gdb: Avoid warning for the jump command inside an inline function.

When stopped inside an inline function, trying to jump to a different line
of the same function currently results in a warning about jumping to another
function.  Fix this by taking inline functions into account.

Before:
  Breakpoint 1, function_inline (x=510) at jump-inline.cpp:22
  22        a = a + x;             /* inline-funct */
  (gdb) j 21
  Line 21 is not in `function_inline(int)'.  Jump anyway? (y or n)

After:
  Breakpoint 2, function_inline (x=510) at jump-inline.cpp:22
  22        a = a + x;            /* inline-funct */
  (gdb) j 21
  Continuing at 0x400679.

  Breakpoint 1, function_inline (x=510) at jump-inline.cpp:21
  21        a += 1020 + a;                /* increment-funct */

This was regression-tested on X86-64 Linux.

Co-Authored-by: Cristian Sandu <cristian.sandu@intel.com>
Approved-By: Andrew Burgess <aburgess@redhat.com>

gdb/infcmd.c

@@ -1081,7 +1081,8 @@ jump_command (const char *arg, int from_tty)
 
   /* See if we are trying to jump to another function.  */
   fn = get_frame_function (get_current_frame ());
-  sfn = find_pc_function (sal.pc);
+  sfn = find_pc_sect_containing_function (sal.pc,
+					  find_pc_mapped_section (sal.pc));
   if (fn != nullptr && sfn != fn)
     {
       if (!query (_("Line %d is not in `%s'.  Jump anyway? "), sal.line,

gdb/testsuite/gdb.base/jump-inline.c

@@ -0,0 +1,30 @@
+/* Copyright 2021-2023 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+__attribute__((always_inline))
+static void inline
+function_inline (int x)
+{
+  int a = x;
+  a += 1020 + a;		/* increment-funct. */
+  a = a + x;			/* inline-funct. */
+}
+
+int
+main ()
+{
+  function_inline (510);
+  return 0;			/* out-of-func. */
+}

gdb/testsuite/gdb.base/jump-inline.exp

@@ -0,0 +1,44 @@
+# Copyright 2021-2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+#
+# Test support for jump in inline functions.
+
+standard_testfile
+
+if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
+    return -1
+}
+
+if { ![runto_main] } {
+    return -1
+}
+
+gdb_breakpoint [gdb_get_line_number "inline-funct"]
+gdb_continue_to_breakpoint "inline-funct" ".*inline-funct.*"
+
+# Test jump to another function - main.
+set out_func [gdb_get_line_number "out-of-func"]
+gdb_test "jump $out_func" \
+    "Not confirmed.*" \
+    "aborted jump out of current function" \
+    "Line $out_func is not in `function_inline.*'.  Jump anyway.*y or n. $" \
+    "n"
+
+# Test jump in the same inline function.
+set increment [gdb_get_line_number "increment-funct"]
+gdb_breakpoint $increment
+gdb_test "jump $increment" "Breakpoint .* at .*:$increment.*"
+gdb_test "next" ".*inline-funct.*"
+gdb_test "print a" "= 5100"