[Lldb-commits] [lldb] Add support for reading the dynamic symbol table from PT_DYNAMIC (PR #112596)

[Jacob Lalonde via lldb-commits]

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@@ -3895,3 +3924,103 @@ std::optional<lldb_private::DataExtractor> ObjectFileELF::GetDynamicData() {
   }
   return std::nullopt;
 }
+
+
+std::optional<DataExtractor>
+ObjectFileELF::GetDynsymDataFromDynamic(uint32_t &num_symbols) {
+  // Every ELF file which represents an executable or shared library has
+  // mandatory .dynamic entries. The DT_SYMTAB value contains a pointer to the
+  // symbol table, and DT_SYMENT contains the size of a symbol table entry.
+  // We then can use either the DT_HASH or DT_GNU_HASH to find the number of
+  // symbols in the symbol table as the symbol count is not stored in the
+  // .dynamic section as a key/value pair.
+  //
+  // When loading and ELF file from memory, only the program headers end up
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Jlalond wrote:

Great comment, but I would rephrase that only the program headers are guaranteed to be mapped

https://github.com/llvm/llvm-project/pull/112596