sudheerv opened a new pull request #6937:
URL: https://github.com/apache/trafficserver/pull/6937
A fix that we are running in prod to prevent the below crashes
```
(gdb) bt
#0 __atomic_add (__val=1, __mem=0x64006469756767) at
/usr/include/c++/4.8.2/ext/atomicity.h:53
#1 __atomic_add_dispatch (__val=1, __mem=0x64006469756767) at
/usr/include/c++/4.8.2/ext/atomicity.h:96
#2 _M_add_ref_copy (this=0x6400646975675f) at
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:131
#3 __shared_count (__r=..., this=0x2adb99107a58) at
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:553
#4 __shared_ptr (this=this@entry=0x2adb99107a50) at
/usr/include/c++/4.8.2/bits/shared_ptr_base.h:779
#5 shared_ptr (this=this@entry=0x2adb99107a50) at
/usr/include/c++/4.8.2/bits/shared_ptr.h:103
#6 atscppapi::TransactionPlugin::getMutex (this=this@entry=0x2adc02a8c240)
at TransactionPlugin.cc:75
#7 0x00002adbb0a24d79 in
atscppapi::utils::internal::getTransactionPluginMutex (transaction_plugin=...)
at utils_internal.cc:192
#8 0x00002adbb0a24d96 in (anonymous namespace)::cleanupTransactionPlugin
(plugin=0x2adc02a8c240) at utils_internal.cc:56
#9 0x00002adbb0a25021 in (anonymous namespace)::handleTransactionEvents
(cont=<optimized out>, event=<optimized out>, edata=0x2adc33b3d4b0) at
utils_internal.cc:101
#10 0x00000000004c4a03 in INKContInternal::handle_event
(this=0x2adbb0588f40, event=60012, edata=0x2adc33b3d4b0) at InkAPI.cc:1012
#11 0x00000000005b5c8f in HttpSM::state_api_callout (this=0x2adc33b3d4b0,
event=<optimized out>, data=<optimized out>) at HttpSM.cc:1640
#12 0x00000000005bc02a in HttpSM::kill_this (this=this@entry=0x2adc33b3d4b0)
at HttpSM.cc:7041
#13 0x00000000005bcef0 in HttpSM::main_handler (this=0x2adc33b3d4b0,
event=2301, data=0x2adc33b3e840) at HttpSM.cc:2960
#14 0x00000000005ff1dd in handleEvent (data=0x2adc33b3e840, event=2301,
this=<optimized out>) at ../../iocore/eventsystem/I_Continuation.h:153
#15 HttpTunnel::main_handler (this=0x2adc33b3e840, event=<optimized out>,
data=<optimized out>) at HttpTunnel.cc:1642
#16 0x000000000076e10e in handleEvent (data=0x2adc4e83a5d8, event=103,
this=<optimized out>) at ../../iocore/eventsystem/I_Continuation.h:153
#17 write_signal_and_update (vc=0x2adc4e83a440, event=103) at
UnixNetVConnection.cc:179
#18 write_signal_done (vc=0x2adc4e83a440, nh=0x2adb9550af20, event=103) at
UnixNetVConnection.cc:224
#19 write_to_net_io (nh=nh@entry=0x2adb9550af20, vc=0x2adc4e83a440,
thread=<optimized out>) at UnixNetVConnection.cc:564
#20 0x000000000076e468 in write_to_net (nh=nh@entry=0x2adb9550af20,
vc=vc@entry=0x2adc4e83a440, thread=<optimized out>) at UnixNetVConnection.cc:421
#21 0x000000000075df74 in NetHandler::mainNetEvent (this=0x2adb9550af20,
event=<optimized out>, e=<optimized out>) at UnixNet.cc:535
#22 0x000000000078fa7f in handleEvent (data=0x2adb94bfe4c0, event=5,
this=<optimized out>) at I_Continuation.h:153
#23 process_event (calling_code=5, e=0x2adb94bfe4c0, this=0x2adb95507000) at
UnixEThread.cc:152
#24 EThread::execute (this=0x2adb95507000) at UnixEThread.cc:279
#25 0x000000000078e68a in spawn_thread_internal (a=0x2adb939a9130) at
Thread.cc:86
#26 0x00002adb91387dc5 in start_thread () from /lib64/libpthread.so.0
#27 0x00002adb9242176d in clone () from /lib64/libc.so.6
(gdb) f 7
#7 0x00002adbb0a24d79 in
atscppapi::utils::internal::getTransactionPluginMutex (transaction_plugin=...)
at utils_internal.cc:192
192 utils_internal.cc: No such file or directory.
(gdb) p *transaction_plugin.state_.cont_
$1 = <incomplete type>
(gdb) p *(INKContInternal*)transaction_plugin.state_.cont_
Cannot access memory at address 0x0
(gdb) p *(INKContInternal*)transaction_plugin.state_
$2 = {<DummyVConnection> = {<VConnection> = {<Continuation> =
{<force_VFPT_to_top> = {_vptr.force_VFPT_to_top = 0x0}, handler = NULL, mutex =
{m_ptr = 0x31313a}, link = {<SLink<Continuation>> = {next = 0x0}, prev =
0x20000000}, control_flags = {raw_flags = 301989888}}, lerrno = 496274542}, <No
data fields>},
mdata = 0x5ab7f2e0263b5896, m_event_func = 0x7126c1efbc02ad50,
m_event_count = -820720873, m_closed = 1447507213, m_deletable = -1059571869,
m_deleted = -597350145, m_free_magic = 2566914090}
(gdb) p *(INKContInternal*)transaction_plugin
Cannot access memory at address 0x7673652d646f7270
(gdb) p *transaction_plugin.state_
$3 = {<atscppapi::noncopyable> = {<No data fields>}, cont_ = 0x0,
ats_txn_handle_ = 0x0, mutex_ = <error reading variable: Cannot access memory
at address 0x313142>}
(gdb) p *transaction_plugin
No symbol "operator*" in current context.
(gdb) p transaction_plugin
$4 = (atscppapi::TransactionPlugin &) @0x2adc02a8c240: {<atscppapi::Plugin>
= {<atscppapi::noncopyable> = {<No data fields>}, _vptr.Plugin =
0x7673652d646f7270}, state_ = 0x2adbe3790035}
(gdb) p transaction_plugin.state_
$5 = (atscppapi::TransactionPluginState *) 0x2adbe3790035
(gdb) p *transaction_plugin.state_
$6 = {<atscppapi::noncopyable> = {<No data fields>}, cont_ = 0x0,
ats_txn_handle_ = 0x0, mutex_ = <error reading variable: Cannot access memory
at address 0x313142>}
(gdb) f
#7 0x00002adbb0a24d79 in
atscppapi::utils::internal::getTransactionPluginMutex (transaction_plugin=...)
at utils_internal.cc:192
192 in utils_internal.cc
(gdb) up
#8 0x00002adbb0a24d96 in (anonymous namespace)::cleanupTransactionPlugin
(plugin=0x2adc02a8c240) at utils_internal.cc:56
56 in utils_internal.cc
(gdb) p *(TransactionPlugin*)0x2adc02a8c240
$7 = {<atscppapi::Plugin> = {<atscppapi::noncopyable> = {<No data fields>},
_vptr.Plugin = 0x7673652d646f7270}, state_ = 0x2adbe3790035}
(gdb) p *(TransactionPlugin*)0x2adc02a8c240.state_
Invalid number "0x2adc02a8c240.state".
(gdb) p *((TransactionPlugin*)0x2adc02a8c240).state_
$8 = {<atscppapi::noncopyable> = {<No data fields>}, cont_ = 0x0,
ats_txn_handle_ = 0x0, mutex_ = <error reading variable: Cannot access memory
at address 0x313142>}
(gdb) up
#9 0x00002adbb0a25021 in (anonymous namespace)::handleTransactionEvents
(cont=<optimized out>, event=<optimized out>, edata=0x2adc33b3d4b0) at
utils_internal.cc:101
101 in utils_internal.cc
(gdb) p *transaction
No symbol "operator*" in current context.
(gdb) p transaction.state_
$9 = (atscppapi::TransactionState *) 0x2adb9f459cc0
(gdb) p *transaction.state_
$10 = {<atscppapi::noncopyable> = {<No data fields>}, txn_ = 0x2adc33b3d4b0,
plugins_ = std::list = {[0] = 0x2adc02a8c240, [1] = 0x2adbe092f630},
client_request_hdr_buf_ = 0x2adc33b3dc38, client_request_hdr_loc_ =
0x2adbf9432088, client_request_ = {<atscppapi::Request> =
{<atscppapi::noncopyable> = {<No data fields>},
state_ = 0x2adb9f7f8080}, state_ = 0x2adbf7d62c60},
server_request_hdr_buf_ = 0x2adc33b3dcb8, server_request_hdr_loc_ =
0x2adbd2a5b888, server_request_ = {<atscppapi::noncopyable> = {<No data
fields>}, state_ = 0x2adba2320680}, server_response_hdr_buf_ = 0x2adc33b3dcf8,
server_response_hdr_loc_ = 0x2adbce275088,
server_response_ = {<atscppapi::noncopyable> = {<No data fields>}, state_
= 0x2adb9f42fb80}, client_response_hdr_buf_ = 0x2adc33b3dc78,
client_response_hdr_loc_ = 0x2adbcd8e2088, client_response_ =
{<atscppapi::noncopyable> = {<No data fields>}, state_ = 0x2adbf7d789a0},
cached_response_hdr_buf_ = 0x0,
cached_response_hdr_loc_ = 0x0, cached_response_ =
{<atscppapi::noncopyable> = {<No data fields>}, state_ = 0x2adbf7d78f20},
cached_request_hdr_buf_ = 0x0, cached_request_hdr_loc_ = 0x0, cached_request_ =
{<atscppapi::noncopyable> = {<No data fields>}, state_ = 0x2adb9f7bfdc0},
context_values_ = std::map with 0 elements}
(gdb) p *(TransactionPlugin*)0x2adc02a8c240
$11 = {<atscppapi::Plugin> = {<atscppapi::noncopyable> = {<No data fields>},
_vptr.Plugin = 0x7673652d646f7270}, state_ = 0x2adbe3790035}
(gdb) p *((TransactionPlugin*)0x2adc02a8c240).state_
$12 = {<atscppapi::noncopyable> = {<No data fields>}, cont_ = 0x0,
ats_txn_handle_ = 0x0, mutex_ = <error reading variable: Cannot access memory
at address 0x313142>}
(gdb) p *((TransactionPlugin*)0x2adc02a8c240)
$13 = {<atscppapi::Plugin> = {<atscppapi::noncopyable> = {<No data fields>},
_vptr.Plugin = 0x7673652d646f7270}, state_ = 0x2adbe3790035}
```
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
