fix(run): propagate sanitizer flags to runtime + improve double free diagnostics

- add useSan parameter to run_cmd_live_filtered_capture
- propagate --san / --ubsan from RunCommand → RunProcess
- inject ASAN_OPTIONS and UBSAN_OPTIONS at runtime
- ensure all call sites pass sanitizer flag correctly
- improve runtime double free detection pipeline

note: enables proper AddressSanitizer output for script mode

Author: GaspardKirira

include/vix/cli/commands/run/RunDetail.hpp

@@ -491,7 +491,8 @@ namespace vix::commands::RunCommand::detail
       const std::string &cmd,
       const std::string &spinnerLabel,
       bool passthroughRuntime,
-      int timeoutSec = 0);
+      int timeoutSec = 0,
+      bool useSan = false);
 
   /**
    * @brief Run a command and capture its output plus exit code.

src/commands/RunCommand.cpp

@@ -582,7 +582,8 @@ namespace
             testCmd,
             "",
             true,
-            0);
+            0,
+            false);
 
     const int testExit = tr.exitCode;
 
@@ -602,13 +603,15 @@ namespace
 
       if (!log.empty())
       {
+        const fs::path diagnosticPath = *testExe;
+
         handled = vix::cli::errors::RawLogDetectors::handleRuntimeCrash(
             log,
-            testExe->string(),
+            diagnosticPath,
             "Test crashed");
 
         if (!handled &&
-            vix::cli::errors::RawLogDetectors::handleKnownRunFailure(log, testExe->string()))
+            vix::cli::errors::RawLogDetectors::handleKnownRunFailure(log, diagnosticPath))
         {
           handled = true;
         }
@@ -667,7 +670,8 @@ namespace
             runCmd,
             "",
             true,
-            timeoutSec);
+            timeoutSec,
+            opt.enableSanitizers || opt.enableUbsanOnly);
 
     int runExit = rr.exitCode;
 
@@ -687,13 +691,15 @@ namespace
 
       if (!log.empty())
       {
+        const fs::path diagnosticPath = opt.singleCpp ? opt.cppFile : exePath;
+
         handled = vix::cli::errors::RawLogDetectors::handleRuntimeCrash(
             log,
-            exePath,
+            diagnosticPath,
             failureContext);
 
         if (!handled &&
-            vix::cli::errors::RawLogDetectors::handleKnownRunFailure(log, exePath))
+            vix::cli::errors::RawLogDetectors::handleKnownRunFailure(log, diagnosticPath))
         {
           handled = true;
         }
@@ -791,7 +797,8 @@ namespace
           cmd,
           "",
           false,
-          0);
+          0,
+          false);
 
       const int code = cr.exitCode;
       if (code != 0)
@@ -1000,7 +1007,8 @@ namespace
           oss.str(),
           "",
           false,
-          0);
+          0,
+          false);
 
       const int code = cr.exitCode;
       if (code != 0)

src/commands/run/RunProcess.cpp

@@ -946,7 +946,7 @@ namespace vix::commands::RunCommand::detail
         ::kill(pid, sig);
     }
 
-    void child_exec_shell(const std::string &cmd, int masterFd, int slaveFd)
+    void child_exec_shell(const std::string &cmd, int masterFd, int slaveFd, bool useSan)
     {
       struct sigaction saChild{};
       saChild.sa_handler = SIG_DFL;
@@ -956,20 +956,24 @@ namespace vix::commands::RunCommand::detail
 
       ::setsid();
 
-      ::setenv("ASAN_OPTIONS",
-               "abort_on_error=1:"
-               "detect_leaks=1:"
-               "symbolize=1:"
-               "allocator_may_return_null=1:"
-               "fast_unwind_on_malloc=0:"
-               "strict_init_order=1:"
-               "check_initialization_order=1:"
-               "color=never",
-               1);
-
-      ::setenv("UBSAN_OPTIONS",
-               "halt_on_error=1:print_stacktrace=1:color=never",
-               1);
+      if (useSan)
+      {
+        ::setenv("ASAN_OPTIONS",
+                 "abort_on_error=1:"
+                 "halt_on_error=1:"
+                 "print_stacktrace=1:"
+                 "detect_leaks=1:"
+                 "symbolize=1:"
+                 "fast_unwind_on_malloc=0:"
+                 "strict_init_order=1:"
+                 "check_initialization_order=1:"
+                 "color=never",
+                 1);
+
+        ::setenv("UBSAN_OPTIONS",
+                 "halt_on_error=1:print_stacktrace=1:color=never",
+                 1);
+      }
 
       ::close(masterFd);
 
@@ -1057,7 +1061,8 @@ namespace vix::commands::RunCommand::detail
       const std::string &cmd,
       const std::string &spinnerLabel,
       bool passthroughRuntime,
-      int timeoutSec)
+      int timeoutSec,
+      bool useSan)
   {
     SigintGuard sigGuard;
     LiveRunResult result;
@@ -1081,7 +1086,7 @@ namespace vix::commands::RunCommand::detail
     }
 
     if (pid == 0)
-      child_exec_shell(cmd, pty.masterFd, pty.slaveFd);
+      child_exec_shell(cmd, pty.masterFd, pty.slaveFd, useSan);
 
     close_safe(pty.slaveFd);
     ::setpgid(pid, pid);
@@ -1339,7 +1344,8 @@ namespace vix::commands::RunCommand::detail
         cmd,
         spinnerLabel,
         false,
-        0);
+        0,
+        false);
     return r.exitCode;
 #endif
   }

src/commands/run/RunScript.cpp

@@ -633,7 +633,8 @@ namespace vix::commands::RunCommand::detail
           cmdRun,
           "",
           isPlainScript,
-          effective_timeout_sec(opt));
+          effective_timeout_sec(opt),
+          opt.enableSanitizers || opt.enableUbsanOnly);
 
       int runCode = normalize_exit_code(rr.exitCode);
 
@@ -748,7 +749,8 @@ namespace vix::commands::RunCommand::detail
           cmdRun,
           "",
           true,
-          effective_timeout_sec(opt));
+          effective_timeout_sec(opt),
+          opt.enableSanitizers || opt.enableUbsanOnly);
 
       int runCode = normalize_exit_code(rr.exitCode);
 
@@ -834,7 +836,8 @@ namespace vix::commands::RunCommand::detail
               directPlan.compileCmd,
               "Compiling script...",
               false,
-              0);
+              0,
+              o.enableSanitizers || o.enableUbsanOnly);
 
           if (build.exitCode != 0)
           {

src/commands/run/detail/DirectScriptRunner.cpp

@@ -434,7 +434,8 @@ namespace vix::commands::RunCommand::detail
           plan.compileCmd,
           "Compiling script...",
           false,
-          0);
+          0,
+          opt.enableSanitizers || opt.enableUbsanOnly);
 
       if (build.exitCode != 0)
       {
@@ -459,7 +460,8 @@ namespace vix::commands::RunCommand::detail
         plan.runCmd,
         "Running script...",
         plan.passthroughRuntime,
-        plan.effectiveTimeoutSec);
+        plan.effectiveTimeoutSec,
+        opt.enableSanitizers || opt.enableUbsanOnly);
 
     handle_runtime_exit_code(run.exitCode, "run", run.failureHandled);
     return run.exitCode;