Debugger: Implement 'show memory' feature for UVSC engine

This commit implements a possibility to open the memory viewer/editor
for the specified address.

Take into account that it is impossible to open a memory viewer/editor
for a specific local variable or a stack, because the UVSC engine
does not provide an addresses for a local variables.

Change-Id: Ib65a9f9ba2534283c7e3404bc66785767c926053
Reviewed-by: hjk <hjk@qt.io>

src/plugins/debugger/uvsc/uvscengine.cpp

@@ -217,7 +217,8 @@ bool UvscEngine::hasCapability(unsigned cap) const
                   | AddWatcherCapability
                   | WatchWidgetsCapability
                   | CreateFullBacktraceCapability
-                  | OperateByInstructionCapability);
+                  | OperateByInstructionCapability
+                  | ShowMemoryCapability);
 }
 
 void UvscEngine::setRegisterValue(const QString &name, const QString &value)
@@ -233,6 +234,7 @@ void UvscEngine::setRegisterValue(const QString &name, const QString &value)
     if (!m_client->setRegisterValue(registerIt->first, value))
         return;
     reloadRegisters();
+    updateMemoryViews();
 }
 
 void UvscEngine::setPeripheralRegisterValue(quint64 address, quint64 value)
@@ -241,6 +243,7 @@ void UvscEngine::setPeripheralRegisterValue(quint64 address, quint64 value)
     if (!m_client->changeMemory(address, data))
         return;
     reloadPeripheralRegisters();
+    updateMemoryViews();
 }
 
 void UvscEngine::executeStepOver(bool byInstruction)
@@ -473,6 +476,24 @@ void UvscEngine::fetchDisassembler(DisassemblerAgent *agent)
     }
 }
 
+void UvscEngine::changeMemory(MemoryAgent *agent, quint64 address, const QByteArray &data)
+{
+    QTC_ASSERT(!data.isEmpty(), return);
+    if (!m_client->changeMemory(address, data))
+        showMessage(tr("UVSC: Changing memory at address 0x%1 failed.").arg(address, 0, 16), LogMisc);
+    else
+        handleChangeMemory(agent, address, data);
+}
+
+void UvscEngine::fetchMemory(MemoryAgent *agent, quint64 address, quint64 length)
+{
+    QByteArray data(int(length), 0);
+    if (!m_client->fetchMemory(address, data))
+        showMessage(tr("UVSC: Fetching memory at address 0x%1 failed.").arg(address, 0, 16), LogMisc);
+
+    handleFetchMemory(agent, address, data);
+}
+
 void UvscEngine::reloadRegisters()
 {
     if (!isRegistersWindowVisible())
@@ -866,5 +887,21 @@ void UvscEngine::handleStoppingFailure(const QString &errorMessage)
     notifyInferiorStopFailed();
 }
 
+void UvscEngine::handleFetchMemory(MemoryAgent *agent, quint64 address, const QByteArray &data)
+{
+    agent->addData(address, data);
+}
+
+void UvscEngine::handleChangeMemory(MemoryAgent *agent, quint64 address, const QByteArray &data)
+{
+    Q_UNUSED(agent)
+    Q_UNUSED(address)
+    Q_UNUSED(data)
+
+    updateLocals();
+    reloadRegisters();
+    reloadPeripheralRegisters();
+}
+
 } // namespace Internal
 } // namespace Debugger

src/plugins/debugger/uvsc/uvscengine.h

@@ -72,6 +72,9 @@ public:
 
     void fetchDisassembler(DisassemblerAgent *agent) final;
 
+    void changeMemory(MemoryAgent *agent, quint64 address, const QByteArray &data) final;
+    void fetchMemory(MemoryAgent *agent, quint64 address, quint64 length) final;
+
     void reloadRegisters() final;
     void reloadPeripheralRegisters() final;
 
@@ -99,6 +102,9 @@ private slots:
     void handleExecutionFailure(const QString &errorMessage);
     void handleStoppingFailure(const QString &errorMessage);
 
+    void handleFetchMemory(MemoryAgent *agent, quint64 address, const QByteArray &data);
+    void handleChangeMemory(MemoryAgent *agent, quint64 address, const QByteArray &data);
+
 private:
     void doUpdateLocals(const UpdateParameters &params) final;
     void updateAll() final;