squiid/llvm
1
0
Fork 0
Code Issues Pull requests Activity

[lldb][NFC] Add size tests for empty records with alignment and with empty members

Browse source 
This came up during the Windows bot failure discussing after D105471 . See
also 3d9a9fa691 .
This commit is contained in:
Raphael Isemann 2021-08-30 15:16:18 +02:00
parent ffcf571107
commit 2ce889fa4e
4 changed files with 22 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
lldb/test/API/lang/c/sizeof/TestCSizeof.py
View file

@ -14,5 +14,6 @@ class TestCase(TestBase):
# Empty structs are not allowed in C, but Clang/GCC allow them and
# give them a size of 0.
self.expect_expr("sizeof(Empty) == sizeof_empty", result_value="true")
self.expect_expr("sizeof(EmptyMember) == sizeof_empty_member", result_value="true")
self.expect_expr("sizeof(SingleMember) == sizeof_single", result_value="true")
self.expect_expr("sizeof(PaddingMember) == sizeof_padding", result_value="true")

7
lldb/test/API/lang/c/sizeof/main.c
View file

@ -1,4 +1,7 @@
struct Empty {};
struct EmptyMember {
char i[0];
};
struct SingleMember {
int i;
};
@ -9,13 +12,15 @@ struct PaddingMember {
};
const unsigned sizeof_empty = sizeof(struct Empty);
const unsigned sizeof_empty_member = sizeof(struct EmptyMember);
const unsigned sizeof_single = sizeof(struct SingleMember);
const unsigned sizeof_padding = sizeof(struct PaddingMember);
int main() {
struct Empty empty;
struct EmptyMember empty_member;
struct SingleMember single;
struct PaddingMember padding;
// Make sure globals are used.
return sizeof_empty + sizeof_single + sizeof_padding;
return sizeof_empty + sizeof_empty_member + sizeof_single + sizeof_padding;
}

4
lldb/test/API/lang/cpp/sizeof/TestCPPSizeof.py
View file

@ -14,6 +14,10 @@ class TestCase(TestBase):
# Empty structs/classes have size 1 in C++.
self.expect_expr("sizeof(Empty) == sizeof_empty", result_value="true")
self.expect_expr("sizeof(EmptyClass) == sizeof_empty_class", result_value="true")
self.expect_expr("sizeof(EmptyClassAligned) == sizeof_empty_class_aligned",
result_value="true")
self.expect_expr("sizeof(ClassEmptyMember) == sizeof_class_empty_member",
result_value="true")
self.expect_expr("sizeof(SingleMember) == sizeof_single", result_value="true")
self.expect_expr("sizeof(SingleMemberClass) == sizeof_single_class", result_value="true")
self.expect_expr("sizeof(PaddingMember) == sizeof_padding", result_value="true")

13
lldb/test/API/lang/cpp/sizeof/main.cpp
View file

@ -1,5 +1,9 @@
struct Empty {};
class EmptyClass {};
class alignas(4) EmptyClassAligned {};
class ClassEmptyMember {
int i[0];
};
struct SingleMember {
int i;
@ -19,6 +23,8 @@ class PaddingMemberClass {
const unsigned sizeof_empty = sizeof(Empty);
const unsigned sizeof_empty_class = sizeof(EmptyClass);
const unsigned sizeof_empty_class_aligned = sizeof(EmptyClassAligned);
const unsigned sizeof_class_empty_member = sizeof(ClassEmptyMember);
const unsigned sizeof_single = sizeof(SingleMember);
const unsigned sizeof_single_class = sizeof(SingleMemberClass);
const unsigned sizeof_padding = sizeof(PaddingMember);
@ -27,11 +33,14 @@ const unsigned sizeof_padding_class = sizeof(PaddingMemberClass);
int main() {
Empty empty;
EmptyClass empty_class;
EmptyClassAligned empty_class_aligned;
ClassEmptyMember class_empty_member;
SingleMember single;
SingleMemberClass single_class;
PaddingMember padding;
PaddingMemberClass padding_class;
// Make sure globals are used.
return sizeof_empty + sizeof_empty_class + sizeof_single +
sizeof_single_class + sizeof_padding + sizeof_padding_class;
return sizeof_empty + sizeof_empty_class + sizeof_class_empty_member +
sizeof_single + +sizeof_empty_class_aligned + sizeof_single_class +
sizeof_padding + sizeof_padding_class;
}