[PATCH] D116011: [Clang] Own the CommandLineArgs in CodeGenOptions

[Alexandre Ganea via Phabricator via cfe-commits]

aganea created this revision.
aganea added reviewers: hans, aheejin, jansvoboda11.
Herald added a subscriber: dexonsmith.
aganea requested review of this revision.
Herald added projects: clang, LLVM.
Herald added subscribers: llvm-commits, cfe-commits.

As reported in PR52704: https://github.com/llvm/llvm-project/issues/52704

Since the round-tripping generates function-local arguments, before this patch accessing `CodeGenOptions.CommandLineArgs` or `MCTargetOptions.CommandLineArgs` used to keep references on free'd data.

+ at hans for the `CC1Command` change which otherwise blocks the usage `append_range`. This was unconsistent with how `CommandLineArgs` were passed around in other places (without the terminating `nullptr` element).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116011

Files:
  clang/include/clang/Basic/CodeGenOptions.h
  clang/lib/Driver/Job.cpp
  clang/lib/Frontend/CompilerInvocation.cpp
  llvm/include/llvm/MC/MCTargetOptions.h


Index: llvm/include/llvm/MC/MCTargetOptions.h
===================================================================
--- llvm/include/llvm/MC/MCTargetOptions.h
+++ llvm/include/llvm/MC/MCTargetOptions.h
@@ -64,7 +64,7 @@
   std::string SplitDwarfFile;
 
   const char *Argv0 = nullptr;
-  ArrayRef<const char *> CommandLineArgs;
+  ArrayRef<std::string> CommandLineArgs;
 
   /// Additional paths to search for `.include` directives when using the
   /// integrated assembler.
Index: clang/lib/Frontend/CompilerInvocation.cpp
===================================================================
--- clang/lib/Frontend/CompilerInvocation.cpp
+++ clang/lib/Frontend/CompilerInvocation.cpp
@@ -4520,7 +4520,7 @@
 
   // Store the command-line for using in the CodeView backend.
   Res.getCodeGenOpts().Argv0 = Argv0;
-  Res.getCodeGenOpts().CommandLineArgs = CommandLineArgs;
+  append_range(Res.getCodeGenOpts().CommandLineArgs, CommandLineArgs);
 
   FixupInvocation(Res, Diags, Args, DashX);
 
Index: clang/lib/Driver/Job.cpp
===================================================================
--- clang/lib/Driver/Job.cpp
+++ clang/lib/Driver/Job.cpp
@@ -387,7 +387,6 @@
   SmallVector<const char *, 128> Argv;
   Argv.push_back(getExecutable());
   Argv.append(getArguments().begin(), getArguments().end());
-  Argv.push_back(nullptr);
 
   // This flag simply indicates that the program couldn't start, which isn't
   // applicable here.
Index: clang/include/clang/Basic/CodeGenOptions.h
===================================================================
--- clang/include/clang/Basic/CodeGenOptions.h
+++ clang/include/clang/Basic/CodeGenOptions.h
@@ -395,7 +395,7 @@
   /// Executable and command-line used to create a given CompilerInvocation.
   /// Most of the time this will be the full -cc1 command.
   const char *Argv0 = nullptr;
-  ArrayRef<const char *> CommandLineArgs;
+  std::vector<std::string> CommandLineArgs;
 
   /// The minimum hotness value a diagnostic needs in order to be included in
   /// optimization diagnostics.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D116011.395359.patch
Type: text/x-patch
Size: 2041 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20211220/4e88eac2/attachment.bin>