP)
+		ADD_FIELD(event_class, cw->data.u64_hex, "perf_ip");
+
+	if (type & PERF_SAMPLE_TID) {
+		ADD_FIELD(event_class, cw->data.s32, "perf_tid");
+		ADD_FIELD(event_class, cw->data.s32, "perf_pid");
+	}
+
+	if ((type & PERF_SAMPLE_ID) ||
+	    (type & PERF_SAMPLE_IDENTIFIER))
+		ADD_FIELD(event_class, cw->data.u64, "perf_id");
+
+	if (type & PERF_SAMPLE_STREAM_ID)
+		ADD_FIELD(event_class, cw->data.u64, "perf_stream_id");
+
+	if (type & PERF_SAMPLE_PERIOD)
+		ADD_FIELD(event_class, cw->data.u64, "perf_period");
+
+	if (type & PERF_SAMPLE_WEIGHT)
+		ADD_FIELD(event_class, cw->data.u64, "perf_weight");
+
+	if (type & PERF_SAMPLE_DATA_SRC)
+		ADD_FIELD(event_class, cw->data.u64, "perf_data_src");
+
+	if (type & PERF_SAMPLE_TRANSACTION)
+		ADD_FIELD(event_class, cw->data.u64, "perf_transaction");
+
+	if (type & PERF_SAMPLE_CALLCHAIN) {
+		ADD_FIELD(event_class, cw->data.u32, "perf_callchain_size");
+		ADD_FIELD(event_class,
+			bt_ctf_field_type_sequence_create(
+				cw->data.u64_hex, "perf_callchain_size"),
+			"perf_callchain");
+	}
+
+#undef ADD_FIELD
+	return 0;
+}
+
+static int add_event(struct ctf_writer *cw, struct evsel *evsel)
+{
+	struct bt_ctf_event_class *event_class;
+	struct evsel_priv *priv;
+	const char *name = evsel__name(evsel);
+	int ret;
+
+	if (evsel->priv) {
+		pr_err("Error: attempt to add already added event %s\n", name);
+		return -1;
+	}
+	pr("Adding event '%s' (type %d)\n", name, evsel->core.attr.type);
+
+	event_class = bt_ctf_event_class_create(name);
+	if (!event_class)
+		return -1;
+
+	ret = add_generic_types(cw, evsel, event_class);
+	if (ret)
+		goto err;
+
+	if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
+		ret = add_tracepoint_types(cw, evsel, event_class);
+		if (ret)
+			goto err;
+	}
+
+	if (evsel__is_bpf_output(evsel)) {
+		ret = add_bpf_output_types(cw, event_class);
+		if (ret)
+			goto err;
+	}
+
+	ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);
+	if (ret) {
+		pr("Failed to add event class into stream.\n");
+		goto err;
+	}
+
+	priv = malloc(sizeof(*priv));
+	if (!priv)
+		goto err;
+
+	priv->event_class = event_class;
+	evsel->priv       = priv;
+	return 0;
+
+err:
+	bt_ctf_event_class_put(event_class);
+	pr_err("Failed to add event '%s'.\n", name);
+	return -1;
+}
+
+enum setup_events_type {
+	SETUP_EVENTS_ALL,
+	SETUP_EVENTS_NOT_TRACEPOINT,
+	SETUP_EVENTS_TRACEPOINT_ONLY,
+};
+
+static int setup_events(struct ctf_writer *cw, struct perf_session *session,
+			enum setup_events_type type)
+{
+	struct evlist *evlist = session->evlist;
+	struct evsel *evsel;
+	int ret;
+
+	evlist__for_each_entry(evlist, evsel) {
+		bool is_tracepoint = evsel->core.attr.type == PERF_TYPE_TRACEPOINT;
+
+		if (is_tracepoint && type == SETUP_EVENTS_NOT_TRACEPOINT)
+			continue;
+
+		if (!is_tracepoint && type == SETUP_EVENTS_TRACEPOINT_ONLY)
+			continue;
+
+		ret = add_event(cw, evsel);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+#define __NON_SAMPLE_ADD_FIELD(t, n)						\
+	do {							\
+		pr2("  field '%s'\n", #n);			\
+		if (bt_ctf_event_class_add_field(event_class, cw->data.t, #n)) {\
+			pr_err("Failed to add field '%s';\n", #n);\
+			return -1;				\
+		}						\
+	} while(0)
+
+#define __FUNC_ADD_NON_SAMPLE_EVENT_CLASS(_name, body) 		\
+static int add_##_name##_event(struct ctf_writer *cw)		\
+{								\
+	struct bt_ctf_event_class *event_class;			\
+	int ret;						\
+								\
+	pr("Adding "#_name" event\n");				\
+	event_class = bt_ctf_event_class_create("perf_" #_name);\
+	if (!event_class)					\
+		return -1;					\
+	body							\
+								\
+	ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);\
+	if (ret) {						\
+		pr("Failed to add event class '"#_name"' into stream.\n");\
+		return ret;					\
+	}							\
+								\
+	cw->_name##_class = event_class;			\
+	bt_ctf_event_class_put(event_class);			\
+	return 0;						\
+}
+
+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(comm,
+	__NON_SAMPLE_ADD_FIELD(u32, pid);
+	__NON_SAMPLE_ADD_FIELD(u32, tid);
+	__NON_SAMPLE_ADD_FIELD(string, comm);
+)
+
+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(fork,
+	__NON_SAMPLE_ADD_FIELD(u32, pid);
+	__NON_SAMPLE_ADD_FIELD(u32, ppid);
+	__NON_SAMPLE_ADD_FIELD(u32, tid);
+	__NON_SAMPLE_ADD_FIELD(u32, ptid);
+	__NON_SAMPLE_ADD_FIELD(u64, time);
+)
+
+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(exit,
+	__NON_SAMPLE_ADD_FIELD(u32, pid);
+	__NON_SAMPLE_ADD_FIELD(u32, ppid);
+	__NON_SAMPLE_ADD_FIELD(u32, tid);
+	__NON_SAMPLE_ADD_FIELD(u32, ptid);
+	__NON_SAMPLE_ADD_FIELD(u64, time);
+)
+
+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap,
+	__NON_SAMPLE_ADD_FIELD(u32, pid);
+	__NON_SAMPLE_ADD_FIELD(u32, tid);
+	__NON_SAMPLE_ADD_FIELD(u64_hex, start);
+	__NON_SAMPLE_ADD_FIELD(string, filename);
+)
+
+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap2,
+	__NON_SAMPLE_ADD_FIELD(u32, pid);
+	__NON_SAMPLE_ADD_FIELD(u32, tid);
+	__NON_SAMPLE_ADD_FIELD(u64_hex, start);
+	__NON_SAMPLE_ADD_FIELD(string, filename);
+)
+#undef __NON_SAMPLE_ADD_FIELD
+#undef __FUNC_ADD_NON_SAMPLE_EVENT_CLASS
+
+static int setup_non_sample_events(struct ctf_writer *cw,
+				   struct perf_session *session __maybe_unused)
+{
+	int ret;
+
+	ret = add_comm_event(cw);
+	if (ret)
+		return ret;
+	ret = add_exit_event(cw);
+	if (ret)
+		return ret;
+	ret = add_fork_event(cw);
+	if (ret)
+		return ret;
+	ret = add_mmap_event(cw);
+	if (ret)
+		return ret;
+	ret = add_mmap2_event(cw);
+	if (ret)
+		return ret;
+	return 0;
+}
+
+static void cleanup_events(struct perf_session *session)
+{
+	struct evlist *evlist = session->evlist;
+	struct evsel *evsel;
+
+	evlist__for_each_entry(evlist, evsel) {
+		struct evsel_priv *priv;
+
+		priv = evsel->priv;
+		if (priv)
+			bt_ctf_event_class_put(priv->event_class);
+		zfree(&evsel->priv);
+	}
+
+	evlist__put(evlist);
+	session->evlist = NULL;
+}
+
+static int setup_streams(struct ctf_writer *cw, struct perf_session *session)
+{
+	struct ctf_stream **stream;
+	struct perf_env *env = perf_session__env(session);
+	int ncpus;
+
+	/*
+	 * Try to get the number of cpus used in the data file,
+	 * if not present fallback to the MAX_CPUS.
+	 */
+	ncpus = env->nr_cpus_avail ?: MAX_CPUS;
+
+	stream = calloc(ncpus, sizeof(*stream));
+	if (!stream) {
+		pr_err("Failed to allocate streams.\n");
+		return -ENOMEM;
+	}
+
+	cw->stream     = stream;
+	cw->stream_cnt = ncpus;
+	return 0;
+}
+
+static void free_streams(struct ctf_writer *cw)
+{
+	int cpu;
+
+	for (cpu = 0; cpu < cw->stream_cnt; cpu++)
+		ctf_stream__delete(cw->stream[cpu]);
+
+	zfree(&cw->stream);
+}
+
+static int ctf_writer__setup_env(struct ctf_writer *cw,
+				 struct perf_session *session)
+{
+	struct perf_env *env = perf_session__env(session);
+	struct bt_ctf_writer *writer = cw->writer;
+
+#define ADD(__n, __v)							\
+do {									\
+	if (__v && bt_ctf_writer_add_environment_field(writer, __n, __v))	\
+		return -1;						\
+} while (0)
+
+	ADD("host",    env->hostname);
+	ADD("sysname", "Linux");
+	ADD("release", perf_env__os_release(env));
+	ADD("version", env->version);
+	ADD("machine", env->arch);
+	ADD("domain", "kernel");
+	ADD("tracer_name", "perf");
+
+#undef ADD
+	return 0;
+}
+
+static int process_feature_event(const struct perf_tool *tool,
+				 struct perf_session *session,
+				 union perf_event *event)
+{
+	struct convert *c = container_of(tool, struct convert, tool);
+	struct ctf_writer *cw = &c->writer;
+	struct perf_record_header_feature *fe = &event->feat;
+	int ret = perf_event__process_feature(tool, session, event);
+
+	if (ret)
+		return ret;
+
+	switch (fe->feat_id) {
+	case HEADER_EVENT_DESC:
+		/*
+		 * In non-pipe mode (not here) the evsels combine the desc with
+		 * the perf_event_attr when it is parsed. In pipe mode the
+		 * perf_event_attr events appear first and then the event desc
+		 * feature events that set the names appear after. Once we have
+		 * the full evsel data we can generate the babeltrace
+		 * events. For tracepoint events we still don't have the tracing
+		 * data and so need to wait until the tracing data event to add
+		 * those events to babeltrace.
+		 */
+		return setup_events(cw, session, SETUP_EVENTS_NOT_TRACEPOINT);
+	case HEADER_HOSTNAME:
+		if (session->header.env.hostname) {
+			return bt_ctf_writer_add_environment_field(cw->writer, "host",
+								   session->header.env.hostname);
+		}
+		break;
+	case HEADER_OSRELEASE:
+		if (session->header.env.os_release) {
+			return bt_ctf_writer_add_environment_field(cw->writer, "release",
+								   session->header.env.os_release);
+		}
+		break;
+	case HEADER_VERSION:
+		if (session->header.env.version) {
+			return bt_ctf_writer_add_environment_field(cw->writer, "version",
+								   session->header.env.version);
+		}
+		break;
+	case HEADER_ARCH:
+		if (session->header.env.arch) {
+			return bt_ctf_writer_add_environment_field(cw->writer, "machine",
+								   session->header.env.arch);
+		}
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
+static int process_tracing_data(const struct perf_tool *tool,
+				struct perf_session *session,
+				union perf_event *event)
+{
+	struct convert *c = container_of(tool, struct convert, tool);
+	struct ctf_writer *cw = &c->writer;
+	int ret;
+
+	ret = perf_event__process_tracing_data(tool, session, event);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Now the attr was set up by the attr event, the name by the feature
+	 * event desc event and the tracepoint data set up above, the tracepoint
+	 * babeltrace events can be added.
+	 */
+	return setup_events(cw, session, SETUP_EVENTS_TRACEPOINT_ONLY);
+}
+
+static int ctf_writer__setup_clock(struct ctf_writer *cw,
+				   struct perf_session *session,
+				   bool tod)
+{
+	struct bt_ctf_clock *clock = cw->clock;
+	const char *desc = "perf clock";
+	int64_t offset = 0;
+
+	if (tod) {
+		struct perf_env *env = perf_session__env(session);
+
+		if (!env->clock.enabled) {
+			pr_err("Can't provide --tod time, missing clock data. "
+			       "Please record with -k/--clockid option.\n");
+			return -1;
+		}
+
+		desc   = clockid_name(env->clock.clockid);
+		offset = env->clock.tod_ns - env->clock.clockid_ns;
+	}
+
+#define SET(__n, __v)				\
+do {						\
+	if (bt_ctf_clock_set_##__n(clock, __v))	\
+		return -1;			\
+} while (0)
+
+	SET(frequency,   1000000000);
+	SET(offset,      offset);
+	SET(description, desc);
+	SET(precision,   10);
+	SET(is_absolute, 0);
+
+#undef SET
+	return 0;
+}
+
+static struct bt_ctf_field_type *create_int_type(int size, bool sign, bool hex)
+{
+	struct bt_ctf_field_type *type;
+
+	type = bt_ctf_field_type_integer_create(size);
+	if (!type)
+		return NULL;
+
+	if (sign &&
+	    bt_ctf_field_type_integer_set_signed(type, 1))
+		goto err;
+
+	if (hex &&
+	    bt_ctf_field_type_integer_set_base(type, BT_CTF_INTEGER_BASE_HEXADECIMAL))
+		goto err;
+
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+	bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_BIG_ENDIAN);
+#else
+	bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_LITTLE_ENDIAN);
+#endif
+
+	pr2("Created type: INTEGER %d-bit %ssigned %s\n",
+	    size, sign ? "un" : "", hex ? "hex" : "");
+	return type;
+
+err:
+	bt_ctf_field_type_put(type);
+	return NULL;
+}
+
+static void ctf_writer__cleanup_data(struct ctf_writer *cw)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(cw->data.array); i++)
+		bt_ctf_field_type_put(cw->data.array[i]);
+}
+
+static int ctf_writer__init_data(struct ctf_writer *cw)
+{
+#define CREATE_INT_TYPE(type, size, sign, hex)		\
+do {							\
+	(type) = create_int_type(size, sign, hex);	\
+	if (!(type))					\
+		goto err;				\
+} while (0)
+
+	CREATE_INT_TYPE(cw->data.s64, 64, true,  false);
+	CREATE_INT_TYPE(cw->data.u64, 64, false, false);
+	CREATE_INT_TYPE(cw->data.s32, 32, true,  false);
+	CREATE_INT_TYPE(cw->data.u32, 32, false, false);
+	CREATE_INT_TYPE(cw->data.u32_hex, 32, false, true);
+	CREATE_INT_TYPE(cw->data.u64_hex, 64, false, true);
+
+	cw->data.string  = bt_ctf_field_type_string_create();
+	if (cw->data.string)
+		return 0;
+
+err:
+	ctf_writer__cleanup_data(cw);
+	pr_err("Failed to create data types.\n");
+	return -1;
+}
+
+static void ctf_writer__cleanup(struct ctf_writer *cw)
+{
+	ctf_writer__cleanup_data(cw);
+
+	bt_ctf_clock_put(cw->clock);
+	free_streams(cw);
+	bt_ctf_stream_class_put(cw->stream_class);
+	bt_ctf_writer_put(cw->writer);
+
+	/* and NULL all the pointers */
+	memset(cw, 0, sizeof(*cw));
+}
+
+static int ctf_writer__init(struct ctf_writer *cw, const char *path,
+			    struct perf_session *session, bool tod)
+{
+	struct bt_ctf_writer		*writer;
+	struct bt_ctf_stream_class	*stream_class;
+	struct bt_ctf_clock		*clock;
+	struct bt_ctf_field_type	*pkt_ctx_type;
+	int				ret;
+
+	/* CTF writer */
+	writer = bt_ctf_writer_create(path);
+	if (!writer)
+		goto err;
+
+	cw->writer = writer;
+
+	/* CTF clock */
+	clock = bt_ctf_clock_create("perf_clock");
+	if (!clock) {
+		pr("Failed to create CTF clock.\n");
+		goto err_cleanup;
+	}
+
+	cw->clock = clock;
+
+	if (ctf_writer__setup_clock(cw, session, tod)) {
+		pr("Failed to setup CTF clock.\n");
+		goto err_cleanup;
+	}
+
+	/* CTF stream class */
+	stream_class = bt_ctf_stream_class_create("perf_stream");
+	if (!stream_class) {
+		pr("Failed to create CTF stream class.\n");
+		goto err_cleanup;
+	}
+
+	cw->stream_class = stream_class;
+
+	/* CTF clock stream setup */
+	if (bt_ctf_stream_class_set_clock(stream_class, clock)) {
+		pr("Failed to assign CTF clock to stream class.\n");
+		goto err_cleanup;
+	}
+
+	if (ctf_writer__init_data(cw))
+		goto err_cleanup;
+
+	/* Add cpu_id for packet context */
+	pkt_ctx_type = bt_ctf_stream_class_get_packet_context_type(stream_class);
+	if (!pkt_ctx_type)
+		goto err_cleanup;
+
+	ret = bt_ctf_field_type_structure_add_field(pkt_ctx_type, cw->data.u32, "cpu_id");
+	bt_ctf_field_type_put(pkt_ctx_type);
+	if (ret)
+		goto err_cleanup;
+
+	/* CTF clock writer setup */
+	if (bt_ctf_writer_add_clock(writer, clock)) {
+		pr("Failed to assign CTF clock to writer.\n");
+		goto err_cleanup;
+	}
+
+	return 0;
+
+err_cleanup:
+	ctf_writer__cleanup(cw);
+err:
+	pr_err("Failed to setup CTF writer.\n");
+	return -1;
+}
+
+static int ctf_writer__flush_streams(struct ctf_writer *cw)
+{
+	int cpu, ret = 0;
+
+	for (cpu = 0; cpu < cw->stream_cnt && !ret; cpu++)
+		ret = ctf_stream__flush(cw->stream[cpu]);
+
+	return ret;
+}
+
+static int convert__config(const char *var, const char *value, void *cb)
+{
+	struct convert *c = cb;
+
+	if (!strcmp(var, "convert.queue-size"))
+		return perf_config_u64(&c->queue_size, var, value);
+
+	return 0;
+}
+
+int bt_convert__perf2ctf(const char *input, const char *path,
+			 struct perf_data_convert_opts *opts)
+{
+	struct perf_session *session;
+	struct perf_data data = {
+		.path	   = input,
+		.mode      = PERF_DATA_MODE_READ,
+		.force     = opts->force,
+	};
+	struct convert c = {};
+	struct ctf_writer *cw = &c.writer;
+	int err;
+
+	perf_tool__init(&c.tool, /*ordered_events=*/true);
+	c.tool.sample          = process_sample_event;
+	c.tool.mmap            = perf_event__process_mmap;
+	c.tool.mmap2           = perf_event__process_mmap2;
+	c.tool.comm            = perf_event__process_comm;
+	c.tool.exit            = perf_event__process_exit;
+	c.tool.fork            = perf_event__process_fork;
+	c.tool.lost            = perf_event__process_lost;
+	c.tool.tracing_data    = process_tracing_data;
+	c.tool.build_id        = perf_event__process_build_id;
+	c.tool.namespaces      = perf_event__process_namespaces;
+	c.tool.finished_round  = perf_event__process_finished_round;
+	c.tool.attr            = perf_event__process_attr;
+	c.tool.feature         = process_feature_event;
+	c.tool.ordering_requires_timestamps = true;
+
+	if (opts->all) {
+		c.tool.comm = process_comm_event;
+		c.tool.exit = process_exit_event;
+		c.tool.fork = process_fork_event;
+		c.tool.mmap = process_mmap_event;
+		c.tool.mmap2 = process_mmap2_event;
+	}
+
+	err = perf_config(convert__config, &c);
+	if (err)
+		return err;
+
+	err = -1;
+	/* perf.data session */
+	session = perf_session__new(&data, &c.tool);
+	if (IS_ERR(session))
+		return PTR_ERR(session);
+
+	if (opts->time_str) {
+		err = perf_time__parse_for_ranges(opts->time_str, session,
+						  &c.ptime_range,
+						  &c.range_size,
+						  &c.range_num);
+		if (err < 0)
+			goto free_session;
+	}
+
+	/* CTF writer */
+	if (ctf_writer__init(cw, path, session, opts->tod))
+		goto free_session;
+
+	if (c.queue_size) {
+		ordered_events__set_alloc_size(&session->ordered_events,
+					       c.queue_size);
+	}
+
+	/* CTF writer env/clock setup  */
+	if (ctf_writer__setup_env(cw, session))
+		goto free_writer;
+
+	/*
+	 * CTF events setup. Note, in pipe mode no events exist yet (they come
+	 * in via header feature events) and so this does nothing.
+	 */
+	if (setup_events(cw, session, SETUP_EVENTS_ALL))
+		goto free_writer;
+
+	if (opts->all && setup_non_sample_events(cw, session))
+		goto free_writer;
+
+	if (setup_streams(cw, session))
+		goto free_writer;
+
+	err = perf_session__process_events(session);
+	if (!err)
+		err = ctf_writer__flush_streams(cw);
+	else
+		pr_err("Error during conversion.\n");
+
+	fprintf(stderr,	"[ perf data convert: Converted '%s' into CTF data '%s' ]\n",
+		data.path, path);
+
+	fprintf(stderr,	"[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples",
+		(double) c.events_size / 1024.0 / 1024.0,
+		c.events_count);
+
+	if (!c.non_sample_count)
+		fprintf(stderr, ") ]\n");
+	else
+		fprintf(stderr, ", %" PRIu64 " non-samples) ]\n", c.non_sample_count);
+
+	if (c.skipped) {
+		fprintf(stderr,	"[ perf data convert: Skipped %" PRIu64 " samples ]\n",
+			c.skipped);
+	}
+
+	if (c.ptime_range)
+		zfree(&c.ptime_range);
+
+	cleanup_events(session);
+	perf_session__delete(session);
+	ctf_writer__cleanup(cw);
+
+	return err;
+
+free_writer:
+	ctf_writer__cleanup(cw);
+free_session:
+	if (c.ptime_range)
+		zfree(&c.ptime_range);
+
+	perf_session__delete(session);
+	pr_err("Error during conversion setup.\n");
+	return err;
+}