From 4f180d5396741eb65badba70cf5077b7d48f8641 Mon Sep 17 00:00:00 2001 From: Ali Tamur via gdb-patches Date: Fri, 21 Feb 2020 08:19:21 -0700 Subject: [PATCH] Check for null result from gdb_demangle I am sending this patch on behalf of kmoy@google.com, who discovered the bug and wrote the fix. gdb_demangle can return null for strings that don't properly demangle. The null check was mistakenly removed in commit 43816ebc335. Without this check, GDB aborts when loading symbols from some binaries. gdb/ChangeLog 2020-02-21 Ali Tamur * dwarf2/read.c (dwarf2_name): Add null check. --- gdb/ChangeLog | 4 ++++ gdb/dwarf2/read.c | 2 ++ 2 files changed, 6 insertions(+) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 748788acac1..d480ff4e159 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,7 @@ +2020-02-21 Ali Tamur + + * dwarf2/read.c (dwarf2_name): Add null check. + 2020-02-20 Tom Tromey * dwarf2/read.c (dwarf2_find_containing_comp_unit): Use ">", not diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index f998fe6b8d0..46d510eb274 100644 --- a/gdb/dwarf2/read.c +++ b/gdb/dwarf2/read.c @@ -21756,6 +21756,8 @@ dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) { gdb::unique_xmalloc_ptr demangled (gdb_demangle (DW_STRING (attr), DMGL_TYPES)); + if (demangled == nullptr) + return nullptr; const char *base; -- 2.30.2