Fix for Metric Api test that attempts OS (fstat) function.

Signed-off-by: Piotr Maciejewski <piotr.maciejewski@intel.com>

level_zero/tools/source/metrics/linux/os_metric_enumeration_imp_linux.cpp

@@ -7,6 +7,7 @@
 
 #include "shared/source/os_interface/linux/drm_neo.h"
 #include "shared/source/os_interface/linux/os_interface.h"
+#include "shared/source/os_interface/linux/sys_calls.h"
 
 #include "level_zero/tools/source/metrics/metric_enumeration_imp.h"
 
@@ -25,7 +26,7 @@ bool MetricEnumeration::getAdapterId(uint32_t &adapterMajor, uint32_t &adapterMi
     auto drmFile = drm->getFileDescriptor();
     struct stat drmStat = {};
 
-    int32_t result = fstat(drmFile, &drmStat);
+    int32_t result = NEO::SysCalls::fstat(drmFile, &drmStat);
 
     adapterMajor = major(drmStat.st_rdev);
     adapterMinor = minor(drmStat.st_rdev);

level_zero/tools/test/unit_tests/sources/metrics/linux/test_metric_query_pool_linux.cpp

@@ -7,6 +7,7 @@
 
 #include "shared/source/os_interface/device_factory.h"
 #include "shared/source/os_interface/linux/os_interface.h"
+#include "shared/source/os_interface/linux/sys_calls.h"
 
 #include "opencl/test/unit_test/os_interface/linux/drm_mock.h"
 #include "test.h"
@@ -19,6 +20,12 @@
 using ::testing::_;
 using ::testing::Return;
 
+namespace NEO {
+namespace SysCalls {
+extern int fstatFuncRetVal;
+} // namespace SysCalls
+} // namespace NEO
+
 namespace L0 {
 namespace ult {
 
@@ -328,11 +335,25 @@ TEST_F(MetricEnumerationTestLinux, givenIcorrectOpenMetricDeviceOnAdapterWhenGet
     EXPECT_NE(mockMetricEnumeration->openMetricsDiscovery(), ZE_RESULT_SUCCESS);
 }
 
-TEST_F(MetricEnumerationTestLinux, givenIcorrectDrmFileForFstaWhenGetMetricsAdapterThenReturnFail) {
+TEST_F(MetricEnumerationTestLinux, givenCorrectDrmFileForFstatWhenGetMetricsAdapterThenReturnSuccess) {
 
     uint32_t drmMajor = 0;
     uint32_t drmMinor = 0;
 
+    VariableBackup<int> fstatBackup(&NEO::SysCalls::fstatFuncRetVal);
+    NEO::SysCalls::fstatFuncRetVal = 0;
+
+    EXPECT_EQ(mockMetricEnumeration->baseGetAdapterId(drmMajor, drmMinor), true);
+}
+
+TEST_F(MetricEnumerationTestLinux, givenIncorrectDrmFileForFstatWhenGetMetricsAdapterThenReturnFail) {
+
+    uint32_t drmMajor = 0;
+    uint32_t drmMinor = 0;
+
+    VariableBackup<int> fstatBackup(&NEO::SysCalls::fstatFuncRetVal);
+    NEO::SysCalls::fstatFuncRetVal = -1;
+
     EXPECT_EQ(mockMetricEnumeration->baseGetAdapterId(drmMajor, drmMinor), false);
 }
 

opencl/test/unit_test/linux/main_linux_dll.cpp

@@ -544,6 +544,12 @@ TEST(SysCalls, WhenSysCallsPollCalledThenCallIsRedirectedToOs) {
     EXPECT_EQ(0, result);
 }
 
+TEST(SysCalls, WhenSysCallsFstatCalledThenCallIsRedirectedToOs) {
+    struct stat st = {};
+    auto result = NEO::SysCalls::fstat(0, &st);
+    EXPECT_EQ(0, result);
+}
+
 int main(int argc, char **argv) {
     bool useDefaultListener = false;
 

opencl/test/unit_test/os_interface/linux/sys_calls_linux_ult.cpp

@@ -37,6 +37,7 @@ int ioctlVmCreateReturned = 0u;
 uint64_t ioctlVmCreateExtensionArg = 0ull;
 constexpr unsigned long int invalidIoctl = static_cast<unsigned long int>(-1);
 int setErrno = 0;
+int fstatFuncRetVal = 0;
 
 int close(int fileDescriptor) {
     closeFuncCalled++;
@@ -124,5 +125,8 @@ int poll(struct pollfd *pollFd, unsigned long int numberOfFds, int timeout) {
     return 0;
 }
 
+int fstat(int fd, struct stat *buf) {
+    return fstatFuncRetVal;
+}
 } // namespace SysCalls
 } // namespace NEO

shared/source/os_interface/linux/sys_calls.h

@@ -8,6 +8,7 @@
 #pragma once
 #include <iostream>
 #include <poll.h>
+#include <sys/stat.h>
 
 namespace NEO {
 namespace SysCalls {
@@ -19,5 +20,6 @@ int getDevicePath(int deviceFd, char *buf, size_t &bufSize);
 int access(const char *pathname, int mode);
 int readlink(const char *path, char *buf, size_t bufsize);
 int poll(struct pollfd *pollFd, unsigned long int numberOfFds, int timeout);
+int fstat(int fd, struct stat *buf);
 } // namespace SysCalls
 } // namespace NEO

shared/source/os_interface/linux/sys_calls_linux.cpp

@@ -43,7 +43,7 @@ int readlink(const char *path, char *buf, size_t bufsize) {
 
 int getDevicePath(int deviceFd, char *buf, size_t &bufSize) {
     struct stat st;
-    if (fstat(deviceFd, &st)) {
+    if (::fstat(deviceFd, &st)) {
         return -1;
     }
 
@@ -56,5 +56,9 @@ int getDevicePath(int deviceFd, char *buf, size_t &bufSize) {
 int poll(struct pollfd *pollFd, unsigned long int numberOfFds, int timeout) {
     return ::poll(pollFd, numberOfFds, timeout);
 }
+
+int fstat(int fd, struct stat *buf) {
+    return ::fstat(fd, buf);
+}
 } // namespace SysCalls
 } // namespace NEO