Add GDB JIT support for source line debug information.

Author: Dmitri-Botcharnikov

src/coreclr/hosts/inc/coreclrhost.h

@@ -46,5 +46,22 @@ CORECLR_HOSTING_API(coreclr_execute_assembly,
             unsigned int* exitCode);
 
 #undef CORECLR_HOSTING_API
-                      
+
+struct SequencePointInfo
+{
+    int lineNumber, ilOffset;
+    char16_t* fileName;
+};
+
+struct MethodDebugInfo
+{
+    SequencePointInfo* points;
+    int size;
+};
+
+typedef int (*GetInfoForMethodDelegate)(const char*, unsigned int, MethodDebugInfo& methodDebugInfo);
+extern GetInfoForMethodDelegate getInfoForMethodDelegate;
+
 #endif // __CORECLR_HOST_H__
+
+

src/coreclr/hosts/unixcoreruncommon/CMakeLists.txt

@@ -2,6 +2,10 @@ project(unixcoreruncommon)
 
 add_compile_options(-fPIC)
 
+if(FEATURE_GDBJIT)    
+   add_definitions(-DFEATURE_GDBJIT)
+endif(FEATURE_GDBJIT)
+
 _add_library(unixcoreruncommon
     STATIC
     coreruncommon.cpp

src/coreclr/hosts/unixcoreruncommon/coreruncommon.cpp

@@ -34,7 +34,7 @@
 // If set to 1, server GC is enabled on startup. If 0, server GC is
 // disabled. Server GC is off by default.
 static const char* serverGcVar = "CORECLR_SERVER_GC";
-
+GetInfoForMethodDelegate getInfoForMethodDelegate = NULL;
 #if defined(__linux__)
 #define symlinkEntrypointExecutable "/proc/self/exe"
 #elif !defined(__APPLE__)
@@ -402,6 +402,24 @@ int ExecuteManagedAssembly(
             }
             else 
             {
+#ifdef FEATURE_GDBJIT                
+                coreclr_create_delegate_ptr CreateDelegate =
+                (coreclr_create_delegate_ptr)dlsym(coreclrLib,
+                                           "coreclr_create_delegate");
+
+                // st = CreateDelegate(hostHandle, domainId, "System.Diagnostics.Debug.SymbolReader",
+                //           "System.Diagnostics.Debug.SymbolReader.SymbolReader", "GetLineByILOffset",
+                //           (void **)&getLineByILOffsetDelegate);
+                st = CreateDelegate(hostHandle, domainId, "System.Diagnostics.Debug.SymbolReader",
+                          "System.Diagnostics.Debug.SymbolReader.SymbolReader", "GetInfoForMethod",
+                          (void **)&getInfoForMethodDelegate);
+
+                if (!SUCCEEDED(st))
+                {
+                    fprintf(stderr, "coreclr_create_delegate failed - status: 0x%08x\n", st);
+                    exitCode = -1;
+                }
+#endif // FEATURE_GDBJIT                
                 st = executeAssembly(
                         hostHandle,
                         domainId,

src/vm/CMakeLists.txt

@@ -27,6 +27,17 @@ if(CLR_CMAKE_PLATFORM_UNIX)
     add_compile_options(-fPIC)
 endif(CLR_CMAKE_PLATFORM_UNIX)
 
+if(FEATURE_GDBJIT)
+    set(VM_SOURCES_GDBJIT
+    ../gc/gccommon.cpp
+    ../gc/gcscan.cpp
+    ../gc/gcsvr.cpp
+    ../gc/gcwks.cpp
+    gdbjit.cpp
+    )
+   add_definitions(-DFEATURE_GDBJIT)
+endif(FEATURE_GDBJIT)    
+
 set(VM_SOURCES_DAC_AND_WKS_COMMON
     appdomain.cpp
     array.cpp
@@ -109,6 +120,7 @@ set(VM_SOURCES_DAC_AND_WKS_COMMON
     virtualcallstub.cpp
     win32threadpool.cpp
     zapsig.cpp
+    ${VM_SOURCES_GDBJIT}
 )
 
 if(FEATURE_READYTORUN)