hipFatbin/source/add.cpp at main · jatinx/hipFatbin · GitHub

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#include <hipFatbin.h>

#include <algorithm>
#include <cstring>

#include "handle.hpp"
#include "offload.hpp"

extern "C" {
hipFatbinResult hipFatbinAddCubin(hipFatbinHandle handle, const void *code,
                                  size_t size, const char *arch,
                                  const char *identifier) {
  if (handle == nullptr || code == nullptr || arch == nullptr) {
    return HIPFATBIN_ERROR_NULL_POINTER;
  }
  if (size == 0) {
    return HIPFATBIN_ERROR_EMPTY_INPUT;
  }

  // Bare minimum validation of ELF
  if(std::memcmp(reinterpret_cast<const char*>(code) + 1, "ELF", 3) != 0) {
    return HIPFATBIN_ERROR_UNSUPPORTED_ACTION;
  }

  fatbin::BinContainer c;
  c.type_ = fatbin::BinaryType::BINARY;
  c.arch_ = std::string{arch};
  c.name_ = std::string{identifier};
  c.bin_ = std::vector<unsigned char>((unsigned char *)code,
                                      ((unsigned char *)code) + size);

  auto h = reinterpret_cast<fatbin::Handle *>(handle);
  h->built_ = false;
  h->inputs_.emplace_back(std::move(c));

  return HIPFATBIN_SUCCESS;
}

hipFatbinResult hipFatbinAddSPIRV(hipFatbinHandle handle, const char *code,
                                  size_t size, const char *identifier) {
  if (handle == nullptr || code == nullptr) {
    return HIPFATBIN_ERROR_NULL_POINTER;
  }
  if (size == 0) {
    return HIPFATBIN_ERROR_EMPTY_INPUT;
  }

  fatbin::BinContainer c;
  c.type_ = fatbin::BinaryType::SPIRV;
  c.arch_ = std::string{"amdgcnspirv"};
  c.name_ = std::string{identifier};
  c.bin_ = std::vector<unsigned char>((unsigned char *)code,
                                      ((unsigned char *)code) + size);
  c.opts_ = "";

  auto h = reinterpret_cast<fatbin::Handle *>(handle);
  h->built_ = false;
  h->inputs_.emplace_back(std::move(c));

  return HIPFATBIN_SUCCESS;
}

hipFatbinResult hipFatbinAddFatbin(hipFatbinHandle handle, const void *code,
                                   size_t size) {
  if (handle == nullptr || code == nullptr) {
    return HIPFATBIN_ERROR_NULL_POINTER;
  }
  if (size == 0) {
    return HIPFATBIN_ERROR_EMPTY_INPUT;
  }

  auto h = reinterpret_cast<fatbin::Handle *>(handle);
  h->built_ = false;

  // Unpack the fabin and insert each of its code objects
  auto *header = reinterpret_cast<const __ClangOffloadBundleHeader *>(code);
  std::string m(header->magic, CLANG_OFFLOAD_BUNDLER_MAGIC_STR.size());
  if (m != CLANG_OFFLOAD_BUNDLER_MAGIC_STR) {
    return HIPFATBIN_ERROR_INVALID_FATBIN;  // magic string missing
  }

  const auto *desc = &header->desc[0];
  for (size_t i = 0; i < header->numOfCodeObjects;
       ++i, desc = reinterpret_cast<const __ClangOffloadBundleInfo *>(
                reinterpret_cast<uintptr_t>(&desc->bundleEntryId[0]) +
                desc->bundleEntryIdSize)) {
    const void *image = reinterpret_cast<const void *>(
        reinterpret_cast<uintptr_t>(header) + desc->offset);
    const size_t image_size = desc->size;

    std::string bundleEntryId{desc->bundleEntryId, desc->bundleEntryIdSize};

    // Handle the host bundle
    if (bundleEntryId.find("host-x86_64") != std::string::npos) {
      fatbin::BinContainer c;
      c.type_ = fatbin::BinaryType::HOST;
      c.arch_ = bundleEntryId;
      c.name_ = "";
      c.bin_ = std::vector<unsigned char>(
          (unsigned char *)image, ((unsigned char *)image) + image_size);
      h->inputs_.emplace_back(std::move(c));
      continue;
    }

    fatbin::BinContainer c;
    if (bundleEntryId.find("amdgcnspirv") != std::string::npos) {
      c.type_ = fatbin::BinaryType::SPIRV;
      c.arch_ = std::string{"amdgcnspirv"};
    } else {
      constexpr std::string_view triple = "hipv4-amdgcn-amd-amdhsa--";
      c.type_ = fatbin::BinaryType::BINARY;
      c.arch_ = bundleEntryId.substr(triple.size());
    }

    c.name_ = "";
    c.bin_ = std::vector<unsigned char>((unsigned char *)image,
                                        ((unsigned char *)image) + image_size);
    h->inputs_.emplace_back(std::move(c));
  }

  return HIPFATBIN_SUCCESS;
}

hipFatbinResult hipFatbinRemoveArch(hipFatbinHandle handle, const char *arch) {
  if (handle == nullptr) {
    return HIPFATBIN_ERROR_NULL_POINTER;
  }
  if (arch == nullptr) {
    return HIPFATBIN_ERROR_EMPTY_INPUT;
  }

  auto h = reinterpret_cast<fatbin::Handle *>(handle);
  h->built_ = false;
  auto count = std::erase_if(
      h->inputs_, [&](const auto &i) { return i.arch_ == std::string(arch); });

  return count == 1 ? HIPFATBIN_SUCCESS : HIPFATBIN_ERROR_NOT_FOUND;
}

hipFatbinResult hipFatbinAddReloc(hipFatbinHandle /* handle */,
                                  const void * /* code */, size_t /* size */) {
  return HIPFATBIN_ERROR_UNSUPPORTED_ACTION;
}
}