[SR-8246] Runtime/linux-fatal-backtrace.swift test failing on Linux/AArch64

[futurejones]

Previous ID	SR-8246
Radar	None
Original Reporter	@futurejones
Type	Bug

Environment

Linux Ubuntu 16.04 LTS on AArch64
https://ci-external.swift.org/computer/ubuntu-16.04-aarch64/

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug, Linux, Test, aarch64
Assignee	None
Priority	Medium

md5: 2c6dcf190cb0c7b25d2ed2b78fa847a0

Issue Description:

Runtime/linux-fatal-backtrace.swift test is failing on swift-4.1-branch, swift-4.2-branch and the master.

Build machine - https://ci-external.swift.org/computer/ubuntu-16.04-aarch64/

Console output:

FAIL: Swift(linux-aarch64) :: Runtime/linux-fatal-backtrace.swift (9047 of 10668)
******************** TEST 'Swift(linux-aarch64) :: Runtime/linux-fatal-backtrace.swift' FAILED ********************
Script:
--
rm -rf /home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp
mkdir -p /home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp
/home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/build/buildbot_linux/swift-linux-aarch64/bin/swiftc -target aarch64-unknown-linux-gnu  -module-cache-path '/tmp/swift-testsuite-clang-module-cacheMFmh6q' -swift-version 3  /home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/swift/test/Runtime/linux-fatal-backtrace.swift -o /home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp/a.out
not --crash /home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp/a.out 2>&1 | PYTHONPATH=/home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/build/buildbot_linux/lldb-linux-aarch64/lib/python2.7/site-packages /home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/swift/utils/symbolicate-linux-fatal /home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp/a.out - | /home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/swift/utils/backtrace-check -u
--
Exit Code: 1

Command Output (stderr):
--
Traceback (most recent call last):
  File "/home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/swift/utils/backtrace-check", line 84, in <module>
    main()
  File "/home/worksonarm_test/jenkins_slave/workspace/swift-4.1-branch-aarch64-with-tests/swift/utils/backtrace-check", line 80, in main
    assert(found_stack_trace_entry)
AssertionError

--

********************

[belkadan]

Maybe the AArch64 backtrace format is different?

[swift-ci]

Comment by Jason Miller (JIRA)

I don't think this is just a problem with the test failing because it's looking for the wrong thing. We actually don't get backtraces at all on AArch64. My guess is that the backtrace code is failing because the AArch64 ABI is different but that's just a guess, I haven't looked into it at all.

[futurejones]

This test is still failing in Swift 5.0

******************** TEST 'Swift(linux-aarch64) :: Runtime/linux-fatal-backtrace.swift' FAILED ********************
Script:
--
: 'RUN: at line 1';   rm -rf "/home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp" && mkdir -p "/home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp"
: 'RUN: at line 2';   /home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/build/buildbot_linux/swift-linux-aarch64/bin/swiftc -target aarch64-unknown-linux-gnu  -module-cache-path '/home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/build/buildbot_linux/swift-linux-aarch64/swift-test-results/aarch64-unknown-linux-gnu/clang-module-cache' -swift-version 4   /home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/swift/test/Runtime/linux-fatal-backtrace.swift -o /home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp/a.out
: 'RUN: at line 3';   not --crash /home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp/a.out 2>&1 | PYTHONPATH=/home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/build/buildbot_linux/lldb-linux-aarch64/lib/python2.7/site-packages /home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/swift/utils/symbolicate-linux-fatal /home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/build/buildbot_linux/swift-linux-aarch64/test-linux-aarch64/Runtime/Output/linux-fatal-backtrace.swift.tmp/a.out - | /home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/swift/utils/backtrace-check -u
--
Exit Code: 1

Command Output (stderr):
--
Traceback (most recent call last):
  File "/home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/swift/utils/backtrace-check", line 84, in <module>
    main()
  File "/home/worksonarm_test/jenkins_slave/workspace/swift-5.0-aarch64/swift/utils/backtrace-check", line 80, in main
    assert(found_stack_trace_entry)
AssertionError

--

********************