James Peach created TS-5096:
-------------------------------
Summary: Lua metrics crashes if the prefix is missing
Key: TS-5096
URL: https://issues.apache.org/jira/browse/TS-5096
Project: Traffic Server
Issue Type: Bug
Components: Lua, Metrics
Reporter: James Peach
Using the example from the {{tslua.so}} documentation:
{noformat}
local test_stat;
function __init__(args)
test_stat = ts.stat_create("test_stat",
TS_LUA_RECORDDATATYPE_INT,
TS_LUA_STAT_PERSISTENT,
TS_LUA_STAT_SYNC_COUNT)
end
{noformat}
{{traffic_manager}} crashes in metrics update:
{noformat}
(gdb) where
#0 0x00007ffff5c964ad in __cxa_throw () from /lib64/libstdc++.so.6
#1 0x00007ffff5cbfdcf in std::__throw_length_error(char const*) () from
/lib64/libstdc++.so.6
#2 0x00007ffff5d2a7ec in std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >::_M_create(unsigned long&,
unsigned long) () from /lib64/libstdc++.so.6
#3 0x00000000004bbcf4 in std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >::_M_construct<char const*>
(this=0x7fffffffdc10, __beg=0x92ec30 "test_stat", __end=0x0) at
/usr/include/c++/6.2.1/bits/basic_string.tcc:219
#4 0x00007ffff5d2d515 in std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >::basic_string(char const*,
unsigned long, std::allocator<char> const&) () from /lib64/libstdc++.so.6
#5 0x00000000004bd228 in install_metrics_object (rec_type=RECT_PLUGIN,
edata=0x7fffffffdcf0, registered=1,
name=0x92ec30 "test_stat", data_type=1, datum=0x7ffff7f7dc48) at
metrics.cc:214
#6 0x00000000004a51a1 in RecDumpRecords (rec_type=46,
callback=0x4bd1a3 <install_metrics_object(RecT, void*, int, char const*,
int, RecData*)>, edata=0x7fffffffdcf0)
at RecCore.cc:1020
#7 0x00000000004bd2dd in lua_metrics_install (L=0x40000378) at metrics.cc:229
#8 0x0000000000449209 in update_metrics_namespace (L=0x40000378) at
metrics.cc:167
#9 0x0000000000449944 in metrics_binding_evaluate (binding=...) at
metrics.cc:377
#10 0x000000000044844d in main (argc=1, argv=0x7fffffffe578) at
traffic_manager.cc:772
(gdb)
#5 0x00000000004bd228 in install_metrics_object (rec_type=RECT_PLUGIN,
edata=0x7fffffffdcf0, registered=1,
name=0x92ec30 "test_stat", data_type=1, datum=0x7ffff7f7dc48) at
metrics.cc:214
214 prefixes->insert(std::string(name, len));
(gdb) p len
$1 = -9628720
{noformat}
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