Debugger: Add convenience function to BaseUnit...

...to query if a given global offset is within its range.

src/apps/debugger/dwarf/BaseUnit.cpp

@@ -53,6 +53,13 @@ BaseUnit::AddDebugInfoEntry(DebugInfoEntry* entry, off_t offset)
 }
 
 
+bool
+BaseUnit::ContainsAbsoluteOffset(off_t offset) const
+{
+	return fHeaderOffset <= offset && fHeaderOffset + fTotalSize > offset;
+}
+
+
 void
 BaseUnit::SetSourceLanguage(const SourceLanguageInfo* language)
 {

src/apps/debugger/dwarf/BaseUnit.h

@@ -45,6 +45,8 @@ public:
 			off_t				AbbreviationOffset() const
 									{ return fAbbreviationOffset; }
 
+			bool				ContainsAbsoluteOffset(off_t offset) const;
+
 			uint8				AddressSize() const	{ return fAddressSize; }
 			bool				IsDwarf64() const	{ return fIsDwarf64; }