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Fix crash with stepi, no debug info, and "set debug infrun 1"

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A stepi in a function without debug info with "set debug infrun 1"
crashes GDB since commit c8353d682f69 (gdb/infrun: some extra infrun
debug print statements), due to a reference to
"tp->current_symtab->filename" when tp->current_symtab is null.

This commit adds the missing null check.  The output in this case
becomes:

  [infrun] set_step_info: symtab = <null>, line = 0, step_frame_id = {stack=0x7fffffffd980,code=0x0000000000456c30,!special}, step_stack_frame_id = {stack=0x7fffffffd980,code=0x0000000000456c30,!special}

Change-Id: I5171a9d222bc7e15b9dba2feaba7d55c7acd99f8
This commit is contained in:
Pedro Alves
2022-03-18 19:14:25 +00:00
parent da729c5ccd
commit b7e077222e
1 changed files with 2 additions and 1 deletions
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3
gdb/infrun.c
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@ -4180,7 +4180,8 @@ set_step_info (thread_info *tp, struct frame_info *frame,
infrun_debug_printf
("symtab = %s, line = %d, step_frame_id = %s, step_stack_frame_id = %s",
tp->current_symtab->filename, tp->current_line,
tp->current_symtab != nullptr ? tp->current_symtab->filename : "<null>",
tp->current_line,
tp->control.step_frame_id.to_string ().c_str (),
tp->control.step_stack_frame_id.to_string ().c_str ());
}