Add a PcdEmulatorLazyLoadSymbols that allows non-lazy symbol loading. The problem with lazy symbol loading is it only happens after you hit a breakpoint. This means you can't add breakpoints from the GUI and have them hit, this requires symbols being loaded as modules load so the breakpoints can get resolved.

Added arguments to SecGdbScriptBreak() to enable lldb python symbol load/unload script. 

signed-off-by:andrewfish



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12879 6f19259b-4bc3-4df7-8a09-765794883524

3 files changed, 83 insertions, 27 deletions

diff --git a/EmulatorPkg/EmulatorPkg.dec b/EmulatorPkg/EmulatorPkg.dec
index f005c79..b3d461d 100644
--- a/EmulatorPkg/EmulatorPkg.dec
+++ b/EmulatorPkg/EmulatorPkg.dec
@@ -48,6 +48,10 @@
   gEmuVirtualDisksGuid       = { 0xf2ba331a, 0x8985, 0x11db, { 0xa4, 0x06, 0x00, 0x40, 0xd0, 0x2b, 0x18, 0x35 } }

   gEmuPhysicalDisksGuid      = { 0xf2bdcc96, 0x8985, 0x11db, { 0x87, 0x19, 0x00, 0x40, 0xd0, 0x2b, 0x18, 0x35 } }

 

+[PcdsFeatureFlag]

+  ## If TRUE, if symbols only load on breakpoints and gdb entry

+  gEmulatorPkgTokenSpaceGuid.PcdEmulatorLazyLoadSymbols|TRUE|BOOLEAN|0x00020000

+

 [PcdsFixedAtBuild]

   gEmulatorPkgTokenSpaceGuid.PcdEmuFlashNvStorageVariableBase|0x0|UINT64|0x00001014

   gEmulatorPkgTokenSpaceGuid.PcdEmuFlashNvStorageFtwSpareBase|0x0|UINT64|0x00001015

diff --git a/EmulatorPkg/Unix/Host/Host.c b/EmulatorPkg/Unix/Host/Host.c
index 1713016..8e1272d 100644
--- a/EmulatorPkg/Unix/Host/Host.c
+++ b/EmulatorPkg/Unix/Host/Host.c
@@ -1113,6 +1113,18 @@ DlLoadImage (
 }
 
 
+VOID
+SecGdbScriptBreak (
+  char                *FileName,
+  int                 FileNameLength,
+  long unsigned int   LoadAddress,
+  int                 AddSymbolFlag
+  )
+{
+  return;
+}
+
+
 /**
   Adds the image to a gdb script so it's symbols can be loaded.
   The AddFirmwareSymbolFile helper macro is used.
@@ -1130,20 +1142,41 @@ GdbScriptAddImage (
 
   if (ImageContext->PdbPointer != NULL && !IsPdbFile (ImageContext->PdbPointer)) {
     FILE  *GdbTempFile;
-    GdbTempFile = fopen (gGdbWorkingFileName, "a");
-    if (GdbTempFile != NULL) {
-      long unsigned int SymbolsAddr = (long unsigned int)(ImageContext->ImageAddress + ImageContext->SizeOfHeaders);
-      mScriptSymbolChangesCount++;
-      fprintf (
-        GdbTempFile,
-        "AddFirmwareSymbolFile 0x%x %s 0x%08lx\n",
-        mScriptSymbolChangesCount,
-        ImageContext->PdbPointer,
-        SymbolsAddr
-        );
-      fclose (GdbTempFile);
+    if (FeaturePcdGet (PcdEmulatorLazyLoadSymbols)) {    
+      GdbTempFile = fopen (gGdbWorkingFileName, "a");
+      if (GdbTempFile != NULL) {
+        long unsigned int SymbolsAddr = (long unsigned int)(ImageContext->ImageAddress + ImageContext->SizeOfHeaders);
+        mScriptSymbolChangesCount++;
+        fprintf (
+          GdbTempFile,
+          "AddFirmwareSymbolFile 0x%x %s 0x%08lx\n",
+          mScriptSymbolChangesCount,
+          ImageContext->PdbPointer,
+          SymbolsAddr
+          );
+        fclose (GdbTempFile);
+      } else {
+        ASSERT (FALSE);
+      }
     } else {
-      ASSERT (FALSE);
+      GdbTempFile = fopen (gGdbWorkingFileName, "w");
+      if (GdbTempFile != NULL) {
+        fprintf (
+          GdbTempFile, 
+          "add-symbol-file %s 0x%08lx\n", 
+          ImageContext->PdbPointer, 
+          (long unsigned int)(ImageContext->ImageAddress + ImageContext->SizeOfHeaders)
+          );
+        fclose (GdbTempFile);
+  
+        //
+        // Target for gdb breakpoint in a script that uses gGdbWorkingFileName to set a breakpoint.
+        // Hey what can you say scripting in gdb is not that great....
+        //
+        SecGdbScriptBreak (ImageContext->PdbPointer, strlen (ImageContext->PdbPointer), (long unsigned int)(ImageContext->ImageAddress + ImageContext->SizeOfHeaders), 1);
+      } else {
+        ASSERT (FALSE);
+      }
     }
   }
 }
@@ -1182,21 +1215,37 @@ GdbScriptRemoveImage (
     return;
   }
 
-  //
-  // Write the file we need for the gdb script
-  //
-  GdbTempFile = fopen (gGdbWorkingFileName, "a");
-  if (GdbTempFile != NULL) {
-    mScriptSymbolChangesCount++;
-    fprintf (
-      GdbTempFile,
-      "RemoveFirmwareSymbolFile 0x%x %s\n",
-      mScriptSymbolChangesCount,
-      ImageContext->PdbPointer
-      );
-    fclose (GdbTempFile);
+  if (FeaturePcdGet (PcdEmulatorLazyLoadSymbols)) {    
+    //
+    // Write the file we need for the gdb script
+    //
+    GdbTempFile = fopen (gGdbWorkingFileName, "a");
+    if (GdbTempFile != NULL) {
+      mScriptSymbolChangesCount++;
+      fprintf (
+        GdbTempFile,
+        "RemoveFirmwareSymbolFile 0x%x %s\n",
+        mScriptSymbolChangesCount,
+        ImageContext->PdbPointer
+        );
+      fclose (GdbTempFile);
+    } else {
+      ASSERT (FALSE);
+    }
   } else {
-    ASSERT (FALSE);
+    GdbTempFile = fopen (gGdbWorkingFileName, "w");
+    if (GdbTempFile != NULL) {
+      fprintf (GdbTempFile, "remove-symbol-file %s\n", ImageContext->PdbPointer);
+      fclose (GdbTempFile);
+
+      //
+      // Target for gdb breakpoint in a script that uses gGdbWorkingFileName to set a breakpoint.
+      // Hey what can you say scripting in gdb is not that great....
+      //
+      SecGdbScriptBreak (ImageContext->PdbPointer, strlen (ImageContext->PdbPointer), 0, 0);
+    } else {
+      ASSERT (FALSE);
+    }  
   }
 }
 
diff --git a/EmulatorPkg/Unix/Host/Host.inf b/EmulatorPkg/Unix/Host/Host.inf
index 018ed86..496bd77 100644
--- a/EmulatorPkg/Unix/Host/Host.inf
+++ b/EmulatorPkg/Unix/Host/Host.inf
@@ -111,6 +111,9 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize

   gEmulatorPkgTokenSpaceGuid.PcdPeiServicesTablePage

 

+[FeaturePcd]

+  gEmulatorPkgTokenSpaceGuid.PcdEmulatorLazyLoadSymbols

+

 

 [BuildOptions]

    GCC:*_*_IA32_DLINK_FLAGS == -o $(BIN_DIR)/Host -m elf_i386 -dynamic-linker $(HOST_DLINK_PATHS) -L/usr/X11R6/lib -lXext -lX11