[binutils-gdb] gdb: fix maint info btrace

https://sourceware.org/git/gitweb.cgi?p=3Dbinutils-gdb.git;h=3D2d3ff0f750c1=
2b0ca2f9e572d3a22e63200ba913

commit 2d3ff0f750c12b0ca2f9e572d3a22e63200ba913
Author: Markus Metzger <[email protected]>
Date:   Wed Jul 22 07:39:24 2026 +0000

    gdb: fix maint info btrace
   =20
    The 'maint info btrace' command forgets to check whether the trace has
    already been decoded and keeps appending the same trace to the packet
    history at every command.  Fix that.
   =20
    Reviewed-by: Tom Tromey <[email protected]>

Diff:
---
 gdb/btrace.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/gdb/btrace.c b/gdb/btrace.c
index 5349a89001a..f5f2d6da972 100644
--- a/gdb/btrace.c
+++ b/gdb/btrace.c
@@ -3546,10 +3546,14 @@ maint_info_btrace_cmd (const char *args, int from_t=
ty)
 		    version.minor, version.build,
 		    version.ext !=3D NULL ? version.ext : "");
=20
-	btrace_maint_update_pt_packets (btinfo);
+	if (btinfo->maint.variant.pt.packets =3D=3D nullptr)
+	  btinfo->maint.variant.pt.packets =3D new std::vector<btrace_pt_packet>;
+
+	if (btinfo->maint.variant.pt.packets->empty ())
+	  btrace_maint_update_pt_packets (btinfo);
+
 	gdb_printf (_("Number of packets: %zu.\n"),
-		    ((btinfo->maint.variant.pt.packets =3D=3D nullptr)
-		     ? 0 : btinfo->maint.variant.pt.packets->size ()));
+		    btinfo->maint.variant.pt.packets->size ());
       }
       break;
 #endif /* defined (HAVE_LIBIPT)  */