Enable offline generation of text-based symbol tables for native images. This is needed in order to profile applications on Linux using perf_event.

This change also modifies the runtime to emit a perfmap entry when a native image is loaded so that offline trace processing tools can identify when a perfmap file for a native image is needed and generate it.

1 files changed, 41 insertions, 8 deletions

diff --git a/src/vm/perfmap.h b/src/vm/perfmap.h
index e0539150fc..f35084d4c4 100644
--- a/src/vm/perfmap.h
+++ b/src/vm/perfmap.h
@@ -11,6 +11,7 @@
 #include "sstring.h"
 #include "fstream.h"
 
+// Generates a perfmap file.
 class PerfMap
 {
 private:
@@ -23,27 +24,59 @@ private:
     // Set to true if an error is encountered when writing to the file.
     bool m_ErrorEncountered;
 
-    // Construct a new map.
+    // Construct a new map for the specified pid.
     PerfMap(int pid);
 
+    // Write a line to the map file.
+    void WriteLine(SString & line);
+
+protected:
+    // Construct a new map without a specified file name.
+    // Used for offline creation of NGEN map files.
+    PerfMap();
+
     // Clean-up resources.
     ~PerfMap();
 
-    // Does the actual work to log to the map.
-    void Log(MethodDesc * pMethod, PCODE pCode, size_t codeSize);
+    // Open the perf map file for write.
+    void OpenFile(SString& path);
+
+    // Does the actual work to log a method to the map.
+    void LogMethod(MethodDesc * pMethod, PCODE pCode, size_t codeSize);
+
+    // Does the actual work to log a native image load to the map.
+    void LogNativeImage(PEFile * pFile);
 
-    // Does the actual work to close and flush the map.
-    void Close();
+    // Get the native image signature and store it as a string.
+    static void GetNativeImageSignature(PEFile * pFile, WCHAR * pwszSig, unsigned int nSigSize);
 
 public:
     // Initialize the map for the current process.
     static void Initialize();
 
-    // Log a method to the map.
-    static void LogMethod(MethodDesc * pMethod, PCODE pCode, size_t codeSize);
-   
+    // Log a native image load to the map.
+    static void LogNativeImageLoad(PEFile * pFile);
+
+    // Log a JIT compiled method to the map.
+    static void LogJITCompiledMethod(MethodDesc * pMethod, PCODE pCode, size_t codeSize);
+
     // Close the map and flush any remaining data.
     static void Destroy();
 };
 
+// Generates a perfmap file for a native image by running crossgen.
+class NativeImagePerfMap : PerfMap
+{
+private:
+    // Log a pre-compiled method to the map.
+    void LogPreCompiledMethod(MethodDesc * pMethod, PCODE pCode, SIZE_T baseAddr);
+
+public:
+    // Construct a new map for a native image.
+    NativeImagePerfMap(Assembly * pAssembly, BSTR pDestPath);
+
+    // Log method information for each module.
+    void LogDataForModule(Module * pModule);
+};
+
 #endif // PERFPID_H