/*
 * Copyright © 2012 Intel Corporation
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 * Author: Benjamin Segovia <benjamin.segovia@intel.com>
 */

#include "cl_kernel.h"
#include "cl_program.h"
#include "cl_device_id.h"
#include "cl_context.h"
#include "cl_alloc.h"
#include "cl_utils.h"
#include "cl_khr_icd.h"
#include "cl_gbe_loader.h"
#include "cl_cmrt.h"
#include "CL/cl.h"
#include "CL/cl_intel.h"
#include "CL/cl_ext.h"

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include <sys/stat.h>
#include <libgen.h>

static void
cl_program_release_sources(cl_program p)
{
  if (p->source) {
    cl_free(p->source);
    p->source = NULL;
  }
}

static void
cl_program_release_binary(cl_program p)
{
  if (p->binary) {
    cl_free(p->binary);
    p->binary = NULL;
  }
}

LOCAL void
cl_program_delete(cl_program p)
{
  uint32_t ref, i;

  if (p == NULL)
    return;

  /* We are not done with it yet */
  if ((ref = CL_OBJECT_DEC_REF(p)) > 1) return;

  /* Destroy the sources and binary if still allocated */
  cl_program_release_sources(p);
  cl_program_release_binary(p);

  /* Release the build options. */
  if (p->build_opts) {
    cl_free(p->build_opts);
    p->build_opts = NULL;
  }

  if (p->build_log) {
    free(p->build_log);
    p->build_log = NULL;
  }

#ifdef HAS_CMRT
  if (p->cmrt_program != NULL)
    cmrt_destroy_program(p);
  else
#endif
  {
    cl_free(p->bin);               /* Free the blob */
    for (i = 0; i < p->ker_n; ++i) /* Free the kernels */
      cl_kernel_delete(p->ker[i]);
    cl_free(p->ker);
  }

  if (p->global_data_ptr)
    cl_buffer_unreference(p->global_data);
  cl_free(p->global_data_ptr);

  /* Remove it from the list */
  cl_context_remove_program(p->ctx, p);

  /* Free the program as allocated by the compiler */
  if (p->opaque) {
    if (CompilerSupported())
      //For static variables release, gbeLoader may have been released, so
      //compiler_program_clean_llvm_resource and interp_program_delete may be NULL.
      if(compiler_program_clean_llvm_resource)
        compiler_program_clean_llvm_resource(p->opaque);
    if(interp_program_delete)
      interp_program_delete(p->opaque);
  }

  CL_OBJECT_DESTROY_BASE(p);
  cl_free(p);
}

#define BUILD_LOG_MAX_SIZE (1024*1024U)
LOCAL cl_program
cl_program_new(cl_context ctx)
{
  cl_program p = NULL;

  /* Allocate the structure */
  TRY_ALLOC_NO_ERR (p, CALLOC(struct _cl_program));
  CL_OBJECT_INIT_BASE(p, CL_OBJECT_PROGRAM_MAGIC);
  p->build_status = CL_BUILD_NONE;
  p->cmrt_program = NULL;
  p->build_log = calloc(BUILD_LOG_MAX_SIZE, sizeof(char));
  if (p->build_log)
    p->build_log_max_sz = BUILD_LOG_MAX_SIZE;

  /* The queue also belongs to its context */
  cl_context_add_program(ctx, p);

exit:
  return p;
error:
  cl_program_delete(p);
  goto exit;
}

LOCAL void
cl_program_add_ref(cl_program p)
{
  assert(p);
  CL_OBJECT_INC_REF(p);
}

static cl_int
cl_program_load_gen_program(cl_program p)
{
  cl_int err = CL_SUCCESS;
  uint32_t i;

  assert(p->opaque != NULL);
  p->ker_n = interp_program_get_kernel_num(p->opaque);

  /* Allocate the kernel array */
  TRY_ALLOC (p->ker, CALLOC_ARRAY(cl_kernel, p->ker_n));

  for (i = 0; i < p->ker_n; ++i) {
    const gbe_kernel opaque = interp_program_get_kernel(p->opaque, i);
    assert(opaque != NULL);
    TRY_ALLOC (p->ker[i], cl_kernel_new(p));
    cl_kernel_setup(p->ker[i], opaque);
  }

error:
  return err;
}

#define BINARY_HEADER_LENGTH 5

static const unsigned char binary_type_header[BHI_MAX][BINARY_HEADER_LENGTH]=  \
                                              {{'B','C', 0xC0, 0xDE},
                                               {1, 'B', 'C', 0xC0, 0xDE},
                                               {2, 'B', 'C', 0xC0, 0xDE},
                                               {1, 'G','E', 'N', 'C'},
                                               {'C','I', 'S', 'A'},
                                               };

LOCAL cl_bool headerCompare(const unsigned char *BufPtr, BINARY_HEADER_INDEX index)
{
  bool matched = true;
  int length = (index == BHI_SPIR || index == BHI_CMRT) ? BINARY_HEADER_LENGTH -1 :BINARY_HEADER_LENGTH;
  int i = 0;
  if(index == BHI_GEN_BINARY)
    i = 1;
  for (; i < length; ++i)
  {
    matched = matched && (BufPtr[i] == binary_type_header[index][i]);
  }
  if(index == BHI_GEN_BINARY && matched) {
    if(BufPtr[0] != binary_type_header[index][0]) {
      DEBUGP(DL_WARNING, "Beignet binary format have been changed, please generate binary again.\n");
      matched = false;
    }
  }
  return matched;
}

#define isSPIR(BufPtr)      headerCompare(BufPtr, BHI_SPIR)
#define isLLVM_C_O(BufPtr)  headerCompare(BufPtr, BHI_COMPIRED_OBJECT)
#define isLLVM_LIB(BufPtr)  headerCompare(BufPtr, BHI_LIBRARY)
#define isGenBinary(BufPtr) headerCompare(BufPtr, BHI_GEN_BINARY)
#define isCMRT(BufPtr)      headerCompare(BufPtr, BHI_CMRT)

static cl_int get_program_global_data(cl_program prog) {
//OpenCL 1.2 would never call this function, and OpenCL 2.0 alwasy HAS_BO_SET_SOFTPIN.
#ifdef HAS_BO_SET_SOFTPIN
  cl_buffer_mgr bufmgr = NULL;
  bufmgr = cl_context_get_bufmgr(prog->ctx);
  assert(bufmgr);
  size_t const_size = interp_program_get_global_constant_size(prog->opaque);
  if (const_size == 0) return CL_SUCCESS;

  int page_size = getpagesize();
  size_t alignedSz = ALIGN(const_size, page_size);
  char * p = (char*)cl_aligned_malloc(alignedSz, page_size);
  prog->global_data_ptr = p;
  interp_program_get_global_constant_data(prog->opaque, (char*)p);

  prog->global_data = cl_buffer_alloc_userptr(bufmgr, "program global data", p, alignedSz, 0);
  cl_buffer_set_softpin_offset(prog->global_data, (size_t)p);
  cl_buffer_set_bo_use_full_range(prog->global_data, 1);

  uint32_t reloc_count = interp_program_get_global_reloc_count(prog->opaque);
  if (reloc_count > 0) {
    uint32_t x;
    struct RelocEntry {int refOffset; int defOffset;};
    char *temp = (char*) malloc(reloc_count *sizeof(int)*2);
    interp_program_get_global_reloc_table(prog->opaque, temp);
    for (x = 0; x < reloc_count; x++) {
      int ref_offset = ((struct RelocEntry *)temp)[x].refOffset;
      *(uint64_t*)&(p[ref_offset]) = ((struct RelocEntry *)temp)[x].defOffset + (uint64_t)p;
    }
    free(temp);
  }
#if 0
  int x = 0;
  for (x = 0; x < const_size; x++) {
    printf("offset %d data: %x\n", x, (unsigned)p[x]);
  }
#endif
#endif
  return CL_SUCCESS;
}

LOCAL size_t cl_program_get_global_variable_size(cl_program prog) {
  return interp_program_get_global_constant_size(prog->opaque);
}

LOCAL cl_program
cl_program_create_from_binary(cl_context             ctx,
                              cl_uint                num_devices,
                              const cl_device_id *   devices,
                              const size_t *         lengths,
                              const unsigned char ** binaries,
                              cl_int *               binary_status,
                              cl_int *               errcode_ret)
{
  cl_program program = NULL;
  cl_int err = CL_SUCCESS;

  assert(ctx);
  INVALID_DEVICE_IF (num_devices != 1);
  INVALID_DEVICE_IF (devices == NULL);
  INVALID_DEVICE_IF (devices[0] != ctx->devices[0]);
  INVALID_VALUE_IF (binaries == NULL);
  INVALID_VALUE_IF (lengths == NULL);

  if (binaries[0] == NULL) {
    err = CL_INVALID_VALUE;
    if (binary_status)
      binary_status[0] = CL_INVALID_VALUE;
    goto error;
  }

  //need at least 4 bytes to check the binary type.
  if (lengths[0] == 0 || lengths[0] < 4) {
    err = CL_INVALID_VALUE;
    if (binary_status)
      binary_status[0] = CL_INVALID_VALUE;
    goto error;
  }

  program = cl_program_new(ctx);
  if (UNLIKELY(program == NULL)) {
      err = CL_OUT_OF_HOST_MEMORY;
      goto error;
  }

  TRY_ALLOC(program->binary, cl_calloc(lengths[0], sizeof(char)));
  memcpy(program->binary, binaries[0], lengths[0]);
  program->binary_sz = lengths[0];
  program->source_type = FROM_BINARY;

  if (isCMRT((unsigned char*)program->binary)) {
    program->source_type = FROM_CMRT;
  }else if(isSPIR((unsigned char*)program->binary)) {
    char* typed_binary;
    TRY_ALLOC(typed_binary, cl_calloc(lengths[0]+1, sizeof(char)));
    memcpy(typed_binary+1, binaries[0], lengths[0]);
    *typed_binary = 1;
    program->opaque = compiler_program_new_from_llvm_binary(program->ctx->devices[0]->device_id, typed_binary, program->binary_sz+1);
    cl_free(typed_binary);
    if (UNLIKELY(program->opaque == NULL)) {
      err = CL_INVALID_PROGRAM;
      goto error;
    }

    program->source_type = FROM_LLVM_SPIR;
    program->binary_type = CL_PROGRAM_BINARY_TYPE_INTERMEDIATE;
  }else if(isLLVM_C_O((unsigned char*)program->binary) || isLLVM_LIB((unsigned char*)program->binary)) {
    if(*program->binary == BHI_COMPIRED_OBJECT){
      program->binary_type = CL_PROGRAM_BINARY_TYPE_COMPILED_OBJECT;
    }else if(*program->binary == BHI_LIBRARY){
      program->binary_type = CL_PROGRAM_BINARY_TYPE_LIBRARY;
    }else{
      err= CL_INVALID_BINARY;
      goto error;
    }
    program->opaque = compiler_program_new_from_llvm_binary(program->ctx->devices[0]->device_id, program->binary, program->binary_sz);

    if (UNLIKELY(program->opaque == NULL)) {
      err = CL_INVALID_PROGRAM;
      goto error;
    }
    program->source_type = FROM_LLVM;
  }
  else if (isGenBinary((unsigned char*)program->binary)) {
    program->opaque = interp_program_new_from_binary(program->ctx->devices[0]->device_id, program->binary, program->binary_sz);
    if (UNLIKELY(program->opaque == NULL)) {
      DEBUGP(DL_ERROR, "Incompatible binary, please delete the binary and generate again.");
      err = CL_INVALID_PROGRAM;
      goto error;
    }

    /* Create all the kernels */
    TRY (cl_program_load_gen_program, program);
    program->binary_type = CL_PROGRAM_BINARY_TYPE_EXECUTABLE;
  }
  else {
    err= CL_INVALID_BINARY;
    goto error;
  }

  if (binary_status)
    binary_status[0] = CL_SUCCESS;

exit:
  if (errcode_ret)
    *errcode_ret = err;
  return program;
error:
  cl_program_delete(program);
  program = NULL;
  goto exit;

  return CL_SUCCESS;
}

LOCAL cl_program
cl_program_create_with_built_in_kernles(cl_context     ctx,
                                  cl_uint              num_devices,
                                  const cl_device_id * devices,
                                  const char *         kernel_names,
                                  cl_int *             errcode_ret)
{
  cl_int err = CL_SUCCESS;
  cl_program built_in_prgs = NULL;

  assert(ctx);
  INVALID_DEVICE_IF (num_devices != 1);
  INVALID_DEVICE_IF (devices == NULL);
  INVALID_DEVICE_IF (devices[0] != ctx->devices[0]);

  cl_int binary_status = CL_SUCCESS;
  extern char cl_internal_built_in_kernel_str[];
  extern size_t cl_internal_built_in_kernel_str_size;
  char* p_built_in_kernel_str =cl_internal_built_in_kernel_str;

  built_in_prgs = cl_program_create_from_binary(ctx, 1,
                                                &ctx->devices[0],
                                                (size_t*)&cl_internal_built_in_kernel_str_size,
                                                (const unsigned char **)&p_built_in_kernel_str,
                                                &binary_status, &err);
  if (!built_in_prgs)
    return NULL;

  err = cl_program_build(built_in_prgs, NULL);
  if (err != CL_SUCCESS)
    return NULL;

  built_in_prgs->is_built = 1;

exit:
  if (errcode_ret)
    *errcode_ret = err;
  return built_in_prgs;
error:
  goto exit;

  return CL_SUCCESS;
}

LOCAL cl_program
cl_program_create_from_llvm(cl_context ctx,
                            cl_uint num_devices,
                            const cl_device_id *devices,
                            const char *file_name,
                            cl_int *errcode_ret)
{
  cl_program program = NULL;
  cl_int err = CL_SUCCESS;

  assert(ctx);
  INVALID_DEVICE_IF (num_devices != 1);
  INVALID_DEVICE_IF (devices == NULL);
  INVALID_DEVICE_IF (devices[0] != ctx->devices[0]);
  INVALID_VALUE_IF (file_name == NULL);

  program = cl_program_new(ctx);
  if (UNLIKELY(program == NULL)) {
      err = CL_OUT_OF_HOST_MEMORY;
      goto error;
  }

  program->opaque = compiler_program_new_from_llvm_file(ctx->devices[0]->device_id, file_name, program->build_log_max_sz, program->build_log, &program->build_log_sz);
  if (UNLIKELY(program->opaque == NULL)) {
    err = CL_INVALID_PROGRAM;
    goto error;
  }

  /* Create all the kernels */
  TRY (cl_program_load_gen_program, program);
  program->source_type = FROM_LLVM;

exit:
  if (errcode_ret)
    *errcode_ret = err;
  return program;
error:
  cl_program_delete(program);
  program = NULL;
  goto exit;
}

LOCAL cl_program
cl_program_create_from_source(cl_context ctx,
                              cl_uint count,
                              const char **strings,
                              const size_t *lengths,
                              cl_int *errcode_ret)

{
  cl_program program = NULL;
  cl_int err = CL_SUCCESS;
  cl_uint i;
  int32_t * lens = NULL;
  int32_t len_total = 0;
  assert(ctx);
  char * p = NULL;
  // the real compilation step will be done at build time since we do not have
  // yet the compilation options
  program = cl_program_new(ctx);
  if (UNLIKELY(program == NULL)) {
      err = CL_OUT_OF_HOST_MEMORY;
      goto error;
  }

  TRY_ALLOC (lens, cl_calloc(count, sizeof(int32_t)));
  for (i = 0; i < (int) count; ++i) {
    size_t len;
    if (lengths == NULL || lengths[i] == 0)
      len = strlen(strings[i]);
    else
      len = lengths[i];
    lens[i] = len;
    len_total += len;
  }
  TRY_ALLOC(program->source, cl_calloc(len_total+1, sizeof(char)));
  p = program->source;
  for (i = 0; i < (int) count; ++i) {
    memcpy(p, strings[i], lens[i]);
    p += lens[i];
  }
  *p = '\0';

  program->source_type = FROM_SOURCE;
  program->binary_type = CL_PROGRAM_BINARY_TYPE_NONE;

exit:
  cl_free(lens);
  lens = NULL;
  if (errcode_ret)
    *errcode_ret = err;
  return program;
error:
  cl_program_delete(program);
  program = NULL;
  goto exit;
}

/* Before we do the real work, we need to check whether our platform
   cl version can meet -cl-std= */
static int check_cl_version_option(cl_program p, const char* options) {
  const char* s = NULL;
  int ver1 = 0;
  int ver2 = 0;
  char version_str[64] = {0};

  if (options && (s = strstr(options, "-cl-std="))) {

    if (s + strlen("-cl-std=CLX.X") > options + strlen(options)) {
      return 0;
    }

    if (s[8] != 'C' || s[9] != 'L' || s[10] > '9' || s[10] < '0' || s[11] != '.'
        || s[12] > '9' || s[12] < '0') {
      return 0;
    }

    ver1 = (s[10] - '0') * 10 + (s[12] - '0');

    if (cl_get_device_info(p->ctx->devices[0], CL_DEVICE_OPENCL_C_VERSION, sizeof(version_str),
                                  version_str, NULL) != CL_SUCCESS)
      return 0;

    assert(strstr(version_str, "OpenCL") && version_str[0] == 'O');
    ver2 = (version_str[9] - '0') * 10 + (version_str[11] - '0');

    if (ver2 < ver1)
      return 0;

    return 1;
  }

  return 1;
}

LOCAL cl_int
cl_program_build(cl_program p, const char *options)
{
  cl_int err = CL_SUCCESS;
  int i = 0;
  int copyed = 0;

  if (CL_OBJECT_GET_REF(p) > 1) {
    err = CL_INVALID_OPERATION;
    goto error;
  }

#if HAS_CMRT
  if (p->source_type == FROM_CMRT) {
    //only here we begins to invoke cmrt
    //break spec to return other errors such as CL_DEVICE_NOT_FOUND
    err = cmrt_build_program(p, options);
    if (err == CL_SUCCESS) {
      p->build_status = CL_BUILD_SUCCESS;
      p->binary_type = CL_PROGRAM_BINARY_TYPE_EXECUTABLE;
      return CL_SUCCESS;
    } else
      goto error;
  }
#endif

  if (!check_cl_version_option(p, options)) {
    err = CL_BUILD_PROGRAM_FAILURE;
    goto error;
  }
  if (options) {
    if(p->build_opts == NULL || strcmp(options, p->build_opts) != 0) {
      if(p->build_opts) {
        cl_free(p->build_opts);
        p->build_opts = NULL;
      }
      TRY_ALLOC (p->build_opts, cl_calloc(strlen(options) + 1, sizeof(char)));
      memcpy(p->build_opts, options, strlen(options));
    }
  }

  if (options == NULL && p->build_opts) {
    cl_free(p->build_opts);
    p->build_opts = NULL;
  }

  if (p->source_type == FROM_SOURCE) {
    if (!CompilerSupported()) {
      err = CL_COMPILER_NOT_AVAILABLE;
      goto error;
    }

    p->opaque = compiler_program_new_from_source(p->ctx->devices[0]->device_id, p->source, p->build_log_max_sz, options, p->build_log, &p->build_log_sz);
    if (UNLIKELY(p->opaque == NULL)) {
      if (p->build_log_sz > 0 && strstr(p->build_log, "error: error reading 'options'"))
        err = CL_INVALID_BUILD_OPTIONS;
      else
        err = CL_BUILD_PROGRAM_FAILURE;
      goto error;
    }

    /* Create all the kernels */
    TRY (cl_program_load_gen_program, p);
  } else if (p->source_type == FROM_LLVM || p->source_type == FROM_LLVM_SPIR) {
    if (!CompilerSupported()) {
      err = CL_COMPILER_NOT_AVAILABLE;
      goto error;
    }

    compiler_program_build_from_llvm(p->opaque, p->build_log_max_sz, p->build_log, &p->build_log_sz, options);
    if (UNLIKELY(p->opaque == NULL)) {
      if (p->build_log_sz > 0 && strstr(p->build_log, "error: error reading 'options'"))
        err = CL_INVALID_BUILD_OPTIONS;
      else
        err = CL_BUILD_PROGRAM_FAILURE;
      goto error;
    }
    /* Create all the kernels */
    TRY (cl_program_load_gen_program, p);
  } else if (p->source_type == FROM_BINARY && p->binary_type != CL_PROGRAM_BINARY_TYPE_EXECUTABLE) {
    p->opaque = interp_program_new_from_binary(p->ctx->devices[0]->device_id, p->binary, p->binary_sz);
    if (UNLIKELY(p->opaque == NULL)) {
      err = CL_BUILD_PROGRAM_FAILURE;
      goto error;
    }

    /* Create all the kernels */
    TRY (cl_program_load_gen_program, p);
  }
  p->binary_type = CL_PROGRAM_BINARY_TYPE_EXECUTABLE;

  for (i = 0; i < p->ker_n; i ++) {
    const gbe_kernel opaque = interp_program_get_kernel(p->opaque, i);
    p->bin_sz += interp_kernel_get_code_size(opaque);
  }

  TRY_ALLOC (p->bin, cl_calloc(p->bin_sz, sizeof(char)));
  for (i = 0; i < p->ker_n; i ++) {
    const gbe_kernel opaque = interp_program_get_kernel(p->opaque, i);
    size_t sz = interp_kernel_get_code_size(opaque);

    memcpy(p->bin + copyed, interp_kernel_get_code(opaque), sz);
    copyed += sz;
  }
  uint32_t ocl_version = interp_kernel_get_ocl_version(interp_program_get_kernel(p->opaque, 0));
  if (ocl_version >= 200 && (err = get_program_global_data(p)) != CL_SUCCESS)
    goto error;

  p->is_built = 1;
  p->build_status = CL_BUILD_SUCCESS;
  return CL_SUCCESS;

error:
  p->build_status = CL_BUILD_ERROR;
  return err;
}

cl_program
cl_program_link(cl_context            context,
                cl_uint               num_input_programs,
                const cl_program *    input_programs,
                const char *          options,
                cl_int*               errcode_ret)
{
  cl_program p = NULL;
  cl_int err = CL_SUCCESS;
  cl_int i = 0;
  int copyed = 0;
  cl_bool ret = 0;
  int avialable_program = 0;
  //Although we don't use options, but still need check options
  if(!compiler_program_check_opt(options)) {
    err = CL_INVALID_LINKER_OPTIONS;
    goto error;
  }
  const char kernel_arg_option[] = "-cl-kernel-arg-info";
  cl_bool option_exist = CL_TRUE;
  for(i = 0; i < num_input_programs; i++) {
    //num_input_programs >0 and input_programs MUST not NULL, so compare with input_programs[0] directly.
    if(input_programs[i]->binary_type == CL_PROGRAM_BINARY_TYPE_LIBRARY ||
       input_programs[i]->binary_type == CL_PROGRAM_BINARY_TYPE_COMPILED_OBJECT ||
       input_programs[i]->binary_type == CL_PROGRAM_BINARY_TYPE_INTERMEDIATE) {
      avialable_program++;
    }
    if(input_programs[i]->build_opts == NULL || strstr(input_programs[i]->build_opts, kernel_arg_option) == NULL ) {
      option_exist = CL_FALSE;
    }
  }

  //None of program contain a compilerd binary or library.
  if(avialable_program == 0) {
    goto done;
  }

  //Must all of program contain a compilerd binary or library.
  if(avialable_program < num_input_programs) {
    err = CL_INVALID_OPERATION;
    goto error;
  }

  p = cl_program_new(context);
  if (UNLIKELY(p == NULL)) {
      err = CL_OUT_OF_HOST_MEMORY;
      goto error;
  }

  if(option_exist) {
      TRY_ALLOC (p->build_opts, cl_calloc(strlen(kernel_arg_option) + 1, sizeof(char)));
      memcpy(p->build_opts, kernel_arg_option, strlen(kernel_arg_option));
  }

  if (!check_cl_version_option(p, options)) {
    err = CL_BUILD_PROGRAM_FAILURE;
    goto error;
  }

  p->opaque = compiler_program_new_gen_program(context->devices[0]->device_id, NULL, NULL, NULL);
  for(i = 0; i < num_input_programs; i++) {
    // if program create with llvm binary, need deserilize first to get module.
    if(input_programs[i])
      ret = compiler_program_link_program(p->opaque, input_programs[i]->opaque,
                                          p->build_log_max_sz, p->build_log, &p->build_log_sz);
    if (UNLIKELY(ret)) {
      err = CL_LINK_PROGRAM_FAILURE;
      goto error;
    }
  }

  if(options && strstr(options, "-create-library")){
    p->binary_type = CL_PROGRAM_BINARY_TYPE_LIBRARY;
    goto done;
  }else{
    p->binary_type = CL_PROGRAM_BINARY_TYPE_EXECUTABLE;
  }

  compiler_program_build_from_llvm(p->opaque, p->build_log_max_sz, p->build_log, &p->build_log_sz, options);

  /* Create all the kernels */
  TRY (cl_program_load_gen_program, p);

  for (i = 0; i < p->ker_n; i ++) {
    const gbe_kernel opaque = interp_program_get_kernel(p->opaque, i);
    p->bin_sz += interp_kernel_get_code_size(opaque);
  }

  TRY_ALLOC (p->bin, cl_calloc(p->bin_sz, sizeof(char)));
  for (i = 0; i < p->ker_n; i ++) {
    const gbe_kernel opaque = interp_program_get_kernel(p->opaque, i);
    size_t sz = interp_kernel_get_code_size(opaque);

    memcpy(p->bin + copyed, interp_kernel_get_code(opaque), sz);
    copyed += sz;
  }

  uint32_t ocl_version = interp_kernel_get_ocl_version(interp_program_get_kernel(p->opaque, 0));
  if (ocl_version >= 200 && (err = get_program_global_data(p)) != CL_SUCCESS)
    goto error;

done:
  if(p) p->is_built = 1;
  if(p) p->build_status = CL_BUILD_SUCCESS;
  if (errcode_ret)
    *errcode_ret = err;
  return p;

error:
  if(p) p->build_status = CL_BUILD_ERROR;
  if (errcode_ret)
    *errcode_ret = err;
  return p;
}

#define FILE_PATH_LENGTH  1024
LOCAL cl_int
cl_program_compile(cl_program            p,
                   cl_uint               num_input_headers,
                   const cl_program *    input_headers,
                   const char **         header_include_names,
                   const char*           options)
{
  cl_int err = CL_SUCCESS;
  int i = 0;

  if (CL_OBJECT_GET_REF(p) > 1) {
    err = CL_INVALID_OPERATION;
    goto error;
  }

  if (!check_cl_version_option(p, options)) {
    err = CL_BUILD_PROGRAM_FAILURE;
    goto error;
  }

  if (options) {
    if(p->build_opts == NULL || strcmp(options, p->build_opts) != 0) {
      if(p->build_opts) {
        cl_free(p->build_opts);
        p->build_opts = NULL;
      }
      TRY_ALLOC (p->build_opts, cl_calloc(strlen(options) + 1, sizeof(char)));
      memcpy(p->build_opts, options, strlen(options));
    }
  }

  if (options == NULL && p->build_opts) {
    cl_free(p->build_opts);
    p->build_opts = NULL;
  }

#if defined(__ANDROID__)
  char temp_header_template[]= "/data/local/tmp/beignet.XXXXXX";
#else
  char temp_header_template[]= "/tmp/beignet.XXXXXX";
#endif

  char* temp_header_path = mkdtemp(temp_header_template);

  if (p->source_type == FROM_SOURCE) {

    if (!CompilerSupported()) {
      err = CL_COMPILER_NOT_AVAILABLE;
      goto error;
    }

    //write the headers to /tmp/beignet.XXXXXX for include.
    for (i = 0; i < num_input_headers; i++) {
      if(header_include_names[i] == NULL || input_headers[i] == NULL)
        continue;
      char temp_path[FILE_PATH_LENGTH]="";
      strncat(temp_path, temp_header_path, strlen(temp_header_path));
      strncat(temp_path, "/", 1);
      strncat(temp_path, header_include_names[i], strlen(header_include_names[i]));
      if(strlen(temp_path) >= FILE_PATH_LENGTH - 1 ) {
        err = CL_COMPILE_PROGRAM_FAILURE;
        goto error;
      }
      temp_path[strlen(temp_path)+1] = '\0';
      char* dirc = strdup(temp_path);
      char* dir = dirname(dirc);
      mkdir(dir, 0755);
      if(access(dir, R_OK|W_OK) != 0){
        err = CL_COMPILE_PROGRAM_FAILURE;
        goto error;
      }
      free(dirc);

      FILE* pfile = fopen(temp_path, "wb");
      if(pfile){
        fwrite(input_headers[i]->source, strlen(input_headers[i]->source), 1, pfile);
        fclose(pfile);
      }else{
        err = CL_COMPILE_PROGRAM_FAILURE;
        goto error;
      }
    }

    p->opaque = compiler_program_compile_from_source(p->ctx->devices[0]->device_id, p->source, temp_header_path,
        p->build_log_max_sz, options, p->build_log, &p->build_log_sz);

    char rm_path[255]="rm ";
    strncat(rm_path, temp_header_path, strlen(temp_header_path));
    strncat(rm_path, " -rf", 4);
    int temp = system(rm_path);

    if(temp){
      assert(0);
    }

    if (UNLIKELY(p->opaque == NULL)) {
      if (p->build_log_sz > 0 && strstr(p->build_log, "error: error reading 'options'"))
        err = CL_INVALID_COMPILER_OPTIONS;
      else
        err = CL_COMPILE_PROGRAM_FAILURE;
      goto error;
    }

    /* Create all the kernels */
    p->binary_type = CL_PROGRAM_BINARY_TYPE_COMPILED_OBJECT;
  }else if(p->source_type == FROM_BINARY){
    err = CL_INVALID_OPERATION;
    return err;
  }

  p->is_built = 1;
  p->build_status = CL_BUILD_SUCCESS;
  return CL_SUCCESS;

error:
  p->build_status = CL_BUILD_ERROR;
  return err;
}

LOCAL cl_kernel
cl_program_create_kernel(cl_program p, const char *name, cl_int *errcode_ret)
{
  cl_kernel from = NULL, to = NULL;
  cl_int err = CL_SUCCESS;
  uint32_t i = 0;

#ifdef HAS_CMRT
  if (p->cmrt_program != NULL) {
    void* cmrt_kernel = cmrt_create_kernel(p, name);
    if (cmrt_kernel != NULL) {
      to = cl_kernel_new(p);
      to->cmrt_kernel = cmrt_kernel;
      goto exit;
    } else {
      err = CL_INVALID_KERNEL_NAME;
      goto error;
    }
  }
#endif

  /* Find the program first */
  for (i = 0; i < p->ker_n; ++i) {
    assert(p->ker[i]);
    const char *ker_name = cl_kernel_get_name(p->ker[i]);
    if (ker_name != NULL && strcmp(ker_name, name) == 0) {
      from = p->ker[i];
      break;
    }
  }

  /* We were not able to find this named kernel */
  if (UNLIKELY(from == NULL)) {
    err = CL_INVALID_KERNEL_NAME;
    goto error;
  }

  TRY_ALLOC(to, cl_kernel_dup(from));

exit:
  if (errcode_ret)
    *errcode_ret = err;
  return to;
error:
  cl_kernel_delete(to);
  to = NULL;
  goto exit;
}

LOCAL cl_int
cl_program_create_kernels_in_program(cl_program p, cl_kernel* ker)
{
  int i = 0;

  if(ker == NULL)
    return CL_SUCCESS;

  for (i = 0; i < p->ker_n; ++i) {
    TRY_ALLOC_NO_ERR(ker[i], cl_kernel_dup(p->ker[i]));
  }

  return CL_SUCCESS;

error:
  do {
    cl_kernel_delete(ker[i]);
    ker[i--] = NULL;
  } while(i > 0);

  return CL_OUT_OF_HOST_MEMORY;
}

LOCAL void
cl_program_get_kernel_names(cl_program p, size_t size, char *names, size_t *size_ret)
{
  int i = 0;
  const char *ker_name = NULL;
  size_t len = 0;
  if(size_ret) *size_ret = 0;

  if(p->ker == NULL) {
    return;
  }

  ker_name = cl_kernel_get_name(p->ker[0]);
  if (ker_name != NULL)
    len = strlen(ker_name);
  else
    len = 0;
  if(names && ker_name) {
    strncpy(names, ker_name, size - 1);
    names[size - 1] = '\0';
    if(size < len - 1) {
      if(size_ret) *size_ret = size;
      return;
    }
    size = size - len - 1;  //sub \0
  }
  if(size_ret) *size_ret = len + 1;  //add NULL

  for (i = 1; i < p->ker_n; ++i) {
    ker_name = cl_kernel_get_name(p->ker[i]);
    if (ker_name != NULL)
      len = strlen(ker_name);
    else
      len = 0;
    if(names && ker_name) {
      strncat(names, ";", size);
      if(size >= 1)
        strncat(names, ker_name, size - 1);
      if(size < len + 1) {
        if(size_ret) *size_ret = size;
        break;
      }
      size = size - len - 1;
    }
    if(size_ret) *size_ret += len + 1; //add ';'
  }
}