Added int128 types to dwarf base_type_name_to_size table
so that the correct base type size can be retrieved in certain
cases. Note that for type "unsigned __int128", the dwarf in gcc
has type name "__int128 unsigned" while clang has
"unsigned __int128".
-bash-4.4$ cat t.c
struct t {
__int128 si128a;
__int128 si128b;
unsigned __int128 bits3:3;
unsigned __int128 bits80:80;
unsigned __int128 ui128;
} g;
-bash-4.4$ clang -O2 -c -g -target bpf -Xclang -target-feature -Xclang +dwarfris t.c
-bash-4.4$ pahole -F dwarf t.o
struct t {
__int128 si128a; /* 0 16 */
__int128 si128b; /* 16 16 */
unsigned __int128 bits3:3; /* 32:125 16 */
unsigned __int128 bits80:80; /* 32:45 16 */
/* XXX 45 bits hole, try to pack */
unsigned __int128 ui128; /* 48 16 */
/* size: 64, cachelines: 1, members: 5 */
/* bit holes: 1, sum bit holes: 45 bits */
};
-bash-4.4$ pahole -F btf t.o
struct t {
__int128 si128a; /* 0 16 */
__int128 si128b; /* 16 16 */
unsigned __int128 bits3:3; /* 32:125 16 */
unsigned __int128 bits80:80; /* 32:45 16 */
/* XXX 45 bits hole, try to pack */
unsigned __int128 ui128; /* 48 16 */
/* size: 64, cachelines: 1, members: 5 */
/* bit holes: 1, sum bit holes: 45 bits */
};
-bash-4.4$ pahole -JV t.o
File t.o:
[1] STRUCT t kind_flag=1 size=64 vlen=5
si128a type_id=2 bitfield_size=0 bits_offset=0
si128b type_id=2 bitfield_size=0 bits_offset=128
bits3 type_id=3 bitfield_size=3 bits_offset=256
bits80 type_id=3 bitfield_size=80 bits_offset=259
ui128 type_id=3 bitfield_size=0 bits_offset=384
[2] INT __int128 size=16 bit_offset=0 nr_bits=128 encoding=SIGNED
[3] INT unsigned __int128 size=16 bit_offset=0 nr_bits=128 encoding=(none)
[4] INT (anon) size=4 bit_offset=0 nr_bits=32 encoding=(none)
-bash-4.4$
Signed-off-by: Yonghong Song <yhs@xxxxxx>
---
dwarves.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/dwarves.c b/dwarves.c
index 0f7e367..1afd85c 100644
--- a/dwarves.c
+++ b/dwarves.c
@@ -169,6 +169,9 @@ static struct base_type_name_to_size {
{ .name = "float", .size = 32, },
{ .name = "long double", .size = 64, },
{ .name = "long double long double", .size = 64, },
+ { .name = "__int128", .size = 128, },
+ { .name = "unsigned __int128", .size = 128, },
+ { .name = "__int128 unsigned", .size = 128, },
{ .name = NULL },
};
--
2.17.1
