[Issue 21770] Wrong breakpoint location for gdb

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21770

LucienPe <lucien.perregaux at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |DebugInfo
                 CC|                            |lucien.perregaux at gmail.com

--- Comment #1 from LucienPe <lucien.perregaux at gmail.com> ---
There is two bugs:

1. `break prog.main` should say `Function "prog.main" not defined.` (because of
https://issues.dlang.org/show_bug.cgi?id=21160), but it breaks somewhere else
(end of f() in this case)

---
void main()
{
    int x = 123;
    void f()
    {
        x++;
    }
}
---

Removing `f()` produce `Function "prog.main" not defined.` ("normal"
behaviour).

2. Using `writeln` writes wrong data in the dwarf debug infos.

---
import std.stdio;

void main()
{
    writeln("x");
}
---

`llvm-dwarfdump prog`:
--
error: unexpected end of data at offset 0x804 while reading [0x15, 0x4d1d)
error: unexpected end of data at offset 0x804 while reading [0x15, 0x4d1d)

0x00000789:   DW_TAG_subprogram
                DW_AT_sibling   (0x00000852)
                DW_AT_name     
("std.exception.bailOut!(std.exception.ErrnoException).bailOut")
                DW_AT_MIPS_linkage_name
("_D3std9exception__T7bailOutHTCQBcQBb14ErrnoExceptionZQBiFNfAyamMAxaZv")
                DW_AT_decl_file ("phobos/std/exception.d")
                DW_AT_decl_line (512)
                DW_AT_low_pc    (0x000000000004db00)
                DW_AT_high_pc   (0x000000000004db7c)
                DW_AT_frame_base        (0x00000214: 
                   [0x000000000004db00, 0x000000000004db01): DW_OP_breg7 RSP+8
                   [0x000000000004db01, 0x000000000004db03): DW_OP_breg7 RSP+16
                   [0x000000000004db03, 0x000000000004db7c): DW_OP_breg6
RBP+16)

0x00000828:     DW_TAG_formal_parameter
                  DW_AT_name    ("msg")
                  DW_AT_type    (0x000004f0 "_Array_char")
                  DW_AT_artificial      (0x00)
                  DW_AT_location        (DW_OP_fbreg -64)
---
Something in bailOut is not correctly emitted / not supported.

--