TheRock/debug-tools/rocgdb/source/gdb/testsuite/gdb.rocm/alu-exceptions.cpp

/* Copyright 2023-2024 Free Software Foundation, Inc.
   Copyright (C) 2023-2024 Advanced Micro Devices, Inc. All rights reserved.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <hip/hip_runtime.h>
#include <iostream>
#include <limits>
#include <cstdlib>

/* The debugger sets a breakpoint on this function and uses an inferior
   call to enable ALU exceptions before each kernel launches.  optnone
   implies noinline (so the breakpoint reliably fires at each call site)
   and keeps the body opaque to the optimizer, so IPO cannot prove the
   call away and dead-strip the function.  */

__device__ __attribute__ ((optnone)) void
enable_alu_exceptions ()
{
}

__global__ void
raise_invalid ()
{
  enable_alu_exceptions ();
  volatile float a = -1;
  volatile float b = sqrt (a); /* Break here for invalid.  */
}

__global__ void
raise_denorm ()
{
  enable_alu_exceptions ();
  volatile float inp = std::numeric_limits<float>::denorm_min ();
  volatile float b = inp * inp; /* Break here for denorm.  */
}

__global__ void
raise_float_div0 ()
{
  enable_alu_exceptions ();
  volatile float a = 1, b = 0;
  volatile float c = a / b; /* Break here for float_div0.  */
}

__global__ void
raise_overflow ()
{
  enable_alu_exceptions ();
  volatile float max = std::numeric_limits<float>::max ();
  volatile float b = max * 2.0f; /* Break here for overflow.  */
}

__global__ void
raise_underflow ()
{
  enable_alu_exceptions ();
  volatile float min = std::numeric_limits<float>::min ();
  volatile float c = min * min; /* Break here for underflow.  */
}

__global__ void
raise_inexact ()
{
  enable_alu_exceptions ();
  volatile float f = 1.1f;
  volatile float r = f * f; /* Break here for inexact.  */
}

__global__ void
raise_int_div0 ()
{
  enable_alu_exceptions ();
  volatile int a = 1, b = 0;
  volatile int c = a / b; /* Break here for int_div0.  */
}

int
main (int argc, char **argv)
{
  if (argc != 2)
    {
      std::cerr
	<< "Usage: " << argv[0]
	<< (" invalid|denorm|float_div0|overflow|underflow|inexact|"
	    "int_div0") << std::endl;
      return EXIT_FAILURE;
    }

  const std::string test (argv[1]);
  if (test == "invalid")
    raise_invalid<<<1, 1>>> ();
  else if (test == "denorm")
    raise_denorm<<<1, 1>>> ();
  else if (test == "float_div0")
    raise_float_div0<<<1, 1>>> ();
  else if (test == "overflow")
    raise_overflow<<<1, 1>>> ();
  else if (test == "underflow")
    raise_underflow<<<1, 1>>> ();
  else if (test == "inexact")
    raise_inexact<<<1, 1>>> ();
  else if (test == "int_div0")
    raise_int_div0<<<1, 1>>> ();
  else
    {
      std::cerr << "Unsupported test " << test << std::endl;
      return EXIT_FAILURE;
    }

  hipError_t err = hipDeviceSynchronize ();
  if (err == hipErrorLaunchFailure)
    {
      /* Depending on the system configuration, the HIP runtime might or might
	 not call abort(3) when it receives the GPU error.  Make sure to call
	 it ourself so the testcase can match the SIGABRT.  */
      abort ();
    }

  return (err == hipSuccess) ? EXIT_SUCCESS : EXIT_FAILURE;
}