[PATCH] D49594: [DebugInfo] Emit diagnostics when enabling -fdebug-types-section on non-linux target.

[Jonas Devlieghere via Phabricator via cfe-commits]

JDevlieghere created this revision.
JDevlieghere added reviewers: labath, dblaikie, probinson.

Currently, support for debug_types is only present for ELF and trying to pass 
-fdebug-types-section for other targets results in a crash in the backend. 
Until this is fixed, we should emit a diagnostic in the front end when the 
option is passed for non-linux targets.


Repository:
  rC Clang

https://reviews.llvm.org/D49594

Files:
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/test/Driver/debug-options.c


Index: clang/test/Driver/debug-options.c
===================================================================
--- clang/test/Driver/debug-options.c
+++ clang/test/Driver/debug-options.c
@@ -139,12 +139,18 @@
 //
 // RUN: %clang -### -c -gdwarf-aranges %s 2>&1 | FileCheck 
-check-prefix=GARANGE %s
 //
-// RUN: %clang -### -fdebug-types-section %s 2>&1 \
+// RUN: %clang -### -fdebug-types-section -target x86_64-unknown-linux %s 2>&1 
\
 // RUN:        | FileCheck -check-prefix=FDTS %s
 //
-// RUN: %clang -### -fdebug-types-section -fno-debug-types-section %s 2>&1 \
+// RUN: %clang -### -fdebug-types-section -fno-debug-types-section -target 
x86_64-unknown-linux %s 2>&1 \
 // RUN:        | FileCheck -check-prefix=NOFDTS %s
 //
+// RUN: %clang -### -fdebug-types-section -target x86_64-apple-darwin %s 2>&1 \
+// RUN:        | FileCheck -check-prefix=FDTSE %s
+//
+// RUN: %clang -### -fdebug-types-section -fno-debug-types-section -target 
x86_64-apple-darwin %s 2>&1 \
+// RUN:        | FileCheck -check-prefix=NOFDTSE %s
+//
 // RUN: %clang -### -g -gno-column-info %s 2>&1 \
 // RUN:        | FileCheck -check-prefix=NOCI %s
 //
@@ -229,8 +235,10 @@
 // GARANGE: -generate-arange-section
 //
 // FDTS: "-mllvm" "-generate-type-units"
+// FDTSE: error: unsupported option '-fdebug-types-section' for target 
'x86_64-apple-darwin'
 //
 // NOFDTS-NOT: "-mllvm" "-generate-type-units"
+// NOFDTSE-NOT: error: unsupported option '-fdebug-types-section' for target 
'x86_64-apple-darwin'
 //
 // CI: "-dwarf-column-info"
 //
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -3028,6 +3028,11 @@
 
   if (Args.hasFlag(options::OPT_fdebug_types_section,
                    options::OPT_fno_debug_types_section, false)) {
+    if (!T.isOSLinux())
+      D.Diag(diag::err_drv_unsupported_opt_for_target)
+          << Args.getLastArg(options::OPT_fdebug_types_section)
+                 ->getAsString(Args)
+          << T.getTriple();
     CmdArgs.push_back("-mllvm");
     CmdArgs.push_back("-generate-type-units");
   }



Index: clang/test/Driver/debug-options.c
===================================================================
--- clang/test/Driver/debug-options.c
+++ clang/test/Driver/debug-options.c
@@ -139,12 +139,18 @@
 //
 // RUN: %clang -### -c -gdwarf-aranges %s 2>&1 | FileCheck -check-prefix=GARANGE %s
 //
-// RUN: %clang -### -fdebug-types-section %s 2>&1 \
+// RUN: %clang -### -fdebug-types-section -target x86_64-unknown-linux %s 2>&1 \
 // RUN:        | FileCheck -check-prefix=FDTS %s
 //
-// RUN: %clang -### -fdebug-types-section -fno-debug-types-section %s 2>&1 \
+// RUN: %clang -### -fdebug-types-section -fno-debug-types-section -target x86_64-unknown-linux %s 2>&1 \
 // RUN:        | FileCheck -check-prefix=NOFDTS %s
 //
+// RUN: %clang -### -fdebug-types-section -target x86_64-apple-darwin %s 2>&1 \
+// RUN:        | FileCheck -check-prefix=FDTSE %s
+//
+// RUN: %clang -### -fdebug-types-section -fno-debug-types-section -target x86_64-apple-darwin %s 2>&1 \
+// RUN:        | FileCheck -check-prefix=NOFDTSE %s
+//
 // RUN: %clang -### -g -gno-column-info %s 2>&1 \
 // RUN:        | FileCheck -check-prefix=NOCI %s
 //
@@ -229,8 +235,10 @@
 // GARANGE: -generate-arange-section
 //
 // FDTS: "-mllvm" "-generate-type-units"
+// FDTSE: error: unsupported option '-fdebug-types-section' for target 'x86_64-apple-darwin'
 //
 // NOFDTS-NOT: "-mllvm" "-generate-type-units"
+// NOFDTSE-NOT: error: unsupported option '-fdebug-types-section' for target 'x86_64-apple-darwin'
 //
 // CI: "-dwarf-column-info"
 //
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -3028,6 +3028,11 @@
 
   if (Args.hasFlag(options::OPT_fdebug_types_section,
                    options::OPT_fno_debug_types_section, false)) {
+    if (!T.isOSLinux())
+      D.Diag(diag::err_drv_unsupported_opt_for_target)
+          << Args.getLastArg(options::OPT_fdebug_types_section)
+                 ->getAsString(Args)
+          << T.getTriple();
     CmdArgs.push_back("-mllvm");
     CmdArgs.push_back("-generate-type-units");
   }

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