diff --git a/clang/include/clang/Rewrite/Frontend/FixItRewriter.h b/clang/include/clang/Rewrite/Frontend/FixItRewriter.h index ad828e55ae88..3b1b31e0cdee 100644 --- a/clang/include/clang/Rewrite/Frontend/FixItRewriter.h +++ b/clang/include/clang/Rewrite/Frontend/FixItRewriter.h @@ -27,7 +27,7 @@ class FileEntry; class FixItOptions { public: - FixItOptions() : FixWhatYouCan(false), + FixItOptions() : InPlace(false), FixWhatYouCan(false), FixOnlyWarnings(false), Silent(false) { } virtual ~FixItOptions(); @@ -41,6 +41,10 @@ public: /// virtual std::string RewriteFilename(const std::string &Filename, int &fd) = 0; + /// True if files should be updated in place. RewriteFilename is only called + /// if this is false. + bool InPlace; + /// \brief Whether to abort fixing a file when not all errors could be fixed. bool FixWhatYouCan; diff --git a/clang/lib/Frontend/Rewrite/FixItRewriter.cpp b/clang/lib/Frontend/Rewrite/FixItRewriter.cpp index a3e14f9f020e..dc787ac9557c 100644 --- a/clang/lib/Frontend/Rewrite/FixItRewriter.cpp +++ b/clang/lib/Frontend/Rewrite/FixItRewriter.cpp @@ -81,6 +81,13 @@ bool FixItRewriter::WriteFixedFiles( RewritesReceiver Rec(Rewrite); Editor.applyRewrites(Rec); + if (FixItOpts->InPlace) { + // Overwriting open files on Windows is tricky, but the rewriter can do it + // for us. + Rewrite.overwriteChangedFiles(); + return false; + } + for (iterator I = buffer_begin(), E = buffer_end(); I != E; ++I) { const FileEntry *Entry = Rewrite.getSourceMgr().getFileEntryForID(I->first); int fd; diff --git a/clang/lib/Frontend/Rewrite/FrontendActions.cpp b/clang/lib/Frontend/Rewrite/FrontendActions.cpp index 1b5eb2855bea..dbc661b71905 100644 --- a/clang/lib/Frontend/Rewrite/FrontendActions.cpp +++ b/clang/lib/Frontend/Rewrite/FrontendActions.cpp @@ -48,9 +48,10 @@ FixItAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { namespace { class FixItRewriteInPlace : public FixItOptions { public: + FixItRewriteInPlace() { InPlace = true; } + std::string RewriteFilename(const std::string &Filename, int &fd) override { - fd = -1; - return Filename; + llvm_unreachable("don't call RewriteFilename for inplace rewrites"); } }; diff --git a/clang/test/FixIt/fixit-large-file.cpp b/clang/test/FixIt/fixit-large-file.cpp new file mode 100644 index 000000000000..a1dab53489c7 --- /dev/null +++ b/clang/test/FixIt/fixit-large-file.cpp @@ -0,0 +1,318 @@ +// Don't modify the source in place, since it might be readonly. +// RUN: cp %s %t.cpp +// RUN: not %clang_cc1 -fixit %t.cpp 2>&1 | FileCheck %s + +struct A { int x; }; +int foo(A *p) { + return p.x; +} + +// CHECK: error: member reference type 'A *' is a pointer; did you mean to use '->'? +// CHECK: note: FIX-IT applied suggested code changes +// CHECK-NOT: error: + +// The following comment block makes the file at least 16K, which causes clang +// to mmap it. This caused an issue with clang on Windows, where you cannot +// write a file which is currently mapped. +// +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +// 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