Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

3 files changed, 3003 insertions, 0 deletions

diff --git a/tools/perf/util/scripting-engines/Build b/tools/perf/util/scripting-engines/Build
new file mode 100644
index 000000000..24f087b0c
--- /dev/null
+++ b/tools/perf/util/scripting-engines/Build
@@ -0,0 +1,9 @@
+ifeq ($(CONFIG_LIBTRACEEVENT),y)
+  perf-util-$(CONFIG_LIBPERL)   += trace-event-perl.o
+endif
+perf-util-$(CONFIG_LIBPYTHON) += trace-event-python.o
+
+CFLAGS_trace-event-perl.o += $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow -Wno-nested-externs -Wno-undef -Wno-switch-default -Wno-bad-function-cast -Wno-declaration-after-statement -Wno-switch-enum -Wno-thread-safety-analysis
+
+# -Wno-declaration-after-statement: The python headers have mixed code with declarations (decls after asserts, for instance)
+CFLAGS_trace-event-python.o += $(PYTHON_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow -Wno-deprecated-declarations -Wno-switch-enum -Wno-declaration-after-statement
diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
new file mode 100644
index 000000000..410dc4cd0
--- /dev/null
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -0,0 +1,770 @@
+/*
+ * trace-event-perl.  Feed perf script events to an embedded Perl interpreter.
+ *
+ * Copyright (C) 2009 Tom Zanussi <tzanussi@gmail.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <linux/bitmap.h>
+#include <linux/time64.h>
+#include <event-parse.h>
+
+#include <stdbool.h>
+/* perl needs the following define, right after including stdbool.h */
+#define HAS_BOOL
+#include <EXTERN.h>
+#include <perl.h>
+
+#include "../callchain.h"
+#include "../dso.h"
+#include "../machine.h"
+#include "../map.h"
+#include "../symbol.h"
+#include "../thread.h"
+#include "../event.h"
+#include "../trace-event.h"
+#include "../evsel.h"
+#include "../debug.h"
+
+void boot_Perf__Trace__Context(pTHX_ CV *cv);
+void boot_DynaLoader(pTHX_ CV *cv);
+typedef PerlInterpreter * INTERP;
+
+void xs_init(pTHX);
+
+void xs_init(pTHX)
+{
+	const char *file = __FILE__;
+	dXSUB_SYS;
+
+	newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
+	      file);
+	newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
+}
+
+INTERP my_perl;
+
+#define TRACE_EVENT_TYPE_MAX				\
+	((1 << (sizeof(unsigned short) * 8)) - 1)
+
+extern struct scripting_context *scripting_context;
+
+static char *cur_field_name;
+static int zero_flag_atom;
+
+static void define_symbolic_value(const char *ev_name,
+				  const char *field_name,
+				  const char *field_value,
+				  const char *field_str)
+{
+	unsigned long long value;
+	dSP;
+
+	value = eval_flag(field_value);
+
+	ENTER;
+	SAVETMPS;
+	PUSHMARK(SP);
+
+	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
+	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
+	XPUSHs(sv_2mortal(newSVuv(value)));
+	XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
+
+	PUTBACK;
+	if (get_cv("main::define_symbolic_value", 0))
+		call_pv("main::define_symbolic_value", G_SCALAR);
+	SPAGAIN;
+	PUTBACK;
+	FREETMPS;
+	LEAVE;
+}
+
+static void define_symbolic_values(struct tep_print_flag_sym *field,
+				   const char *ev_name,
+				   const char *field_name)
+{
+	define_symbolic_value(ev_name, field_name, field->value, field->str);
+	if (field->next)
+		define_symbolic_values(field->next, ev_name, field_name);
+}
+
+static void define_symbolic_field(const char *ev_name,
+				  const char *field_name)
+{
+	dSP;
+
+	ENTER;
+	SAVETMPS;
+	PUSHMARK(SP);
+
+	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
+	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
+
+	PUTBACK;
+	if (get_cv("main::define_symbolic_field", 0))
+		call_pv("main::define_symbolic_field", G_SCALAR);
+	SPAGAIN;
+	PUTBACK;
+	FREETMPS;
+	LEAVE;
+}
+
+static void define_flag_value(const char *ev_name,
+			      const char *field_name,
+			      const char *field_value,
+			      const char *field_str)
+{
+	unsigned long long value;
+	dSP;
+
+	value = eval_flag(field_value);
+
+	ENTER;
+	SAVETMPS;
+	PUSHMARK(SP);
+
+	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
+	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
+	XPUSHs(sv_2mortal(newSVuv(value)));
+	XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
+
+	PUTBACK;
+	if (get_cv("main::define_flag_value", 0))
+		call_pv("main::define_flag_value", G_SCALAR);
+	SPAGAIN;
+	PUTBACK;
+	FREETMPS;
+	LEAVE;
+}
+
+static void define_flag_values(struct tep_print_flag_sym *field,
+			       const char *ev_name,
+			       const char *field_name)
+{
+	define_flag_value(ev_name, field_name, field->value, field->str);
+	if (field->next)
+		define_flag_values(field->next, ev_name, field_name);
+}
+
+static void define_flag_field(const char *ev_name,
+			      const char *field_name,
+			      const char *delim)
+{
+	dSP;
+
+	ENTER;
+	SAVETMPS;
+	PUSHMARK(SP);
+
+	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
+	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
+	XPUSHs(sv_2mortal(newSVpv(delim, 0)));
+
+	PUTBACK;
+	if (get_cv("main::define_flag_field", 0))
+		call_pv("main::define_flag_field", G_SCALAR);
+	SPAGAIN;
+	PUTBACK;
+	FREETMPS;
+	LEAVE;
+}
+
+static void define_event_symbols(struct tep_event *event,
+				 const char *ev_name,
+				 struct tep_print_arg *args)
+{
+	if (args == NULL)
+		return;
+
+	switch (args->type) {
+	case TEP_PRINT_NULL:
+		break;
+	case TEP_PRINT_ATOM:
+		define_flag_value(ev_name, cur_field_name, "0",
+				  args->atom.atom);
+		zero_flag_atom = 0;
+		break;
+	case TEP_PRINT_FIELD:
+		free(cur_field_name);
+		cur_field_name = strdup(args->field.name);
+		break;
+	case TEP_PRINT_FLAGS:
+		define_event_symbols(event, ev_name, args->flags.field);
+		define_flag_field(ev_name, cur_field_name, args->flags.delim);
+		define_flag_values(args->flags.flags, ev_name, cur_field_name);
+		break;
+	case TEP_PRINT_SYMBOL:
+		define_event_symbols(event, ev_name, args->symbol.field);
+		define_symbolic_field(ev_name, cur_field_name);
+		define_symbolic_values(args->symbol.symbols, ev_name,
+				       cur_field_name);
+		break;
+	case TEP_PRINT_HEX:
+	case TEP_PRINT_HEX_STR:
+		define_event_symbols(event, ev_name, args->hex.field);
+		define_event_symbols(event, ev_name, args->hex.size);
+		break;
+	case TEP_PRINT_INT_ARRAY:
+		define_event_symbols(event, ev_name, args->int_array.field);
+		define_event_symbols(event, ev_name, args->int_array.count);
+		define_event_symbols(event, ev_name, args->int_array.el_size);
+		break;
+	case TEP_PRINT_BSTRING:
+	case TEP_PRINT_DYNAMIC_ARRAY:
+	case TEP_PRINT_DYNAMIC_ARRAY_LEN:
+	case TEP_PRINT_STRING:
+	case TEP_PRINT_BITMASK:
+		break;
+	case TEP_PRINT_TYPE:
+		define_event_symbols(event, ev_name, args->typecast.item);
+		break;
+	case TEP_PRINT_OP:
+		if (strcmp(args->op.op, ":") == 0)
+			zero_flag_atom = 1;
+		define_event_symbols(event, ev_name, args->op.left);
+		define_event_symbols(event, ev_name, args->op.right);
+		break;
+	case TEP_PRINT_FUNC:
+	default:
+		pr_err("Unsupported print arg type\n");
+		/* we should warn... */
+		return;
+	}
+
+	if (args->next)
+		define_event_symbols(event, ev_name, args->next);
+}
+
+static SV *perl_process_callchain(struct perf_sample *sample,
+				  struct addr_location *al)
+{
+	struct callchain_cursor *cursor;
+	AV *list;
+
+	list = newAV();
+	if (!list)
+		goto exit;
+
+	if (!symbol_conf.use_callchain || !sample->callchain)
+		goto exit;
+
+	cursor = get_tls_callchain_cursor();
+
+	if (thread__resolve_callchain(al->thread, cursor,
+				      sample, NULL, NULL, scripting_max_stack) != 0) {
+		pr_err("Failed to resolve callchain. Skipping\n");
+		goto exit;
+	}
+	callchain_cursor_commit(cursor);
+
+
+	while (1) {
+		HV *elem;
+		struct callchain_cursor_node *node;
+		node = callchain_cursor_current(cursor);
+		if (!node)
+			break;
+
+		elem = newHV();
+		if (!elem)
+			goto exit;
+
+		if (!hv_stores(elem, "ip", newSVuv(node->ip))) {
+			hv_undef(elem);
+			goto exit;
+		}
+
+		if (node->ms.sym) {
+			HV *sym = newHV();
+			if (!sym) {
+				hv_undef(elem);
+				goto exit;
+			}
+			if (!hv_stores(sym, "start",   newSVuv(node->ms.sym->start)) ||
+			    !hv_stores(sym, "end",     newSVuv(node->ms.sym->end)) ||
+			    !hv_stores(sym, "binding", newSVuv(symbol__binding(node->ms.sym))) ||
+			    !hv_stores(sym, "name",    newSVpvn(node->ms.sym->name,
+								node->ms.sym->namelen)) ||
+			    !hv_stores(elem, "sym",    newRV_noinc((SV*)sym))) {
+				hv_undef(sym);
+				hv_undef(elem);
+				goto exit;
+			}
+		}
+
+		if (node->ms.map) {
+			struct map *map = node->ms.map;
+			struct dso *dso = map ? map__dso(map) : NULL;
+			const char *dsoname = "[unknown]";
+
+			if (dso) {
+				if (symbol_conf.show_kernel_path && dso__long_name(dso))
+					dsoname = dso__long_name(dso);
+				else
+					dsoname = dso__name(dso);
+			}
+			if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) {
+				hv_undef(elem);
+				goto exit;
+			}
+		}
+
+		callchain_cursor_advance(cursor);
+		av_push(list, newRV_noinc((SV*)elem));
+	}
+
+exit:
+	return newRV_noinc((SV*)list);
+}
+
+static void perl_process_tracepoint(struct perf_sample *sample,
+				    struct addr_location *al)
+{
+	struct thread *thread = al->thread;
+	struct tep_event *event;
+	struct tep_format_field *field;
+	static char handler[256];
+	unsigned long long val;
+	unsigned long s, ns;
+	int pid;
+	int cpu = sample->cpu;
+	void *data = sample->raw_data;
+	unsigned long long nsecs = sample->time;
+	const char *comm = thread__comm_str(thread);
+	DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
+	struct evsel *evsel = sample->evsel;
+
+	bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX);
+	dSP;
+
+	if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
+		return;
+
+	event = evsel__tp_format(evsel);
+	if (!event) {
+		pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
+		return;
+	}
+
+	pid = raw_field_value(event, "common_pid", data);
+
+	sprintf(handler, "%s::%s", event->system, event->name);
+
+	if (!__test_and_set_bit(event->id, events_defined))
+		define_event_symbols(event, handler, event->print_fmt.args);
+
+	s = nsecs / NSEC_PER_SEC;
+	ns = nsecs - s * NSEC_PER_SEC;
+
+	ENTER;
+	SAVETMPS;
+	PUSHMARK(SP);
+
+	XPUSHs(sv_2mortal(newSVpv(handler, 0)));
+	XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
+	XPUSHs(sv_2mortal(newSVuv(cpu)));
+	XPUSHs(sv_2mortal(newSVuv(s)));
+	XPUSHs(sv_2mortal(newSVuv(ns)));
+	XPUSHs(sv_2mortal(newSViv(pid)));
+	XPUSHs(sv_2mortal(newSVpv(comm, 0)));
+	XPUSHs(sv_2mortal(perl_process_callchain(sample, al)));
+
+	/* common fields other than pid can be accessed via xsub fns */
+
+	for (field = event->format.fields; field; field = field->next) {
+		if (field->flags & TEP_FIELD_IS_STRING) {
+			int offset;
+			if (field->flags & TEP_FIELD_IS_DYNAMIC) {
+				offset = *(int *)(data + field->offset);
+				offset &= 0xffff;
+				if (tep_field_is_relative(field->flags))
+					offset += field->offset + field->size;
+			} else
+				offset = field->offset;
+			XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
+		} else { /* FIELD_IS_NUMERIC */
+			val = read_size(event, data + field->offset,
+					field->size);
+			if (field->flags & TEP_FIELD_IS_SIGNED) {
+				XPUSHs(sv_2mortal(newSViv(val)));
+			} else {
+				XPUSHs(sv_2mortal(newSVuv(val)));
+			}
+		}
+	}
+
+	PUTBACK;
+
+	if (get_cv(handler, 0))
+		call_pv(handler, G_SCALAR);
+	else if (get_cv("main::trace_unhandled", 0)) {
+		XPUSHs(sv_2mortal(newSVpv(handler, 0)));
+		XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
+		XPUSHs(sv_2mortal(newSVuv(cpu)));
+		XPUSHs(sv_2mortal(newSVuv(nsecs)));
+		XPUSHs(sv_2mortal(newSViv(pid)));
+		XPUSHs(sv_2mortal(newSVpv(comm, 0)));
+		XPUSHs(sv_2mortal(perl_process_callchain(sample, al)));
+		call_pv("main::trace_unhandled", G_SCALAR);
+	}
+	SPAGAIN;
+	PUTBACK;
+	FREETMPS;
+	LEAVE;
+}
+
+static void perl_process_event_generic(union perf_event *event, struct perf_sample *sample)
+{
+	dSP;
+
+	if (!get_cv("process_event", 0))
+		return;
+
+	ENTER;
+	SAVETMPS;
+	PUSHMARK(SP);
+	XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
+	XPUSHs(sv_2mortal(newSVpvn((const char *)&sample->evsel->core.attr,
+				   sizeof(sample->evsel->core.attr))));
+	XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
+	XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
+	PUTBACK;
+	call_pv("process_event", G_SCALAR);
+	SPAGAIN;
+	PUTBACK;
+	FREETMPS;
+	LEAVE;
+}
+
+static void perl_process_event(union perf_event *event,
+			       struct perf_sample *sample,
+			       struct addr_location *al,
+			       struct addr_location *addr_al)
+{
+	scripting_context__update(scripting_context, event, sample, al, addr_al);
+	perl_process_tracepoint(sample, al);
+	perl_process_event_generic(event, sample);
+}
+
+static void run_start_sub(void)
+{
+	dSP; /* access to Perl stack */
+	PUSHMARK(SP);
+
+	if (get_cv("main::trace_begin", 0))
+		call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
+}
+
+/*
+ * Start trace script
+ */
+static int perl_start_script(const char *script, int argc, const char **argv,
+			     struct perf_session *session)
+{
+	const char **command_line;
+	int i, err = 0;
+
+	scripting_context->session = session;
+
+	command_line = malloc((argc + 2) * sizeof(const char *));
+	if (!command_line)
+		return -ENOMEM;
+
+	command_line[0] = "";
+	command_line[1] = script;
+	for (i = 2; i < argc + 2; i++)
+		command_line[i] = argv[i - 2];
+
+	my_perl = perl_alloc();
+	perl_construct(my_perl);
+
+	if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
+		       (char **)NULL)) {
+		err = -1;
+		goto error;
+	}
+
+	if (perl_run(my_perl)) {
+		err = -1;
+		goto error;
+	}
+
+	if (SvTRUE(ERRSV)) {
+		err = -1;
+		goto error;
+	}
+
+	run_start_sub();
+
+	free(command_line);
+	return 0;
+error:
+	perl_free(my_perl);
+	free(command_line);
+
+	return err;
+}
+
+static int perl_flush_script(void)
+{
+	return 0;
+}
+
+/*
+ * Stop trace script
+ */
+static int perl_stop_script(void)
+{
+	dSP; /* access to Perl stack */
+	PUSHMARK(SP);
+
+	if (get_cv("main::trace_end", 0))
+		call_pv("main::trace_end", G_DISCARD | G_NOARGS);
+
+	perl_destruct(my_perl);
+	perl_free(my_perl);
+
+	return 0;
+}
+
+static int perl_generate_script(struct tep_handle *pevent, const char *outfile)
+{
+	int i, not_first, count, nr_events;
+	struct tep_event **all_events;
+	struct tep_event *event = NULL;
+	struct tep_format_field *f;
+	char fname[PATH_MAX];
+	FILE *ofp;
+
+	sprintf(fname, "%s.pl", outfile);
+	ofp = fopen(fname, "w");
+	if (ofp == NULL) {
+		fprintf(stderr, "couldn't open %s\n", fname);
+		return -1;
+	}
+
+	fprintf(ofp, "# perf script event handlers, "
+		"generated by perf script -g perl\n");
+
+	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
+		" License version 2\n\n");
+
+	fprintf(ofp, "# The common_* event handler fields are the most useful "
+		"fields common to\n");
+
+	fprintf(ofp, "# all events.  They don't necessarily correspond to "
+		"the 'common_*' fields\n");
+
+	fprintf(ofp, "# in the format files.  Those fields not available as "
+		"handler params can\n");
+
+	fprintf(ofp, "# be retrieved using Perl functions of the form "
+		"common_*($context).\n");
+
+	fprintf(ofp, "# See Context.pm for the list of available "
+		"functions.\n\n");
+
+	fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
+		"Perf-Trace-Util/lib\";\n");
+
+	fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
+	fprintf(ofp, "use Perf::Trace::Core;\n");
+	fprintf(ofp, "use Perf::Trace::Context;\n");
+	fprintf(ofp, "use Perf::Trace::Util;\n\n");
+
+	fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
+	fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n");
+
+
+	fprintf(ofp, "\n\
+sub print_backtrace\n\
+{\n\
+	my $callchain = shift;\n\
+	for my $node (@$callchain)\n\
+	{\n\
+		if(exists $node->{sym})\n\
+		{\n\
+			printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\
+		}\n\
+		else\n\
+		{\n\
+			printf( \"\\t[\\%%x]\\n\", $node{ip});\n\
+		}\n\
+	}\n\
+}\n\n\
+");
+
+	nr_events = tep_get_events_count(pevent);
+	all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
+
+	for (i = 0; all_events && i < nr_events; i++) {
+		event = all_events[i];
+		fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
+		fprintf(ofp, "\tmy (");
+
+		fprintf(ofp, "$event_name, ");
+		fprintf(ofp, "$context, ");
+		fprintf(ofp, "$common_cpu, ");
+		fprintf(ofp, "$common_secs, ");
+		fprintf(ofp, "$common_nsecs,\n");
+		fprintf(ofp, "\t    $common_pid, ");
+		fprintf(ofp, "$common_comm, ");
+		fprintf(ofp, "$common_callchain,\n\t    ");
+
+		not_first = 0;
+		count = 0;
+
+		for (f = event->format.fields; f; f = f->next) {
+			if (not_first++)
+				fprintf(ofp, ", ");
+			if (++count % 5 == 0)
+				fprintf(ofp, "\n\t    ");
+
+			fprintf(ofp, "$%s", f->name);
+		}
+		fprintf(ofp, ") = @_;\n\n");
+
+		fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
+			"$common_secs, $common_nsecs,\n\t             "
+			"$common_pid, $common_comm, $common_callchain);\n\n");
+
+		fprintf(ofp, "\tprintf(\"");
+
+		not_first = 0;
+		count = 0;
+
+		for (f = event->format.fields; f; f = f->next) {
+			if (not_first++)
+				fprintf(ofp, ", ");
+			if (count && count % 4 == 0) {
+				fprintf(ofp, "\".\n\t       \"");
+			}
+			count++;
+
+			fprintf(ofp, "%s=", f->name);
+			if (f->flags & TEP_FIELD_IS_STRING ||
+			    f->flags & TEP_FIELD_IS_FLAG ||
+			    f->flags & TEP_FIELD_IS_SYMBOLIC)
+				fprintf(ofp, "%%s");
+			else if (f->flags & TEP_FIELD_IS_SIGNED)
+				fprintf(ofp, "%%d");
+			else
+				fprintf(ofp, "%%u");
+		}
+
+		fprintf(ofp, "\\n\",\n\t       ");
+
+		not_first = 0;
+		count = 0;
+
+		for (f = event->format.fields; f; f = f->next) {
+			if (not_first++)
+				fprintf(ofp, ", ");
+
+			if (++count % 5 == 0)
+				fprintf(ofp, "\n\t       ");
+
+			if (f->flags & TEP_FIELD_IS_FLAG) {
+				if ((count - 1) % 5 != 0) {
+					fprintf(ofp, "\n\t       ");
+					count = 4;
+				}
+				fprintf(ofp, "flag_str(\"");
+				fprintf(ofp, "%s::%s\", ", event->system,
+					event->name);
+				fprintf(ofp, "\"%s\", $%s)", f->name,
+					f->name);
+			} else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
+				if ((count - 1) % 5 != 0) {
+					fprintf(ofp, "\n\t       ");
+					count = 4;
+				}
+				fprintf(ofp, "symbol_str(\"");
+				fprintf(ofp, "%s::%s\", ", event->system,
+					event->name);
+				fprintf(ofp, "\"%s\", $%s)", f->name,
+					f->name);
+			} else
+				fprintf(ofp, "$%s", f->name);
+		}
+
+		fprintf(ofp, ");\n\n");
+
+		fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
+
+		fprintf(ofp, "}\n\n");
+	}
+
+	fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
+		"$common_cpu, $common_secs, $common_nsecs,\n\t    "
+		"$common_pid, $common_comm, $common_callchain) = @_;\n\n");
+
+	fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
+		"$common_secs, $common_nsecs,\n\t             $common_pid, "
+		"$common_comm, $common_callchain);\n");
+	fprintf(ofp, "\tprint_backtrace($common_callchain);\n");
+	fprintf(ofp, "}\n\n");
+
+	fprintf(ofp, "sub print_header\n{\n"
+		"\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
+		"\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t       "
+		"$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}\n");
+
+	fprintf(ofp,
+		"\n# Packed byte string args of process_event():\n"
+		"#\n"
+		"# $event:\tunion perf_event\tutil/event.h\n"
+		"# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
+		"# $sample:\tstruct perf_sample\tutil/event.h\n"
+		"# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
+		"\n"
+		"sub process_event\n"
+		"{\n"
+		"\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
+		"\n"
+		"\tmy @event\t= unpack(\"LSS\", $event);\n"
+		"\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
+		"\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
+		"\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
+		"\n"
+		"\tuse Data::Dumper;\n"
+		"\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
+		"}\n");
+
+	fclose(ofp);
+
+	fprintf(stderr, "generated Perl script: %s\n", fname);
+
+	return 0;
+}
+
+struct scripting_ops perl_scripting_ops = {
+	.name = "Perl",
+	.dirname = "perl",
+	.start_script = perl_start_script,
+	.flush_script = perl_flush_script,
+	.stop_script = perl_stop_script,
+	.process_event = perl_process_event,
+	.generate_script = perl_generate_script,
+};
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
new file mode 100644
index 000000000..8f832ae31
--- /dev/null
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -0,0 +1,2224 @@
+/*
+ * trace-event-python.  Feed trace events to an embedded Python interpreter.
+ *
+ * Copyright (C) 2010 Tom Zanussi <tzanussi@gmail.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <Python.h>
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <linux/bitmap.h>
+#include <linux/compiler.h>
+#include <linux/time64.h>
+#ifdef HAVE_LIBTRACEEVENT
+#include <event-parse.h>
+#endif
+
+#include "../build-id.h"
+#include "../counts.h"
+#include "../debug.h"
+#include "../dso.h"
+#include "../callchain.h"
+#include "../env.h"
+#include "../evsel.h"
+#include "../event.h"
+#include "../thread.h"
+#include "../comm.h"
+#include "../machine.h"
+#include "../mem-info.h"
+#include "../db-export.h"
+#include "../thread-stack.h"
+#include "../trace-event.h"
+#include "../call-path.h"
+#include "dwarf-regs.h"
+#include "map.h"
+#include "symbol.h"
+#include "thread_map.h"
+#include "print_binary.h"
+#include "stat.h"
+#include "mem-events.h"
+#include "util/perf_regs.h"
+
+#define _PyUnicode_FromString(arg) \
+  PyUnicode_FromString(arg)
+#define _PyUnicode_FromStringAndSize(arg1, arg2) \
+  PyUnicode_FromStringAndSize((arg1), (arg2))
+#define _PyBytes_FromStringAndSize(arg1, arg2) \
+  PyBytes_FromStringAndSize((arg1), (arg2))
+#define _PyLong_FromLong(arg) \
+  PyLong_FromLong(arg)
+#define _PyLong_AsLong(arg) \
+  PyLong_AsLong(arg)
+#define _PyCapsule_New(arg1, arg2, arg3) \
+  PyCapsule_New((arg1), (arg2), (arg3))
+
+PyMODINIT_FUNC PyInit_perf_trace_context(void);
+
+#ifdef HAVE_LIBTRACEEVENT
+#define TRACE_EVENT_TYPE_MAX				\
+	((1 << (sizeof(unsigned short) * 8)) - 1)
+
+#define N_COMMON_FIELDS	7
+
+static char *cur_field_name;
+static int zero_flag_atom;
+#endif
+
+#define MAX_FIELDS	64
+
+extern struct scripting_context *scripting_context;
+
+static PyObject *main_module, *main_dict;
+
+struct tables {
+	struct db_export	dbe;
+	PyObject		*evsel_handler;
+	PyObject		*machine_handler;
+	PyObject		*thread_handler;
+	PyObject		*comm_handler;
+	PyObject		*comm_thread_handler;
+	PyObject		*dso_handler;
+	PyObject		*symbol_handler;
+	PyObject		*branch_type_handler;
+	PyObject		*sample_handler;
+	PyObject		*call_path_handler;
+	PyObject		*call_return_handler;
+	PyObject		*synth_handler;
+	PyObject		*context_switch_handler;
+	bool			db_export_mode;
+};
+
+static struct tables tables_global;
+
+static void handler_call_die(const char *handler_name) __noreturn;
+static void handler_call_die(const char *handler_name)
+{
+	PyErr_Print();
+	Py_FatalError("problem in Python trace event handler");
+	// Py_FatalError does not return
+	// but we have to make the compiler happy
+	abort();
+}
+
+/*
+ * Insert val into the dictionary and decrement the reference counter.
+ * This is necessary for dictionaries since PyDict_SetItemString() does not
+ * steal a reference, as opposed to PyTuple_SetItem().
+ */
+static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
+{
+	PyDict_SetItemString(dict, key, val);
+	Py_DECREF(val);
+}
+
+static PyObject *get_handler(const char *handler_name)
+{
+	PyObject *handler;
+
+	handler = PyDict_GetItemString(main_dict, handler_name);
+	if (handler && !PyCallable_Check(handler))
+		return NULL;
+	return handler;
+}
+
+static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
+{
+	PyObject *retval;
+
+	retval = PyObject_CallObject(handler, args);
+	if (retval == NULL)
+		handler_call_die(die_msg);
+	Py_DECREF(retval);
+}
+
+static void try_call_object(const char *handler_name, PyObject *args)
+{
+	PyObject *handler;
+
+	handler = get_handler(handler_name);
+	if (handler)
+		call_object(handler, args, handler_name);
+}
+
+#ifdef HAVE_LIBTRACEEVENT
+static int get_argument_count(PyObject *handler)
+{
+	int arg_count = 0;
+
+	PyObject *code_obj = code_obj = PyObject_GetAttrString(handler, "__code__");
+	PyErr_Clear();
+	if (code_obj) {
+		PyObject *arg_count_obj = PyObject_GetAttrString(code_obj,
+			"co_argcount");
+		if (arg_count_obj) {
+			arg_count = (int) _PyLong_AsLong(arg_count_obj);
+			Py_DECREF(arg_count_obj);
+		}
+		Py_DECREF(code_obj);
+	}
+	return arg_count;
+}
+
+static void define_value(enum tep_print_arg_type field_type,
+			 const char *ev_name,
+			 const char *field_name,
+			 const char *field_value,
+			 const char *field_str)
+{
+	const char *handler_name = "define_flag_value";
+	PyObject *t;
+	unsigned long long value;
+	unsigned n = 0;
+
+	if (field_type == TEP_PRINT_SYMBOL)
+		handler_name = "define_symbolic_value";
+
+	t = PyTuple_New(4);
+	if (!t)
+		Py_FatalError("couldn't create Python tuple");
+
+	value = eval_flag(field_value);
+
+	PyTuple_SetItem(t, n++, _PyUnicode_FromString(ev_name));
+	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_name));
+	PyTuple_SetItem(t, n++, _PyLong_FromLong(value));
+	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_str));
+
+	try_call_object(handler_name, t);
+
+	Py_DECREF(t);
+}
+
+static void define_values(enum tep_print_arg_type field_type,
+			  struct tep_print_flag_sym *field,
+			  const char *ev_name,
+			  const char *field_name)
+{
+	define_value(field_type, ev_name, field_name, field->value,
+		     field->str);
+
+	if (field->next)
+		define_values(field_type, field->next, ev_name, field_name);
+}
+
+static void define_field(enum tep_print_arg_type field_type,
+			 const char *ev_name,
+			 const char *field_name,
+			 const char *delim)
+{
+	const char *handler_name = "define_flag_field";
+	PyObject *t;
+	unsigned n = 0;
+
+	if (field_type == TEP_PRINT_SYMBOL)
+		handler_name = "define_symbolic_field";
+
+	if (field_type == TEP_PRINT_FLAGS)
+		t = PyTuple_New(3);
+	else
+		t = PyTuple_New(2);
+	if (!t)
+		Py_FatalError("couldn't create Python tuple");
+
+	PyTuple_SetItem(t, n++, _PyUnicode_FromString(ev_name));
+	PyTuple_SetItem(t, n++, _PyUnicode_FromString(field_name));
+	if (field_type == TEP_PRINT_FLAGS)
+		PyTuple_SetItem(t, n++, _PyUnicode_FromString(delim));
+
+	try_call_object(handler_name, t);
+
+	Py_DECREF(t);
+}
+
+static void define_event_symbols(struct tep_event *event,
+				 const char *ev_name,
+				 struct tep_print_arg *args)
+{
+	if (args == NULL)
+		return;
+
+	switch (args->type) {
+	case TEP_PRINT_NULL:
+		break;
+	case TEP_PRINT_ATOM:
+		define_value(TEP_PRINT_FLAGS, ev_name, cur_field_name, "0",
+			     args->atom.atom);
+		zero_flag_atom = 0;
+		break;
+	case TEP_PRINT_FIELD:
+		free(cur_field_name);
+		cur_field_name = strdup(args->field.name);
+		break;
+	case TEP_PRINT_FLAGS:
+		define_event_symbols(event, ev_name, args->flags.field);
+		define_field(TEP_PRINT_FLAGS, ev_name, cur_field_name,
+			     args->flags.delim);
+		define_values(TEP_PRINT_FLAGS, args->flags.flags, ev_name,
+			      cur_field_name);
+		break;
+	case TEP_PRINT_SYMBOL:
+		define_event_symbols(event, ev_name, args->symbol.field);
+		define_field(TEP_PRINT_SYMBOL, ev_name, cur_field_name, NULL);
+		define_values(TEP_PRINT_SYMBOL, args->symbol.symbols, ev_name,
+			      cur_field_name);
+		break;
+	case TEP_PRINT_HEX:
+	case TEP_PRINT_HEX_STR:
+		define_event_symbols(event, ev_name, args->hex.field);
+		define_event_symbols(event, ev_name, args->hex.size);
+		break;
+	case TEP_PRINT_INT_ARRAY:
+		define_event_symbols(event, ev_name, args->int_array.field);
+		define_event_symbols(event, ev_name, args->int_array.count);
+		define_event_symbols(event, ev_name, args->int_array.el_size);
+		break;
+	case TEP_PRINT_STRING:
+		break;
+	case TEP_PRINT_TYPE:
+		define_event_symbols(event, ev_name, args->typecast.item);
+		break;
+	case TEP_PRINT_OP:
+		if (strcmp(args->op.op, ":") == 0)
+			zero_flag_atom = 1;
+		define_event_symbols(event, ev_name, args->op.left);
+		define_event_symbols(event, ev_name, args->op.right);
+		break;
+	default:
+		/* gcc warns for these? */
+	case TEP_PRINT_BSTRING:
+	case TEP_PRINT_DYNAMIC_ARRAY:
+	case TEP_PRINT_DYNAMIC_ARRAY_LEN:
+	case TEP_PRINT_FUNC:
+	case TEP_PRINT_BITMASK:
+		/* we should warn... */
+		return;
+	}
+
+	if (args->next)
+		define_event_symbols(event, ev_name, args->next);
+}
+
+static PyObject *get_field_numeric_entry(struct tep_event *event,
+		struct tep_format_field *field, void *data)
+{
+	bool is_array = field->flags & TEP_FIELD_IS_ARRAY;
+	PyObject *obj = NULL, *list = NULL;
+	unsigned long long val;
+	unsigned int item_size, n_items, i;
+
+	if (is_array) {
+		list = PyList_New(field->arraylen);
+		if (!list)
+			Py_FatalError("couldn't create Python list");
+		item_size = field->size / field->arraylen;
+		n_items = field->arraylen;
+	} else {
+		item_size = field->size;
+		n_items = 1;
+	}
+
+	for (i = 0; i < n_items; i++) {
+
+		val = read_size(event, data + field->offset + i * item_size,
+				item_size);
+		if (field->flags & TEP_FIELD_IS_SIGNED) {
+			if ((long long)val >= LONG_MIN &&
+					(long long)val <= LONG_MAX)
+				obj = _PyLong_FromLong(val);
+			else
+				obj = PyLong_FromLongLong(val);
+		} else {
+			if (val <= LONG_MAX)
+				obj = _PyLong_FromLong(val);
+			else
+				obj = PyLong_FromUnsignedLongLong(val);
+		}
+		if (is_array)
+			PyList_SET_ITEM(list, i, obj);
+	}
+	if (is_array)
+		obj = list;
+	return obj;
+}
+#endif
+
+static const char *get_dsoname(struct map *map)
+{
+	const char *dsoname = "[unknown]";
+	struct dso *dso = map ? map__dso(map) : NULL;
+
+	if (dso) {
+		if (symbol_conf.show_kernel_path && dso__long_name(dso))
+			dsoname = dso__long_name(dso);
+		else
+			dsoname = dso__name(dso);
+	}
+
+	return dsoname;
+}
+
+static unsigned long get_offset(struct symbol *sym, struct addr_location *al)
+{
+	unsigned long offset;
+
+	if (al->addr < sym->end)
+		offset = al->addr - sym->start;
+	else
+		offset = al->addr - map__start(al->map) - sym->start;
+
+	return offset;
+}
+
+static PyObject *python_process_callchain(struct perf_sample *sample,
+					 struct addr_location *al)
+{
+	PyObject *pylist;
+	struct callchain_cursor *cursor;
+
+	pylist = PyList_New(0);
+	if (!pylist)
+		Py_FatalError("couldn't create Python list");
+
+	if (!symbol_conf.use_callchain || !sample->callchain)
+		goto exit;
+
+	cursor = get_tls_callchain_cursor();
+	if (thread__resolve_callchain(al->thread, cursor,
+				      sample, NULL, NULL,
+				      scripting_max_stack) != 0) {
+		pr_err("Failed to resolve callchain. Skipping\n");
+		goto exit;
+	}
+	callchain_cursor_commit(cursor);
+
+
+	while (1) {
+		PyObject *pyelem;
+		struct callchain_cursor_node *node;
+		node = callchain_cursor_current(cursor);
+		if (!node)
+			break;
+
+		pyelem = PyDict_New();
+		if (!pyelem)
+			Py_FatalError("couldn't create Python dictionary");
+
+
+		pydict_set_item_string_decref(pyelem, "ip",
+				PyLong_FromUnsignedLongLong(node->ip));
+
+		if (node->ms.sym) {
+			PyObject *pysym  = PyDict_New();
+			if (!pysym)
+				Py_FatalError("couldn't create Python dictionary");
+			pydict_set_item_string_decref(pysym, "start",
+					PyLong_FromUnsignedLongLong(node->ms.sym->start));
+			pydict_set_item_string_decref(pysym, "end",
+					PyLong_FromUnsignedLongLong(node->ms.sym->end));
+			pydict_set_item_string_decref(pysym, "binding",
+					_PyLong_FromLong(symbol__binding(node->ms.sym)));
+			pydict_set_item_string_decref(pysym, "name",
+					_PyUnicode_FromStringAndSize(node->ms.sym->name,
+							node->ms.sym->namelen));
+			pydict_set_item_string_decref(pyelem, "sym", pysym);
+
+			if (node->ms.map) {
+				struct map *map = node->ms.map;
+				struct addr_location node_al;
+				unsigned long offset;
+
+				addr_location__init(&node_al);
+				node_al.addr = map__map_ip(map, node->ip);
+				node_al.map  = map__get(map);
+				offset = get_offset(node->ms.sym, &node_al);
+				addr_location__exit(&node_al);
+
+				pydict_set_item_string_decref(
+					pyelem, "sym_off",
+					PyLong_FromUnsignedLongLong(offset));
+			}
+			if (node->srcline && strcmp(":0", node->srcline)) {
+				pydict_set_item_string_decref(
+					pyelem, "sym_srcline",
+					_PyUnicode_FromString(node->srcline));
+			}
+		}
+
+		if (node->ms.map) {
+			const char *dsoname = get_dsoname(node->ms.map);
+
+			pydict_set_item_string_decref(pyelem, "dso",
+					_PyUnicode_FromString(dsoname));
+		}
+
+		callchain_cursor_advance(cursor);
+		PyList_Append(pylist, pyelem);
+		Py_DECREF(pyelem);
+	}
+
+exit:
+	return pylist;
+}
+
+static PyObject *python_process_brstack(struct perf_sample *sample,
+					struct thread *thread)
+{
+	struct branch_stack *br = sample->branch_stack;
+	struct branch_entry *entries = perf_sample__branch_entries(sample);
+	PyObject *pylist;
+	u64 i;
+
+	pylist = PyList_New(0);
+	if (!pylist)
+		Py_FatalError("couldn't create Python list");
+
+	if (!(br && br->nr))
+		goto exit;
+
+	for (i = 0; i < br->nr; i++) {
+		PyObject *pyelem;
+		struct addr_location al;
+		const char *dsoname;
+
+		pyelem = PyDict_New();
+		if (!pyelem)
+			Py_FatalError("couldn't create Python dictionary");
+
+		pydict_set_item_string_decref(pyelem, "from",
+		    PyLong_FromUnsignedLongLong(entries[i].from));
+		pydict_set_item_string_decref(pyelem, "to",
+		    PyLong_FromUnsignedLongLong(entries[i].to));
+		pydict_set_item_string_decref(pyelem, "mispred",
+		    PyBool_FromLong(entries[i].flags.mispred));
+		pydict_set_item_string_decref(pyelem, "predicted",
+		    PyBool_FromLong(entries[i].flags.predicted));
+		pydict_set_item_string_decref(pyelem, "in_tx",
+		    PyBool_FromLong(entries[i].flags.in_tx));
+		pydict_set_item_string_decref(pyelem, "abort",
+		    PyBool_FromLong(entries[i].flags.abort));
+		pydict_set_item_string_decref(pyelem, "cycles",
+		    PyLong_FromUnsignedLongLong(entries[i].flags.cycles));
+
+		addr_location__init(&al);
+		thread__find_map_fb(thread, sample->cpumode,
+				    entries[i].from, &al);
+		dsoname = get_dsoname(al.map);
+		pydict_set_item_string_decref(pyelem, "from_dsoname",
+					      _PyUnicode_FromString(dsoname));
+
+		thread__find_map_fb(thread, sample->cpumode,
+				    entries[i].to, &al);
+		dsoname = get_dsoname(al.map);
+		pydict_set_item_string_decref(pyelem, "to_dsoname",
+					      _PyUnicode_FromString(dsoname));
+
+		addr_location__exit(&al);
+		PyList_Append(pylist, pyelem);
+		Py_DECREF(pyelem);
+	}
+
+exit:
+	return pylist;
+}
+
+static int get_symoff(struct symbol *sym, struct addr_location *al,
+		      bool print_off, char *bf, int size)
+{
+	unsigned long offset;
+
+	if (!sym || !sym->name[0])
+		return scnprintf(bf, size, "%s", "[unknown]");
+
+	if (!print_off)
+		return scnprintf(bf, size, "%s", sym->name);
+
+	offset = get_offset(sym, al);
+
+	return scnprintf(bf, size, "%s+0x%x", sym->name, offset);
+}
+
+static int get_br_mspred(struct branch_flags *flags, char *bf, int size)
+{
+	if (!flags->mispred  && !flags->predicted)
+		return scnprintf(bf, size, "%s", "-");
+
+	if (flags->mispred)
+		return scnprintf(bf, size, "%s", "M");
+
+	return scnprintf(bf, size, "%s", "P");
+}
+
+static PyObject *python_process_brstacksym(struct perf_sample *sample,
+					   struct thread *thread)
+{
+	struct branch_stack *br = sample->branch_stack;
+	struct branch_entry *entries = perf_sample__branch_entries(sample);
+	PyObject *pylist;
+	u64 i;
+	char bf[512];
+
+	pylist = PyList_New(0);
+	if (!pylist)
+		Py_FatalError("couldn't create Python list");
+
+	if (!(br && br->nr))
+		goto exit;
+
+	for (i = 0; i < br->nr; i++) {
+		PyObject *pyelem;
+		struct addr_location al;
+
+		addr_location__init(&al);
+		pyelem = PyDict_New();
+		if (!pyelem)
+			Py_FatalError("couldn't create Python dictionary");
+
+		thread__find_symbol_fb(thread, sample->cpumode,
+				       entries[i].from, &al);
+		get_symoff(al.sym, &al, true, bf, sizeof(bf));
+		pydict_set_item_string_decref(pyelem, "from",
+					      _PyUnicode_FromString(bf));
+
+		thread__find_symbol_fb(thread, sample->cpumode,
+				       entries[i].to, &al);
+		get_symoff(al.sym, &al, true, bf, sizeof(bf));
+		pydict_set_item_string_decref(pyelem, "to",
+					      _PyUnicode_FromString(bf));
+
+		get_br_mspred(&entries[i].flags, bf, sizeof(bf));
+		pydict_set_item_string_decref(pyelem, "pred",
+					      _PyUnicode_FromString(bf));
+
+		if (entries[i].flags.in_tx) {
+			pydict_set_item_string_decref(pyelem, "in_tx",
+					      _PyUnicode_FromString("X"));
+		} else {
+			pydict_set_item_string_decref(pyelem, "in_tx",
+					      _PyUnicode_FromString("-"));
+		}
+
+		if (entries[i].flags.abort) {
+			pydict_set_item_string_decref(pyelem, "abort",
+					      _PyUnicode_FromString("A"));
+		} else {
+			pydict_set_item_string_decref(pyelem, "abort",
+					      _PyUnicode_FromString("-"));
+		}
+
+		PyList_Append(pylist, pyelem);
+		Py_DECREF(pyelem);
+		addr_location__exit(&al);
+	}
+
+exit:
+	return pylist;
+}
+
+static PyObject *get_sample_value_as_tuple(struct sample_read_value *value,
+					   u64 read_format)
+{
+	PyObject *t;
+
+	t = PyTuple_New(3);
+	if (!t)
+		Py_FatalError("couldn't create Python tuple");
+	PyTuple_SetItem(t, 0, PyLong_FromUnsignedLongLong(value->id));
+	PyTuple_SetItem(t, 1, PyLong_FromUnsignedLongLong(value->value));
+	if (read_format & PERF_FORMAT_LOST)
+		PyTuple_SetItem(t, 2, PyLong_FromUnsignedLongLong(value->lost));
+
+	return t;
+}
+
+static void set_sample_read_in_dict(PyObject *dict_sample, struct perf_sample *sample)
+{
+	u64 read_format = sample->evsel->core.attr.read_format;
+	PyObject *values;
+	unsigned int i;
+
+	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
+		pydict_set_item_string_decref(dict_sample, "time_enabled",
+			PyLong_FromUnsignedLongLong(sample->read.time_enabled));
+	}
+
+	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
+		pydict_set_item_string_decref(dict_sample, "time_running",
+			PyLong_FromUnsignedLongLong(sample->read.time_running));
+	}
+
+	if (read_format & PERF_FORMAT_GROUP)
+		values = PyList_New(sample->read.group.nr);
+	else
+		values = PyList_New(1);
+
+	if (!values)
+		Py_FatalError("couldn't create Python list");
+
+	if (read_format & PERF_FORMAT_GROUP) {
+		struct sample_read_value *v = sample->read.group.values;
+
+		i = 0;
+		sample_read_group__for_each(v, sample->read.group.nr, read_format) {
+			PyObject *t = get_sample_value_as_tuple(v, read_format);
+			PyList_SET_ITEM(values, i, t);
+			i++;
+		}
+	} else {
+		PyObject *t = get_sample_value_as_tuple(&sample->read.one,
+							read_format);
+		PyList_SET_ITEM(values, 0, t);
+	}
+	pydict_set_item_string_decref(dict_sample, "values", values);
+}
+
+static void set_sample_datasrc_in_dict(PyObject *dict,
+				      struct perf_sample *sample)
+{
+	struct mem_info *mi = mem_info__new();
+	char decode[100];
+
+	if (!mi)
+		Py_FatalError("couldn't create mem-info");
+
+	pydict_set_item_string_decref(dict, "datasrc",
+			PyLong_FromUnsignedLongLong(sample->data_src));
+
+	mem_info__data_src(mi)->val = sample->data_src;
+	perf_script__meminfo_scnprintf(decode, 100, mi);
+	mem_info__put(mi);
+
+	pydict_set_item_string_decref(dict, "datasrc_decode",
+			_PyUnicode_FromString(decode));
+}
+
+static void regs_map(struct regs_dump *regs, uint64_t mask, uint16_t e_machine, uint32_t e_flags,
+		     char *bf, int size)
+{
+	unsigned int i = 0, r;
+	int printed = 0;
+
+	bf[0] = 0;
+
+	if (size <= 0)
+		return;
+
+	if (!regs || !regs->regs)
+		return;
+
+	for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
+		u64 val = regs->regs[i++];
+
+		printed += scnprintf(bf + printed, size - printed,
+				     "%5s:0x%" PRIx64 " ",
+				     perf_reg_name(r, e_machine, e_flags), val);
+	}
+}
+
+#define MAX_REG_SIZE 128
+
+static int set_regs_in_dict(PyObject *dict,
+			     struct perf_sample *sample,
+			     uint16_t e_machine,
+			     uint32_t e_flags)
+{
+	struct perf_event_attr *attr = &sample->evsel->core.attr;
+
+	int size = (__sw_hweight64(attr->sample_regs_intr) * MAX_REG_SIZE) + 1;
+	char *bf = NULL;
+
+	if (sample->intr_regs) {
+		bf = malloc(size);
+		if (!bf)
+			return -1;
+
+		regs_map(sample->intr_regs, attr->sample_regs_intr, e_machine, e_flags, bf, size);
+
+		pydict_set_item_string_decref(dict, "iregs",
+					_PyUnicode_FromString(bf));
+	}
+
+	if (sample->user_regs) {
+		if (!bf) {
+			bf = malloc(size);
+			if (!bf)
+				return -1;
+		}
+		regs_map(sample->user_regs, attr->sample_regs_user, e_machine, e_flags, bf, size);
+
+		pydict_set_item_string_decref(dict, "uregs",
+					_PyUnicode_FromString(bf));
+	}
+	free(bf);
+
+	return 0;
+}
+
+static void set_sym_in_dict(PyObject *dict, struct addr_location *al,
+			    const char *dso_field, const char *dso_bid_field,
+			    const char *dso_map_start, const char *dso_map_end,
+			    const char *sym_field, const char *symoff_field,
+			    const char *map_pgoff)
+{
+	if (al->map) {
+		char sbuild_id[SBUILD_ID_SIZE];
+		struct dso *dso = map__dso(al->map);
+
+		pydict_set_item_string_decref(dict, dso_field,
+					      _PyUnicode_FromString(dso__name(dso)));
+		build_id__snprintf(dso__bid(dso), sbuild_id, sizeof(sbuild_id));
+		pydict_set_item_string_decref(dict, dso_bid_field,
+			_PyUnicode_FromString(sbuild_id));
+		pydict_set_item_string_decref(dict, dso_map_start,
+			PyLong_FromUnsignedLong(map__start(al->map)));
+		pydict_set_item_string_decref(dict, dso_map_end,
+			PyLong_FromUnsignedLong(map__end(al->map)));
+		pydict_set_item_string_decref(dict, map_pgoff,
+			PyLong_FromUnsignedLongLong(map__pgoff(al->map)));
+	}
+	if (al->sym) {
+		pydict_set_item_string_decref(dict, sym_field,
+			_PyUnicode_FromString(al->sym->name));
+		pydict_set_item_string_decref(dict, symoff_field,
+			PyLong_FromUnsignedLong(get_offset(al->sym, al)));
+	}
+}
+
+static void set_sample_flags(PyObject *dict, u32 flags)
+{
+	const char *ch = PERF_IP_FLAG_CHARS;
+	char *p, str[33];
+
+	for (p = str; *ch; ch++, flags >>= 1) {
+		if (flags & 1)
+			*p++ = *ch;
+	}
+	*p = 0;
+	pydict_set_item_string_decref(dict, "flags", _PyUnicode_FromString(str));
+}
+
+static void python_process_sample_flags(struct perf_sample *sample, PyObject *dict_sample)
+{
+	char flags_disp[SAMPLE_FLAGS_BUF_SIZE];
+
+	set_sample_flags(dict_sample, sample->flags);
+	perf_sample__sprintf_flags(sample->flags, flags_disp, sizeof(flags_disp));
+	pydict_set_item_string_decref(dict_sample, "flags_disp",
+		_PyUnicode_FromString(flags_disp));
+}
+
+static PyObject *get_perf_sample_dict(struct perf_sample *sample,
+					 struct addr_location *al,
+					 struct addr_location *addr_al,
+					 PyObject *callchain)
+{
+	PyObject *dict, *dict_sample, *brstack, *brstacksym;
+	uint16_t e_machine = EM_HOST;
+	uint32_t e_flags = EF_HOST;
+	struct evsel *evsel = sample->evsel;
+
+	dict = PyDict_New();
+	if (!dict)
+		Py_FatalError("couldn't create Python dictionary");
+
+	dict_sample = PyDict_New();
+	if (!dict_sample)
+		Py_FatalError("couldn't create Python dictionary");
+
+	pydict_set_item_string_decref(dict, "ev_name", _PyUnicode_FromString(evsel__name(evsel)));
+	pydict_set_item_string_decref(dict, "attr", _PyBytes_FromStringAndSize((const char *)&evsel->core.attr, sizeof(evsel->core.attr)));
+
+	pydict_set_item_string_decref(dict_sample, "id",
+			PyLong_FromUnsignedLongLong(sample->id));
+	pydict_set_item_string_decref(dict_sample, "stream_id",
+			PyLong_FromUnsignedLongLong(sample->stream_id));
+	pydict_set_item_string_decref(dict_sample, "pid",
+			_PyLong_FromLong(sample->pid));
+	pydict_set_item_string_decref(dict_sample, "tid",
+			_PyLong_FromLong(sample->tid));
+	pydict_set_item_string_decref(dict_sample, "cpu",
+			_PyLong_FromLong(sample->cpu));
+	pydict_set_item_string_decref(dict_sample, "ip",
+			PyLong_FromUnsignedLongLong(sample->ip));
+	pydict_set_item_string_decref(dict_sample, "time",
+			PyLong_FromUnsignedLongLong(sample->time));
+	pydict_set_item_string_decref(dict_sample, "period",
+			PyLong_FromUnsignedLongLong(sample->period));
+	pydict_set_item_string_decref(dict_sample, "phys_addr",
+			PyLong_FromUnsignedLongLong(sample->phys_addr));
+	pydict_set_item_string_decref(dict_sample, "addr",
+			PyLong_FromUnsignedLongLong(sample->addr));
+	set_sample_read_in_dict(dict_sample, sample);
+	pydict_set_item_string_decref(dict_sample, "weight",
+			PyLong_FromUnsignedLongLong(sample->weight));
+	pydict_set_item_string_decref(dict_sample, "ins_lat",
+			PyLong_FromUnsignedLong(sample->ins_lat));
+	pydict_set_item_string_decref(dict_sample, "transaction",
+			PyLong_FromUnsignedLongLong(sample->transaction));
+	set_sample_datasrc_in_dict(dict_sample, sample);
+	pydict_set_item_string_decref(dict, "sample", dict_sample);
+
+	pydict_set_item_string_decref(dict, "raw_buf", _PyBytes_FromStringAndSize(
+			(const char *)sample->raw_data, sample->raw_size));
+	pydict_set_item_string_decref(dict, "comm",
+			_PyUnicode_FromString(thread__comm_str(al->thread)));
+	set_sym_in_dict(dict, al, "dso", "dso_bid", "dso_map_start", "dso_map_end",
+			"symbol", "symoff", "map_pgoff");
+
+	pydict_set_item_string_decref(dict, "callchain", callchain);
+
+	brstack = python_process_brstack(sample, al->thread);
+	pydict_set_item_string_decref(dict, "brstack", brstack);
+
+	brstacksym = python_process_brstacksym(sample, al->thread);
+	pydict_set_item_string_decref(dict, "brstacksym", brstacksym);
+
+	if (sample->machine_pid) {
+		pydict_set_item_string_decref(dict_sample, "machine_pid",
+				_PyLong_FromLong(sample->machine_pid));
+		pydict_set_item_string_decref(dict_sample, "vcpu",
+				_PyLong_FromLong(sample->vcpu));
+	}
+
+	pydict_set_item_string_decref(dict_sample, "cpumode",
+			_PyLong_FromLong((unsigned long)sample->cpumode));
+
+	if (addr_al) {
+		pydict_set_item_string_decref(dict_sample, "addr_correlates_sym",
+			PyBool_FromLong(1));
+		set_sym_in_dict(dict_sample, addr_al, "addr_dso", "addr_dso_bid",
+				"addr_dso_map_start", "addr_dso_map_end",
+				"addr_symbol", "addr_symoff", "addr_map_pgoff");
+	}
+
+	if (sample->flags)
+		python_process_sample_flags(sample, dict_sample);
+
+	/* Instructions per cycle (IPC) */
+	if (sample->insn_cnt && sample->cyc_cnt) {
+		pydict_set_item_string_decref(dict_sample, "insn_cnt",
+			PyLong_FromUnsignedLongLong(sample->insn_cnt));
+		pydict_set_item_string_decref(dict_sample, "cyc_cnt",
+			PyLong_FromUnsignedLongLong(sample->cyc_cnt));
+	}
+
+	if (al->thread)
+		e_machine = thread__e_machine(al->thread, /*machine=*/NULL, &e_flags);
+
+	if (set_regs_in_dict(dict, sample, e_machine, e_flags))
+		Py_FatalError("Failed to setting regs in dict");
+
+	return dict;
+}
+
+#ifdef HAVE_LIBTRACEEVENT
+static void python_process_tracepoint(struct perf_sample *sample,
+				      struct addr_location *al,
+				      struct addr_location *addr_al)
+{
+	struct tep_event *event;
+	PyObject *handler, *context, *t, *obj = NULL, *callchain;
+	PyObject *dict = NULL, *all_entries_dict = NULL;
+	static char handler_name[256];
+	struct tep_format_field *field;
+	unsigned long s, ns;
+	unsigned n = 0;
+	int pid;
+	int cpu = sample->cpu;
+	void *data = sample->raw_data;
+	unsigned long long nsecs = sample->time;
+	const char *comm = thread__comm_str(al->thread);
+	const char *default_handler_name = "trace_unhandled";
+	DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
+	struct evsel *evsel = sample->evsel;
+
+	bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX);
+
+	event = evsel__tp_format(evsel);
+	if (!event) {
+		snprintf(handler_name, sizeof(handler_name),
+			 "ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
+		Py_FatalError(handler_name);
+	}
+
+	pid = raw_field_value(event, "common_pid", data);
+
+	sprintf(handler_name, "%s__%s", event->system, event->name);
+
+	if (!__test_and_set_bit(event->id, events_defined))
+		define_event_symbols(event, handler_name, event->print_fmt.args);
+
+	handler = get_handler(handler_name);
+	if (!handler) {
+		handler = get_handler(default_handler_name);
+		if (!handler)
+			return;
+		dict = PyDict_New();
+		if (!dict)
+			Py_FatalError("couldn't create Python dict");
+	}
+
+	t = PyTuple_New(MAX_FIELDS);
+	if (!t)
+		Py_FatalError("couldn't create Python tuple");
+
+
+	s = nsecs / NSEC_PER_SEC;
+	ns = nsecs - s * NSEC_PER_SEC;
+
+	context = _PyCapsule_New(scripting_context, NULL, NULL);
+
+	PyTuple_SetItem(t, n++, _PyUnicode_FromString(handler_name));
+	PyTuple_SetItem(t, n++, context);
+
+	/* ip unwinding */
+	callchain = python_process_callchain(sample, al);
+	/* Need an additional reference for the perf_sample dict */
+	Py_INCREF(callchain);
+
+	if (!dict) {
+		PyTuple_SetItem(t, n++, _PyLong_FromLong(cpu));
+		PyTuple_SetItem(t, n++, _PyLong_FromLong(s));
+		PyTuple_SetItem(t, n++, _PyLong_FromLong(ns));
+		PyTuple_SetItem(t, n++, _PyLong_FromLong(pid));
+		PyTuple_SetItem(t, n++, _PyUnicode_FromString(comm));
+		PyTuple_SetItem(t, n++, callchain);
+	} else {
+		pydict_set_item_string_decref(dict, "common_cpu", _PyLong_FromLong(cpu));
+		pydict_set_item_string_decref(dict, "common_s", _PyLong_FromLong(s));
+		pydict_set_item_string_decref(dict, "common_ns", _PyLong_FromLong(ns));
+		pydict_set_item_string_decref(dict, "common_pid", _PyLong_FromLong(pid));
+		pydict_set_item_string_decref(dict, "common_comm", _PyUnicode_FromString(comm));
+		pydict_set_item_string_decref(dict, "common_callchain", callchain);
+	}
+	for (field = event->format.fields; field; field = field->next) {
+		unsigned int offset, len;
+		unsigned long long val;
+
+		if (field->flags & TEP_FIELD_IS_ARRAY) {
+			offset = field->offset;
+			len    = field->size;
+			if (field->flags & TEP_FIELD_IS_DYNAMIC) {
+				val     = tep_read_number(scripting_context->pevent,
+							  data + offset, len);
+				offset  = val;
+				len     = offset >> 16;
+				offset &= 0xffff;
+				if (tep_field_is_relative(field->flags))
+					offset += field->offset + field->size;
+			}
+			if (field->flags & TEP_FIELD_IS_STRING &&
+			    is_printable_array(data + offset, len)) {
+				obj = _PyUnicode_FromString((char *) data + offset);
+			} else {
+				obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
+				field->flags &= ~TEP_FIELD_IS_STRING;
+			}
+		} else { /* FIELD_IS_NUMERIC */
+			obj = get_field_numeric_entry(event, field, data);
+		}
+		if (!dict)
+			PyTuple_SetItem(t, n++, obj);
+		else
+			pydict_set_item_string_decref(dict, field->name, obj);
+
+	}
+
+	if (dict)
+		PyTuple_SetItem(t, n++, dict);
+
+	if (get_argument_count(handler) == (int) n + 1) {
+		all_entries_dict = get_perf_sample_dict(sample, al, addr_al,
+			callchain);
+		PyTuple_SetItem(t, n++,	all_entries_dict);
+	} else {
+		Py_DECREF(callchain);
+	}
+
+	if (_PyTuple_Resize(&t, n) == -1)
+		Py_FatalError("error resizing Python tuple");
+
+	if (!dict)
+		call_object(handler, t, handler_name);
+	else
+		call_object(handler, t, default_handler_name);
+
+	Py_DECREF(t);
+}
+#else
+static void python_process_tracepoint(struct perf_sample *sample __maybe_unused,
+				      struct addr_location *al __maybe_unused,
+				      struct addr_location *addr_al __maybe_unused)
+{
+	fprintf(stderr, "Tracepoint events are not supported because "
+			"perf is not linked with libtraceevent.\n");
+}
+#endif
+
+static PyObject *tuple_new(unsigned int sz)
+{
+	PyObject *t;
+
+	t = PyTuple_New(sz);
+	if (!t)
+		Py_FatalError("couldn't create Python tuple");
+	return t;
+}
+
+static int tuple_set_s64(PyObject *t, unsigned int pos, s64 val)
+{
+#if BITS_PER_LONG == 64
+	return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
+#endif
+#if BITS_PER_LONG == 32
+	return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
+#endif
+}
+
+/*
+ * Databases support only signed 64-bit numbers, so even though we are
+ * exporting a u64, it must be as s64.
+ */
+#define tuple_set_d64 tuple_set_s64
+
+static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
+{
+#if BITS_PER_LONG == 64
+	return PyTuple_SetItem(t, pos, PyLong_FromUnsignedLong(val));
+#endif
+#if BITS_PER_LONG == 32
+	return PyTuple_SetItem(t, pos, PyLong_FromUnsignedLongLong(val));
+#endif
+}
+
+static int tuple_set_u32(PyObject *t, unsigned int pos, u32 val)
+{
+	return PyTuple_SetItem(t, pos, PyLong_FromUnsignedLong(val));
+}
+
+static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
+{
+	return PyTuple_SetItem(t, pos, _PyLong_FromLong(val));
+}
+
+static int tuple_set_bool(PyObject *t, unsigned int pos, bool val)
+{
+	return PyTuple_SetItem(t, pos, PyBool_FromLong(val));
+}
+
+static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
+{
+	return PyTuple_SetItem(t, pos, _PyUnicode_FromString(s));
+}
+
+static int tuple_set_bytes(PyObject *t, unsigned int pos, void *bytes,
+			   unsigned int sz)
+{
+	return PyTuple_SetItem(t, pos, _PyBytes_FromStringAndSize(bytes, sz));
+}
+
+static int python_export_evsel(struct db_export *dbe, struct evsel *evsel)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(2);
+
+	tuple_set_d64(t, 0, evsel->db_id);
+	tuple_set_string(t, 1, evsel__name(evsel));
+
+	call_object(tables->evsel_handler, t, "evsel_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_machine(struct db_export *dbe,
+				 struct machine *machine)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(3);
+
+	tuple_set_d64(t, 0, machine->db_id);
+	tuple_set_s32(t, 1, machine->pid);
+	tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
+
+	call_object(tables->machine_handler, t, "machine_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_thread(struct db_export *dbe, struct thread *thread,
+				u64 main_thread_db_id, struct machine *machine)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(5);
+
+	tuple_set_d64(t, 0, thread__db_id(thread));
+	tuple_set_d64(t, 1, machine->db_id);
+	tuple_set_d64(t, 2, main_thread_db_id);
+	tuple_set_s32(t, 3, thread__pid(thread));
+	tuple_set_s32(t, 4, thread__tid(thread));
+
+	call_object(tables->thread_handler, t, "thread_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_comm(struct db_export *dbe, struct comm *comm,
+			      struct thread *thread)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(5);
+
+	tuple_set_d64(t, 0, comm->db_id);
+	tuple_set_string(t, 1, comm__str(comm));
+	tuple_set_d64(t, 2, thread__db_id(thread));
+	tuple_set_d64(t, 3, comm->start);
+	tuple_set_s32(t, 4, comm->exec);
+
+	call_object(tables->comm_handler, t, "comm_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
+				     struct comm *comm, struct thread *thread)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(3);
+
+	tuple_set_d64(t, 0, db_id);
+	tuple_set_d64(t, 1, comm->db_id);
+	tuple_set_d64(t, 2, thread__db_id(thread));
+
+	call_object(tables->comm_thread_handler, t, "comm_thread_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_dso(struct db_export *dbe, struct dso *dso,
+			     struct machine *machine)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	char sbuild_id[SBUILD_ID_SIZE];
+	PyObject *t;
+
+	build_id__snprintf(dso__bid(dso), sbuild_id, sizeof(sbuild_id));
+
+	t = tuple_new(5);
+
+	tuple_set_d64(t, 0, dso__db_id(dso));
+	tuple_set_d64(t, 1, machine->db_id);
+	tuple_set_string(t, 2, dso__short_name(dso));
+	tuple_set_string(t, 3, dso__long_name(dso));
+	tuple_set_string(t, 4, sbuild_id);
+
+	call_object(tables->dso_handler, t, "dso_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
+				struct dso *dso)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	u64 *sym_db_id = symbol__priv(sym);
+	PyObject *t;
+
+	t = tuple_new(6);
+
+	tuple_set_d64(t, 0, *sym_db_id);
+	tuple_set_d64(t, 1, dso__db_id(dso));
+	tuple_set_d64(t, 2, sym->start);
+	tuple_set_d64(t, 3, sym->end);
+	tuple_set_s32(t, 4, symbol__binding(sym));
+	tuple_set_string(t, 5, sym->name);
+
+	call_object(tables->symbol_handler, t, "symbol_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_branch_type(struct db_export *dbe, u32 branch_type,
+				     const char *name)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(2);
+
+	tuple_set_s32(t, 0, branch_type);
+	tuple_set_string(t, 1, name);
+
+	call_object(tables->branch_type_handler, t, "branch_type_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static void python_export_sample_table(struct db_export *dbe,
+				       struct export_sample *es)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(28);
+
+	tuple_set_d64(t, 0, es->db_id);
+	tuple_set_d64(t, 1, es->sample->evsel->db_id);
+	tuple_set_d64(t, 2, maps__machine(thread__maps(es->al->thread))->db_id);
+	tuple_set_d64(t, 3, thread__db_id(es->al->thread));
+	tuple_set_d64(t, 4, es->comm_db_id);
+	tuple_set_d64(t, 5, es->dso_db_id);
+	tuple_set_d64(t, 6, es->sym_db_id);
+	tuple_set_d64(t, 7, es->offset);
+	tuple_set_d64(t, 8, es->sample->ip);
+	tuple_set_d64(t, 9, es->sample->time);
+	tuple_set_s32(t, 10, es->sample->cpu);
+	tuple_set_d64(t, 11, es->addr_dso_db_id);
+	tuple_set_d64(t, 12, es->addr_sym_db_id);
+	tuple_set_d64(t, 13, es->addr_offset);
+	tuple_set_d64(t, 14, es->sample->addr);
+	tuple_set_d64(t, 15, es->sample->period);
+	tuple_set_d64(t, 16, es->sample->weight);
+	tuple_set_d64(t, 17, es->sample->transaction);
+	tuple_set_d64(t, 18, es->sample->data_src);
+	tuple_set_s32(t, 19, es->sample->flags & PERF_BRANCH_MASK);
+	tuple_set_s32(t, 20, !!(es->sample->flags & PERF_IP_FLAG_IN_TX));
+	tuple_set_d64(t, 21, es->call_path_id);
+	tuple_set_d64(t, 22, es->sample->insn_cnt);
+	tuple_set_d64(t, 23, es->sample->cyc_cnt);
+	tuple_set_s32(t, 24, es->sample->flags);
+	tuple_set_d64(t, 25, es->sample->id);
+	tuple_set_d64(t, 26, es->sample->stream_id);
+	tuple_set_u32(t, 27, es->sample->ins_lat);
+
+	call_object(tables->sample_handler, t, "sample_table");
+
+	Py_DECREF(t);
+}
+
+static void python_export_synth(struct db_export *dbe, struct export_sample *es)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(3);
+
+	tuple_set_d64(t, 0, es->db_id);
+	tuple_set_d64(t, 1, es->sample->evsel->core.attr.config);
+	tuple_set_bytes(t, 2, es->sample->raw_data, es->sample->raw_size);
+
+	call_object(tables->synth_handler, t, "synth_data");
+
+	Py_DECREF(t);
+}
+
+static int python_export_sample(struct db_export *dbe,
+				struct export_sample *es)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+
+	python_export_sample_table(dbe, es);
+
+	if (es->sample->evsel->core.attr.type == PERF_TYPE_SYNTH && tables->synth_handler)
+		python_export_synth(dbe, es);
+
+	return 0;
+}
+
+static int python_export_call_path(struct db_export *dbe, struct call_path *cp)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+	u64 parent_db_id, sym_db_id;
+
+	parent_db_id = cp->parent ? cp->parent->db_id : 0;
+	sym_db_id = cp->sym ? *(u64 *)symbol__priv(cp->sym) : 0;
+
+	t = tuple_new(4);
+
+	tuple_set_d64(t, 0, cp->db_id);
+	tuple_set_d64(t, 1, parent_db_id);
+	tuple_set_d64(t, 2, sym_db_id);
+	tuple_set_d64(t, 3, cp->ip);
+
+	call_object(tables->call_path_handler, t, "call_path_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_call_return(struct db_export *dbe,
+				     struct call_return *cr)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	u64 comm_db_id = cr->comm ? cr->comm->db_id : 0;
+	PyObject *t;
+
+	t = tuple_new(14);
+
+	tuple_set_d64(t, 0, cr->db_id);
+	tuple_set_d64(t, 1, thread__db_id(cr->thread));
+	tuple_set_d64(t, 2, comm_db_id);
+	tuple_set_d64(t, 3, cr->cp->db_id);
+	tuple_set_d64(t, 4, cr->call_time);
+	tuple_set_d64(t, 5, cr->return_time);
+	tuple_set_d64(t, 6, cr->branch_count);
+	tuple_set_d64(t, 7, cr->call_ref);
+	tuple_set_d64(t, 8, cr->return_ref);
+	tuple_set_d64(t, 9, cr->cp->parent->db_id);
+	tuple_set_s32(t, 10, cr->flags);
+	tuple_set_d64(t, 11, cr->parent_db_id);
+	tuple_set_d64(t, 12, cr->insn_count);
+	tuple_set_d64(t, 13, cr->cyc_count);
+
+	call_object(tables->call_return_handler, t, "call_return_table");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_export_context_switch(struct db_export *dbe, u64 db_id,
+					struct machine *machine,
+					struct perf_sample *sample,
+					u64 th_out_id, u64 comm_out_id,
+					u64 th_in_id, u64 comm_in_id, int flags)
+{
+	struct tables *tables = container_of(dbe, struct tables, dbe);
+	PyObject *t;
+
+	t = tuple_new(9);
+
+	tuple_set_d64(t, 0, db_id);
+	tuple_set_d64(t, 1, machine->db_id);
+	tuple_set_d64(t, 2, sample->time);
+	tuple_set_s32(t, 3, sample->cpu);
+	tuple_set_d64(t, 4, th_out_id);
+	tuple_set_d64(t, 5, comm_out_id);
+	tuple_set_d64(t, 6, th_in_id);
+	tuple_set_d64(t, 7, comm_in_id);
+	tuple_set_s32(t, 8, flags);
+
+	call_object(tables->context_switch_handler, t, "context_switch");
+
+	Py_DECREF(t);
+
+	return 0;
+}
+
+static int python_process_call_return(struct call_return *cr, u64 *parent_db_id,
+				      void *data)
+{
+	struct db_export *dbe = data;
+
+	return db_export__call_return(dbe, cr, parent_db_id);
+}
+
+static void python_process_general_event(struct perf_sample *sample,
+					 struct addr_location *al,
+					 struct addr_location *addr_al)
+{
+	PyObject *handler, *t, *dict, *callchain;
+	static char handler_name[64];
+	unsigned n = 0;
+
+	snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
+
+	handler = get_handler(handler_name);
+	if (!handler)
+		return;
+
+	/*
+	 * Use the MAX_FIELDS to make the function expandable, though
+	 * currently there is only one item for the tuple.
+	 */
+	t = PyTuple_New(MAX_FIELDS);
+	if (!t)
+		Py_FatalError("couldn't create Python tuple");
+
+	/* ip unwinding */
+	callchain = python_process_callchain(sample, al);
+	dict = get_perf_sample_dict(sample, al, addr_al, callchain);
+
+	PyTuple_SetItem(t, n++, dict);
+	if (_PyTuple_Resize(&t, n) == -1)
+		Py_FatalError("error resizing Python tuple");
+
+	call_object(handler, t, handler_name);
+
+	Py_DECREF(t);
+}
+
+static void python_process_event(union perf_event *event,
+				 struct perf_sample *sample,
+				 struct addr_location *al,
+				 struct addr_location *addr_al)
+{
+	struct tables *tables = &tables_global;
+
+	scripting_context__update(scripting_context, event, sample, al, addr_al);
+
+	switch (sample->evsel->core.attr.type) {
+	case PERF_TYPE_TRACEPOINT:
+		python_process_tracepoint(sample, al, addr_al);
+		break;
+	/* Reserve for future process_hw/sw/raw APIs */
+	default:
+		if (tables->db_export_mode)
+			db_export__sample(&tables->dbe, event, sample, al, addr_al);
+		else
+			python_process_general_event(sample, al, addr_al);
+	}
+}
+
+static void python_process_throttle(union perf_event *event,
+				    struct perf_sample *sample,
+				    struct machine *machine)
+{
+	const char *handler_name;
+	PyObject *handler, *t;
+
+	if (event->header.type == PERF_RECORD_THROTTLE)
+		handler_name = "throttle";
+	else
+		handler_name = "unthrottle";
+	handler = get_handler(handler_name);
+	if (!handler)
+		return;
+
+	t = tuple_new(6);
+	if (!t)
+		return;
+
+	tuple_set_u64(t, 0, event->throttle.time);
+	tuple_set_u64(t, 1, event->throttle.id);
+	tuple_set_u64(t, 2, event->throttle.stream_id);
+	tuple_set_s32(t, 3, sample->cpu);
+	tuple_set_s32(t, 4, sample->pid);
+	tuple_set_s32(t, 5, sample->tid);
+
+	call_object(handler, t, handler_name);
+
+	Py_DECREF(t);
+}
+
+static void python_do_process_switch(union perf_event *event,
+				     struct perf_sample *sample,
+				     struct machine *machine)
+{
+	const char *handler_name = "context_switch";
+	bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
+	bool out_preempt = out && (event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT);
+	pid_t np_pid = -1, np_tid = -1;
+	PyObject *handler, *t;
+
+	handler = get_handler(handler_name);
+	if (!handler)
+		return;
+
+	if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
+		np_pid = event->context_switch.next_prev_pid;
+		np_tid = event->context_switch.next_prev_tid;
+	}
+
+	t = tuple_new(11);
+	if (!t)
+		return;
+
+	tuple_set_u64(t, 0, sample->time);
+	tuple_set_s32(t, 1, sample->cpu);
+	tuple_set_s32(t, 2, sample->pid);
+	tuple_set_s32(t, 3, sample->tid);
+	tuple_set_s32(t, 4, np_pid);
+	tuple_set_s32(t, 5, np_tid);
+	tuple_set_s32(t, 6, machine->pid);
+	tuple_set_bool(t, 7, out);
+	tuple_set_bool(t, 8, out_preempt);
+	tuple_set_s32(t, 9, sample->machine_pid);
+	tuple_set_s32(t, 10, sample->vcpu);
+
+	call_object(handler, t, handler_name);
+
+	Py_DECREF(t);
+}
+
+static void python_process_switch(union perf_event *event,
+				  struct perf_sample *sample,
+				  struct machine *machine)
+{
+	struct tables *tables = &tables_global;
+
+	if (tables->db_export_mode)
+		db_export__switch(&tables->dbe, event, sample, machine);
+	else
+		python_do_process_switch(event, sample, machine);
+}
+
+static void python_process_auxtrace_error(struct perf_session *session __maybe_unused,
+					  union perf_event *event)
+{
+	struct perf_record_auxtrace_error *e = &event->auxtrace_error;
+	u8 cpumode = e->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+	const char *handler_name = "auxtrace_error";
+	unsigned long long tm = e->time;
+	const char *msg = e->msg;
+	s32 machine_pid = 0, vcpu = 0;
+	char msg_buf[MAX_AUXTRACE_ERROR_MSG + 1];
+	int msg_max;
+	PyObject *handler, *t;
+
+	handler = get_handler(handler_name);
+	if (!handler)
+		return;
+
+	if (!e->fmt) {
+		tm = 0;
+		msg = (const char *)&e->time;
+	}
+
+	/* Bound msg to the bytes within the event, ensure NUL-termination */
+	msg_max = (int)((void *)event + event->header.size - (void *)msg);
+	if (msg_max <= 0) {
+		msg_buf[0] = '\0';
+	} else {
+		if (msg_max > (int)sizeof(msg_buf) - 1)
+			msg_max = sizeof(msg_buf) - 1;
+		memcpy(msg_buf, msg, msg_max);
+		msg_buf[msg_max] = '\0';
+	}
+
+	/* Only access fmt >= 2 fields if the event is large enough */
+	if (e->fmt >= 2 &&
+	    event->header.size >= offsetof(typeof(event->auxtrace_error), vcpu) +
+				  sizeof(event->auxtrace_error.vcpu)) {
+		machine_pid = e->machine_pid;
+		vcpu = e->vcpu;
+	}
+
+	t = tuple_new(11);
+
+	tuple_set_u32(t, 0, e->type);
+	tuple_set_u32(t, 1, e->code);
+	tuple_set_s32(t, 2, e->cpu);
+	tuple_set_s32(t, 3, e->pid);
+	tuple_set_s32(t, 4, e->tid);
+	tuple_set_u64(t, 5, e->ip);
+	tuple_set_u64(t, 6, tm);
+	tuple_set_string(t, 7, msg_buf);
+	tuple_set_u32(t, 8, cpumode);
+	tuple_set_s32(t, 9, machine_pid);
+	tuple_set_s32(t, 10, vcpu);
+
+	call_object(handler, t, handler_name);
+
+	Py_DECREF(t);
+}
+
+static void get_handler_name(char *str, size_t size,
+			     struct evsel *evsel)
+{
+	char *p = str;
+
+	scnprintf(str, size, "stat__%s", evsel__name(evsel));
+
+	while ((p = strchr(p, ':'))) {
+		*p = '_';
+		p++;
+	}
+}
+
+static void
+process_stat(struct evsel *counter, struct perf_cpu cpu, int thread, u64 tstamp,
+	     struct perf_counts_values *count)
+{
+	PyObject *handler, *t;
+	static char handler_name[256];
+	int n = 0;
+
+	t = PyTuple_New(MAX_FIELDS);
+	if (!t)
+		Py_FatalError("couldn't create Python tuple");
+
+	get_handler_name(handler_name, sizeof(handler_name),
+			 counter);
+
+	handler = get_handler(handler_name);
+	if (!handler) {
+		pr_debug("can't find python handler %s\n", handler_name);
+		return;
+	}
+
+	PyTuple_SetItem(t, n++, _PyLong_FromLong(cpu.cpu));
+	PyTuple_SetItem(t, n++, _PyLong_FromLong(thread));
+
+	tuple_set_u64(t, n++, tstamp);
+	tuple_set_u64(t, n++, count->val);
+	tuple_set_u64(t, n++, count->ena);
+	tuple_set_u64(t, n++, count->run);
+
+	if (_PyTuple_Resize(&t, n) == -1)
+		Py_FatalError("error resizing Python tuple");
+
+	call_object(handler, t, handler_name);
+
+	Py_DECREF(t);
+}
+
+static void python_process_stat(struct perf_stat_config *config,
+				struct evsel *counter, u64 tstamp)
+{
+	struct perf_thread_map *threads = counter->core.threads;
+	struct perf_cpu_map *cpus = counter->core.cpus;
+
+	for (int thread = 0; thread < perf_thread_map__nr(threads); thread++) {
+		unsigned int idx;
+		struct perf_cpu cpu;
+
+		perf_cpu_map__for_each_cpu(cpu, idx, cpus) {
+			process_stat(counter, cpu,
+				     perf_thread_map__pid(threads, thread), tstamp,
+				     perf_counts(counter->counts, idx, thread));
+		}
+	}
+}
+
+static void python_process_stat_interval(u64 tstamp)
+{
+	PyObject *handler, *t;
+	static const char handler_name[] = "stat__interval";
+	int n = 0;
+
+	t = PyTuple_New(MAX_FIELDS);
+	if (!t)
+		Py_FatalError("couldn't create Python tuple");
+
+	handler = get_handler(handler_name);
+	if (!handler) {
+		pr_debug("can't find python handler %s\n", handler_name);
+		return;
+	}
+
+	tuple_set_u64(t, n++, tstamp);
+
+	if (_PyTuple_Resize(&t, n) == -1)
+		Py_FatalError("error resizing Python tuple");
+
+	call_object(handler, t, handler_name);
+
+	Py_DECREF(t);
+}
+
+static int perf_script_context_init(void)
+{
+	PyObject *perf_script_context;
+	PyObject *perf_trace_context;
+	PyObject *dict;
+	int ret;
+
+	perf_trace_context = PyImport_AddModule("perf_trace_context");
+	if (!perf_trace_context)
+		return -1;
+	dict = PyModule_GetDict(perf_trace_context);
+	if (!dict)
+		return -1;
+
+	perf_script_context = _PyCapsule_New(scripting_context, NULL, NULL);
+	if (!perf_script_context)
+		return -1;
+
+	ret = PyDict_SetItemString(dict, "perf_script_context", perf_script_context);
+	if (!ret)
+		ret = PyDict_SetItemString(main_dict, "perf_script_context", perf_script_context);
+	Py_DECREF(perf_script_context);
+	return ret;
+}
+
+static int run_start_sub(void)
+{
+	main_module = PyImport_AddModule("__main__");
+	if (main_module == NULL)
+		return -1;
+	Py_INCREF(main_module);
+
+	main_dict = PyModule_GetDict(main_module);
+	if (main_dict == NULL)
+		goto error;
+	Py_INCREF(main_dict);
+
+	if (perf_script_context_init())
+		goto error;
+
+	try_call_object("trace_begin", NULL);
+
+	return 0;
+
+error:
+	Py_XDECREF(main_dict);
+	Py_XDECREF(main_module);
+	return -1;
+}
+
+#define SET_TABLE_HANDLER_(name, handler_name, table_name) do {		\
+	tables->handler_name = get_handler(#table_name);		\
+	if (tables->handler_name)					\
+		tables->dbe.export_ ## name = python_export_ ## name;	\
+} while (0)
+
+#define SET_TABLE_HANDLER(name) \
+	SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
+
+static void set_table_handlers(struct tables *tables)
+{
+	const char *perf_db_export_mode = "perf_db_export_mode";
+	const char *perf_db_export_calls = "perf_db_export_calls";
+	const char *perf_db_export_callchains = "perf_db_export_callchains";
+	PyObject *db_export_mode, *db_export_calls, *db_export_callchains;
+	bool export_calls = false;
+	bool export_callchains = false;
+	int ret;
+
+	memset(tables, 0, sizeof(struct tables));
+	if (db_export__init(&tables->dbe))
+		Py_FatalError("failed to initialize export");
+
+	db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
+	if (!db_export_mode)
+		return;
+
+	ret = PyObject_IsTrue(db_export_mode);
+	if (ret == -1)
+		handler_call_die(perf_db_export_mode);
+	if (!ret)
+		return;
+
+	/* handle export calls */
+	tables->dbe.crp = NULL;
+	db_export_calls = PyDict_GetItemString(main_dict, perf_db_export_calls);
+	if (db_export_calls) {
+		ret = PyObject_IsTrue(db_export_calls);
+		if (ret == -1)
+			handler_call_die(perf_db_export_calls);
+		export_calls = !!ret;
+	}
+
+	if (export_calls) {
+		tables->dbe.crp =
+			call_return_processor__new(python_process_call_return,
+						   &tables->dbe);
+		if (!tables->dbe.crp)
+			Py_FatalError("failed to create calls processor");
+	}
+
+	/* handle export callchains */
+	tables->dbe.cpr = NULL;
+	db_export_callchains = PyDict_GetItemString(main_dict,
+						    perf_db_export_callchains);
+	if (db_export_callchains) {
+		ret = PyObject_IsTrue(db_export_callchains);
+		if (ret == -1)
+			handler_call_die(perf_db_export_callchains);
+		export_callchains = !!ret;
+	}
+
+	if (export_callchains) {
+		/*
+		 * Attempt to use the call path root from the call return
+		 * processor, if the call return processor is in use. Otherwise,
+		 * we allocate a new call path root. This prevents exporting
+		 * duplicate call path ids when both are in use simultaneously.
+		 */
+		if (tables->dbe.crp)
+			tables->dbe.cpr = tables->dbe.crp->cpr;
+		else
+			tables->dbe.cpr = call_path_root__new();
+
+		if (!tables->dbe.cpr)
+			Py_FatalError("failed to create call path root");
+	}
+
+	tables->db_export_mode = true;
+	/*
+	 * Reserve per symbol space for symbol->db_id via symbol__priv()
+	 */
+	symbol_conf.priv_size = sizeof(u64);
+
+	SET_TABLE_HANDLER(evsel);
+	SET_TABLE_HANDLER(machine);
+	SET_TABLE_HANDLER(thread);
+	SET_TABLE_HANDLER(comm);
+	SET_TABLE_HANDLER(comm_thread);
+	SET_TABLE_HANDLER(dso);
+	SET_TABLE_HANDLER(symbol);
+	SET_TABLE_HANDLER(branch_type);
+	SET_TABLE_HANDLER(sample);
+	SET_TABLE_HANDLER(call_path);
+	SET_TABLE_HANDLER(call_return);
+	SET_TABLE_HANDLER(context_switch);
+
+	/*
+	 * Synthesized events are samples but with architecture-specific data
+	 * stored in sample->raw_data. They are exported via
+	 * python_export_sample() and consequently do not need a separate export
+	 * callback.
+	 */
+	tables->synth_handler = get_handler("synth_data");
+}
+
+static void _free_command_line(wchar_t **command_line, int num)
+{
+	int i;
+	for (i = 0; i < num; i++)
+		PyMem_RawFree(command_line[i]);
+	free(command_line);
+}
+
+
+/*
+ * Start trace script
+ */
+static int python_start_script(const char *script, int argc, const char **argv,
+			       struct perf_session *session)
+{
+	struct tables *tables = &tables_global;
+	wchar_t **command_line;
+	char buf[PATH_MAX];
+	int i, err = 0;
+	FILE *fp;
+
+	scripting_context->session = session;
+	command_line = malloc((argc + 1) * sizeof(wchar_t *));
+	if (!command_line)
+		return -1;
+
+	command_line[0] = Py_DecodeLocale(script, NULL);
+	for (i = 1; i < argc + 1; i++)
+		command_line[i] = Py_DecodeLocale(argv[i - 1], NULL);
+	PyImport_AppendInittab("perf_trace_context", PyInit_perf_trace_context);
+	Py_Initialize();
+
+	PySys_SetArgv(argc + 1, command_line);
+
+	fp = fopen(script, "r");
+	if (!fp) {
+		sprintf(buf, "Can't open python script \"%s\"", script);
+		perror(buf);
+		err = -1;
+		goto error;
+	}
+
+	err = PyRun_SimpleFile(fp, script);
+	if (err) {
+		fprintf(stderr, "Error running python script %s\n", script);
+		goto error;
+	}
+
+	err = run_start_sub();
+	if (err) {
+		fprintf(stderr, "Error starting python script %s\n", script);
+		goto error;
+	}
+
+	set_table_handlers(tables);
+
+	if (tables->db_export_mode) {
+		err = db_export__branch_types(&tables->dbe);
+		if (err)
+			goto error;
+	}
+
+	_free_command_line(command_line, argc + 1);
+
+	return err;
+error:
+	Py_Finalize();
+	_free_command_line(command_line, argc + 1);
+
+	return err;
+}
+
+static int python_flush_script(void)
+{
+	return 0;
+}
+
+/*
+ * Stop trace script
+ */
+static int python_stop_script(void)
+{
+	struct tables *tables = &tables_global;
+
+	try_call_object("trace_end", NULL);
+
+	db_export__exit(&tables->dbe);
+
+	Py_XDECREF(main_dict);
+	Py_XDECREF(main_module);
+	Py_Finalize();
+
+	return 0;
+}
+
+#ifdef HAVE_LIBTRACEEVENT
+static int python_generate_script(struct tep_handle *pevent, const char *outfile)
+{
+	int i, not_first, count, nr_events;
+	struct tep_event **all_events;
+	struct tep_event *event = NULL;
+	struct tep_format_field *f;
+	char fname[PATH_MAX];
+	FILE *ofp;
+
+	sprintf(fname, "%s.py", outfile);
+	ofp = fopen(fname, "w");
+	if (ofp == NULL) {
+		fprintf(stderr, "couldn't open %s\n", fname);
+		return -1;
+	}
+	fprintf(ofp, "# perf script event handlers, "
+		"generated by perf script -g python\n");
+
+	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
+		" License version 2\n\n");
+
+	fprintf(ofp, "# The common_* event handler fields are the most useful "
+		"fields common to\n");
+
+	fprintf(ofp, "# all events.  They don't necessarily correspond to "
+		"the 'common_*' fields\n");
+
+	fprintf(ofp, "# in the format files.  Those fields not available as "
+		"handler params can\n");
+
+	fprintf(ofp, "# be retrieved using Python functions of the form "
+		"common_*(context).\n");
+
+	fprintf(ofp, "# See the perf-script-python Documentation for the list "
+		"of available functions.\n\n");
+
+	fprintf(ofp, "from __future__ import print_function\n\n");
+	fprintf(ofp, "import os\n");
+	fprintf(ofp, "import sys\n\n");
+
+	fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
+	fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
+	fprintf(ofp, "\nfrom perf_trace_context import *\n");
+	fprintf(ofp, "from Core import *\n\n\n");
+
+	fprintf(ofp, "def trace_begin():\n");
+	fprintf(ofp, "\tprint(\"in trace_begin\")\n\n");
+
+	fprintf(ofp, "def trace_end():\n");
+	fprintf(ofp, "\tprint(\"in trace_end\")\n\n");
+
+	nr_events = tep_get_events_count(pevent);
+	all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);
+
+	for (i = 0; all_events && i < nr_events; i++) {
+		event = all_events[i];
+		fprintf(ofp, "def %s__%s(", event->system, event->name);
+		fprintf(ofp, "event_name, ");
+		fprintf(ofp, "context, ");
+		fprintf(ofp, "common_cpu,\n");
+		fprintf(ofp, "\tcommon_secs, ");
+		fprintf(ofp, "common_nsecs, ");
+		fprintf(ofp, "common_pid, ");
+		fprintf(ofp, "common_comm,\n\t");
+		fprintf(ofp, "common_callchain, ");
+
+		not_first = 0;
+		count = 0;
+
+		for (f = event->format.fields; f; f = f->next) {
+			if (not_first++)
+				fprintf(ofp, ", ");
+			if (++count % 5 == 0)
+				fprintf(ofp, "\n\t");
+
+			fprintf(ofp, "%s", f->name);
+		}
+		if (not_first++)
+			fprintf(ofp, ", ");
+		if (++count % 5 == 0)
+			fprintf(ofp, "\n\t\t");
+		fprintf(ofp, "perf_sample_dict");
+
+		fprintf(ofp, "):\n");
+
+		fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
+			"common_secs, common_nsecs,\n\t\t\t"
+			"common_pid, common_comm)\n\n");
+
+		fprintf(ofp, "\t\tprint(\"");
+
+		not_first = 0;
+		count = 0;
+
+		for (f = event->format.fields; f; f = f->next) {
+			if (not_first++)
+				fprintf(ofp, ", ");
+			if (count && count % 3 == 0) {
+				fprintf(ofp, "\" \\\n\t\t\"");
+			}
+			count++;
+
+			fprintf(ofp, "%s=", f->name);
+			if (f->flags & TEP_FIELD_IS_STRING ||
+			    f->flags & TEP_FIELD_IS_FLAG ||
+			    f->flags & TEP_FIELD_IS_ARRAY ||
+			    f->flags & TEP_FIELD_IS_SYMBOLIC)
+				fprintf(ofp, "%%s");
+			else if (f->flags & TEP_FIELD_IS_SIGNED)
+				fprintf(ofp, "%%d");
+			else
+				fprintf(ofp, "%%u");
+		}
+
+		fprintf(ofp, "\" %% \\\n\t\t(");
+
+		not_first = 0;
+		count = 0;
+
+		for (f = event->format.fields; f; f = f->next) {
+			if (not_first++)
+				fprintf(ofp, ", ");
+
+			if (++count % 5 == 0)
+				fprintf(ofp, "\n\t\t");
+
+			if (f->flags & TEP_FIELD_IS_FLAG) {
+				if ((count - 1) % 5 != 0) {
+					fprintf(ofp, "\n\t\t");
+					count = 4;
+				}
+				fprintf(ofp, "flag_str(\"");
+				fprintf(ofp, "%s__%s\", ", event->system,
+					event->name);
+				fprintf(ofp, "\"%s\", %s)", f->name,
+					f->name);
+			} else if (f->flags & TEP_FIELD_IS_SYMBOLIC) {
+				if ((count - 1) % 5 != 0) {
+					fprintf(ofp, "\n\t\t");
+					count = 4;
+				}
+				fprintf(ofp, "symbol_str(\"");
+				fprintf(ofp, "%s__%s\", ", event->system,
+					event->name);
+				fprintf(ofp, "\"%s\", %s)", f->name,
+					f->name);
+			} else
+				fprintf(ofp, "%s", f->name);
+		}
+
+		fprintf(ofp, "))\n\n");
+
+		fprintf(ofp, "\t\tprint('Sample: {'+"
+			"get_dict_as_string(perf_sample_dict['sample'], ', ')+'}')\n\n");
+
+		fprintf(ofp, "\t\tfor node in common_callchain:");
+		fprintf(ofp, "\n\t\t\tif 'sym' in node:");
+		fprintf(ofp, "\n\t\t\t\tprint(\"\t[%%x] %%s%%s%%s%%s\" %% (");
+		fprintf(ofp, "\n\t\t\t\t\tnode['ip'], node['sym']['name'],");
+		fprintf(ofp, "\n\t\t\t\t\t\"+0x{:x}\".format(node['sym_off']) if 'sym_off' in node else \"\",");
+		fprintf(ofp, "\n\t\t\t\t\t\" ({})\".format(node['dso'])  if 'dso' in node else \"\",");
+		fprintf(ofp, "\n\t\t\t\t\t\" \" + node['sym_srcline'] if 'sym_srcline' in node else \"\"))");
+		fprintf(ofp, "\n\t\t\telse:");
+		fprintf(ofp, "\n\t\t\t\tprint(\"\t[%%x]\" %% (node['ip']))\n\n");
+		fprintf(ofp, "\t\tprint()\n\n");
+
+	}
+
+	fprintf(ofp, "def trace_unhandled(event_name, context, "
+		"event_fields_dict, perf_sample_dict):\n");
+
+	fprintf(ofp, "\t\tprint(get_dict_as_string(event_fields_dict))\n");
+	fprintf(ofp, "\t\tprint('Sample: {'+"
+		"get_dict_as_string(perf_sample_dict['sample'], ', ')+'}')\n\n");
+
+	fprintf(ofp, "def print_header("
+		"event_name, cpu, secs, nsecs, pid, comm):\n"
+		"\tprint(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
+		"(event_name, cpu, secs, nsecs, pid, comm), end=\"\")\n\n");
+
+	fprintf(ofp, "def get_dict_as_string(a_dict, delimiter=' '):\n"
+		"\treturn delimiter.join"
+		"(['%%s=%%s'%%(k,str(v))for k,v in sorted(a_dict.items())])\n");
+
+	fclose(ofp);
+
+	fprintf(stderr, "generated Python script: %s\n", fname);
+
+	return 0;
+}
+#else
+static int python_generate_script(struct tep_handle *pevent __maybe_unused,
+				  const char *outfile __maybe_unused)
+{
+	fprintf(stderr, "Generating Python perf-script is not supported."
+		"  Install libtraceevent and rebuild perf to enable it.\n"
+		"For example:\n  # apt install libtraceevent-dev (ubuntu)"
+		"\n  # yum install libtraceevent-devel (Fedora)"
+		"\n  etc.\n");
+	return -1;
+}
+#endif
+
+struct scripting_ops python_scripting_ops = {
+	.name			= "Python",
+	.dirname		= "python",
+	.start_script		= python_start_script,
+	.flush_script		= python_flush_script,
+	.stop_script		= python_stop_script,
+	.process_event		= python_process_event,
+	.process_switch		= python_process_switch,
+	.process_auxtrace_error	= python_process_auxtrace_error,
+	.process_stat		= python_process_stat,
+	.process_stat_interval	= python_process_stat_interval,
+	.process_throttle	= python_process_throttle,
+	.generate_script	= python_generate_script,
+};