1 files changed, 126 insertions, 0 deletions
diff --git a/src/vm/perfinfo.cpp b/src/vm/perfinfo.cpp
new file mode 100644
index 0000000000..3c8841b010
--- /dev/null
+++ b/src/vm/perfinfo.cpp
@@ -0,0 +1,126 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+// ===========================================================================
+// File: perfinfo.cpp
+//
+
+#include "common.h"
+
+#if defined(FEATURE_PERFMAP) && !defined(DACCESS_COMPILE)
+#include "perfinfo.h"
+#include "pal.h"
+
+PerfInfo::PerfInfo(int pid)
+  : m_Stream(nullptr)
+{
+    LIMITED_METHOD_CONTRACT;
+
+    SString tempPath;
+    if (!WszGetTempPath(tempPath))
+    {
+        return;
+    }
+
+    SString path;
+    path.Printf("%Sperfinfo-%d.map", tempPath.GetUnicode(), pid);
+    OpenFile(path);
+}
+
+// Logs image loads into the process' perfinfo-%d.map file
+void PerfInfo::LogImage(PEFile* pFile, WCHAR* guid)
+{
+    CONTRACTL
+    {
+        THROWS;
+        GC_NOTRIGGER;
+        MODE_PREEMPTIVE;
+        PRECONDITION(pFile != nullptr);
+        PRECONDITION(guid != nullptr);
+    } CONTRACTL_END;
+
+    SString value;
+    const SString& path = pFile->GetPath();
+    value.Printf("%S%c%S", path.GetUnicode(), sDelimiter, guid);
+
+    SString command;
+    command.Printf("%s", "ImageLoad");
+    WriteLine(command, value);
+
+}
+
+// Writes a command line, with "type" being the type of command, with "value" as the command's corresponding instructions/values. This is to be used to log specific information, e.g. LogImage
+void PerfInfo::WriteLine(SString& type, SString& value)
+{
+
+    CONTRACTL    
+    {
+        THROWS;
+        GC_NOTRIGGER;
+        MODE_PREEMPTIVE;
+    } CONTRACTL_END;
+
+    if (m_Stream == nullptr)
+    {
+        return;
+    }
+
+    SString line;
+    line.Printf("%S%c%S%c\n",
+            type.GetUnicode(), sDelimiter, value.GetUnicode(), sDelimiter);
+
+    EX_TRY
+    {
+        StackScratchBuffer scratch;
+        const char* strLine = line.GetANSI(scratch);
+        ULONG inCount = line.GetCount();
+        ULONG outCount;
+
+        m_Stream->Write(strLine, inCount, &outCount);
+
+        if (inCount != outCount)
+        {
+            // error encountered
+        }
+    }
+    EX_CATCH{} EX_END_CATCH(SwallowAllExceptions);
+}
+
+// Opens a file ready to be written in.
+void PerfInfo::OpenFile(SString& path)
+{
+    STANDARD_VM_CONTRACT;
+
+    m_Stream = new (nothrow) CFileStream();
+
+    if (m_Stream != nullptr)
+    {
+        HRESULT hr = m_Stream->OpenForWrite(path.GetUnicode());
+        if (FAILED(hr))
+        {
+            delete m_Stream;
+            m_Stream = nullptr;
+        }
+    }
+}
+
+PerfInfo::~PerfInfo()
+{
+    LIMITED_METHOD_CONTRACT;
+
+    delete m_Stream;
+    m_Stream = nullptr;
+}
+
+
+#endif
+
+
+
+
+
+
+
+
+
+