Add multiple_functions DWARF tests

Author: xoofx

src/LibObjectFile.Tests/Dwarf/DwarfTests.cs

@@ -199,6 +199,64 @@ public void TestDebugLineSmall()
             var cppName = "small";
             var cppObj = $"{cppName}_debug.o";
             LinuxUtil.RunLinuxExe("gcc", $"{cppName}.cpp -g -c -o {cppObj}");
+            ElfObjectFile elf;
+            using (var inStream = File.OpenRead(cppObj))
+            {
+                Console.WriteLine($"ReadBack from {cppObj}");
+                elf = ElfObjectFile.Read(inStream);
+                elf.Print(Console.Out);
+            }
+
+            var elfContext = new DwarfElfContext(elf);
+            var inputContext = new DwarfReaderContext(elfContext);
+            inputContext.DebugLinePrinter = Console.Out;
+            var dwarf = DwarfFile.Read(inputContext);
+
+            inputContext.DebugLineStream.Position = 0;
+            var copyInputDebugLineStream = new MemoryStream();
+            inputContext.DebugLineStream.CopyTo(copyInputDebugLineStream);
+            inputContext.DebugLineStream.Position = 0;
+
+            var outputContext = new DwarfWriterContext
+            {
+                IsLittleEndian = inputContext.IsLittleEndian,
+                AddressSize = inputContext.AddressSize,
+                DebugLineStream = new MemoryStream()
+            };
+            dwarf.Write(outputContext);
+
+            Console.WriteLine();
+            Console.WriteLine("=====================================================");
+            Console.WriteLine("Readback");
+            Console.WriteLine("=====================================================");
+            Console.WriteLine();
+
+            var reloadContext = new DwarfReaderContext()
+            {
+                IsLittleEndian = outputContext.IsLittleEndian,
+                AddressSize = outputContext.AddressSize,
+                DebugLineStream = outputContext.DebugLineStream
+            };
+
+            reloadContext.DebugLineStream.Position = 0;
+            reloadContext.DebugLineStream = outputContext.DebugLineStream;
+            reloadContext.DebugLinePrinter = Console.Out;
+
+            var dwarf2 = DwarfFile.Read(reloadContext);
+
+            var inputDebugLineBuffer = copyInputDebugLineStream.ToArray();
+            var outputDebugLineBuffer = ((MemoryStream)reloadContext.DebugLineStream).ToArray();
+            Assert.AreEqual(inputDebugLineBuffer, outputDebugLineBuffer);
+        }
+
+
+
+        [Test]
+        public void TestDebugLineMultipleFunctions()
+        {
+            var cppName = "multiple_functions";
+            var cppObj = $"{cppName}_debug.o";
+            LinuxUtil.RunLinuxExe("gcc", $"{cppName}.cpp -g -c -o {cppObj}");
 
             ElfObjectFile elf;
             using (var inStream = File.OpenRead(cppObj))
@@ -370,6 +428,8 @@ public void CreateDwarf()
                         }
                     }
                 );
+                // NOTE: doesn't seem to be generated by regular GCC
+                // (it seems that only one line sequence is usually used)
                 lineTable.AddLineSequence(new DwarfLineSequence()
                     {
 

src/LibObjectFile.Tests/LibObjectFile.Tests.csproj

@@ -11,10 +11,14 @@
     <None Remove="helloworld.cpp" />
     <None Remove="lib_a.cpp" />
     <None Remove="lib_b.cpp" />
+    <None Remove="multiple_functions.cpp" />
     <None Remove="small.cpp" />
   </ItemGroup>
 
   <ItemGroup>
+    <Content Include="multiple_functions.cpp">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="lib_b.cpp">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>

src/LibObjectFile.Tests/multiple_functions.cpp

@@ -0,0 +1,14 @@
+int process_add(int a, int b)
+{
+    return a + b;
+}
+
+float process_add2(float a, float b)
+{
+    return a + b;
+}
+
+float process_both(int a, float b)
+{
+    return (float)process_add(a, (int)b) + process_add2((float)a, b);
+}