Add mini-debug-info generation mode for JIT.
This excludes everything that is not needed for backtraces and
compresses the resulting ELF file (wrapped in another ELF file).
This approximately halves the size of the debug data for JIT.
The vast majority of the data is the overhead of ELF header.
We could amortize this by storing more methods per ELF file.
It also adds NOBITS .text section to all debug ELF files,
as that seems necessary for gdb to find the symbols.
On the other hand, it removes .rodata from debug ELF files.
Test: Manually tested that gdb can use this data to unwind.
Test: m test-art-host-gtest
Test: testrunner.py --optimizing --host
Test: testrunner.py -t 137-cfi
Change-Id: Ic0a2dfa953cb79973a7b2ae99d32018599e61171
diff --git a/compiler/debug/elf_symtab_writer.h b/compiler/debug/elf_symtab_writer.h
index 0907e10..57e010f 100644
--- a/compiler/debug/elf_symtab_writer.h
+++ b/compiler/debug/elf_symtab_writer.h
@@ -79,8 +79,9 @@
last_name_offset = name_offset;
}
- const auto* text = info.is_code_address_text_relative ? builder->GetText() : nullptr;
- uint64_t address = info.code_address + (text != nullptr ? text->GetAddress() : 0);
+ const auto* text = builder->GetText();
+ uint64_t address = info.code_address;
+ address += info.is_code_address_text_relative ? text->GetAddress() : 0;
// Add in code delta, e.g., thumb bit 0 for Thumb2 code.
address += CompiledMethod::CodeDelta(info.isa);
symtab->Add(name_offset, text, address, info.code_size, STB_GLOBAL, STT_FUNC);