[PATCH] D120484: More explicit message when failing to find a mandatory cfi ressource file

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serge-sans-paille created this revision.
serge-sans-paille added a reviewer: thakis.
serge-sans-paille requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

Compiler-rt doesn't provide support file for cfi on s390x ad ppc64le (at least). When trying to use the flag, we get a file error.
This is an attempt at making the error more explicit, maybe we should also suggest passing `-fno-sanitize-ignorelist`?


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D120484

Files:
  clang/include/clang/Basic/DiagnosticDriverKinds.td
  clang/lib/Driver/SanitizerArgs.cpp


Index: clang/lib/Driver/SanitizerArgs.cpp
===================================================================
--- clang/lib/Driver/SanitizerArgs.cpp
+++ clang/lib/Driver/SanitizerArgs.cpp
@@ -168,7 +168,7 @@
     else if (BL.Mask == SanitizerKind::CFI && DiagnoseErrors)
       // If cfi_ignorelist.txt cannot be found in the resource dir, driver
       // should fail.
-      D.Diag(clang::diag::err_drv_no_such_file) << Path;
+      D.Diag(clang::diag::err_drv_missing_sanitizer_ignorelist) << Path;
   }
   validateSpecialCaseListFormat(
       D, IgnorelistFiles, clang::diag::err_drv_malformed_sanitizer_ignorelist,
Index: clang/include/clang/Basic/DiagnosticDriverKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticDriverKinds.td
+++ clang/include/clang/Basic/DiagnosticDriverKinds.td
@@ -205,6 +205,8 @@
   "invalid deployment target for -stdlib=libc++ (requires %0 or later)">;
 def err_drv_invalid_argument_to_option : Error<
   "invalid argument '%0' to -%1">;
+def err_drv_missing_sanitizer_ignorelist : Error<
+  "missing required sanitizer ignorelist: '%0'">;
 def err_drv_malformed_sanitizer_ignorelist : Error<
   "malformed sanitizer ignorelist: '%0'">;
 def err_drv_malformed_sanitizer_coverage_allowlist : Error<


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