File: thunk-mangling.cpp

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (31 lines) | stat: -rw-r--r-- 833 bytes parent folder | download | duplicates (12)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
// Check that virtual thunks are unaffected by the relative ABI.
// The offset of thunks is mangled into the symbol name, which could result in
// linking errors for binaries that want to look for symbols in SOs made with
// this ABI.
// Running that linked binary still won't work since we're using conflicting
// ABIs, but we should still be able to link.

// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -S -o - -emit-llvm | FileCheck %s

// This would be normally n24 (3 ptr widths) but is 12 since the vtable is
// entierely made of i32s now.
// CHECK: _ZTv0_n12_N7Derived1fEi

class Base {
public:
  virtual int f(int x);

private:
  long x;
};

class Derived : public virtual Base {
public:
  virtual int f(int x);

private:
  long y;
};

int Base::f(int x) { return x + 1; }
int Derived::f(int x) { return x + 2; }