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
  ...

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,
+};