[llvm-cov] Error-out when an unsupported format is used (PR32087)

llvm-svn: 296487

1 files changed, 8 insertions, 1 deletions

diff --git a/llvm/tools/llvm-cov/CodeCoverage.cpp b/llvm/tools/llvm-cov/CodeCoverage.cpp
index 781d1948ccd..6179c760d5b 100644
--- a/llvm/tools/llvm-cov/CodeCoverage.cpp
+++ b/llvm/tools/llvm-cov/CodeCoverage.cpp
@@ -818,8 +818,10 @@ int CodeCoverageTool::report(int argc, const char **argv,
   if (Err)
     return Err;
 
-  if (ViewOpts.Format == CoverageViewOptions::OutputFormat::HTML)
+  if (ViewOpts.Format == CoverageViewOptions::OutputFormat::HTML) {
     error("HTML output for summary reports is not yet supported.");
+    return 1;
+  }
 
   auto Coverage = load();
   if (!Coverage)
@@ -840,6 +842,11 @@ int CodeCoverageTool::export_(int argc, const char **argv,
   if (Err)
     return Err;
 
+  if (ViewOpts.Format != CoverageViewOptions::OutputFormat::Text) {
+    error("Coverage data can only be exported as textual JSON.");
+    return 1;
+  }
+
   auto Coverage = load();
   if (!Coverage) {
     error("Could not load coverage information");