Addr2line enhance 3#4975
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Refactor the wasm symbolicator to make its toolchain workarounds
explicit. addr2line.py now detects the wasi-sdk's clang major version
at startup and routes per-frame address resolution to one of:
- resolve_address_modern (clang >= 22, wasi-sdk 33+):
single llvm-symbolizer call per address. The symbolizer handles
address-to-name correctly on this clang.
- resolve_address_legacy (clang < 22 or unknown):
llvm-symbolizer call + llvm-dwarfdump --lookup overlay to fix
the outermost function name. Older clang versions emit wasm DWARF
that confuses llvm-symbolizer's address-to-name resolver for some
addresses (e.g., reports 'recurse' as 'free'). --lookup goes
through a different DWARF traversal path that handles them.
The dispatch decision is logged once to stderr so users can see
which path was taken without polluting stdout. Stdout is byte-
identical between paths for non-buggy inputs.
Also includes accumulated improvements:
- --mode flag {interp,aot,fast-interp} for different runtime offset
conventions (interp post-advance, aot at-instruction-start,
fast-interp's transformed in-memory bytecode)
- Inline frame annotation "(inlined into <next>)" for clarity
- llvm-symbolizer preferred over llvm-addr2line for column info
- Fallback for offset=0 (trap at function entry; frame_ip not captured)
- Last-resort function-index name fallback when DWARF lacks PC ranges
New self-contained sample demonstrating the full production-debug workflow for optimized WASM: - 4-step build pipeline (clang -Oz -g -flto, wasm-opt -Oz -g, llvm-strip --strip-all, wamrc) producing prod.wasm + prod.aot + debug.wasm companion artifacts. - Two test apps (oob, stackoverflow) split into multi-file C sources to exercise cross-TU LTO inlining. - USE_FAST_INTERP CMake option to build iwasm in classic or fast-interp mode for testing. - symbolicate.sh: end-to-end driver that runs iwasm on the prod binary, captures the call stack, and resolves it via addr2line.py + the debug companion. Auto-detects classic vs fast-interp from the iwasm binary. - verify.sh: per-(app, mode) assertion that the symbolicated output contains the expected source files. Used by CI. Depends on the addr2line.py refactor (--mode flag is invoked from symbolicate.sh).
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