hubert.reinterpretcast added a comment.
In D153536#4483182 <https://reviews.llvm.org/D153536#4483182>,
@hubert.reinterpretcast wrote:
> If `llvm-dwarfdump` is to be believed, it looks like a compiler bug (two
> members reported at the same offset).
Similarly, only one local variable out of two in the same line reported:
$ cat placeholderDbg2.cc
extern "C" int printf(const char *, ...);
struct A {
A(int x) : x(x) { }
~A() { printf("%d\n", x); }
int x;
};
int main() {
A _ = 0, _ = 1;
return 0;
}
Return: 0x00:0 Sat Jul 8 23:52:46 2023 EDT
(lldb) target create "a.out"
Current executable set to '/terrannew/hstong/.Lpcoral03/llvmbld/a.out'
(powerpc64le).
(lldb) b 9
Breakpoint 1: where = a.out`main + 68 at placeholderDbg2.cc:9:3, address =
0x0000000000010ab4
(lldb) r
Process 2951717 launched: '/terrannew/hstong/.Lpcoral03/llvmbld/a.out'
(powerpc64le)
Process 2951717 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x0000000100010ab4 a.out`main at placeholderDbg2.cc:9:3
6 };
7 int main() {
8 A _ = 0, _ = 1;
-> 9 return 0;
10 }
(lldb) var
(A) _ = (x = 0)
(lldb) c
Process 2951717 resuming
1
0
Process 2951717 exited with status = 0 (0x00000000)
(lldb) q
0x0000009b: DW_TAG_subprogram [14] * (0x0000000b)
DW_AT_low_pc [DW_FORM_addr] (0x0000000000010a70)
DW_AT_high_pc [DW_FORM_data4] (0x000000b4)
DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg31 X31)
DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000086] =
"main")
DW_AT_decl_file [DW_FORM_data1]
("/terrannew/hstong/.Lpcoral03/llvmbld/placeholderDbg2.cc")
DW_AT_decl_line [DW_FORM_data1] (7)
DW_AT_type [DW_FORM_ref4] (cu + 0x008f => {0x0000008f}
"int")
DW_AT_external [DW_FORM_flag_present] (true)
0x000000b4: DW_TAG_variable [15] (0x0000009b)
DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +128)
DW_AT_name [DW_FORM_strp] ( .debug_str[0x0000008b] =
"_")
DW_AT_decl_file [DW_FORM_data1]
("/terrannew/hstong/.Lpcoral03/llvmbld/placeholderDbg2.cc")
DW_AT_decl_line [DW_FORM_data1] (8)
DW_AT_type [DW_FORM_ref4] (cu + 0x005a => {0x0000005a}
"A")
0x000000c3: NULL
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D153536/new/
https://reviews.llvm.org/D153536
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