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Subject[PATCH 2/3] perf script: Add callchain to generic and tracepoint events

perf script: Add callchain to generic and tracepoint events.
This provides valuable information for tracing performance problems.
Since this change alters the interface for the python scripts,
also adjust the script generation and the provided scripts.

Signed-off-by: Joseph Schuchart <joseph.schuchart@tu-dresden.de>
Acked-by: Thomas Ilsche <thomas.ilsche@tu-dresden.de>
---
.../python/Perf-Trace-Util/lib/Perf/Trace/Core.py | 3 +-
tools/perf/scripts/python/check-perf-trace.py | 4 +-
.../perf/scripts/python/failed-syscalls-by-pid.py | 2 +-
tools/perf/scripts/python/futex-contention.py | 4 +-
tools/perf/scripts/python/net_dropmonitor.py | 2 +-
tools/perf/scripts/python/netdev-times.py | 26 ++---
tools/perf/scripts/python/sched-migration.py | 41 ++++----
tools/perf/scripts/python/sctop.py | 2 +-
tools/perf/scripts/python/syscall-counts-by-pid.py | 2 +-
tools/perf/scripts/python/syscall-counts.py | 2 +-
.../util/scripting-engines/trace-event-python.c | 106 ++++++++++++++++++++-
11 files changed, 146 insertions(+), 48 deletions(-)

diff --git a/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py
index de7211e..38dfb72 100644
--- a/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py
+++ b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py
@@ -107,12 +107,13 @@ def taskState(state):

class EventHeaders:
def __init__(self, common_cpu, common_secs, common_nsecs,
- common_pid, common_comm):
+ common_pid, common_comm, common_callchain):
self.cpu = common_cpu
self.secs = common_secs
self.nsecs = common_nsecs
self.pid = common_pid
self.comm = common_comm
+ self.callchain = common_callchain

def ts(self):
return (self.secs * (10 ** 9)) + self.nsecs
diff --git a/tools/perf/scripts/python/check-perf-trace.py b/tools/perf/scripts/python/check-perf-trace.py
index 4647a76..334599c 100644
--- a/tools/perf/scripts/python/check-perf-trace.py
+++ b/tools/perf/scripts/python/check-perf-trace.py
@@ -27,7 +27,7 @@ def trace_end():

def irq__softirq_entry(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- vec):
+ common_callchain, vec):
print_header(event_name, common_cpu, common_secs, common_nsecs,
common_pid, common_comm)

@@ -38,7 +38,7 @@ def irq__softirq_entry(event_name, context, common_cpu,

def kmem__kmalloc(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- call_site, ptr, bytes_req, bytes_alloc,
+ common_callchain, call_site, ptr, bytes_req, bytes_alloc,
gfp_flags):
print_header(event_name, common_cpu, common_secs, common_nsecs,
common_pid, common_comm)
diff --git a/tools/perf/scripts/python/failed-syscalls-by-pid.py b/tools/perf/scripts/python/failed-syscalls-by-pid.py
index 266a836..cafeff3 100644
--- a/tools/perf/scripts/python/failed-syscalls-by-pid.py
+++ b/tools/perf/scripts/python/failed-syscalls-by-pid.py
@@ -39,7 +39,7 @@ def trace_end():

def raw_syscalls__sys_exit(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- id, ret):
+ common_callchain, id, ret):
if (for_comm and common_comm != for_comm) or \
(for_pid and common_pid != for_pid ):
return
diff --git a/tools/perf/scripts/python/futex-contention.py b/tools/perf/scripts/python/futex-contention.py
index 11e70a3..0f5cf43 100644
--- a/tools/perf/scripts/python/futex-contention.py
+++ b/tools/perf/scripts/python/futex-contention.py
@@ -21,7 +21,7 @@ thread_blocktime = {}
lock_waits = {} # long-lived stats on (tid,lock) blockage elapsed time
process_names = {} # long-lived pid-to-execname mapping

-def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm,
+def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
nr, uaddr, op, val, utime, uaddr2, val3):
cmd = op & FUTEX_CMD_MASK
if cmd != FUTEX_WAIT:
@@ -31,7 +31,7 @@ def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm,
thread_thislock[tid] = uaddr
thread_blocktime[tid] = nsecs(s, ns)

-def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm,
+def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
nr, ret):
if thread_blocktime.has_key(tid):
elapsed = nsecs(s, ns) - thread_blocktime[tid]
diff --git a/tools/perf/scripts/python/net_dropmonitor.py b/tools/perf/scripts/python/net_dropmonitor.py
index b574059..0b6ce8c 100755
--- a/tools/perf/scripts/python/net_dropmonitor.py
+++ b/tools/perf/scripts/python/net_dropmonitor.py
@@ -66,7 +66,7 @@ def trace_end():
print_drop_table()

# called from perf, when it finds a correspoinding event
-def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm,
+def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm, callchain,
skbaddr, location, protocol):
slocation = str(location)
try:
diff --git a/tools/perf/scripts/python/netdev-times.py b/tools/perf/scripts/python/netdev-times.py
index 9aa0a32..4d21ef2 100644
--- a/tools/perf/scripts/python/netdev-times.py
+++ b/tools/perf/scripts/python/netdev-times.py
@@ -224,75 +224,75 @@ def trace_end():
(len(rx_skb_list), of_count_rx_skb_list)

# called from perf, when it finds a correspoinding event
-def irq__softirq_entry(name, context, cpu, sec, nsec, pid, comm, vec):
+def irq__softirq_entry(name, context, cpu, sec, nsec, pid, comm, callchain, vec):
if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
return
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
all_event_list.append(event_info)

-def irq__softirq_exit(name, context, cpu, sec, nsec, pid, comm, vec):
+def irq__softirq_exit(name, context, cpu, sec, nsec, pid, comm, callchain, vec):
if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
return
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
all_event_list.append(event_info)

-def irq__softirq_raise(name, context, cpu, sec, nsec, pid, comm, vec):
+def irq__softirq_raise(name, context, cpu, sec, nsec, pid, comm, callchain, vec):
if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
return
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
all_event_list.append(event_info)

def irq__irq_handler_entry(name, context, cpu, sec, nsec, pid, comm,
- irq, irq_name):
+ callchain, irq, irq_name):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
irq, irq_name)
all_event_list.append(event_info)

-def irq__irq_handler_exit(name, context, cpu, sec, nsec, pid, comm, irq, ret):
+def irq__irq_handler_exit(name, context, cpu, sec, nsec, pid, comm, callchain, irq, ret):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, irq, ret)
all_event_list.append(event_info)

-def napi__napi_poll(name, context, cpu, sec, nsec, pid, comm, napi, dev_name):
+def napi__napi_poll(name, context, cpu, sec, nsec, pid, comm, callchain, napi, dev_name):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
napi, dev_name)
all_event_list.append(event_info)

-def net__netif_receive_skb(name, context, cpu, sec, nsec, pid, comm, skbaddr,
+def net__netif_receive_skb(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr,
skblen, dev_name):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
skbaddr, skblen, dev_name)
all_event_list.append(event_info)

-def net__netif_rx(name, context, cpu, sec, nsec, pid, comm, skbaddr,
+def net__netif_rx(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr,
skblen, dev_name):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
skbaddr, skblen, dev_name)
all_event_list.append(event_info)

-def net__net_dev_queue(name, context, cpu, sec, nsec, pid, comm,
+def net__net_dev_queue(name, context, cpu, sec, nsec, pid, comm, callchain,
skbaddr, skblen, dev_name):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
skbaddr, skblen, dev_name)
all_event_list.append(event_info)

-def net__net_dev_xmit(name, context, cpu, sec, nsec, pid, comm,
+def net__net_dev_xmit(name, context, cpu, sec, nsec, pid, comm, callchain,
skbaddr, skblen, rc, dev_name):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
skbaddr, skblen, rc ,dev_name)
all_event_list.append(event_info)

-def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm,
+def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm, callchain,
skbaddr, protocol, location):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
skbaddr, protocol, location)
all_event_list.append(event_info)

-def skb__consume_skb(name, context, cpu, sec, nsec, pid, comm, skbaddr):
+def skb__consume_skb(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
skbaddr)
all_event_list.append(event_info)

-def skb__skb_copy_datagram_iovec(name, context, cpu, sec, nsec, pid, comm,
+def skb__skb_copy_datagram_iovec(name, context, cpu, sec, nsec, pid, comm, callchain,
skbaddr, skblen):
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
skbaddr, skblen)
diff --git a/tools/perf/scripts/python/sched-migration.py b/tools/perf/scripts/python/sched-migration.py
index 74d55ec..de66cb3 100644
--- a/tools/perf/scripts/python/sched-migration.py
+++ b/tools/perf/scripts/python/sched-migration.py
@@ -369,93 +369,92 @@ def trace_end():

def sched__sched_stat_runtime(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, runtime, vruntime):
+ common_callchain, comm, pid, runtime, vruntime):
pass

def sched__sched_stat_iowait(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, delay):
+ common_callchain, comm, pid, delay):
pass

def sched__sched_stat_sleep(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, delay):
+ common_callchain, comm, pid, delay):
pass

def sched__sched_stat_wait(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, delay):
+ common_callchain, comm, pid, delay):
pass

def sched__sched_process_fork(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- parent_comm, parent_pid, child_comm, child_pid):
+ common_callchain, parent_comm, parent_pid, child_comm, child_pid):
pass

def sched__sched_process_wait(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, prio):
+ common_callchain, comm, pid, prio):
pass

def sched__sched_process_exit(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, prio):
+ common_callchain, comm, pid, prio):
pass

def sched__sched_process_free(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, prio):
+ common_callchain, comm, pid, prio):
pass

def sched__sched_migrate_task(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, prio, orig_cpu,
+ common_callchain, comm, pid, prio, orig_cpu,
dest_cpu):
headers = EventHeaders(common_cpu, common_secs, common_nsecs,
- common_pid, common_comm)
+ common_pid, common_comm, common_callchain)
parser.migrate(headers, pid, prio, orig_cpu, dest_cpu)

def sched__sched_switch(event_name, context, common_cpu,
- common_secs, common_nsecs, common_pid, common_comm,
+ common_secs, common_nsecs, common_pid, common_comm, common_callchain,
prev_comm, prev_pid, prev_prio, prev_state,
next_comm, next_pid, next_prio):

headers = EventHeaders(common_cpu, common_secs, common_nsecs,
- common_pid, common_comm)
+ common_pid, common_comm, common_callchain)
parser.sched_switch(headers, prev_comm, prev_pid, prev_prio, prev_state,
next_comm, next_pid, next_prio)

def sched__sched_wakeup_new(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, prio, success,
+ common_callchain, comm, pid, prio, success,
target_cpu):
headers = EventHeaders(common_cpu, common_secs, common_nsecs,
- common_pid, common_comm)
+ common_pid, common_comm, common_callchain)
parser.wake_up(headers, comm, pid, success, target_cpu, 1)

def sched__sched_wakeup(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, prio, success,
+ common_callchain, comm, pid, prio, success,
target_cpu):
headers = EventHeaders(common_cpu, common_secs, common_nsecs,
- common_pid, common_comm)
+ common_pid, common_comm, common_callchain)
parser.wake_up(headers, comm, pid, success, target_cpu, 0)

def sched__sched_wait_task(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid, prio):
+ common_callchain, comm, pid, prio):
pass

def sched__sched_kthread_stop_ret(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- ret):
+ common_callchain, ret):
pass

def sched__sched_kthread_stop(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- comm, pid):
+ common_callchain, comm, pid):
pass

-def trace_unhandled(event_name, context, common_cpu, common_secs, common_nsecs,
- common_pid, common_comm):
+def trace_unhandled(event_name, context, event_fields_dict):
pass
diff --git a/tools/perf/scripts/python/sctop.py b/tools/perf/scripts/python/sctop.py
index c9f3058..61621b9 100644
--- a/tools/perf/scripts/python/sctop.py
+++ b/tools/perf/scripts/python/sctop.py
@@ -44,7 +44,7 @@ def trace_begin():

def raw_syscalls__sys_enter(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- id, args):
+ common_callchain, id, args):
if for_comm is not None:
if common_comm != for_comm:
return
diff --git a/tools/perf/scripts/python/syscall-counts-by-pid.py b/tools/perf/scripts/python/syscall-counts-by-pid.py
index cf2054c..daf314c 100644
--- a/tools/perf/scripts/python/syscall-counts-by-pid.py
+++ b/tools/perf/scripts/python/syscall-counts-by-pid.py
@@ -38,7 +38,7 @@ def trace_end():

def raw_syscalls__sys_enter(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- id, args):
+ common_callchain, id, args):

if (for_comm and common_comm != for_comm) or \
(for_pid and common_pid != for_pid ):
diff --git a/tools/perf/scripts/python/syscall-counts.py b/tools/perf/scripts/python/syscall-counts.py
index 92b2938..e66a773 100644
--- a/tools/perf/scripts/python/syscall-counts.py
+++ b/tools/perf/scripts/python/syscall-counts.py
@@ -35,7 +35,7 @@ def trace_end():

def raw_syscalls__sys_enter(event_name, context, common_cpu,
common_secs, common_nsecs, common_pid, common_comm,
- id, args):
+ common_callchain, id, args):
if for_comm is not None:
if common_comm != for_comm:
return
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index b6c1a69..cf65404 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -32,6 +32,7 @@
#include "../event.h"
#include "../thread.h"
#include "../trace-event.h"
+#include "../machine.h"

PyMODINIT_FUNC initperf_trace_context(void);

@@ -278,12 +279,90 @@ static PyObject *get_field_numeric_entry(struct event_format *event,
return obj;
}

+
+static PyObject *python_process_callchain(struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct addr_location *al)
+{
+ PyObject *pylist;
+
+ pylist = PyList_New(0);
+ if (!pylist)
+ Py_FatalError("couldn't create Python list");
+
+ if (!symbol_conf.use_callchain || !sample->callchain)
+ goto exit;
+
+ if (machine__resolve_callchain(al->machine, evsel, al->thread,
+ sample, NULL, NULL,
+ PERF_MAX_STACK_DEPTH) != 0) {
+ pr_err("Failed to resolve callchain. Skipping\n");
+ goto exit;
+ }
+ callchain_cursor_commit(&callchain_cursor);
+
+
+ while (1) {
+ PyObject *pyelem;
+ struct callchain_cursor_node *node;
+ node = callchain_cursor_current(&callchain_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->sym) {
+ PyObject *pysym = PyDict_New();
+ if (!pysym)
+ Py_FatalError("couldn't create Python dictionary");
+ pydict_set_item_string_decref(pysym, "start",
+ PyLong_FromUnsignedLongLong(node->sym->start));
+ pydict_set_item_string_decref(pysym, "end",
+ PyLong_FromUnsignedLongLong(node->sym->end));
+ pydict_set_item_string_decref(pysym, "binding",
+ PyInt_FromLong(node->sym->binding));
+ pydict_set_item_string_decref(pysym, "name",
+ PyString_FromStringAndSize(node->sym->name,
+ node->sym->namelen));
+ pydict_set_item_string_decref(pyelem, "sym", pysym);
+ }
+
+ if (node->map) {
+ struct map *map = node->map;
+ const char *dsoname = "[unknown]";
+ if (map && map->dso && (map->dso->name || map->dso->long_name)) {
+ if (symbol_conf.show_kernel_path && map->dso->long_name)
+ dsoname = map->dso->long_name;
+ else if (map->dso->name)
+ dsoname = map->dso->name;
+ }
+ pydict_set_item_string_decref(pyelem, "dso",
+ PyString_FromString(dsoname));
+ }
+
+ callchain_cursor_advance(&callchain_cursor);
+ PyList_Append(pylist, pyelem);
+ Py_DECREF(pyelem);
+ }
+
+exit:
+ return pylist;
+}
+
+
static void python_process_tracepoint(struct perf_sample *sample,
struct perf_evsel *evsel,
struct thread *thread,
struct addr_location *al)
{
- PyObject *handler, *retval, *context, *t, *obj, *dict = NULL;
+ PyObject *handler, *retval, *context, *t, *obj, *callchain;
+ PyObject *dict = NULL;
static char handler_name[256];
struct format_field *field;
unsigned long s, ns;
@@ -326,18 +405,23 @@ static void python_process_tracepoint(struct perf_sample *sample,
PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
PyTuple_SetItem(t, n++, context);

+ /* ip unwinding */
+ callchain = python_process_callchain(sample, evsel, al);
+
if (handler) {
PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
PyTuple_SetItem(t, n++, PyInt_FromLong(s));
PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
PyTuple_SetItem(t, n++, PyString_FromString(comm));
+ PyTuple_SetItem(t, n++, callchain);
} else {
pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
+ pydict_set_item_string_decref(dict, "common_callchain", callchain);
}
for (field = event->format.fields; field; field = field->next) {
if (field->flags & FIELD_IS_STRING) {
@@ -357,6 +441,7 @@ static void python_process_tracepoint(struct perf_sample *sample,
pydict_set_item_string_decref(dict, field->name, obj);

}
+
if (!handler)
PyTuple_SetItem(t, n++, dict);

@@ -388,7 +473,7 @@ static void python_process_general_event(struct perf_sample *sample,
struct thread *thread,
struct addr_location *al)
{
- PyObject *handler, *retval, *t, *dict;
+ PyObject *handler, *retval, *t, *dict, *callchain;
static char handler_name[64];
unsigned n = 0;

@@ -428,6 +513,10 @@ static void python_process_general_event(struct perf_sample *sample,
PyString_FromString(al->sym->name));
}

+ /* ip unwinding */
+ callchain = python_process_callchain(sample, evsel, al);
+ pydict_set_item_string_decref(dict, "callchain", callchain);
+
PyTuple_SetItem(t, n++, dict);
if (_PyTuple_Resize(&t, n) == -1)
Py_FatalError("error resizing Python tuple");
@@ -624,6 +713,7 @@ static int python_generate_script(struct pevent *pevent, const char *outfile)
fprintf(ofp, "common_nsecs, ");
fprintf(ofp, "common_pid, ");
fprintf(ofp, "common_comm,\n\t");
+ fprintf(ofp, "common_callchain, ");

not_first = 0;
count = 0;
@@ -667,7 +757,7 @@ static int python_generate_script(struct pevent *pevent, const char *outfile)
fprintf(ofp, "%%u");
}

- fprintf(ofp, "\\n\" %% \\\n\t\t(");
+ fprintf(ofp, "\" %% \\\n\t\t(");

not_first = 0;
count = 0;
@@ -703,7 +793,15 @@ static int python_generate_script(struct pevent *pevent, const char *outfile)
fprintf(ofp, "%s", f->name);
}

- fprintf(ofp, "),\n\n");
+ fprintf(ofp, ")\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\" %% (node['ip'], node['sym']['name'])");
+ 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\n");
+
}

fprintf(ofp, "def trace_unhandled(event_name, context, "
--
1.8.1.2


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