Various fixes for generation aware analysis (#70764)

src/coreclr/inc/stresslog.h

@@ -259,6 +259,8 @@
 #define STRESS_LOG_GC_STACK
 #endif //_DEBUG
 
+void AppendPid(LPCWSTR logFilename, LPWSTR fileName, size_t fileNameLength);
+
 class ThreadStressLog;
 
 struct StressLogMsg;

src/coreclr/utilcode/stresslog.cpp

@@ -143,38 +143,42 @@ void StressLog::Leave(CRITSEC_COOKIE) {
     DecCantAllocCount();
 }
 
-#ifdef MEMORY_MAPPED_STRESSLOG
-static LPVOID CreateMemoryMappedFile(LPWSTR logFilename, size_t maxBytesTotal)
+void AppendPid(LPCWSTR logFilename, LPWSTR fileName, size_t fileNameLength)
 {
-    if (maxBytesTotal < sizeof(StressLog::StressLogHeader))
-    {
-        return nullptr;
-    }
-    WCHAR fileName[MAX_PATH];
-
     // if the string "{pid}" occurs in the logFilename,
     // replace it by the PID of our process
     // only the first occurrence will be replaced
     const WCHAR* pidLit =  W("{pid}");
-    WCHAR* pidPtr = wcsstr(logFilename, pidLit);
+    const WCHAR* pidPtr = wcsstr(logFilename, pidLit);
     if (pidPtr != nullptr)
     {
         // copy the file name up to the "{pid}" occurrence
         ptrdiff_t pidInx = pidPtr - logFilename;
-        wcsncpy_s(fileName, MAX_PATH, logFilename, pidInx);
+        wcsncpy_s(fileName, fileNameLength, logFilename, pidInx);
 
         // append the string representation of the PID
         DWORD pid = GetCurrentProcessId();
         WCHAR pidStr[20];
         _itow_s(pid, pidStr, ARRAY_SIZE(pidStr), 10);
-        wcscat_s(fileName, MAX_PATH, pidStr);
+        wcscat_s(fileName, fileNameLength, pidStr);
 
         // append the rest of the filename
-        wcscat_s(fileName, MAX_PATH, logFilename + pidInx + wcslen(pidLit));
+        wcscat_s(fileName, fileNameLength, logFilename + pidInx + wcslen(pidLit));
+    }
+}
 
-        logFilename = fileName;
+#ifdef MEMORY_MAPPED_STRESSLOG
+static LPVOID CreateMemoryMappedFile(LPWSTR logFilename, size_t maxBytesTotal)
+{
+    if (maxBytesTotal < sizeof(StressLog::StressLogHeader))
+    {
+        return nullptr;
     }
-    HandleHolder hFile = WszCreateFile(logFilename,
+
+    WCHAR fileName[MAX_PATH];
+    AppendPid(logFilename, fileName, MAX_PATH);
+
+    HandleHolder hFile = WszCreateFile(fileName,
         GENERIC_READ | GENERIC_WRITE,
         FILE_SHARE_READ,
         NULL,                 // default security descriptor

src/coreclr/vm/ceemain.cpp

@@ -673,7 +673,6 @@ void EEStartupHelper()
         // Initialize the event pipe.
         EventPipeAdapter::Initialize();
 #endif // FEATURE_PERFTRACING
-        GenAnalysis::Initialize();
 
 #ifdef TARGET_UNIX
         PAL_SetShutdownCallback(EESocketCleanupHelper);
@@ -899,6 +898,7 @@ void EEStartupHelper()
         // EventPipe initialization, so this is done after the GC has been fully initialized.
         EventPipeAdapter::FinishInitialize();
 #endif // FEATURE_PERFTRACING
+        GenAnalysis::Initialize();
 
         // This isn't done as part of InitializeGarbageCollector() above because thread
         // creation requires AppDomains to have been set up.

src/coreclr/vm/finalizerthread.cpp

@@ -281,8 +281,11 @@ VOID FinalizerThread::FinalizerThreadWorker(void *args)
                 GenAnalysis::EnableGenerationalAwareSession();
 #endif
             }
+
             // Writing an empty file to indicate completion
-            fclose(fopen(GENAWARE_COMPLETION_FILE_NAME,"w+"));
+            WCHAR outputPath[MAX_PATH];
+            AppendPid(GENAWARE_COMPLETION_FILE_NAME, outputPath, MAX_PATH);
+            fclose(_wfopen(outputPath, W("w+")));
         }
 
         if (!bPriorityBoosted)

src/coreclr/vm/gcenv.ee.cpp

@@ -1695,7 +1695,9 @@ void GCToEEInterface::AnalyzeSurvivorsFinished(size_t gcIndex, int condemnedGene
             {
                 EX_TRY
                 {
-                    GenerateDump (GENAWARE_DUMP_FILE_NAME, 2, GenerateDumpFlagsNone, nullptr, 0);
+                    WCHAR outputPath[MAX_PATH];
+                    AppendPid(GENAWARE_DUMP_FILE_NAME, outputPath, MAX_PATH);
+                    GenerateDump (outputPath, 2, GenerateDumpFlagsNone, nullptr, 0);
                 }
                 EX_CATCH {}
                 EX_END_CATCH(SwallowAllExceptions);

src/coreclr/vm/genanalysis.cpp

@@ -76,8 +76,9 @@ bool gcGenAnalysisDump = false;
 
 /* static */ void GenAnalysis::EnableGenerationalAwareSession()
 {
-    LPCWSTR outputPath = nullptr;
-    outputPath = GENAWARE_TRACE_FILE_NAME;
+    WCHAR outputPath[MAX_PATH];
+    AppendPid(GENAWARE_TRACE_FILE_NAME, outputPath, MAX_PATH);
+
     NewArrayHolder<COR_PRF_EVENTPIPE_PROVIDER_CONFIG> pProviders;
     int providerCnt = 1;
     pProviders = new COR_PRF_EVENTPIPE_PROVIDER_CONFIG[providerCnt];
@@ -110,4 +111,8 @@ bool gcGenAnalysisDump = false;
         EventPipeAdapter::StartStreaming(gcGenAnalysisEventPipeSessionId);
         gcGenAnalysisState = GcGenAnalysisState::Enabled;
     }
+    else
+    {
+        gcGenAnalysisTrace = false;
+    }
 }

src/coreclr/vm/genanalysis.h

@@ -18,9 +18,9 @@ enum GcGenAnalysisState
     Done = 3,
 };
 
-#define GENAWARE_TRACE_FILE_NAME W("gcgenaware.nettrace")
-#define GENAWARE_DUMP_FILE_NAME W("gcgenaware.dmp")
-#define GENAWARE_COMPLETION_FILE_NAME "gcgenaware.nettrace.completed"
+#define GENAWARE_TRACE_FILE_NAME W("gcgenaware.{pid}.nettrace")
+#define GENAWARE_DUMP_FILE_NAME W("gcgenaware.{pid}.dmp")
+#define GENAWARE_COMPLETION_FILE_NAME W("gcgenaware.{pid}.nettrace.completed")
 
 extern bool s_forcedGCInProgress;
 extern GcGenAnalysisState gcGenAnalysisState;

src/native/eventpipe/ep-session.c

@@ -180,6 +180,7 @@ ep_session_alloc (
 	case EP_SESSION_TYPE_FILESTREAM :
 		if (output_path) {
 			file_stream_writer = ep_file_stream_writer_alloc (output_path);
+			ep_raise_error_if_nok (file_stream_writer != NULL);
 			instance->file = ep_file_alloc (ep_file_stream_writer_get_stream_writer_ref (file_stream_writer), format);
 			ep_raise_error_if_nok (instance->file != NULL);
 			file_stream_writer = NULL;