Hi,
I just tried to build my project with Xcode 12.5 in release mode and it never finishes compiling.
Works fine in debug mode. It also works in release mode with Xcode 12.4 and 12.2.
Also test with the latest snapshot swift-DEVELOPMENT-SNAPSHOT-2021-05-17-a but it also never finishes compiling. swift-frontend has 100% CPU usage and I did sample it:
Sampling process 29100 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling swift-frontend (pid 29100) every 1 millisecond
Process: swift-frontend [29100]
Path: /Applications/Xcode 12.5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend
Load Address: 0x1041dc000
Identifier: swift-frontend
Version: 1205.0.26.9
Code Type: ARM64
Platform: macOS
Parent Process: swift-frontend [29096]
Date/Time: 2021-05-18 23:27:35.759 +0200
Launch Time: 2021-05-18 23:26:43.983 +0200
OS Version: macOS 11.3 (20E232)
Report Version: 7
Analysis Tool: /usr/bin/sample
Physical footprint: 378.4M
Physical footprint (peak): 586.6M
----
Call graph:
2441 Thread_7907713 DispatchQueue_1: com.apple.main-thread (serial)
2441 start (in libdyld.dylib) + 4 [0x189970420]
2441 main (in swift-frontend) + 1136 [0x1041f5100]
2441 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (in swift-frontend) + 6588 [0x1042604d8]
2441 performCompileStepsPostSILGen(swift::CompilerInstance&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> >, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) (in swift-frontend) + 984 [0x10426d84c]
2441 swift::CompilerInstance::performSILProcessing(swift::SILModule*) (in swift-frontend) + 1024 [0x10437fbe0]
2441 swift::runSILOptimizationPasses(swift::SILModule&) (in swift-frontend) + 356 [0x1048f853c]
2441 llvm::Expected<swift::ExecuteSILPipelineRequest::OutputType> swift::Evaluator::getResultUncached<swift::ExecuteSILPipelineRequest>(swift::ExecuteSILPipelineRequest const&) (in swift-frontend) + 908 [0x1048f61f4]
2441 swift::SimpleRequest<swift::ExecuteSILPipelineRequest, std::__1::tuple<> (swift::SILPipelineExecutionDescriptor), (swift::RequestFlags)1>::evaluateRequest(swift::ExecuteSILPipelineRequest const&, swift::Evaluator&) (in swift-frontend) + 56 [0x10490779c]
2441 swift::SILPassManager::executePassPipelinePlan(swift::SILPassPipelinePlan const&) (in swift-frontend) + 132 [0x1048ef240]
2441 swift::SILPassManager::runFunctionPasses(unsigned int, unsigned int) (in swift-frontend) + 3444 [0x1048f2454]
2441 (anonymous namespace)::GenericSpecializer::run() (in swift-frontend) + 2476 [0x1049814f4]
2441 swift::trySpecializeApplyOfGeneric(swift::SILOptFunctionBuilder&, swift::ApplySite, llvm::SmallSetVector<swift::SILInstruction*, 8u>&, llvm::SmallVectorImpl<swift::SILFunction*>&, swift::OptRemark::Emitter&) (in swift-frontend) + 1064 [0x104a505e8]
2441 swift::ReabstractionInfo::ReabstractionInfo(swift::ModuleDecl*, bool, swift::ApplySite, swift::SILFunction*, swift::SubstitutionMap, swift::IsSerialized_t, bool, swift::OptRemark::Emitter*) (in swift-frontend) + 144 [0x104a4a2b0]
2441 swift::ReabstractionInfo::prepareAndCheck(swift::ApplySite, swift::SILFunction*, swift::SubstitutionMap, swift::OptRemark::Emitter*) (in swift-frontend) + 2956 [0x104a49734]
2441 swift::ReabstractionInfo::prepareAndCheck(swift::ApplySite, swift::SILFunction*, swift::SubstitutionMap, swift::OptRemark::Emitter*) (in swift-frontend) + 3224,3632,... [0x104a49840,0x104a499d8,...]
Total number in stack (recursive counted multiple, when >=5):
Sort by top of stack, same collapsed (when >= 5):
swift::ReabstractionInfo::prepareAndCheck(swift::ApplySite, swift::SILFunction*, swift::SubstitutionMap, swift::OptRemark::Emitter*) (in swift-frontend) 2441
Binary Images:
0x1041dc000 - 0x10905ffff +swift-frontend (1205.0.26.9) <DA5620CC-9B30-3EAF-8702-3421B24C2F44> /Applications/Xcode 12.5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend
0x10a474000 - 0x10a4f223b dyld (851.27) <DB836223-E7A0-3E2C-9632-58BB44DB56E9> /usr/lib/dyld
0x1896ae000 - 0x1896afe8b libsystem_blocks.dylib (79) <6DD71358-0029-3919-932B-C04DB1D407A5> /usr/lib/system/libsystem_blocks.dylib
0x1896b0000 - 0x1896e7bcb libxpc.dylib (2038.100.48) <E060D0AA-33F9-376E-8947-2FE8F31AB4CA> /usr/lib/system/libxpc.dylib
0x1896e8000 - 0x1896ffb93 libsystem_trace.dylib (1277.100.21) <0B5646C1-032C-3734-B559-C17E377B315A> /usr/lib/system/libsystem_trace.dylib
0x189700000 - 0x189773fcf libcorecrypto.dylib (1000.100.38) <F6D67608-CF61-3555-AD08-DD335048585F> /usr/lib/system/libcorecrypto.dylib
0x189774000 - 0x18979ffff libsystem_malloc.dylib (317.100.9) <0E5B3E8E-D999-3EBC-94E6-C66EA9BCDB46> /usr/lib/system/libsystem_malloc.dylib
0x1897a0000 - 0x1897e4807 libdispatch.dylib (1271.100.5) <28B946EB-7435-3DEF-999F-18A4F8A236D4> /usr/lib/system/libdispatch.dylib
0x1897e5000 - 0x18981eae3 libobjc.A.dylib (824) <AD69D65F-B680-3CDE-ACB0-F7DA4976A52F> /usr/lib/libobjc.A.dylib
0x18981f000 - 0x189821ffb libsystem_featureflags.dylib (28.60.1) <3337B778-D4D3-3EB6-B197-83861DDEE8DB> /usr/lib/system/libsystem_featureflags.dylib
0x189822000 - 0x1898a3ffb libsystem_c.dylib (1439.100.3) <9680A140-BC7D-3A57-AEAB-D32CFC5713B1> /usr/lib/system/libsystem_c.dylib
0x1898a4000 - 0x1898ffffb libc++.1.dylib (905.6) <E692D64D-0E8A-3270-B2C5-C71777E0DB33> /usr/lib/libc++.1.dylib
0x189900000 - 0x189917ffb libc++abi.dylib (905.6) <3409B6F1-870E-39D9-A61F-5FE711738D1B> /usr/lib/libc++abi.dylib
0x189918000 - 0x18994bfeb libsystem_kernel.dylib (7195.101.1) <1B63FA43-CA44-3EB6-BF55-54F2E306B3CE> /usr/lib/system/libsystem_kernel.dylib
0x18994c000 - 0x189957ff3 libsystem_pthread.dylib (454.100.8) <84CF19CF-0E7D-3604-900D-B16E6EDEAD0A> /usr/lib/system/libsystem_pthread.dylib
0x189958000 - 0x189999ff3 libdyld.dylib (851.27) <50204FB1-CB74-3B88-8C20-419704B28B56> /usr/lib/system/libdyld.dylib
0x18999a000 - 0x1899a0fef libsystem_platform.dylib (254.80.2) <991F42C6-2E43-3937-B899-A9A043208020> /usr/lib/system/libsystem_platform.dylib
0x1899a1000 - 0x1899ccfff libsystem_info.dylib (542.40.3) <74EE0B71-3303-3A7C-B4BF-75F1EF9F3F8F> /usr/lib/system/libsystem_info.dylib
0x1899cd000 - 0x189e7bc6b com.apple.CoreFoundation (6.9 - 1775.118.101) <BF802A59-20F4-3AAD-80A2-8F17D95EC542> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x18bae9000 - 0x18bd5aff7 libicucore.A.dylib (66112) <8C6F8C33-9711-3924-A158-67FE12FB1682> /usr/lib/libicucore.A.dylib
0x18bd5b000 - 0x18bd65ff7 libsystem_darwin.dylib (1439.100.3) <24EF8097-F2FE-3A7B-8967-B1ABB66D3E9D> /usr/lib/system/libsystem_darwin.dylib
0x18c19e000 - 0x18c1a9fff libsystem_notify.dylib (279.40.4) <D6E6F5C7-AF4A-3AFB-8BFB-9D15FA73061D> /usr/lib/system/libsystem_notify.dylib
0x18e170000 - 0x18e17fffb libsystem_networkextension.dylib (1295.101.1) <A9BF7C18-36A4-35CA-8954-2DD6EA2426D9> /usr/lib/system/libsystem_networkextension.dylib
0x18e1d5000 - 0x18e1ecff3 libsystem_asl.dylib (385) <F79A9C7C-D71A-371D-ACB8-BAD989D46E7D> /usr/lib/system/libsystem_asl.dylib
0x18f741000 - 0x18f748fff libsystem_symptoms.dylib (1431.100.22) <286DD4C5-E381-3B1E-A7FA-D01650331B6C> /usr/lib/system/libsystem_symptoms.dylib
0x191590000 - 0x1915a1ffb libsystem_containermanager.dylib (318.100.4) <5CDF5965-B48E-3CBA-A980-E6087AC734EC> /usr/lib/system/libsystem_containermanager.dylib
0x19220d000 - 0x192211fff libsystem_configuration.dylib (1109.101.1) <0652C679-6D13-3AC7-9941-CA71643BD051> /usr/lib/system/libsystem_configuration.dylib
0x192212000 - 0x192216ff3 libsystem_sandbox.dylib (1441.101.1) <704F03F3-ABC8-3904-8395-DFA0FA94A824> /usr/lib/system/libsystem_sandbox.dylib
0x192bd3000 - 0x192bd5ffb libquarantine.dylib (119.40.2) <B6015A7E-5A34-36E1-A075-E372C6738E16> /usr/lib/system/libquarantine.dylib
0x193136000 - 0x19313affb libsystem_coreservices.dylib (127) <D5850DD3-72A6-3BF7-8A37-4CEA4DF61CC9> /usr/lib/system/libsystem_coreservices.dylib
0x193320000 - 0x193331ff3 libz.1.dylib (76) <031516CB-4CBD-33BF-80FE-671F1539A93B> /usr/lib/libz.1.dylib
0x193332000 - 0x19335ffcb libsystem_m.dylib (3186.100.3) <549C9342-4F61-3D9E-9727-9F9B72C9F49F> /usr/lib/system/libsystem_m.dylib
0x193361000 - 0x193366ffb libmacho.dylib (980) <EDA2EE02-A2E8-32D6-8456-491AE6711D41> /usr/lib/system/libmacho.dylib
0x19337f000 - 0x19338cffb libcommonCrypto.dylib (60178.100.1) <63177DD5-51C5-3BAC-8E02-F3A435D94034> /usr/lib/system/libcommonCrypto.dylib
0x19338d000 - 0x193397fff libunwind.dylib (201) <46052246-A538-3A3D-B1CA-AA9918387228> /usr/lib/system/libunwind.dylib
0x193398000 - 0x19339ffff liboah.dylib (203.42) <099BFF77-C172-3BB3-B8EF-CC327B9596BE> /usr/lib/liboah.dylib
0x1933a0000 - 0x1933a8fff libcopyfile.dylib (173.40.2) <93F3CAE3-AD9C-3E76-A6E0-F8F068C86853> /usr/lib/system/libcopyfile.dylib
0x1933a9000 - 0x1933acfff libcompiler_rt.dylib (102.2) <7BEF62AF-3C32-3793-94F2-275F6EA29F26> /usr/lib/system/libcompiler_rt.dylib
0x1933ad000 - 0x1933affff libsystem_collections.dylib (1439.100.3) <F2BDBFD0-5145-3591-89CD-25C174F14EC5> /usr/lib/system/libsystem_collections.dylib
0x1933b0000 - 0x1933b2ffb libsystem_secinit.dylib (87.60.1) <DF976C39-729C-3AE4-AE08-B14C5A81BF11> /usr/lib/system/libsystem_secinit.dylib
0x1933b3000 - 0x1933b5fff libremovefile.dylib (49.101.1) <2E931B23-0616-36E2-A4BF-CCC1195FA107> /usr/lib/system/libremovefile.dylib
0x1933b6000 - 0x1933b6ffb libkeymgr.dylib (31) <398F9023-1475-3516-9EA6-85C00527229E> /usr/lib/system/libkeymgr.dylib
0x1933b7000 - 0x1933bffab libsystem_dnssd.dylib (1310.100.10) <42D786D2-7258-3103-80C0-E213A03F6476> /usr/lib/system/libsystem_dnssd.dylib
0x1933c0000 - 0x1933c5ff7 libcache.dylib (83) <758F8B92-8581-3370-9F97-1E3AB045122F> /usr/lib/system/libcache.dylib
0x1933c6000 - 0x1933c7ffb libSystem.B.dylib (1292.100.5) <A9F7E132-0FFC-31FC-83C6-3848CA460DF3> /usr/lib/libSystem.B.dylib
0x1933c8000 - 0x1933cbffb libfakelink.dylib (3) <7C584F63-B111-3D86-A765-DD9F3576BCCF> /usr/lib/libfakelink.dylib
0x1933cc000 - 0x1933ccfff com.apple.SoftLinking (1.0 - 1) <B3A37E5A-F2CD-3681-A16B-46166F913BC7> /System/Library/PrivateFrameworks/SoftLinking.framework/Versions/A/SoftLinking
0x1967d9000 - 0x1967d9fff liblaunch.dylib (2038.100.48) <8CA6B914-3852-3FE0-B289-6E1DB841C3CA> /usr/lib/system/liblaunch.dylib
0x198c7f000 - 0x198c7ffff libsystem_product_info_filter.dylib (8.40.1) <50BD218A-957D-3A15-BD09-A37F3C9C5499> /usr/lib/system/libsystem_product_info_filter.dylib
0x1a92c2000 - 0x1a92f2ff3 libncurses.5.4.dylib (57) <BB019339-1AD8-34A5-A813-A50C5958556F> /usr/lib/libncurses.5.4.dylib
Sample analysis of process 29100 written to file /dev/stdout
As this is is not an open-source project, I can not share it publicly. Any idea how I can debug this problem?
Note: I'm on an M1 Mac. Not yet tried on an Intel based Mac.
Thanks
David
BTW: it looks like the swift toolchain snapshots from swift.org do not include an arm64 slice. According to Activity Monitor swift-frontend and friends are of Kind Intel and not Apple.
