This testcase currently fails on sanitizer-x86_64-linux buildbot with following error:
FAIL: AddressSanitizer-i386-linux :: TestCases/Linux/recvfrom.cc (524 of 1166) ******************** TEST 'AddressSanitizer-i386-linux :: TestCases/Linux/recvfrom.cc' FAILED ******************** Script: -- /mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/clang_build/./bin/clang --driver-mode=g++ -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m32 /mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/asan/TestCases/Linux/recvfrom.cc -o /mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/clang_build/projects/compiler-rt/test/asan/I386LinuxConfig/TestCases/Linux/Output/recvfrom.cc.tmp && not /mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/clang_build/projects/compiler-rt/test/asan/I386LinuxConfig/TestCases/Linux/Output/recvfrom.cc.tmp 2>&1 | FileCheck /mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/asan/TestCases/Linux/recvfrom.cc -- Exit Code: 2 Command Output (stderr): -- FileCheck error: '-' is empty. --
I haven't managed reproduce this on my local box, but here my thoughts about the issue:
I believe this failure happens because of race on port 1234 between AddressSanitizer-i386-linux and AddressSanitizer-x86_64-linux instances of recvfrom.cc testcase. This patch tries to resolve the issue by trying to use another port if 1234 has already acquired.
s/kPortNum/portNum/
this is not a constant anymore