e08d8e3d16
This test was failing with the native plugin due to two reasons:
1. The static `C::abc` was printed as `(int) ::C::abc = 123`
2. The order of the base classes of [`C`
(`List::Value`)](b7e4edca3d/lldb/test/Shell/SymbolFile/PDB/Inputs/UdtLayoutTest.cpp (L30))
is different between DIA and the native plugin. I don't know how the
order in the DIA plugin is determined - it prints `B<0>`, `B<1>`,
`B<2>`, `B<3>`, `A`. The native plugin follows the order of the bases in
memory and prints `B<2>`, `B<3>`, `A`, `B<0>`, `B<1>` (last three are
the virtual bases).
<details><summary>Class layout of C</summary>
```
class C size(88):
+---
0 | +--- (base class B<2>)
0 | | {vbptr}
8 | | _a
9. | | _b (bitstart=3,nbits=6)
11 | | _c
| +---
15 | +--- (base class B<3>)
15 | | {vbptr}
23 | | _a
24. | | _b (bitstart=3,nbits=6)
26 | | _c
| +---
| <alignment member> (size=2)
32 | _x
36 | _y
38 | _z
| <alignment member> (size=1)
| <alignment member> (size=2)
+---
+--- (virtual base A)
40 | {vfptr}
48 | U _u
| <alignment member> (size=4)
+---
+--- (virtual base B<0>)
56 | {vbptr}
64 | _a
65. | _b (bitstart=3,nbits=6)
67 | _c
+---
+--- (virtual base B<1>)
71 | {vbptr}
79 | _a
80. | _b (bitstart=3,nbits=6)
82 | _c
+---
```
</details>
I split the tests for the plugins for better readability.
130 lines
2.9 KiB
Plaintext
130 lines
2.9 KiB
Plaintext
# REQUIRES: target-windows
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# Test UDT layout reconstruction
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# RUN: split-file %s %t
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# RUN: %build --compiler=clang-cl -o %t.exe -- %t/main.cpp
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# RUN: %lldb -f %t.exe -s %t/commands.input 2>&1 | FileCheck %s
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#--- main.cpp
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// this is from the DIA plugin (UdtLayoutTest.cpp)
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struct A {
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explicit A(int u) { _u._u3 = u; }
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A(const A &) = default;
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virtual ~A() = default;
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private:
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union U {
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char _u1;
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short _u2;
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int _u3;
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};
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A::U _u;
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};
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#pragma pack(push, 1)
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template <int I> struct B : public virtual A {
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B(char a, unsigned short b, int c) : A(a + b + c), _a(a), _b(b), _c(c) {}
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private:
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char _a;
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unsigned short : 3;
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unsigned short _b : 6;
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unsigned short : 4;
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int _c;
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};
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#pragma pack(pop)
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#pragma pack(push, 16)
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class C : private virtual B<0>, public virtual B<1>, private B<2>, public B<3> {
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public:
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C(char x, char y, char z)
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: A(x - y + z), B<0>(x, y, z), B<1>(x * 2, y * 2, z * 2),
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B<2>(x * 3, y * 3, z * 3), B<3>(x * 4, y * 4, z * 4), _x(x * 5),
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_y(y * 5), _z(z * 5) {}
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static int abc;
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private:
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int _x;
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short _y;
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char _z;
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};
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int C::abc = 123;
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#pragma pack(pop)
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class List {
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public:
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List() = default;
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List(List *p, List *n, C v) : Prev(p), Next(n), Value(v) {}
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private:
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List *Prev = nullptr;
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List *Next = nullptr;
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C Value{1, 2, 3};
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};
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int main() {
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List ls[16];
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return 0; // break here
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}
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#--- commands.input
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settings set target.max-children-depth 10
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br set -p "break here"
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run
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target variable
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frame variable
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quit
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# CHECK: (int) ::C::abc = 123
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# CHECK: (List[16]) ls = {
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# CHECK: [15] = {
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# CHECK-NEXT: Prev = nullptr
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# CHECK-NEXT: Next = nullptr
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# CHECK-NEXT: Value = {
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# CHECK-NEXT: B<2> = {
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# CHECK-NEXT: A = {
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# CHECK-NEXT: _u = (_u1 = '\x02', _u2 = 2, _u3 = 2)
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# CHECK-NEXT: }
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# CHECK-NEXT: _a = '\x03'
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# CHECK-NEXT: _b = 6
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# CHECK-NEXT: _c = 9
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# CHECK-NEXT: }
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# CHECK-NEXT: B<3> = {
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# CHECK-NEXT: A = {
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# CHECK-NEXT: _u = (_u1 = '\x02', _u2 = 2, _u3 = 2)
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# CHECK-NEXT: }
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# CHECK-NEXT: _a = '\x04'
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# CHECK-NEXT: _b = 8
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# CHECK-NEXT: _c = 12
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# CHECK-NEXT: }
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# CHECK-NEXT: A = {
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# CHECK-NEXT: _u = (_u1 = '\x02', _u2 = 2, _u3 = 2)
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# CHECK-NEXT: }
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# CHECK-NEXT: B<0> = {
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# CHECK-NEXT: A = {
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# CHECK-NEXT: _u = (_u1 = '\x02', _u2 = 2, _u3 = 2)
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# CHECK-NEXT: }
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# CHECK-NEXT: _a = '\x01'
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# CHECK-NEXT: _b = 2
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# CHECK-NEXT: _c = 3
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# CHECK-NEXT: }
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# CHECK-NEXT: B<1> = {
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# CHECK-NEXT: A = {
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# CHECK-NEXT: _u = (_u1 = '\x02', _u2 = 2, _u3 = 2)
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# CHECK-NEXT: }
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# CHECK-NEXT: _a = '\x02'
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# CHECK-NEXT: _b = 4
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# CHECK-NEXT: _c = 6
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# CHECK-NEXT: }
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# CHECK-NEXT: _x = 5
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# CHECK-NEXT: _y = 10
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# CHECK-NEXT: _z = '\x0f'
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# CHECK-NEXT: }
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# CHECK-NEXT: }
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# CHECK-NEXT: }
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