DBG: implement symunload command

Author: mrexodia

src/dbg/commands/cmd-analysis.cpp

@@ -226,6 +226,31 @@ bool cbDebugLoadSymbol(int argc, char* argv[])
     return true;
 }
 
+bool cbDebugUnloadSymbol(int argc, char* argv[])
+{
+    if(IsArgumentsLessThan(argc, 2))
+        return false;
+    //get some module information
+    duint modbase = ModBaseFromName(argv[1]);
+    if(!modbase)
+    {
+        dprintf(QT_TRANSLATE_NOOP("DBG", "Invalid module \"%s\"!\n"), argv[1]);
+        return false;
+    }
+    EXCLUSIVE_ACQUIRE(LockModules);
+    auto info = ModInfoFromAddr(modbase);
+    if(!info)
+    {
+        // TODO: this really isn't supposed to happen, but could if the module is suddenly unloaded
+        dputs("module not found...");
+        return false;
+    }
+    info->unloadSymbols();
+    GuiRepaintTableView();
+    dputs(QT_TRANSLATE_NOOP("DBG", "Done!"));
+    return true;
+}
+
 bool cbInstrImageinfo(int argc, char* argv[])
 {
     duint address;

src/dbg/commands/cmd-analysis.h

@@ -13,6 +13,7 @@ bool cbInstrAnalyseadv(int argc, char* argv[]);
 bool cbInstrVirtualmod(int argc, char* argv[]);
 bool cbDebugDownloadSymbol(int argc, char* argv[]);
 bool cbDebugLoadSymbol(int argc, char* argv[]);
+bool cbDebugUnloadSymbol(int argc, char* argv[]);
 bool cbInstrImageinfo(int argc, char* argv[]);
 bool cbInstrGetRelocSize(int argc, char* argv[]);
 bool cbInstrExhandlers(int argc, char* argv[]);

src/dbg/x64dbg.cpp

@@ -325,6 +325,7 @@ static void registercommands()
     dbgcmdnew("virtualmod", cbInstrVirtualmod, true); //virtual module
     dbgcmdnew("symdownload,downloadsym", cbDebugDownloadSymbol, true); //download symbols
     dbgcmdnew("symload,loadsym", cbDebugLoadSymbol, true); //load symbols
+    dbgcmdnew("symunload,unloadsym", cbDebugUnloadSymbol, true); //unload symbols
     dbgcmdnew("imageinfo,modimageinfo", cbInstrImageinfo, true); //print module image information
     dbgcmdnew("GetRelocSize,grs", cbInstrGetRelocSize, true); //get relocation table size
     dbgcmdnew("exhandlers", cbInstrExhandlers, true); //enumerate exception handlers