/** @file
  Sample UnitTest built for execution on a Host machine.
  This test case generates a buffer underflow that is caught by a sanitizer.

  Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/
#include <PiPei.h>
#include <Uefi.h>
#include <Library/UefiLib.h>
#include <Library/DebugLib.h>
#include <Library/UnitTestLib.h>
#include <Library/PrintLib.h>
#include <Library/MemoryAllocationLib.h>

#define UNIT_TEST_NAME     "Sample Unit Test Sanitize Buffer Underflow"
#define UNIT_TEST_VERSION  "0.1"

/**
  Sample unit test the performs a buffer underflow

  @param[in]  Context    [Optional] An optional parameter that enables:
                         1) test-case reuse with varied parameters and
                         2) test-case re-entry for Target tests that need a
                         reboot.  This parameter is a VOID* and it is the
                         responsibility of the test author to ensure that the
                         contents are well understood by all test cases that may
                         consume it.

  @retval  UNIT_TEST_PASSED             The Unit test has completed and the test
                                        case was successful.
  @retval  UNIT_TEST_ERROR_TEST_FAILED  A test case assertion has failed.
**/
UNIT_TEST_STATUS
EFIAPI
SanitizeBufferUnderflow (
  IN UNIT_TEST_CONTEXT  Context
  )
{
  UINT8  *Pointer;

  Pointer = (UINT8 *)AllocatePool (100);
  UT_ASSERT_NOT_NULL (Pointer);
  Pointer[-10] = 0;
  FreePool (Pointer);

  return UNIT_TEST_PASSED;
}

/**
  Initialize the unit test framework, suite, and unit tests for the
  sample unit tests and run the unit tests.

  @retval  EFI_SUCCESS           All test cases were dispatched.
  @retval  EFI_OUT_OF_RESOURCES  There are not enough resources available to
                                 initialize the unit tests.
**/
EFI_STATUS
EFIAPI
UefiTestMain (
  VOID
  )
{
  EFI_STATUS                  Status;
  UNIT_TEST_FRAMEWORK_HANDLE  Framework;
  UNIT_TEST_SUITE_HANDLE      SanitizeTests;

  Framework = NULL;

  DEBUG ((DEBUG_INFO, "%a v%a\n", UNIT_TEST_NAME, UNIT_TEST_VERSION));

  //
  // Start setting up the test framework for running the tests.
  //
  Status = InitUnitTestFramework (&Framework, UNIT_TEST_NAME, gEfiCallerBaseName, UNIT_TEST_VERSION);
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "Failed in InitUnitTestFramework. Status = %r\n", Status));
    goto EXIT;
  }

  //
  // Populate the Macro Tests with ASSERT() enabled
  //
  Status = CreateUnitTestSuite (&SanitizeTests, Framework, "Sanitize tests", "Sanitize tests", NULL, NULL);
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "Failed in CreateUnitTestSuite for SanitizeTests\n"));
    Status = EFI_OUT_OF_RESOURCES;
    goto EXIT;
  }

  AddTestCase (SanitizeTests, "Sanitize Buffer Underflow", "SanitizeBufferUnderflow", SanitizeBufferUnderflow, NULL, NULL, NULL);

  //
  // Execute the tests.
  //
  Status = RunAllTestSuites (Framework);

EXIT:
  if (Framework) {
    FreeUnitTestFramework (Framework);
  }

  return Status;
}

/**
  Standard POSIX C entry point for host based unit test execution.
**/
int
main (
  int   argc,
  char  *argv[]
  )
{
  return UefiTestMain ();
}
