third_party_elfutils/tests/testfile-dwp.source

# Nonsensical program used to generate example DWARF package files with type
# units, location lists, range lists, and macros.

# = foobar.h =

struct Foo
{
  int a, b;
  int foo ();
};

struct Bar
{
  long a, b;
  long bar ();
};

#define FROB(x) ((x) ^ 0x2a2a2a2a)
#define FRY(x) ((x) * 0x100000001b3)

inline long
fibonacci (unsigned int n)
{
  if (n == 0)
    return 0;
  else
    {
      long a = 0;
      long b = 1;
      for (unsigned int i = 2; i < n; i++)
	{
	  long tmp = a + b;
	  a = b;
	  b = tmp;
	}
      return b;
    }
}

# = foo.cc =

#include "foobar.h"

#define ZERO() (1 - 1)

int
x_x (int x)
{
  for (int i = x; i > ZERO(); i--)
    x *= x;
  return x;
}

int
Foo::foo ()
{
  int x = a;
  if (a > b)
    x -= b;
  return FROB (x_x (x));
}

# = bar.cc =

#include "foobar.h"

#define ONE 1

long
Bar::bar ()
{
  if (a == b)
    return ONE;
  else
    return a > b ? b : a;
}

# = main.cc =

#include "foobar.h"

#define MAIN_ARGS int argc, char **argv

int
main(MAIN_ARGS)
{
  struct Foo myfoo { argc, FROB (argc) };
  struct Bar mybar { fibonacci (argc), FRY (argc) };
  return myfoo.foo() + mybar.bar();
}

# Built with GCC at commit 80048aa13a6b ("debug/111409 - don't generate COMDAT
# macro sections for split DWARF").
$ g++ -gdwarf-5 -gsplit-dwarf -fdebug-types-section -g3 -O2 foo.cc bar.cc main.cc -o testfile-dwp-5
# GNU dwp as of binutils 2.41 only supports DWARF 4.
$ llvm-dwp -e testfile-dwp-5 -o testfile-dwp-5.dwp

$ g++ -gdwarf-4 -gsplit-dwarf -fdebug-types-section -g3 -O2 foo.cc bar.cc main.cc -o testfile-dwp-4
$ dwp -e testfile-dwp-4

$ g++ -gdwarf-4 -gstrict-dwarf -gsplit-dwarf -fdebug-types-section -g3 -O2 foo.cc bar.cc main.cc -o testfile-dwp-4-strict
$ dwp -e testfile-dwp-4-strict