/**********************************************************************
Copyright ©2013 Advanced Micro Devices, Inc. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted
provided that the following conditions are met:

<95>    Redistributions of source code must retain the above copyright notice, this list of
conditions and the following disclaimer.
<95>    Redistributions in binary form must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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#include "util/hsa_rsrc_factory.h"

#include <cxxabi.h>
#include <dlfcn.h>
#include <fcntl.h>
#include <hsa.h>
#include <hsa_ext_amd.h>
#include <hsa_ext_finalize.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include <atomic>
#include <cassert>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>

namespace rocprofiler {
namespace util {

// Demangle C++ symbol name
static const char* cpp_demangle(const char* symname) {
  size_t size = 0;
  int status;
  const char* ret = abi::__cxa_demangle(symname, NULL, &size, &status);
  return (ret != 0) ? ret : strdup(symname);
}

// Callback function to get available in the system agents
hsa_status_t HsaRsrcFactory::GetHsaAgentsCallback(hsa_agent_t agent, void* data) {
  hsa_status_t status = HSA_STATUS_ERROR;
  HsaRsrcFactory* hsa_rsrc = reinterpret_cast<HsaRsrcFactory*>(data);
  const AgentInfo* agent_info = hsa_rsrc->AddAgentInfo(agent);
  if (agent_info != NULL) status = HSA_STATUS_SUCCESS;
  return status;
}

// This function checks to see if the provided
// pool has the HSA_AMD_SEGMENT_GLOBAL property. If the kern_arg flag is true,
// the function adds an additional requirement that the pool have the
// HSA_AMD_MEMORY_POOL_GLOBAL_FLAG_KERNARG_INIT property. If kern_arg is false,
// pools must NOT have this property.
// Upon finding a pool that meets these conditions, HSA_STATUS_INFO_BREAK is
// returned. HSA_STATUS_SUCCESS is returned if no errors were encountered, but
// no pool was found meeting the requirements. If an error is encountered, we
// return that error.
static hsa_status_t FindGlobalPool(hsa_amd_memory_pool_t pool, void* data, bool kern_arg) {
  hsa_status_t err;
  hsa_amd_segment_t segment;
  uint32_t flag;

  if (nullptr == data) {
    return HSA_STATUS_ERROR_INVALID_ARGUMENT;
  }

  err = HsaRsrcFactory::HsaApi()->hsa_amd_memory_pool_get_info(pool, HSA_AMD_MEMORY_POOL_INFO_SEGMENT, &segment);
  CHECK_STATUS("hsa_amd_memory_pool_get_info", err);
  if (HSA_AMD_SEGMENT_GLOBAL != segment) {
    return HSA_STATUS_SUCCESS;
  }

  err = HsaRsrcFactory::HsaApi()->hsa_amd_memory_pool_get_info(pool, HSA_AMD_MEMORY_POOL_INFO_GLOBAL_FLAGS, &flag);
  CHECK_STATUS("hsa_amd_memory_pool_get_info", err);

  uint32_t karg_st = flag & HSA_AMD_MEMORY_POOL_GLOBAL_FLAG_KERNARG_INIT;

  if ((karg_st == 0 && kern_arg) || (karg_st != 0 && !kern_arg)) {
    return HSA_STATUS_SUCCESS;
  }

  *(reinterpret_cast<hsa_amd_memory_pool_t*>(data)) = pool;
  return HSA_STATUS_INFO_BREAK;
}

// This is the call-back function for hsa_amd_agent_iterate_memory_pools() that
// finds a pool with the properties of HSA_AMD_SEGMENT_GLOBAL and that is NOT
// HSA_AMD_MEMORY_POOL_GLOBAL_FLAG_KERNARG_INIT
hsa_status_t FindStandardPool(hsa_amd_memory_pool_t pool, void* data) {
  return FindGlobalPool(pool, data, false);
}

// This is the call-back function for hsa_amd_agent_iterate_memory_pools() that
// finds a pool with the properties of HSA_AMD_SEGMENT_GLOBAL and that IS
// HSA_AMD_MEMORY_POOL_GLOBAL_FLAG_KERNARG_INIT
hsa_status_t FindKernArgPool(hsa_amd_memory_pool_t pool, void* data) {
  return FindGlobalPool(pool, data, true);
}

// Constructor of the class
HsaRsrcFactory::HsaRsrcFactory(bool initialize_hsa) : initialize_hsa_(initialize_hsa) {
  hsa_status_t status;

  cpu_pool_ = NULL;
  kern_arg_pool_ = NULL;

  InitHsaApiTable(NULL);

  // Initialize the Hsa Runtime
  if (initialize_hsa_) {
    status = hsa_api_.hsa_init();
    CHECK_STATUS("Error in hsa_init", status);
  }

  // Discover the set of Gpu devices available on the platform
  status = hsa_api_.hsa_iterate_agents(GetHsaAgentsCallback, this);
  CHECK_STATUS("Error Calling hsa_iterate_agents", status);
  if (cpu_pool_ == NULL) CHECK_STATUS("CPU memory pool is not found", HSA_STATUS_ERROR);
  if (kern_arg_pool_ == NULL) CHECK_STATUS("Kern-arg memory pool is not found", HSA_STATUS_ERROR);

  // Get AqlProfile API table
  aqlprofile_api_ = {0};
#ifdef ROCP_LD_AQLPROFILE
  status = LoadAqlProfileLib(&aqlprofile_api_);
#else
  status = hsa_api_.hsa_system_get_major_extension_table(HSA_EXTENSION_AMD_AQLPROFILE, hsa_ven_amd_aqlprofile_VERSION_MAJOR, sizeof(aqlprofile_api_), &aqlprofile_api_);
#endif
  CHECK_STATUS("aqlprofile API table load failed", status);

  // Get Loader API table
  loader_api_ = {0};
  status = hsa_api_.hsa_system_get_major_extension_table(HSA_EXTENSION_AMD_LOADER, 1, sizeof(loader_api_), &loader_api_);
  CHECK_STATUS("loader API table query failed", status);

  // Instantiate HSA timer
  timer_ = new HsaTimer(&hsa_api_);
  CHECK_STATUS("HSA timer allocation failed",
    (timer_ == NULL) ? HSA_STATUS_ERROR : HSA_STATUS_SUCCESS);

  // Time correlation
  const uint32_t corr_iters = 1000;
  for (unsigned time_id = 0; time_id < HsaTimer::TIME_ID_NUMBER; time_id += 1) {
    CorrelateTime((HsaTimer::time_id_t)time_id, corr_iters);
  }

  // System timeout
  timeout_ = (timeout_ns_ == HsaTimer::TIMESTAMP_MAX) ? timeout_ns_ : timer_->ns_to_sysclock(timeout_ns_);

  // To dump code objects
  to_dump_code_obj_ = getenv("ROCP_DUMP_CODEOBJ");
}

// Destructor of the class
HsaRsrcFactory::~HsaRsrcFactory() {
  delete timer_;
  for (auto p : cpu_list_) delete p;
  for (auto p : gpu_list_) delete p;
  if (initialize_hsa_) {
    hsa_status_t status = hsa_api_.hsa_shut_down();
    CHECK_STATUS("Error in hsa_shut_down", status);
  }
}

void HsaRsrcFactory::InitHsaApiTable(HsaApiTable* table) {
  std::lock_guard<mutex_t> lck(mutex_);

  if (hsa_api_.hsa_init == NULL) {
    if (table != NULL) {
      hsa_api_.hsa_init = table->core_->hsa_init_fn;
      hsa_api_.hsa_shut_down = table->core_->hsa_shut_down_fn;
      hsa_api_.hsa_agent_get_info = table->core_->hsa_agent_get_info_fn;
      hsa_api_.hsa_iterate_agents = table->core_->hsa_iterate_agents_fn;

      hsa_api_.hsa_queue_create = table->core_->hsa_queue_create_fn;
      hsa_api_.hsa_queue_destroy = table->core_->hsa_queue_destroy_fn;
      hsa_api_.hsa_queue_load_read_index_relaxed = table->core_->hsa_queue_load_read_index_relaxed_fn;
      hsa_api_.hsa_queue_load_write_index_relaxed = table->core_->hsa_queue_load_write_index_relaxed_fn;
      hsa_api_.hsa_queue_add_write_index_scacq_screl = table->core_->hsa_queue_add_write_index_scacq_screl_fn;

      hsa_api_.hsa_signal_create = table->core_->hsa_signal_create_fn;
      hsa_api_.hsa_signal_destroy = table->core_->hsa_signal_destroy_fn;
      hsa_api_.hsa_signal_load_relaxed = table->core_->hsa_signal_load_relaxed_fn;
      hsa_api_.hsa_signal_store_relaxed = table->core_->hsa_signal_store_relaxed_fn;
      hsa_api_.hsa_signal_wait_scacquire = table->core_->hsa_signal_wait_scacquire_fn;
      hsa_api_.hsa_signal_store_screlease = table->core_->hsa_signal_store_screlease_fn;

      hsa_api_.hsa_code_object_reader_create_from_file = table->core_->hsa_code_object_reader_create_from_file_fn;
      hsa_api_.hsa_executable_create_alt = table->core_->hsa_executable_create_alt_fn;
      hsa_api_.hsa_executable_load_agent_code_object = table->core_->hsa_executable_load_agent_code_object_fn;
      hsa_api_.hsa_executable_freeze = table->core_->hsa_executable_freeze_fn;
      hsa_api_.hsa_executable_destroy = table->core_->hsa_executable_destroy_fn;
      hsa_api_.hsa_executable_get_symbol = table->core_->hsa_executable_get_symbol_fn;
      hsa_api_.hsa_executable_symbol_get_info = table->core_->hsa_executable_symbol_get_info_fn;
      hsa_api_.hsa_executable_iterate_symbols = table->core_->hsa_executable_iterate_symbols_fn;

      hsa_api_.hsa_system_get_info = table->core_->hsa_system_get_info_fn;
      hsa_api_.hsa_system_get_major_extension_table = table->core_->hsa_system_get_major_extension_table_fn;

      hsa_api_.hsa_amd_agent_iterate_memory_pools = table->amd_ext_->hsa_amd_agent_iterate_memory_pools_fn;
      hsa_api_.hsa_amd_memory_pool_get_info = table->amd_ext_->hsa_amd_memory_pool_get_info_fn;
      hsa_api_.hsa_amd_memory_pool_allocate = table->amd_ext_->hsa_amd_memory_pool_allocate_fn;
      hsa_api_.hsa_amd_agents_allow_access = table->amd_ext_->hsa_amd_agents_allow_access_fn;
      hsa_api_.hsa_amd_memory_async_copy = table->amd_ext_->hsa_amd_memory_async_copy_fn;

      hsa_api_.hsa_amd_signal_async_handler = table->amd_ext_->hsa_amd_signal_async_handler_fn;
      hsa_api_.hsa_amd_profiling_set_profiler_enabled = table->amd_ext_->hsa_amd_profiling_set_profiler_enabled_fn;
      hsa_api_.hsa_amd_profiling_get_async_copy_time = table->amd_ext_->hsa_amd_profiling_get_async_copy_time_fn;
      hsa_api_.hsa_amd_profiling_get_dispatch_time = table->amd_ext_->hsa_amd_profiling_get_dispatch_time_fn;
    } else {
      hsa_api_.hsa_init = hsa_init;
      hsa_api_.hsa_shut_down = hsa_shut_down;
      hsa_api_.hsa_agent_get_info = hsa_agent_get_info;
      hsa_api_.hsa_iterate_agents = hsa_iterate_agents;

      hsa_api_.hsa_queue_create = hsa_queue_create;
      hsa_api_.hsa_queue_destroy = hsa_queue_destroy;
      hsa_api_.hsa_queue_load_read_index_relaxed = hsa_queue_load_read_index_relaxed;
      hsa_api_.hsa_queue_load_write_index_relaxed = hsa_queue_load_write_index_relaxed;
      hsa_api_.hsa_queue_add_write_index_scacq_screl = hsa_queue_add_write_index_scacq_screl;

      hsa_api_.hsa_signal_create = hsa_signal_create;
      hsa_api_.hsa_signal_destroy = hsa_signal_destroy;
      hsa_api_.hsa_signal_load_relaxed = hsa_signal_load_relaxed;
      hsa_api_.hsa_signal_store_relaxed = hsa_signal_store_relaxed;
      hsa_api_.hsa_signal_wait_scacquire = hsa_signal_wait_scacquire;
      hsa_api_.hsa_signal_store_screlease = hsa_signal_store_screlease;

      hsa_api_.hsa_code_object_reader_create_from_file = hsa_code_object_reader_create_from_file;
      hsa_api_.hsa_executable_create_alt = hsa_executable_create_alt;
      hsa_api_.hsa_executable_load_agent_code_object = hsa_executable_load_agent_code_object;
      hsa_api_.hsa_executable_freeze = hsa_executable_freeze;
      hsa_api_.hsa_executable_destroy = hsa_executable_destroy;
      hsa_api_.hsa_executable_get_symbol = hsa_executable_get_symbol;
      hsa_api_.hsa_executable_symbol_get_info = hsa_executable_symbol_get_info;
      hsa_api_.hsa_executable_iterate_symbols = hsa_executable_iterate_symbols;

      hsa_api_.hsa_system_get_info = hsa_system_get_info;
      hsa_api_.hsa_system_get_major_extension_table = hsa_system_get_major_extension_table;

      hsa_api_.hsa_amd_agent_iterate_memory_pools = hsa_amd_agent_iterate_memory_pools;
      hsa_api_.hsa_amd_memory_pool_get_info = hsa_amd_memory_pool_get_info;
      hsa_api_.hsa_amd_memory_pool_allocate = hsa_amd_memory_pool_allocate;
      hsa_api_.hsa_amd_agents_allow_access = hsa_amd_agents_allow_access;
      hsa_api_.hsa_amd_memory_async_copy = hsa_amd_memory_async_copy;

      hsa_api_.hsa_amd_signal_async_handler = hsa_amd_signal_async_handler;
      hsa_api_.hsa_amd_profiling_set_profiler_enabled = hsa_amd_profiling_set_profiler_enabled;
      hsa_api_.hsa_amd_profiling_get_async_copy_time = hsa_amd_profiling_get_async_copy_time;
      hsa_api_.hsa_amd_profiling_get_dispatch_time = hsa_amd_profiling_get_dispatch_time;
    }
  }
}

hsa_status_t HsaRsrcFactory::LoadAqlProfileLib(aqlprofile_pfn_t* api) {
  void* handle = dlopen(kAqlProfileLib, RTLD_NOW);
  if (handle == NULL) {
    fprintf(stderr, "Loading '%s' failed, %s\n", kAqlProfileLib, dlerror());
    return HSA_STATUS_ERROR;
  }
  dlerror(); /* Clear any existing error */

  api->hsa_ven_amd_aqlprofile_error_string =
      (decltype(::hsa_ven_amd_aqlprofile_error_string)*)dlsym(
          handle, "hsa_ven_amd_aqlprofile_error_string");
  api->hsa_ven_amd_aqlprofile_validate_event =
      (decltype(::hsa_ven_amd_aqlprofile_validate_event)*)dlsym(
          handle, "hsa_ven_amd_aqlprofile_validate_event");
  api->hsa_ven_amd_aqlprofile_start =
      (decltype(::hsa_ven_amd_aqlprofile_start)*)dlsym(handle, "hsa_ven_amd_aqlprofile_start");
  api->hsa_ven_amd_aqlprofile_stop =
      (decltype(::hsa_ven_amd_aqlprofile_stop)*)dlsym(handle, "hsa_ven_amd_aqlprofile_stop");
#ifdef AQLPROF_NEW_API
  api->hsa_ven_amd_aqlprofile_read =
      (decltype(::hsa_ven_amd_aqlprofile_read)*)dlsym(handle, "hsa_ven_amd_aqlprofile_read");
#endif
  api->hsa_ven_amd_aqlprofile_legacy_get_pm4 =
      (decltype(::hsa_ven_amd_aqlprofile_legacy_get_pm4)*)dlsym(
          handle, "hsa_ven_amd_aqlprofile_legacy_get_pm4");
  api->hsa_ven_amd_aqlprofile_get_info = (decltype(::hsa_ven_amd_aqlprofile_get_info)*)dlsym(
      handle, "hsa_ven_amd_aqlprofile_get_info");
  api->hsa_ven_amd_aqlprofile_iterate_data =
      (decltype(::hsa_ven_amd_aqlprofile_iterate_data)*)dlsym(
          handle, "hsa_ven_amd_aqlprofile_iterate_data");

  return HSA_STATUS_SUCCESS;
}

// Add system agent info
const AgentInfo* HsaRsrcFactory::AddAgentInfo(const hsa_agent_t agent) {
  // Determine if device is a Gpu agent
  hsa_status_t status;
  AgentInfo* agent_info = NULL;

  hsa_device_type_t type;
  status = hsa_api_.hsa_agent_get_info(agent, HSA_AGENT_INFO_DEVICE, &type);
  CHECK_STATUS("Error Calling hsa_agent_get_info", status);

  if (type == HSA_DEVICE_TYPE_CPU) {
    agent_info = new AgentInfo{};
    agent_info->dev_id = agent;
    agent_info->dev_type = HSA_DEVICE_TYPE_CPU;
    agent_info->dev_index = cpu_list_.size();

    status = hsa_api_.hsa_amd_agent_iterate_memory_pools(agent, FindStandardPool, &agent_info->cpu_pool);
    if ((status == HSA_STATUS_INFO_BREAK) && (cpu_pool_ == NULL)) cpu_pool_ = &agent_info->cpu_pool;
    status = hsa_api_.hsa_amd_agent_iterate_memory_pools(agent, FindKernArgPool, &agent_info->kern_arg_pool);
    if ((status == HSA_STATUS_INFO_BREAK) && (kern_arg_pool_ == NULL)) kern_arg_pool_ = &agent_info->kern_arg_pool;
    agent_info->gpu_pool = {};

    cpu_list_.push_back(agent_info);
    cpu_agents_.push_back(agent);
  }

  if (type == HSA_DEVICE_TYPE_GPU) {
    agent_info = new AgentInfo{};
    agent_info->dev_id = agent;
    agent_info->dev_type = HSA_DEVICE_TYPE_GPU;
    hsa_api_.hsa_agent_get_info(agent, HSA_AGENT_INFO_NAME, agent_info->name);
    const int gfxip_label_len = std::min (strlen(agent_info->name) - 2, sizeof (agent_info->gfxip) - 1);
    memcpy(agent_info->gfxip, agent_info->name, gfxip_label_len);
    agent_info->gfxip[gfxip_label_len] = '\0';
    hsa_api_.hsa_agent_get_info(agent, HSA_AGENT_INFO_WAVEFRONT_SIZE, &agent_info->max_wave_size);
    hsa_api_.hsa_agent_get_info(agent, HSA_AGENT_INFO_QUEUE_MAX_SIZE, &agent_info->max_queue_size);
    hsa_api_.hsa_agent_get_info(agent, HSA_AGENT_INFO_PROFILE, &agent_info->profile);
    agent_info->is_apu = (agent_info->profile == HSA_PROFILE_FULL) ? true : false;
    hsa_api_.hsa_agent_get_info(agent, static_cast<hsa_agent_info_t>(HSA_AMD_AGENT_INFO_COMPUTE_UNIT_COUNT),
                       &agent_info->cu_num);
    hsa_api_.hsa_agent_get_info(agent, static_cast<hsa_agent_info_t>(HSA_AMD_AGENT_INFO_MAX_WAVES_PER_CU),
                       &agent_info->waves_per_cu);
    hsa_api_.hsa_agent_get_info(agent, static_cast<hsa_agent_info_t>(HSA_AMD_AGENT_INFO_NUM_SIMDS_PER_CU),
                       &agent_info->simds_per_cu);
    hsa_api_.hsa_agent_get_info(agent, static_cast<hsa_agent_info_t>(HSA_AMD_AGENT_INFO_NUM_SHADER_ENGINES),
                       &agent_info->se_num);
    hsa_api_.hsa_agent_get_info(agent,
                       static_cast<hsa_agent_info_t>(HSA_AMD_AGENT_INFO_NUM_SHADER_ARRAYS_PER_SE),
                       &agent_info->shader_arrays_per_se);

    agent_info->cpu_pool = {};
    agent_info->kern_arg_pool = {};
    status = hsa_api_.hsa_amd_agent_iterate_memory_pools(agent, FindStandardPool, &agent_info->gpu_pool);
    CHECK_ITER_STATUS("hsa_amd_agent_iterate_memory_pools(gpu pool)", status);

    // GFX8 and GFX9 SGPR/VGPR block sizes
    agent_info->sgpr_block_dflt = (strcmp(agent_info->gfxip, "gfx8") == 0) ? 1 : 2;
    agent_info->sgpr_block_size = 8;
    agent_info->vgpr_block_size = 4;

    // Set GPU index
    agent_info->dev_index = gpu_list_.size();
    gpu_list_.push_back(agent_info);
    gpu_agents_.push_back(agent);
  }

  if (agent_info) agent_map_[agent.handle] = agent_info;

  return agent_info;
}

// Return systen agent info
const AgentInfo* HsaRsrcFactory::GetAgentInfo(const hsa_agent_t agent) {
  const AgentInfo* agent_info = NULL;
  auto it = agent_map_.find(agent.handle);
  if (it != agent_map_.end()) {
    agent_info = it->second;
  }
  return agent_info;
}

// Get the count of Hsa Gpu Agents available on the platform
//
// @return uint32_t Number of Gpu agents on platform
//
uint32_t HsaRsrcFactory::GetCountOfGpuAgents() { return uint32_t(gpu_list_.size()); }

// Get the count of Hsa Cpu Agents available on the platform
//
// @return uint32_t Number of Cpu agents on platform
//
uint32_t HsaRsrcFactory::GetCountOfCpuAgents() { return uint32_t(cpu_list_.size()); }

// Get the AgentInfo handle of a Gpu device
//
// @param idx Gpu Agent at specified index
//
// @param agent_info Output parameter updated with AgentInfo
//
// @return bool true if successful, false otherwise
//
bool HsaRsrcFactory::GetGpuAgentInfo(uint32_t idx, const AgentInfo** agent_info) {
  // Determine if request is valid
  uint32_t size = uint32_t(gpu_list_.size());
  if (idx >= size) {
    return false;
  }

  // Copy AgentInfo from specified index
  *agent_info = gpu_list_[idx];

  return true;
}

// Get the AgentInfo handle of a Cpu device
//
// @param idx Cpu Agent at specified index
//
// @param agent_info Output parameter updated with AgentInfo
//
// @return bool true if successful, false otherwise
//
bool HsaRsrcFactory::GetCpuAgentInfo(uint32_t idx, const AgentInfo** agent_info) {
  // Determine if request is valid
  uint32_t size = uint32_t(cpu_list_.size());
  if (idx >= size) {
    return false;
  }

  // Copy AgentInfo from specified index
  *agent_info = cpu_list_[idx];
  return true;
}

// Create a Queue object and return its handle. The queue object is expected
// to support user requested number of Aql dispatch packets.
//
// @param agent_info Gpu Agent on which to create a queue object
//
// @param num_Pkts Number of packets to be held by queue
//
// @param queue Output parameter updated with handle of queue object
//
// @return bool true if successful, false otherwise
//
bool HsaRsrcFactory::CreateQueue(const AgentInfo* agent_info, uint32_t num_pkts,
                                 hsa_queue_t** queue) {
  hsa_status_t status;
  status = hsa_api_.hsa_queue_create(agent_info->dev_id, num_pkts, HSA_QUEUE_TYPE_MULTI, NULL, NULL,
                            UINT32_MAX, UINT32_MAX, queue);
  return (status == HSA_STATUS_SUCCESS);
}

// Create a Signal object and return its handle.
// @param value Initial value of signal object
// @param signal Output parameter updated with handle of signal object
// @return bool true if successful, false otherwise
bool HsaRsrcFactory::CreateSignal(uint32_t value, hsa_signal_t* signal) {
  hsa_status_t status;
  status = hsa_api_.hsa_signal_create(value, 0, NULL, signal);
  return (status == HSA_STATUS_SUCCESS);
}

// Allocate memory for use by a kernel of specified size in specified
// agent's memory region.
// @param agent_info Agent from whose memory region to allocate
// @param size Size of memory in terms of bytes
// @return uint8_t* Pointer to buffer, null if allocation fails.
uint8_t* HsaRsrcFactory::AllocateLocalMemory(const AgentInfo* agent_info, size_t size) {
  hsa_status_t status = HSA_STATUS_ERROR;
  uint8_t* buffer = NULL;
  size = (size + MEM_PAGE_MASK) & ~MEM_PAGE_MASK;
  status = hsa_api_.hsa_amd_memory_pool_allocate(agent_info->gpu_pool, size, 0, reinterpret_cast<void**>(&buffer));
  uint8_t* ptr = (status == HSA_STATUS_SUCCESS) ? buffer : NULL;
  return ptr;
}

// Allocate memory to pass kernel parameters.
// Memory is alocated accessible for all CPU agents and for GPU given by AgentInfo parameter.
// @param agent_info Agent from whose memory region to allocate
// @param size Size of memory in terms of bytes
// @return uint8_t* Pointer to buffer, null if allocation fails.
uint8_t* HsaRsrcFactory::AllocateKernArgMemory(const AgentInfo* agent_info, size_t size) {
  hsa_status_t status = HSA_STATUS_ERROR;
  uint8_t* buffer = NULL;
  if (!cpu_agents_.empty()) {
    size = (size + MEM_PAGE_MASK) & ~MEM_PAGE_MASK;
    status = hsa_api_.hsa_amd_memory_pool_allocate(*kern_arg_pool_, size, 0, reinterpret_cast<void**>(&buffer));
    // Both the CPU and GPU can access the kernel arguments
    if (status == HSA_STATUS_SUCCESS) {
      hsa_agent_t ag_list[1] = {agent_info->dev_id};
      status = hsa_api_.hsa_amd_agents_allow_access(1, ag_list, NULL, buffer);
    }
  }
  uint8_t* ptr = (status == HSA_STATUS_SUCCESS) ? buffer : NULL;
  return ptr;
}

// Allocate system memory accessible by both CPU and GPU
// @param agent_info Agent from whose memory region to allocate
// @param size Size of memory in terms of bytes
// @return uint8_t* Pointer to buffer, null if allocation fails.
uint8_t* HsaRsrcFactory::AllocateSysMemory(const AgentInfo* agent_info, size_t size) {
  hsa_status_t status = HSA_STATUS_ERROR;
  uint8_t* buffer = NULL;
  size = (size + MEM_PAGE_MASK) & ~MEM_PAGE_MASK;
  if (!cpu_agents_.empty()) {
    status = hsa_api_.hsa_amd_memory_pool_allocate(*cpu_pool_, size, 0, reinterpret_cast<void**>(&buffer));
    // Both the CPU and GPU can access the memory
    if (status == HSA_STATUS_SUCCESS) {
      hsa_agent_t ag_list[1] = {agent_info->dev_id};
      status = hsa_api_.hsa_amd_agents_allow_access(1, ag_list, NULL, buffer);
    }
  }
  uint8_t* ptr = (status == HSA_STATUS_SUCCESS) ? buffer : NULL;
  return ptr;
}

// Allocate memory for command buffer.
// @param agent_info Agent from whose memory region to allocate
// @param size Size of memory in terms of bytes
// @return uint8_t* Pointer to buffer, null if allocation fails.
uint8_t* HsaRsrcFactory::AllocateCmdMemory(const AgentInfo* agent_info, size_t size) {
  size = (size + MEM_PAGE_MASK) & ~MEM_PAGE_MASK;
  uint8_t* ptr = (agent_info->is_apu && CMD_MEMORY_MMAP)
      ? reinterpret_cast<uint8_t*>(
            mmap(NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_SHARED | MAP_ANONYMOUS, 0, 0))
      : AllocateSysMemory(agent_info, size);
  return ptr;
}

// Wait signal
hsa_signal_value_t HsaRsrcFactory::SignalWait(const hsa_signal_t& signal, const hsa_signal_value_t& signal_value) const {
  const hsa_signal_value_t exp_value = signal_value - 1;
  hsa_signal_value_t ret_value = signal_value;
  while (1) {
    ret_value =
      hsa_api_.hsa_signal_wait_scacquire(signal, HSA_SIGNAL_CONDITION_LT, signal_value, timeout_, HSA_WAIT_STATE_BLOCKED);
    if (ret_value == exp_value) break;
    if (ret_value != signal_value) {
      std::cerr << "Error: HsaRsrcFactory::SignalWait: signal_value(" << signal_value
                << "), ret_value(" << ret_value << ")" << std::endl << std::flush;
      abort();
    }
  }
  return ret_value;
}

// Wait signal with signal value restore
void HsaRsrcFactory::SignalWaitRestore(const hsa_signal_t& signal, const hsa_signal_value_t& signal_value) const {
  SignalWait(signal, signal_value);
  hsa_api_.hsa_signal_store_relaxed(const_cast<hsa_signal_t&>(signal), signal_value);
}

// Copy data from GPU to host memory
bool HsaRsrcFactory::Memcpy(const hsa_agent_t& agent, void* dst, const void* src, size_t size) {
  hsa_status_t status = HSA_STATUS_ERROR;
  if (!cpu_agents_.empty()) {
    hsa_signal_t s = {};
    status = hsa_api_.hsa_signal_create(1, 0, NULL, &s);
    CHECK_STATUS("hsa_signal_create()", status);
    status = hsa_api_.hsa_amd_memory_async_copy(dst, cpu_agents_[0], src, agent, size, 0, NULL, s);
    CHECK_STATUS("hsa_amd_memory_async_copy()", status);
    SignalWait(s, 1);
    status = hsa_api_.hsa_signal_destroy(s);
    CHECK_STATUS("hsa_signal_destroy()", status);
  }
  return (status == HSA_STATUS_SUCCESS);
}
bool HsaRsrcFactory::Memcpy(const AgentInfo* agent_info, void* dst, const void* src, size_t size) {
  return Memcpy(agent_info->dev_id, dst, src, size);
}

// Memory free method
bool HsaRsrcFactory::FreeMemory(void* ptr) {
  const hsa_status_t status = hsa_memory_free(ptr);
  CHECK_STATUS("hsa_memory_free", status);
  return (status == HSA_STATUS_SUCCESS);
}

// Loads an Assembled Brig file and Finalizes it into Device Isa
// @param agent_info Gpu device for which to finalize
// @param brig_path File path of the Assembled Brig file
// @param kernel_name Name of the kernel to finalize
// @param code_desc Handle of finalized Code Descriptor that could
// be used to submit for execution
// @return bool true if successful, false otherwise
bool HsaRsrcFactory::LoadAndFinalize(const AgentInfo* agent_info, const char* brig_path,
                                     const char* kernel_name, hsa_executable_t* executable,
                                     hsa_executable_symbol_t* code_desc) {
  hsa_status_t status = HSA_STATUS_ERROR;

  // Build the code object filename
  std::string filename(brig_path);
  std::clog << "Code object filename: " << filename << std::endl;

  // Open the file containing code object
  hsa_file_t file_handle = open(filename.c_str(), O_RDONLY);
  if (file_handle == -1) {
    std::cerr << "Error: failed to load '" << filename << "'" << std::endl;
    assert(false);
    return false;
  }

  // Create code object reader
  hsa_code_object_reader_t code_obj_rdr = {0};
  status = hsa_api_.hsa_code_object_reader_create_from_file(file_handle, &code_obj_rdr);
  if (status != HSA_STATUS_SUCCESS) {
    std::cerr << "Failed to create code object reader '" << filename << "'" << std::endl;
    return false;
  }

  // Create executable.
  status = hsa_api_.hsa_executable_create_alt(HSA_PROFILE_FULL, HSA_DEFAULT_FLOAT_ROUNDING_MODE_DEFAULT,
                                     NULL, executable);
  CHECK_STATUS("Error in creating executable object", status);

  // Load code object.
  status = hsa_api_.hsa_executable_load_agent_code_object(*executable, agent_info->dev_id, code_obj_rdr,
                                                 NULL, NULL);
  CHECK_STATUS("Error in loading executable object", status);

  // Freeze executable.
  status = hsa_api_.hsa_executable_freeze(*executable, "");
  CHECK_STATUS("Error in freezing executable object", status);

  // Get symbol handle.
  hsa_executable_symbol_t kernelSymbol;
  status = hsa_api_.hsa_executable_get_symbol(*executable, NULL, kernel_name, agent_info->dev_id, 0,
                                     &kernelSymbol);
  CHECK_STATUS("Error in looking up kernel symbol", status);

  close(file_handle);

  // Update output parameter
  *code_desc = kernelSymbol;
  return true;
}

// Print the various fields of Hsa Gpu Agents
bool HsaRsrcFactory::PrintGpuAgents(const std::string& header) {
  std::cout << std::flush;
  std::clog << header << " :" << std::endl;

  const AgentInfo* agent_info;
  int size = uint32_t(gpu_list_.size());
  for (int idx = 0; idx < size; idx++) {
    agent_info = gpu_list_[idx];

    std::clog << "> agent[" << idx << "] :" << std::endl;
    std::clog << ">> Name : " << agent_info->name << std::endl;
    std::clog << ">> APU : " << agent_info->is_apu << std::endl;
    std::clog << ">> HSAIL profile : " << agent_info->profile << std::endl;
    std::clog << ">> Max Wave Size : " << agent_info->max_wave_size << std::endl;
    std::clog << ">> Max Queue Size : " << agent_info->max_queue_size << std::endl;
    std::clog << ">> CU number : " << agent_info->cu_num << std::endl;
    std::clog << ">> Waves per CU : " << agent_info->waves_per_cu << std::endl;
    std::clog << ">> SIMDs per CU : " << agent_info->simds_per_cu << std::endl;
    std::clog << ">> SE number : " << agent_info->se_num << std::endl;
    std::clog << ">> Shader Arrays per SE : " << agent_info->shader_arrays_per_se << std::endl;
  }
  return true;
}

void* HsaRsrcFactory::GetSlotPointer(hsa_queue_t* queue, const uint64_t& idx) {
  const uint32_t slot_size_b = CMD_SLOT_SIZE_B;
  const uint32_t slot_idx = (uint32_t)(idx % queue->size);
  void* queue_slot = reinterpret_cast<void*>((uintptr_t)(queue->base_address) + (slot_idx * slot_size_b));
  return queue_slot;
}

void* HsaRsrcFactory::GetReadPointer(hsa_queue_t* queue) {
  const uint64_t read_idx = hsa_api_.hsa_queue_load_read_index_relaxed(queue);
  return GetSlotPointer(queue, read_idx);
}

uint64_t HsaRsrcFactory::Submit(hsa_queue_t* queue, const void* packet) {
  const uint32_t slot_size_b = CMD_SLOT_SIZE_B;

  // adevance command queue
  const uint64_t write_idx = hsa_api_.hsa_queue_add_write_index_scacq_screl(queue, 1);
  while ((write_idx - hsa_api_.hsa_queue_load_read_index_relaxed(queue)) >= queue->size) {
    sched_yield();
  }

  const uint32_t slot_idx = (uint32_t)(write_idx % queue->size);
  uint32_t* queue_slot = reinterpret_cast<uint32_t*>((uintptr_t)(queue->base_address) + (slot_idx * slot_size_b));
  const uint32_t* slot_data = reinterpret_cast<const uint32_t*>(packet);

  // Copy buffered commands into the queue slot.
  // Overwrite the AQL invalid header (first dword) last.
  // This prevents the slot from being read until it's fully written.
  memcpy(&queue_slot[1], &slot_data[1], slot_size_b - sizeof(uint32_t));
  std::atomic<uint32_t>* header_atomic_ptr =
      reinterpret_cast<std::atomic<uint32_t>*>(&queue_slot[0]);
  header_atomic_ptr->store(slot_data[0], std::memory_order_release);

  // ringdoor bell
  hsa_api_.hsa_signal_store_relaxed(queue->doorbell_signal, write_idx);

  return write_idx;
}

uint64_t HsaRsrcFactory::Submit(hsa_queue_t* queue, const void* packet, size_t size_bytes) {
  const uint32_t slot_size_b = CMD_SLOT_SIZE_B;
  if ((size_bytes & (slot_size_b - 1)) != 0) {
    fprintf(stderr, "HsaRsrcFactory::Submit: Bad packet size %zx\n", size_bytes);
    abort();
  }

  const char* begin = reinterpret_cast<const char*>(packet);
  const char* end = begin + size_bytes;
  uint64_t write_idx = 0;
  for (const char* ptr = begin; ptr < end; ptr += slot_size_b) {
    write_idx = Submit(queue, ptr);
  }

  return write_idx;
}

const char* HsaRsrcFactory::GetKernelNameRef(uint64_t addr) {
  std::lock_guard<mutex_t> lck(mutex_);
  const auto it = symbols_map_->find(addr);
  if (it == symbols_map_->end()) {
    fprintf(stderr, "HsaRsrcFactory::GetKernelNameRef: kernel addr (0x%lx) is not found\n", addr);
    abort();
  }
  return it->second;
}

void HsaRsrcFactory::EnableExecutableTracking(HsaApiTable* table) {
  std::lock_guard<mutex_t> lck(mutex_);
  executable_tracking_on_ = true;
  table->core_->hsa_executable_freeze_fn = hsa_executable_freeze_interceptor;
  table->core_->hsa_executable_destroy_fn = hsa_executable_destroy_interceptor;
}

hsa_status_t HsaRsrcFactory::executable_symbols_cb(hsa_executable_t exec, hsa_executable_symbol_t symbol, void *data) {
  hsa_symbol_kind_t value = (hsa_symbol_kind_t)0;
  hsa_status_t status = hsa_api_.hsa_executable_symbol_get_info(symbol, HSA_EXECUTABLE_SYMBOL_INFO_TYPE, &value);
  CHECK_STATUS("Error in getting symbol info", status);
  if (value == HSA_SYMBOL_KIND_KERNEL) {
    uint64_t addr = 0;
    uint32_t len = 0;
    status = hsa_api_.hsa_executable_symbol_get_info(symbol, HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_OBJECT, &addr);
    CHECK_STATUS("Error in getting kernel object", status);
    status = hsa_api_.hsa_executable_symbol_get_info(symbol, HSA_EXECUTABLE_SYMBOL_INFO_NAME_LENGTH, &len);
    CHECK_STATUS("Error in getting name len", status);
    char symname[len + 1];
    status = hsa_api_.hsa_executable_symbol_get_info(symbol, HSA_EXECUTABLE_SYMBOL_INFO_NAME, symname);
    CHECK_STATUS("Error in getting kernel name", status);
    symname[len] = 0;
    if (data == NULL) {
      const char* name = cpp_demangle(symname);
      auto ret = symbols_map_->insert({addr, name});
      if (ret.second == false) {
        delete[] ret.first->second;
        ret.first->second = name;
      }
    } else {
      symbols_map_->erase(addr);
    }
  }
  return HSA_STATUS_SUCCESS;
}

hsa_status_t HsaRsrcFactory::hsa_executable_freeze_interceptor(hsa_executable_t executable, const char *options) {
  std::lock_guard<mutex_t> lck(mutex_);
  if (symbols_map_ == NULL) symbols_map_ = new symbols_map_t;
  hsa_status_t status = hsa_api_.hsa_executable_iterate_symbols(executable, executable_symbols_cb, NULL);
  CHECK_STATUS("Error in iterating executable symbols", status);
  return hsa_api_.hsa_executable_freeze(executable, options);
}

hsa_status_t HsaRsrcFactory::hsa_executable_destroy_interceptor(hsa_executable_t executable) {
  std::lock_guard<mutex_t> lck(mutex_);
  if (symbols_map_ != NULL) {
    hsa_status_t status = hsa_api_.hsa_executable_iterate_symbols(executable, executable_symbols_cb, (void*)1);
    CHECK_STATUS("Error in iterating executable symbols", status);
  }
  return hsa_api_.hsa_executable_destroy(executable);
}

std::atomic<HsaRsrcFactory*> HsaRsrcFactory::instance_{};
HsaRsrcFactory::mutex_t HsaRsrcFactory::mutex_;
HsaRsrcFactory::timestamp_t HsaRsrcFactory::timeout_ns_ = HsaTimer::TIMESTAMP_MAX;
hsa_pfn_t HsaRsrcFactory::hsa_api_{};
bool HsaRsrcFactory::executable_tracking_on_ = false;
HsaRsrcFactory::symbols_map_t* HsaRsrcFactory::symbols_map_ = NULL;
void* HsaRsrcFactory::to_dump_code_obj_ = NULL;

}  // namespace util
}  // namespace rocprofiler