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From dda5b2d02b8d8de1264f84b6267582aa7a1e5a57 Mon Sep 17 00:00:00 2001
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From: Kazuhito Hagio <k-hagio-ab@nec.com>
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Date: Tue, 31 May 2022 17:12:16 +0900
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Subject: [PATCH 08/15] gdb: print details of unnamed struct and union
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Currently gdb's "ptype" command does not print the details of unnamed
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structure and union deeper than second level in a structure, it prints
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only "{...}" instead. And crash's "struct" and similar commands also
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inherit this behavior, so we cannot get the full information of them.
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To print the details of them, change the show variable when it is an
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unnamed one like crash-7.x.
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Without the patch:
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crash> struct -o page
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struct page {
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[0] unsigned long flags;
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union {
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struct {...};
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struct {...};
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...
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With the patch:
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crash> struct -o page
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struct page {
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[0] unsigned long flags;
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union {
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struct {
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[8] struct list_head lru;
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[24] struct address_space *mapping;
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[32] unsigned long index;
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[40] unsigned long private;
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};
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struct {
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[8] dma_addr_t dma_addr;
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};
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...
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Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
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---
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gdb-10.2.patch | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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diff --git a/gdb-10.2.patch b/gdb-10.2.patch
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index b67db4e1ded9..577f5e45fc5a 100644
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--- a/gdb-10.2.patch
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+++ b/gdb-10.2.patch
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@@ -1638,3 +1638,15 @@ exit 0
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$(ECHO_CXXLD) $(CC_LD) $(INTERNAL_LDFLAGS) $(WIN32LDAPP) \
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-o $(shell /bin/cat mergeobj) $(LIBGDB_OBS) \
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$(TDEPLIBS) $(TUI_LIBRARY) $(CLIBS) $(LOADLIBES) $(shell /bin/cat mergelibs)
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+--- gdb-10.2/gdb/c-typeprint.c.orig
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++++ gdb-10.2/gdb/c-typeprint.c
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+@@ -1202,6 +1202,9 @@ c_type_print_base_struct_union (struct t
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+ = podata->end_bitpos
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+ - TYPE_LENGTH (type->field (i).type ()) * TARGET_CHAR_BIT;
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+ }
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++ else if (strlen(TYPE_FIELD_NAME (type, i)) == 0)
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++ /* crash: Print details for unnamed struct and union. */
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++ newshow = show;
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+
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+ c_print_type_1 (type->field (i).type (),
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+ TYPE_FIELD_NAME (type, i),
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--
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2.30.2
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