Add debug flag to print called ioctls

Signed-off-by: Lukasz Jobczyk <[email protected]>

Author: LukaszJobczyk

opencl/test/unit_test/linux/main_linux_dll.cpp

@@ -157,6 +157,23 @@ TEST(DrmTest, GivenSelectedExistingDeviceWhenOpenDirFailsThenRetryOpeningRenderD
     EXPECT_STREQ("00:03.0", hwDeviceIds[1]->getPciPath());
 }
 
+TEST(DrmTest, givenPrintIoctlEntriesWhenCallIoctlThenIoctlIsPrinted) {
+    ::testing::internal::CaptureStdout();
+
+    auto executionEnvironment = std::make_unique<ExecutionEnvironment>();
+    executionEnvironment->prepareRootDeviceEnvironments(1);
+    auto drm = DrmWrap::createDrm(*executionEnvironment->rootDeviceEnvironments[0]);
+
+    DebugManagerStateRestore restorer;
+    DebugManager.flags.PrintIoctlEntries.set(true);
+
+    uint32_t contextId = 1u;
+    drm->destroyDrmContext(contextId);
+
+    std::string output = ::testing::internal::GetCapturedStdout();
+    EXPECT_STREQ(output.c_str(), "IOCTL 1074291822 called\nIOCTL 1074291822 returns 0, errno 9\n");
+}
+
 TEST(DrmTest, givenPrintIoctlTimesWhenCallIoctlThenStatisticsAreGathered) {
     struct DrmMock : public Drm {
         using Drm::ioctlStatistics;

opencl/test/unit_test/test_files/igdrcl.config

@@ -220,6 +220,7 @@ EnableHostUsmSupport = -1
 ForceBtpPrefetchMode = -1
 OverrideProfilingTimerResolution = -1
 PrintIoctlTimes = 0
+PrintIoctlEntries = 0
 UpdateTaskCountFromWait = -1
 PreferCopyEngineForCopyBufferToBuffer = -1
 EnableStaticPartitioning = -1

shared/source/debug_settings/debug_variables_base.inl

@@ -129,6 +129,7 @@ DECLARE_DEBUG_VARIABLE(bool, PrintTagAllocationAddress, false, "Print tag alloca
 DECLARE_DEBUG_VARIABLE(bool, ProvideVerboseImplicitFlush, false, "provides verbose messages about implicit flush mechanism")
 DECLARE_DEBUG_VARIABLE(bool, PrintBlitDispatchDetails, false, "Print blit dispatch details")
 DECLARE_DEBUG_VARIABLE(bool, PrintIoctlTimes, false, "Print ioctl times")
+DECLARE_DEBUG_VARIABLE(bool, PrintIoctlEntries, false, "Print ioctl being called")
 
 /*PERFORMANCE FLAGS*/
 DECLARE_DEBUG_VARIABLE(bool, DisableZeroCopyForBuffers, false, "When active all buffer allocations will not share memory with CPU.")

shared/source/os_interface/linux/drm_neo.cpp

@@ -77,8 +77,18 @@ int Drm::ioctl(unsigned long request, void *arg) {
             start = std::chrono::steady_clock::now();
         }
 
+        auto printIoctl = DebugManager.flags.PrintIoctlEntries.get();
+
+        if (printIoctl) {
+            printf("IOCTL %lu called\n", request);
+        }
+
         ret = SysCalls::ioctl(getFileDescriptor(), request, arg);
 
+        if (printIoctl) {
+            printf("IOCTL %lu returns %d, errno %d\n", request, ret, errno);
+        }
+
         if (measureTime) {
             end = std::chrono::steady_clock::now();
             auto elapsedTime = std::chrono::duration_cast<std::chrono::nanoseconds>(end - start).count();