[Offload] Implement 'olIsValidBinary' in offload and clean up

offload/liboffload/API/Program.td

@@ -24,6 +24,18 @@ def olCreateProgram : Function {
     let returns = [];
 }
 
+def olIsValidBinary : Function {
+    let desc = "Validate if the binary image pointed to by `ProgData` is compatible with the device.";
+    let details = ["The provided `ProgData` will not be loaded onto the device"];
+    let params = [
+        Param<"ol_device_handle_t", "Device", "handle of the device", PARAM_IN>,
+        Param<"const void*", "ProgData", "pointer to the program binary data", PARAM_IN>,
+        Param<"size_t", "ProgDataSize", "size of the program binary in bytes", PARAM_IN>,
+        Param<"bool*", "Valid", "output is true if the image is compatible", PARAM_OUT>
+    ];
+    let returns = [];
+}
+
 def olDestroyProgram : Function {
     let desc = "Destroy the program and free all underlying resources.";
     let details = [];

offload/liboffload/src/OffloadImpl.cpp

@@ -899,6 +899,15 @@ Error olCreateProgram_impl(ol_device_handle_t Device, const void *ProgData,
   return Error::success();
 }
 
+Error olIsValidBinary_impl(ol_device_handle_t Device, const void *ProgData,
+                           size_t ProgDataSize, bool *IsValid) {
+  // Make a copy of the program binary in case it is released by the caller.
+  StringRef Buffer(reinterpret_cast<const char *>(ProgData), ProgDataSize);
+  *IsValid = Device->Device->Plugin.isDeviceCompatible(
+      Device->Device->getDeviceId(), Buffer);
+  return Error::success();
+}
+
 Error olDestroyProgram_impl(ol_program_handle_t Program) {
   auto &Device = Program->Image->getDevice();
   if (auto Err = Device.unloadBinary(Program->Image))

offload/libomptarget/PluginManager.cpp

@@ -219,7 +219,10 @@ void PluginManager::registerLib(__tgt_bin_desc *Desc) {
     // Scan the RTLs that have associated images until we find one that supports
     // the current image.
     for (auto &R : plugins()) {
-      if (!R.is_plugin_compatible(Img))
+      StringRef Buffer(reinterpret_cast<const char *>(Img->ImageStart),
+                       utils::getPtrDiff(Img->ImageEnd, Img->ImageStart));
+
+      if (!R.isPluginCompatible(Buffer))
         continue;
 
       if (!initializePlugin(R))
@@ -242,7 +245,7 @@ void PluginManager::registerLib(__tgt_bin_desc *Desc) {
           continue;
         }
 
-        if (!R.is_device_compatible(DeviceId, Img))
+        if (!R.isDeviceCompatible(DeviceId, Buffer))
           continue;
 
         DP("Image " DPxMOD " is compatible with RTL %s device %d!\n",

offload/plugins-nextgen/common/include/PluginInterface.h

@@ -1378,10 +1378,10 @@ struct GenericPluginTy {
 
   /// Returns non-zero if the \p Image is compatible with the plugin. This
   /// function does not require the plugin to be initialized before use.
-  int32_t is_plugin_compatible(__tgt_device_image *Image);
+  int32_t isPluginCompatible(StringRef Image);
 
   /// Returns non-zero if the \p Image is compatible with the device.
-  int32_t is_device_compatible(int32_t DeviceId, __tgt_device_image *Image);
+  int32_t isDeviceCompatible(int32_t DeviceId, StringRef Image);
 
   /// Returns non-zero if the plugin device has been initialized.
   int32_t is_device_initialized(int32_t DeviceId) const;

offload/plugins-nextgen/common/src/PluginInterface.cpp

@@ -1713,28 +1713,25 @@ Expected<bool> GenericPluginTy::checkBitcodeImage(StringRef Image) const {
 
 int32_t GenericPluginTy::is_initialized() const { return Initialized; }
 
-int32_t GenericPluginTy::is_plugin_compatible(__tgt_device_image *Image) {
-  StringRef Buffer(reinterpret_cast<const char *>(Image->ImageStart),
-                   utils::getPtrDiff(Image->ImageEnd, Image->ImageStart));
-
+int32_t GenericPluginTy::isPluginCompatible(StringRef Image) {
   auto HandleError = [&](Error Err) -> bool {
     [[maybe_unused]] std::string ErrStr = toString(std::move(Err));
     DP("Failure to check validity of image %p: %s", Image, ErrStr.c_str());
     return false;
   };
-  switch (identify_magic(Buffer)) {
+  switch (identify_magic(Image)) {
   case file_magic::elf:
   case file_magic::elf_relocatable:
   case file_magic::elf_executable:
   case file_magic::elf_shared_object:
   case file_magic::elf_core: {
-    auto MatchOrErr = checkELFImage(Buffer);
+    auto MatchOrErr = checkELFImage(Image);
     if (Error Err = MatchOrErr.takeError())
       return HandleError(std::move(Err));
     return *MatchOrErr;
   }
   case file_magic::bitcode: {
-    auto MatchOrErr = checkBitcodeImage(Buffer);
+    auto MatchOrErr = checkBitcodeImage(Image);
     if (Error Err = MatchOrErr.takeError())
       return HandleError(std::move(Err));
     return *MatchOrErr;
@@ -1744,36 +1741,32 @@ int32_t GenericPluginTy::is_plugin_compatible(__tgt_device_image *Image) {
   }
 }
 
-int32_t GenericPluginTy::is_device_compatible(int32_t DeviceId,
-                                              __tgt_device_image *Image) {
-  StringRef Buffer(reinterpret_cast<const char *>(Image->ImageStart),
-                   utils::getPtrDiff(Image->ImageEnd, Image->ImageStart));
-
+int32_t GenericPluginTy::isDeviceCompatible(int32_t DeviceId, StringRef Image) {
   auto HandleError = [&](Error Err) -> bool {
     [[maybe_unused]] std::string ErrStr = toString(std::move(Err));
     DP("Failure to check validity of image %p: %s", Image, ErrStr.c_str());
     return false;
   };
-  switch (identify_magic(Buffer)) {
+  switch (identify_magic(Image)) {
   case file_magic::elf:
   case file_magic::elf_relocatable:
   case file_magic::elf_executable:
   case file_magic::elf_shared_object:
   case file_magic::elf_core: {
-    auto MatchOrErr = checkELFImage(Buffer);
+    auto MatchOrErr = checkELFImage(Image);
     if (Error Err = MatchOrErr.takeError())
       return HandleError(std::move(Err));
     if (!*MatchOrErr)
       return false;
 
     // Perform plugin-dependent checks for the specific architecture if needed.
-    auto CompatibleOrErr = isELFCompatible(DeviceId, Buffer);
+    auto CompatibleOrErr = isELFCompatible(DeviceId, Image);
     if (Error Err = CompatibleOrErr.takeError())
       return HandleError(std::move(Err));
     return *CompatibleOrErr;
   }
   case file_magic::bitcode: {
-    auto MatchOrErr = checkBitcodeImage(Buffer);
+    auto MatchOrErr = checkBitcodeImage(Image);
     if (Error Err = MatchOrErr.takeError())
       return HandleError(std::move(Err));
     return *MatchOrErr;

offload/unittests/OffloadAPI/CMakeLists.txt

@@ -35,6 +35,7 @@ add_offload_unittest("platform"
 
 add_offload_unittest("program"
     program/olCreateProgram.cpp
+    program/olIsValidBinary.cpp
     program/olDestroyProgram.cpp)
 
 add_offload_unittest("queue"

offload/unittests/OffloadAPI/program/olIsValidBinary.cpp

@@ -0,0 +1,35 @@
+//===------- Offload API tests - olIsValidBinary --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "../common/Fixtures.hpp"
+#include <OffloadAPI.h>
+#include <gtest/gtest.h>
+
+using olIsValidBinaryTest = OffloadDeviceTest;
+OFFLOAD_TESTS_INSTANTIATE_DEVICE_FIXTURE(olIsValidBinaryTest);
+
+TEST_P(olIsValidBinaryTest, Success) {
+
+  std::unique_ptr<llvm::MemoryBuffer> DeviceBin;
+  ASSERT_TRUE(TestEnvironment::loadDeviceBinary("foo", Device, DeviceBin));
+  ASSERT_GE(DeviceBin->getBufferSize(), 0lu);
+
+  bool IsValid = false;
+  ASSERT_SUCCESS(olIsValidBinary(Device, DeviceBin->getBufferStart(),
+                                 DeviceBin->getBufferSize(), &IsValid));
+  ASSERT_TRUE(IsValid);
+
+  ASSERT_SUCCESS(
+      olIsValidBinary(Device, DeviceBin->getBufferStart(), 0, &IsValid));
+  ASSERT_FALSE(IsValid);
+
+  ASSERT_ERROR(
+      OL_ERRC_INVALID_NULL_POINTER,
+      olIsValidBinary(Device, nullptr, DeviceBin->getBufferSize(), &IsValid));
+  ASSERT_FALSE(IsValid);
+}