| Issue |
61484
|
| Summary |
Add timeout to connecting to debuginfod servers
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
russelltg
|
We have a debuginfod server behind our VPN, so it is only available when connected to the VPN. Currently, it will hang forever if not on the VPN. Easy repro:
```bash
DEBUGINFOD_URLS="http://192.168.10.103:8002" llvm-debuginfod-find-15 --executable d3397e038155fe9d
```
When I connect to the VPN, it works properly, however I would expect it to eventually time out. It's clear that this is what's going on from the output of strace:
```
$ DEBUGINFOD_URLS="http://192.168.10.103:8002" strace llvm-debuginfod-find-15 --executable d3397e038155fe9d
...
openat(AT_FDCWD, "/home/russell/.cache/llvm-debuginfod/client/llvmcache-7696581620544652856", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP) = 3
close(3) = 0
socketpair(AF_UNIX, SOCK_STREAM, 0, [3, 4]) = 0
fcntl(3, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
fcntl(4, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
rt_sigaction(SIGPIPE, NULL, {sa_handler=0x7fa3ddb44770, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND, sa_restorer=0x7fa3dc672520}, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=3, events=POLLIN}], 1, 0) = 0 (Timeout)
rt_sigaction(SIGPIPE, NULL, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND, sa_restorer=0x7fa3dc672520}, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 5
setsockopt(5, SOL_TCP, TCP_NODELAY, [1], 4) = 0
fcntl(5, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(5, F_SETFL, O_RDWR|O_NONBLOCK) = 0
connect(5, {sa_family=AF_INET, sin_port=htons(8002), sin_addr=inet_addr("192.168.10.103")}, 16) = -1 EINPROGRESS (Operation now in progress)
poll([{fd=5, events=POLLPRI|POLLOUT|POLLWRNORM}], 1, 0) = 0 (Timeout)
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLOUT}, {fd=3, events=POLLIN}], 2, 199) = 0 (Timeout)
rt_sigaction(SIGPIPE, NULL, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND, sa_restorer=0x7fa3dc672520}, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLPRI|POLLOUT|POLLWRNORM}], 1, 0) = 0 (Timeout)
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLOUT}, {fd=3, events=POLLIN}], 2, 1) = 0 (Timeout)
rt_sigaction(SIGPIPE, NULL, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND, sa_restorer=0x7fa3dc672520}, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLPRI|POLLOUT|POLLWRNORM}], 1, 0) = 0 (Timeout)
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLOUT}, {fd=3, events=POLLIN}], 2, 1000) = 0 (Timeout)
rt_sigaction(SIGPIPE, NULL, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND, sa_restorer=0x7fa3dc672520}, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLPRI|POLLOUT|POLLWRNORM}], 1, 0) = 0 (Timeout)
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLOUT}, {fd=3, events=POLLIN}], 2, 1000) = 0 (Timeout)
rt_sigaction(SIGPIPE, NULL, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND, sa_restorer=0x7fa3dc672520}, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLPRI|POLLOUT|POLLWRNORM}], 1, 0) = 0 (Timeout)
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLOUT}, {fd=3, events=POLLIN}], 2, 1000) = 0 (Timeout)
rt_sigaction(SIGPIPE, NULL, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND, sa_restorer=0x7fa3dc672520}, 8) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
poll([{fd=5, events=POLLPRI|POLLOUT|POLLWRNORM}], 1, 0) = 0 (Timeout)
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_NODEFER|SA_RESETHAND|0xffffffff00000000, sa_restorer=0x7fa3dc672520}, NULL, 8) = 0
...
```
IMO the most sane behavior would be a shortish (maybe 15 second?) default timeout and a commandline parameter to tune it.
I'm happy to implement this if there is interest!
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