diff --git a/src/plugins/clangtools/clangtoolruncontrol.cpp b/src/plugins/clangtools/clangtoolruncontrol.cpp
index 39de004ac89..aaf20741a7f 100644
--- a/src/plugins/clangtools/clangtoolruncontrol.cpp
+++ b/src/plugins/clangtools/clangtoolruncontrol.cpp
@@ -242,26 +242,15 @@ void ClangToolRunWorker::onDone(const AnalyzeOutputData &output)
 
     qCDebug(LOG) << "onRunnerFinishedWithSuccess:" << output.outputFilePath;
 
-    QString errorMessage;
-    const Diagnostics diagnostics = m_tool->read(output.outputFilePath, m_projectFiles,
-                                                 &errorMessage);
+    const Diagnostics diagnostics = output.diagnostics;
 
-    if (!errorMessage.isEmpty()) {
-        m_filesAnalyzed.remove(output.fileToAnalyze);
-        m_filesNotAnalyzed.insert(output.fileToAnalyze);
-        qCDebug(LOG) << "onRunnerFinishedWithSuccess: Error reading log file:" << errorMessage;
-        appendMessage(Tr::tr("Failed to analyze \"%1\": %2")
-                        .arg(output.fileToAnalyze.toUserOutput(), errorMessage),
-                      Utils::StdErrFormat);
-    } else {
-        if (!m_filesNotAnalyzed.contains(output.fileToAnalyze))
-            m_filesAnalyzed.insert(output.fileToAnalyze);
-        if (!diagnostics.isEmpty()) {
-            // do not generate marks when we always analyze open files since marks from that
-            // analysis should be more up to date
-            const bool generateMarks = !m_runSettings.analyzeOpenFiles();
-            m_tool->onNewDiagnosticsAvailable(diagnostics, generateMarks);
-        }
+    if (!m_filesNotAnalyzed.contains(output.fileToAnalyze))
+        m_filesAnalyzed.insert(output.fileToAnalyze);
+    if (!diagnostics.isEmpty()) {
+        // do not generate marks when we always analyze open files since marks from that
+        // analysis should be more up to date
+        const bool generateMarks = !m_runSettings.analyzeOpenFiles();
+        m_tool->onNewDiagnosticsAvailable(diagnostics, generateMarks);
     }
 }
 
diff --git a/src/plugins/clangtools/clangtoolrunner.cpp b/src/plugins/clangtools/clangtoolrunner.cpp
index 6681a9133dd..01b71fefe2f 100644
--- a/src/plugins/clangtools/clangtoolrunner.cpp
+++ b/src/plugins/clangtools/clangtoolrunner.cpp
@@ -3,6 +3,7 @@
 
 #include "clangtoolrunner.h"
 
+#include "clangtoolslogfilereader.h"
 #include "clangtoolstr.h"
 #include "clangtoolsutils.h"
 
@@ -11,6 +12,9 @@
 #include <cppeditor/clangdiagnosticconfigsmodel.h>
 #include <cppeditor/cpptoolsreuse.h>
 
+#include <extensionsystem/pluginmanager.h>
+
+#include <utils/async.h>
 #include <utils/process.h>
 #include <utils/qtcassert.h>
 #include <utils/temporaryfile.h>
@@ -20,6 +24,7 @@
 #include <QFileInfo>
 #include <QLoggingCategory>
 
+
 static Q_LOGGING_CATEGORY(LOG, "qtc.clangtools.runner", QtWarningMsg)
 
 using namespace CppEditor;
@@ -109,6 +114,7 @@ GroupItem clangToolTask(const AnalyzeInputData &input,
         QString name;
         FilePath executable;
         FilePath outputFilePath;
+        QString errorMessage;
     };
     const TreeStorage<ClangToolStorage> storage;
 
@@ -160,9 +166,6 @@ GroupItem clangToolTask(const AnalyzeInputData &input,
     };
     const auto onProcessDone = [=](const Process &process) {
         qCDebug(LOG).noquote() << "Output:\n" << process.cleanedStdOut();
-        if (!outputHandler)
-            return;
-        outputHandler({true, input.unit.file, storage->outputFilePath, input.tool});
     };
     const auto onProcessError = [=](const Process &process) {
         if (!outputHandler)
@@ -179,15 +182,38 @@ GroupItem clangToolTask(const AnalyzeInputData &input,
             message = Tr::tr("%1 finished with exit code: %2.").arg(data.name).arg(process.exitCode());
         else
             message = Tr::tr("%1 crashed.").arg(data.name);
-        outputHandler({false, input.unit.file, data.outputFilePath, input.tool, message, details});
+        outputHandler(
+            {false, input.unit.file, data.outputFilePath, {}, input.tool, message, details});
+    };
+
+    const auto onReadSetup = [=](Async<Diagnostics> &data) {
+        data.setConcurrentCallData(&readExportedDiagnostics,
+                                   storage->outputFilePath,
+                                   input.diagnosticsFilter,
+                                   &storage->errorMessage);
+        data.setFutureSynchronizer(ExtensionSystem::PluginManager::futureSynchronizer());
+    };
+    const auto onReadDone = [=](const Async<Diagnostics> &data) {
+        if (!outputHandler)
+            return;
+        outputHandler(
+            {true, input.unit.file, storage->outputFilePath, data.result(), input.tool});
+    };
+    const auto onReadError = [=](const Async<Diagnostics> &) {
+        if (!outputHandler)
+            return;
+        outputHandler(
+            {false, input.unit.file, storage->outputFilePath, {}, input.tool, storage->errorMessage});
     };
 
     const Group group {
         Storage(storage),
         onGroupSetup(onSetup),
         Group {
+            sequential,
             finishAllAndDone,
-            ProcessTask(onProcessSetup, onProcessDone, onProcessError)
+            ProcessTask(onProcessSetup, onProcessDone, onProcessError),
+            AsyncTask<Diagnostics>(onReadSetup, onReadDone, onReadError)
         }
     };
     return group;
diff --git a/src/plugins/clangtools/clangtoolrunner.h b/src/plugins/clangtools/clangtoolrunner.h
index a8d1204c224..ab4039c92c8 100644
--- a/src/plugins/clangtools/clangtoolrunner.h
+++ b/src/plugins/clangtools/clangtoolrunner.h
@@ -4,6 +4,8 @@
 #pragma once
 
 #include "clangfileinfo.h"
+#include "clangtoolsdiagnostic.h"
+#include "clangtoolslogfilereader.h"
 #include "clangtoolssettings.h"
 
 #include <cppeditor/clangdiagnosticconfig.h>
@@ -35,6 +37,7 @@ struct AnalyzeInputData
     Utils::Environment environment;
     AnalyzeUnit unit;
     QString overlayFilePath = {};
+    AcceptDiagsFromFilePath diagnosticsFilter = {};
 };
 
 struct AnalyzeOutputData
@@ -42,6 +45,7 @@ struct AnalyzeOutputData
     bool success = true;
     Utils::FilePath fileToAnalyze;
     Utils::FilePath outputFilePath;
+    Diagnostics diagnostics;
     CppEditor::ClangToolType toolType;
     QString errorMessage = {};
     QString errorDetails = {};
diff --git a/src/plugins/clangtools/documentclangtoolrunner.cpp b/src/plugins/clangtools/documentclangtoolrunner.cpp
index 5640411e7cf..a84ea3706ff 100644
--- a/src/plugins/clangtools/documentclangtoolrunner.cpp
+++ b/src/plugins/clangtools/documentclangtoolrunner.cpp
@@ -201,8 +201,16 @@ void DocumentClangToolRunner::run()
         if (includeDir.isEmpty() || clangVersion.isEmpty())
             return;
         const AnalyzeUnit unit(m_fileInfo, includeDir, clangVersion);
-        const AnalyzeInputData input{tool, runSettings, config, m_temporaryDir.path(), env, unit,
-                                     vfso().overlayFilePath().toString()};
+        auto diagnosticFilter = [mappedPath = vfso().autoSavedFilePath(m_document)](
+                                    const FilePath &path) { return path == mappedPath; };
+        const AnalyzeInputData input{tool,
+                                     runSettings,
+                                     config,
+                                     m_temporaryDir.path(),
+                                     env,
+                                     unit,
+                                     vfso().overlayFilePath().toString(),
+                                     diagnosticFilter};
         const auto setupHandler = [this, executable] {
             return !m_document->isModified() || isVFSOverlaySupported(executable);
         };
@@ -234,11 +242,7 @@ void DocumentClangToolRunner::onDone(const AnalyzeOutputData &output)
         return;
     }
 
-    const FilePath mappedPath = vfso().autoSavedFilePath(m_document);
-    Diagnostics diagnostics = readExportedDiagnostics(
-        output.outputFilePath,
-        [&](const FilePath &path) { return path == mappedPath; });
-
+    Diagnostics diagnostics = output.diagnostics;
     for (Diagnostic &diag : diagnostics) {
         updateLocation(diag.location);
         for (ExplainingStep &explainingStep : diag.explainingSteps) {