From fcb156388d88eb6c0949890fde6d0efe19f00deb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bi=C8=99oc=20George?= <fraizeraust99@gmail.com>
Date: Thu, 26 Mar 2020 12:11:29 +0100
Subject: [PATCH] [NTDLL_APITEST] Add testcase for process priority class.
 CORE-16757

Currently the testcase function only addresses the behaviour of getting an
unaligned buffer (either of correct length size or not) for now.
---
 .../ntdll/NtQueryInformationProcess.c         | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/modules/rostests/apitests/ntdll/NtQueryInformationProcess.c b/modules/rostests/apitests/ntdll/NtQueryInformationProcess.c
index bdbfc3f726a..e392ead8760 100644
--- a/modules/rostests/apitests/ntdll/NtQueryInformationProcess.c
+++ b/modules/rostests/apitests/ntdll/NtQueryInformationProcess.c
@@ -185,6 +185,74 @@ Test_ProcessTimes(void)
 #undef SPIN_TIME
 }
 
+static
+void
+Test_ProcessPriorityClassAlignment(void)
+{
+    NTSTATUS Status;
+    PPROCESS_PRIORITY_CLASS ProcPriority;
+
+    /* Allocate some memory for the priority class structure */
+    ProcPriority = malloc(sizeof(PROCESS_PRIORITY_CLASS));
+    if (ProcPriority == NULL)
+    {
+        skip("Failed to allocate memory for PROCESS_PRIORITY_CLASS!\n");
+        return;
+    }
+
+    /*
+     * Initialize the PriorityClass member to ensure the test won't randomly succeed (if such data is uninitialized).
+     * Filling 85 to the data member makes sure that if the test fails continously then NtQueryInformationProcess()
+     * didn't initialize the structure with data.
+     */
+    RtlFillMemory(&ProcPriority->PriorityClass, sizeof(ProcPriority->PriorityClass), 0x55);
+
+    /* Unaligned buffer -- wrong size */
+    Status = NtQueryInformationProcess(NtCurrentProcess(),
+                                       ProcessPriorityClass,
+                                       (PVOID)1,
+                                       0,
+                                       NULL);
+    ok_hex(Status, STATUS_INFO_LENGTH_MISMATCH);
+
+    /* Unaligned buffer -- correct size */
+    Status = NtQueryInformationProcess(NtCurrentProcess(),
+                                       ProcessPriorityClass,
+                                       (PVOID)1,
+                                       sizeof(PROCESS_PRIORITY_CLASS),
+                                       NULL);
+    ok_hex(Status, STATUS_DATATYPE_MISALIGNMENT);
+
+    /* Unaligned buffer -- wrong size (but this time do with an alignment of 2) */
+    Status = NtQueryInformationProcess(NtCurrentProcess(),
+                                       ProcessPriorityClass,
+                                       (PVOID)2,
+                                       0,
+                                       NULL);
+    ok_hex(Status, STATUS_INFO_LENGTH_MISMATCH);
+
+    /* Unaligned buffer -- correct size (but this time do with an alignment of 2) */
+    Status = NtQueryInformationProcess(NtCurrentProcess(),
+                                       ProcessPriorityClass,
+                                       (PVOID)2,
+                                       sizeof(PROCESS_PRIORITY_CLASS),
+                                       NULL);
+    ok_hex(Status, STATUS_DATATYPE_MISALIGNMENT);
+
+    /* Do not care for the length but expect to return the priority class */
+    Status = NtQueryInformationProcess(NtCurrentProcess(),
+                                       ProcessPriorityClass,
+                                       ProcPriority,
+                                       sizeof(PROCESS_PRIORITY_CLASS),
+                                       NULL);
+    ok_hex(Status, STATUS_SUCCESS);
+
+    /* Make sure the returned priority class is a valid number (non negative) but also it should be within the PROCESS_PRIORITY_CLASS range */
+    ok(ProcPriority->PriorityClass > PROCESS_PRIORITY_CLASS_INVALID && ProcPriority->PriorityClass <= PROCESS_PRIORITY_CLASS_ABOVE_NORMAL,
+       "Expected a valid number from priority class range but got %d\n", ProcPriority->PriorityClass);
+    free(ProcPriority);
+}
+
 START_TEST(NtQueryInformationProcess)
 {
     NTSTATUS Status;
@@ -193,4 +261,5 @@ START_TEST(NtQueryInformationProcess)
     ok_hex(Status, STATUS_SUCCESS);
 
     Test_ProcessTimes();
+    Test_ProcessPriorityClassAlignment();
 }