vedgy added a comment.
In D139774#4039975 <https://reviews.llvm.org/D139774#4039975>, @aaron.ballman
wrote:
> Oh that is a good point! Apologies for not noticing that earlier -- that
> makes me wonder if a better approach here is to add a `std::string` to the
> `CIndexer` class to represent the temp path to use.
I have suggested the possibility in this review:
> A copy of user-provided temporary directory path buffer can be stored in
> class `CIndexer`. But this API in //llvm/Support/Path.h// would stay fragile.
So the question is whether the LLVM API or `CIndexer` should store the buffer.
The only possible caller of `system_temp_directory()` used by libclang is
`llvm::sys::fs::createUniquePath()`. This helper function is called by
`createUniqueEntity()`, which in turn is called by several other helper
functions, all in //llvm/lib/Support/Path.cpp//. Here is a backtrace from
KDevelop built against LLVM at this review's branch:
#0 llvm::sys::path::system_temp_directory(bool, llvm::SmallVectorImpl<char>&)
(ErasedOnReboot=true, Result=...) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/lib/Support/Unix/Path.inc:1451
#1 0x00007fb372a55d60 in llvm::sys::fs::createUniquePath(llvm::Twine const&,
llvm::SmallVectorImpl<char>&, bool) (Model=<optimized out>, ResultPath=...,
MakeAbsolute=<optimized out>) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/lib/Support/Path.cpp:811
#2 0x00007fb372a55eb7 in createUniqueEntity(llvm::Twine const&, int&,
llvm::SmallVectorImpl<char>&, bool, FSEntity, llvm::sys::fs::OpenFlags,
unsigned int) (Model=..., ResultFD=@0x7fb36effc2d0: 0, ResultPath=...,
MakeAbsolute=<optimized out>, Type=FS_File, Flags=llvm::sys::fs::OF_None,
Mode=384) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/lib/Support/Path.cpp:181
#3 0x00007fb372a5623b in llvm::sys::fs::createTemporaryFile
(Flags=llvm::sys::fs::OF_None, Type=FS_File, ResultPath=...,
ResultFD=@0x7fb36effc2d0: 0, Model=...) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/include/llvm/ADT/Twine.h:233
#4 llvm::sys::fs::createTemporaryFile(llvm::Twine const&, llvm::StringRef,
int&, llvm::SmallVectorImpl<char>&, FSEntity, llvm::sys::fs::OpenFlags)
(Prefix=<optimized out>, Suffix=..., ResultFD=@0x7fb36effc2d0: 0,
ResultPath=..., Type=Type@entry=FS_File, Flags=llvm::sys::fs::OF_None) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/lib/Support/Path.cpp:865
#5 0x00007fb372a56451 in llvm::sys::fs::createTemporaryFile(llvm::Twine
const&, llvm::StringRef, int&, llvm::SmallVectorImpl<char>&,
llvm::sys::fs::OpenFlags) (Prefix=<optimized out>, Suffix=...,
ResultFD=<optimized out>, ResultPath=<optimized out>, Flags=<optimized out>) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/lib/Support/Path.cpp:873
#6 0x00007fb3717cc1b7 in (anonymous namespace)::TempPCHFile::create () at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/include/llvm/ADT/Twine.h:233
#7 clang::PrecompiledPreamble::Build(clang::CompilerInvocation const&,
llvm::MemoryBuffer const*, clang::PreambleBounds, clang::DiagnosticsEngine&,
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>,
std::shared_ptr<clang::PCHContainerOperations>, bool,
clang::PreambleCallbacks&) (Invocation=..., MainFileBuffer=0x7fb35000a360,
Bounds=Bounds@entry=..., Diagnostics=..., VFS=...,
PCHContainerOps=std::shared_ptr<clang::PCHContainerOperations> (use count 5,
weak count 0) = {...}, StoreInMemory=false, Callbacks=...) at
/home/igor/Documents/C/LinuxProjects/external/llvm-project/clang/lib/Frontend/PrecompiledPreamble.cpp:421
#8 0x00007fb3717234a8 in
clang::ASTUnit::getMainBufferWithPrecompiledPreamble(std::shared_ptr<clang::PCHContainerOperations>,
clang::CompilerInvocation&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>,
bool, unsigned int) (this=0x7fb3505c44d0,
PCHContainerOps=std::shared_ptr<clang::PCHContainerOperations> (use count 5,
weak count 0) = {...}, PreambleInvocationIn=..., VFS=...,
AllowRebuild=<optimized out>, MaxLines=0) at
/usr/include/c++/12.2.0/bits/unique_ptr.h:191
#9 0x00007fb371729bd6 in
clang::ASTUnit::LoadFromCompilerInvocation(std::shared_ptr<clang::PCHContainerOperations>,
unsigned int, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>)
(this=0x7fb3505c44d0,
PCHContainerOps=std::shared_ptr<clang::PCHContainerOperations> (use count 5,
weak count 0) = {...}, PrecompilePreambleAfterNParses=<optimized out>, VFS=...)
at
/home/igor/Documents/C/LinuxProjects/external/llvm-project/clang/lib/Frontend/ASTUnit.cpp:1685
#10 0x00007fb37172e359 in clang::ASTUnit::LoadFromCommandLine(char const**,
char const**, std::shared_ptr<clang::PCHContainerOperations>,
llvm::IntrusiveRefCntPtr<clang::DiagnosticsEngine>, llvm::StringRef, bool,
clang::CaptureDiagsKind,
llvm::ArrayRef<std::pair<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >, llvm::MemoryBuffer*> >, bool,
unsigned int, clang::TranslationUnitKind, bool, bool, bool,
clang::SkipFunctionBodiesScope, bool, bool, bool, bool,
llvm::Optional<llvm::StringRef>, std::unique_ptr<clang::ASTUnit,
std::default_delete<clang::ASTUnit> >*,
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) (ArgBegin=<optimized out>,
ArgEnd=<optimized out>,
PCHContainerOps=std::shared_ptr<clang::PCHContainerOperations> (empty) = {...},
Diags=..., ResourceFilesPath=..., OnlyLocalDecls=false,
CaptureDiagnostics=clang::CaptureDiagsKind::All, RemappedFiles=...,
RemappedFilesKeepOriginalName=true, PrecompilePreambleAfterNParses=1,
TUKind=clang::TU_Complete, CacheCodeCompletionResults=true,
IncludeBriefCommentsInCodeCompletion=false, AllowPCHWithCompilerErrors=true,
SkipFunctionBodies=clang::SkipFunctionBodiesScope::None, SingleFileParse=false,
UserFilesAreVolatile=true, ForSerialization=false,
RetainExcludedConditionalBlocks=false, ModuleFormat=..., ErrAST=0x7fb36effd2d8,
VFS=...) at
/home/igor/Documents/C/LinuxProjects/external/llvm-project/clang/lib/Frontend/ASTUnit.cpp:1822
#11 0x00007fb37104e462 in clang_parseTranslationUnit_Impl(CXIndex, char
const*, char const* const*, int, llvm::ArrayRef<CXUnsavedFile>, unsigned int,
CXTranslationUnit*) (CIdx=0x55dbe16c9360, source_filename=<optimized out>,
command_line_args=<optimized out>, num_command_line_args=<optimized out>,
unsaved_files=..., options=781, out_TU=0x7fb35ca7f630) at
/usr/include/c++/12.2.0/bits/stl_vector.h:987
#12 0x00007fb37104f2b4 in operator() (__closure=0x7fb37a7b6f40) at
/home/igor/Documents/C/LinuxProjects/external/llvm-project/clang/tools/libclang/CIndex.cpp:3976
#13
llvm::function_ref<void()>::callback_fn<clang_parseTranslationUnit2FullArgv(CXIndex,
char const*, char const* const*, int, CXUnsavedFile*, unsigned int, unsigned
int, CXTranslationUnitImpl**)::<lambda()> >(intptr_t)
(callable=callable@entry=140408830783296) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:45
#14 0x00007fb3729cc6e0 in llvm::function_ref<void ()>::operator()() const
(this=<synthetic pointer>) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:68
#15 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>)
(this=<optimized out>, Fn=...) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:433
#16 0x00007fb3729cc724 in RunSafelyOnThread_Dispatch(void*)
(UserData=0x7fb37a7b6e80) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:514
#17 0x00007fb3729cc19a in llvm::thread::Apply<void (*)(void*), (anonymous
namespace)::RunSafelyOnThreadInfo*, 0> (Callee=std::tuple containing = {...})
at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/include/llvm/Support/thread.h:42
#18 llvm::thread::GenericThreadProxy<std::tuple<void (*)(void*), (anonymous
namespace)::RunSafelyOnThreadInfo*> > (Ptr=0x55dbe3921080) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/include/llvm/Support/thread.h:50
#19 llvm::thread::ThreadProxy<std::tuple<void (*)(void*), (anonymous
namespace)::RunSafelyOnThreadInfo*> >(void*) (Ptr=0x55dbe3921080) at
/home/Mint14_home/igor/Documents/C/LinuxProjects/external/llvm-project/llvm/include/llvm/Support/thread.h:60
#20 0x00007fb3e909f8fd in () at /usr/lib/libc.so.6
#21 0x00007fb3e9121a60 in () at /usr/lib/libc.so.6
Repository:
rG LLVM Github Monorepo
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https://reviews.llvm.org/D139774/new/
https://reviews.llvm.org/D139774
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