From 2a6a082c934d2c011dc4a732883fc5bddc7a179e Mon Sep 17 00:00:00 2001
From: Bartosz Taudul <wolf@nereid.pl>
Date: Sat, 7 Oct 2023 01:00:59 +0200
Subject: [PATCH] Maintain a history of viewed symbols.

---
 server/TracySourceView.cpp | 15 ++++++++++++++-
 server/TracySourceView.hpp | 13 ++++++++++++-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/server/TracySourceView.cpp b/server/TracySourceView.cpp
index 2af1a170..c7dccd0f 100644
--- a/server/TracySourceView.cpp
+++ b/server/TracySourceView.cpp
@@ -606,7 +606,7 @@ void SourceView::OpenSource( const char* fileName, int line, const View& view, c
     assert( !m_source.empty() );
 }
 
-void SourceView::OpenSymbol( const char* fileName, int line, uint64_t baseAddr, uint64_t symAddr, Worker& worker, const View& view )
+void SourceView::OpenSymbol( const char* fileName, int line, uint64_t baseAddr, uint64_t symAddr, Worker& worker, const View& view, bool updateHistory )
 {
     m_targetLine = line;
     m_targetAddr = symAddr;
@@ -623,6 +623,19 @@ void SourceView::OpenSymbol( const char* fileName, int line, uint64_t baseAddr,
     SelectViewMode();
 
     if( !worker.GetInlineSymbolList( baseAddr, m_codeLen ) ) m_calcInlineStats = false;
+
+    if( updateHistory )
+    {
+        m_history.erase( m_history.begin() + m_historyCursor, m_history.end() );
+
+        History entry = { fileName, line, baseAddr, symAddr };
+        if( m_history.empty() || memcmp( &m_history.back(), &entry, sizeof( History ) ) != 0 )
+        {
+            m_history.emplace_back( entry );
+            if( m_history.size() > 100 ) m_history.erase( m_history.begin() );
+            m_historyCursor = m_history.size();
+        }
+    }
 }
 
 void SourceView::SelectViewMode()
diff --git a/server/TracySourceView.hpp b/server/TracySourceView.hpp
index faf828e5..66d2d3fe 100644
--- a/server/TracySourceView.hpp
+++ b/server/TracySourceView.hpp
@@ -153,6 +153,14 @@ private:
         unordered_flat_map<uint64_t, AddrStat> hwCountSrc, hwCountAsm;
     };
 
+    struct History
+    {
+        const char* fileName;
+        int64_t line;
+        uint64_t baseAddr;
+        uint64_t symAddr;
+    };
+
 public:
     SourceView();
 
@@ -160,7 +168,7 @@ public:
     void SetCpuId( uint32_t cpuid );
 
     void OpenSource( const char* fileName, int line, const View& view, const Worker& worker );
-    void OpenSymbol( const char* fileName, int line, uint64_t baseAddr, uint64_t symAddr, Worker& worker, const View& view );
+    void OpenSymbol( const char* fileName, int line, uint64_t baseAddr, uint64_t symAddr, Worker& worker, const View& view, bool updateHistory = true );
     void Render( Worker& worker, View& view );
 
     void CalcInlineStats( bool val ) { m_calcInlineStats = val; }
@@ -287,6 +295,9 @@ private:
         size_t sel;
         std::vector<uint64_t> target;
     } m_asmTarget;
+
+    std::vector<History> m_history;
+    size_t m_historyCursor = 0;
 };
 
 }