[SYCL] Set line buffering mode for stderr for some assert tests (#872)

Co-authored-by: Elovikov, Andrei <[email protected]>

Author: s-kanaev

SYCL/Assert/assert_in_simultaneous_kernels.cpp

@@ -16,11 +16,11 @@
 // RUN: %ACC_RUN_PLACEHOLDER %t.out &> %t.txt
 // RUN: %ACC_RUN_PLACEHOLDER FileCheck %s --check-prefix=CHECK-ACC --input-file %t.txt
 //
-// CHECK:      {{.*}}assert_in_simultaneous_kernels.hpp:12: void assertFunc(): global id: [9,7,0], local id: [0,0,0]
+// CHECK:      {{.*}}assert_in_simultaneous_kernels.hpp:13: void assertFunc(): global id: [9,7,0], local id: [0,0,0]
 // CHECK-SAME: Assertion `false && "from assert statement"` failed.
 // CHECK-NOT:  The test ended.
 //
-// CHECK-ACC-NOT: {{.*}}assert_in_simultaneous_kernels.hpp:12: void assertFunc(): global id: [9,7,0], local id: [0,0,0]
+// CHECK-ACC-NOT: {{.*}}assert_in_simultaneous_kernels.hpp:13: void assertFunc(): global id: [9,7,0], local id: [0,0,0]
 // CHECK-ACC: The test ended.
 
 #include "assert_in_simultaneous_kernels.hpp"

SYCL/Assert/assert_in_simultaneous_kernels.hpp

@@ -1,5 +1,6 @@
 #include <CL/sycl.hpp>
 #include <cassert>
+#include <cstdio>
 #include <iostream>
 #include <thread>
 
@@ -44,6 +45,15 @@ void runTestForTid(queue *Q, size_t Tid) {
 }
 
 int main(int Argc, const char *Argv[]) {
+  // On windows stderr output becomes messed up if several thread
+  // output simultaneously. Hence, setting explicit line buffering here.
+#ifndef __SYCL_DEVICE_ONLY__
+  if (setvbuf(stderr, nullptr, _IOLBF, BUFSIZ)) {
+    std::cerr << "Can't set line-buffering mode fo stderr\n";
+    return 1;
+  }
+#endif
+
   std::vector<std::thread> threadPool;
   threadPool.reserve(NUM_THREADS);
 

SYCL/Assert/assert_in_simultaneous_kernels_win.cpp

@@ -17,11 +17,11 @@
 //
 // FIXME Windows version prints '(null)' instead of '<unknown func>' once in a
 // while for some insane reason.
-// CHECK:      {{.*}}assert_in_simultaneous_kernels.hpp:12: {{<unknown func>|(null)}}: global id: [9,7,0], local id: [0,0,0]
+// CHECK:      {{.*}}assert_in_simultaneous_kernels.hpp:13: {{<unknown func>|(null)}}: global id: [9,7,0], local id: [0,0,0]
 // CHECK-SAME: Assertion `false && "from assert statement"` failed.
 // CHECK-NOT:  The test ended.
 //
-// CHECK-ACC-NOT: {{.*}}assert_in_simultaneous_kernels.hpp:12: {{<unknown func>|(null)}}: global id: [9,7,0], local id: [0,0,0]
+// CHECK-ACC-NOT: {{.*}}assert_in_simultaneous_kernels.hpp:13: {{<unknown func>|(null)}}: global id: [9,7,0], local id: [0,0,0]
 // CHECK-ACC:  The test ended.
 
 #include "assert_in_simultaneous_kernels.hpp"

SYCL/Assert/assert_in_simultaneously_multiple_tus.cpp

@@ -24,6 +24,7 @@
 
 #include "Inputs/kernels_in_file2.hpp"
 #include <CL/sycl.hpp>
+#include <cstdio>
 #include <iostream>
 #include <thread>
 
@@ -82,6 +83,15 @@ void runTestForTid(queue *Q, size_t Tid) {
 }
 
 int main(int Argc, const char *Argv[]) {
+#ifndef __SYCL_DEVICE_ONLY__
+  // On windows stderr output becomes messed up if several thread
+  // output simultaneously. Hence, setting explicit line buffering here.
+  if (setvbuf(stderr, nullptr, _IOLBF, BUFSIZ)) {
+    std::cerr << "Can't set line-buffering mode fo stderr\n";
+    return 1;
+  }
+#endif
+
   std::vector<std::thread> threadPool;
   threadPool.reserve(NUM_THREADS);