From 4adb7eca6ab2148026a9d2e00379cedfc2038a0d Mon Sep 17 00:00:00 2001
From: Jacob Young <jacobly0@users.noreply.github.com>
Date: Mon, 12 May 2025 19:03:04 -0400
Subject: debug: correctly detect missing entries in `.eh_frame_hdr`

---
 lib/std/debug/Dwarf.zig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'lib/std/debug/Dwarf.zig')

diff --git a/lib/std/debug/Dwarf.zig b/lib/std/debug/Dwarf.zig
index e5d47ba491..06b6c81075 100644
--- a/lib/std/debug/Dwarf.zig
+++ b/lib/std/debug/Dwarf.zig
@@ -402,7 +402,7 @@ pub const ExceptionFrameHeader = struct {
             }
         }
 
-        if (len == 0) return bad();
+        if (len == 0) return missing();
         fbr.pos = left * entry_size;
 
         // Read past the pc_begin field of the entry
@@ -460,6 +460,8 @@ pub const ExceptionFrameHeader = struct {
             @sizeOf(usize),
             native_endian,
         );
+
+        if (pc < fde.pc_begin or pc >= fde.pc_begin + fde.pc_range) return missing();
     }
 };
 
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