diff --git a/llvm/lib/Support/Unix/Signals.inc b/llvm/lib/Support/Unix/Signals.inc
--- a/llvm/lib/Support/Unix/Signals.inc
+++ b/llvm/lib/Support/Unix/Signals.inc
@@ -561,8 +561,11 @@
 #if ENABLE_BACKTRACES
   static void *StackTrace[256];
   int depth = 0;
-#if defined(HAVE_BACKTRACE)
+#if defined(HAVE_BACKTRACE) && !defined(__riscv)
   // Use backtrace() to output a backtrace on Linux systems with glibc.
+  // Don't use it on RISC-V Linux because it's highly unlikely to work but it
+  // may return 1 or 2 entries, preventing the retry with _Unwind_Backtrace
+  // below.
   if (!depth)
     depth = backtrace(StackTrace, static_cast<int>(std::size(StackTrace)));
 #endif