From bc5075c2c5da6d4b6895c51c101c64ee44bc6fc3 Mon Sep 17 00:00:00 2001
From: Sarbojit Sarkar <Sarbojit.Sarkar@amd.com>
Date: Thu, 11 Jun 2020 05:33:40 -0400
Subject: [PATCH] Added file logging for rocclr & HIP

Change-Id: Ic0a54f6ee82d010b011739e0059778ed31833518


[ROCm/clr commit: 5f055d227dd8e242275dc3bb3229088d265304ff]
---
 projects/clr/rocclr/utils/debug.cpp | 21 ++++++++++++++++++++-
 projects/clr/rocclr/utils/flags.hpp |  2 ++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/projects/clr/rocclr/utils/debug.cpp b/projects/clr/rocclr/utils/debug.cpp
index 20479c8572..5e126ac2cb 100644
--- a/projects/clr/rocclr/utils/debug.cpp
+++ b/projects/clr/rocclr/utils/debug.cpp
@@ -26,6 +26,7 @@
 #include "utils/flags.hpp"
 #endif
 
+#include <mutex>
 #include <cstdlib>
 #include <cstdio>
 #include <cstdarg>
@@ -80,6 +81,15 @@ void log_timestamped(LogLevel level, const char* file, int line, const char* mes
 #endif
 }
 
+FILE* g_pLogFile = nullptr;
+std::once_flag g_iLogFileInitialized;
+
+void createLogFile() {
+  if (!flagIsDefault(AMD_LOG_FILE) && g_pLogFile == nullptr) {
+    g_pLogFile = fopen("rocclr-trace.log", "w");
+  }
+}
+
 void log_printf(LogLevel level, const char* file, int line, const char* format, ...) {
   va_list ap;
 
@@ -88,7 +98,16 @@ void log_printf(LogLevel level, const char* file, int line, const char* format,
   vsnprintf(message, sizeof(message), format, ap);
   va_end(ap);
 
-  fprintf(stderr, ":%d:%-25s:%-4d: %010lld: %s\n", level, file, line, Os::timeNanos() / 100ULL, message);
+  if (!flagIsDefault(AMD_LOG_FILE)) {
+    std::call_once(amd::g_iLogFileInitialized, amd::createLogFile);
+
+    if (g_pLogFile) {
+      fprintf(g_pLogFile, ":%d:%-25s:%-4d: %010lld: %s\n", level, file, line, Os::timeNanos() / 100ULL, message);
+    }
+  }
+  else {
+    fprintf(stderr, ":%d:%-25s:%-4d: %010lld: %s\n", level, file, line, Os::timeNanos() / 100ULL, message);
+  }
 }
 
 }  // namespace amd
diff --git a/projects/clr/rocclr/utils/flags.hpp b/projects/clr/rocclr/utils/flags.hpp
index da982e8892..ca7e23ef4c 100644
--- a/projects/clr/rocclr/utils/flags.hpp
+++ b/projects/clr/rocclr/utils/flags.hpp
@@ -26,6 +26,8 @@
                                                                               \
 release(int, AMD_LOG_LEVEL, 0,                                                \
         "The default log level")                                              \
+release(bool, AMD_LOG_FILE, false,                                            \
+        "By default log file is disabled")                                    \
 release(uint, AMD_LOG_MASK, 0X7FFFFFFF,                                       \
         "The mask to enable specific kinds of logs")                          \
 debug(uint, DEBUG_GPU_FLAGS, 0,                                               \