On Tue, May 31, 2022 at 4:12 PM HAGIO KAZUHITO(萩尾　一仁) <k-hagio-ab(a)nec.com <mailto:k-hagio-ab@nec.com>> wrote: Currently gdb's "ptype" command does not print the details of unnamed structure and union deeper than second level in a structure, it prints only "{...}" instead.  And crash's "struct" and similar commands also inherit this behavior, so we cannot get the full information of them. To print the details of them, change the show variable when it is an unnamed one like crash-7.x. Without the patch:    crash> struct -o page    struct page {       [0] unsigned long flags;           union {               struct {...};               struct {...};    ... With the patch:    crash> struct -o page    struct page {       [0] unsigned long flags;           union {               struct {       [8]         struct list_head lru;      [24]         struct address_space *mapping;      [32]         unsigned long index;      [40]         unsigned long private;               };               struct {       [8]         dma_addr_t dma_addr;               };    ... Signed-off-by: Kazuhito Hagio <k-hagio-ab(a)nec.com <mailto:k-hagio-ab@nec.com>> ---   gdb-10.2.patch | 12 ++++++++++++   1 file changed, 12 insertions(+) diff --git a/gdb-10.2.patch b/gdb-10.2.patch index b67db4e1ded9..603679657eee 100644 --- a/gdb-10.2.patch +++ b/gdb-10.2.patch @@ -1638,3 +1638,15 @@ exit 0         $(ECHO_CXXLD) $(CC_LD) $(INTERNAL_LDFLAGS) $(WIN32LDAPP) \                    -o $(shell /bin/cat mergeobj) $(LIBGDB_OBS) \                    $(TDEPLIBS) $(TUI_LIBRARY) $(CLIBS) $(LOADLIBES) $(shell /bin/cat mergelibs) +--- gdb-10.2/gdb/c-typeprint.c.orig ++++ gdb-10.2/gdb/c-typeprint.c +@@ -1202,6 +1202,9 @@ c_type_print_base_struct_union (struct t +               = podata->end_bitpos +                 - TYPE_LENGTH (type->field (i).type ()) * TARGET_CHAR_BIT; +           } ++        else if (strlen(TYPE_FIELD_NAME (type, i)) == 0) ++          /* crash: Print details for unnamed struct and union. */ ++          newshow = show; + +         c_print_type_1 (type->field (i).type (), +                         TYPE_FIELD_NAME (type, i), Thank you for working on this issue, Kazu. Acked-by: Lianbo Jiang <lijiang(a)redhat.com <mailto:lijiang@redhat.com>>