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@@ -31,9 +31,10 @@ For example, there is a call-stack dump:
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- run the following command to transfer the address to line info:
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```
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$ cd test-tools/addr2line
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- $ python3 addr2line.py --wasi-sdk <wasi-sdk installation> --wasm-file <wasm file path> call_stack.txt
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+ $ python3 addr2line.py --wasi-sdk <wasi-sdk installation> --wabt <wabt installation> --wasm-file <wasm file path> call_stack.txt
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```
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-- the script will use *llvm-dwarfdump* to lookup the line info for each address in the call-stack dump.
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+- the script will use *wasm-objdump* in wabt to transform address, then use *llvm-dwarfdump* to lookup the line info for each address
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+ in the call-stack dump.
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- the output will be:
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```
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#00: 0x0a04 - $f18
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@@ -45,6 +46,42 @@ For example, there is a call-stack dump:
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"""
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+def get_code_section_start(wasm_objdump: Path, wasm_file: Path) -> int:
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+ """
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+ Find the start offset of Code section in a wasm file.
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+
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+ if the code section header likes:
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+ Code start=0x0000017c end=0x00004382 (size=0x00004206) count: 47
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+
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+ the start offset is 0x0000017c
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+ """
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+ cmd = f"{wasm_objdump} -h {wasm_file}"
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+ p = subprocess.run(
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+ shlex.split(cmd),
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+ check=True,
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+ capture_output=True,
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+ text=True,
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+ universal_newlines=True,
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+ )
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+ outputs = p.stdout.split(os.linesep)
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+
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+ # if there is no .debug section, return -1
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+ for line in outputs:
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+ line = line.strip()
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+ if ".debug_info" in line:
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+ break
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+ else:
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+ print(f"No .debug_info section found {wasm_file}")
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+ return -1
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+
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+ for line in outputs:
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+ line = line.strip()
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+ if "Code" in line:
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+ return int(line.split()[1].split("=")[1], 16)
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+
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+ return -1
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+
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+
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def get_line_info(dwarf_dump: Path, wasm_file: Path, offset: int) -> str:
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"""
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Find the location info of a given offset in a wasm file.
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@@ -105,13 +142,21 @@ def parse_call_stack_line(line: str) -> ():
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def main():
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parser = argparse.ArgumentParser(description="addr2line for wasm")
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parser.add_argument("--wasi-sdk", type=Path, help="path to wasi-sdk")
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+ parser.add_argument("--wabt", type=Path, help="path to wabt")
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parser.add_argument("--wasm-file", type=Path, help="path to wasm file")
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parser.add_argument("call_stack_file", type=Path, help="path to a call stack file")
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args = parser.parse_args()
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+ wasm_objdump = args.wabt.joinpath("bin/wasm-objdump")
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+ assert wasm_objdump.exists()
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+
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llvm_dwarf_dump = args.wasi_sdk.joinpath("bin/llvm-dwarfdump")
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assert llvm_dwarf_dump.exists()
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+ code_section_start = get_code_section_start(wasm_objdump, args.wasm_file)
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+ if code_section_start == -1:
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+ return -1
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+
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assert args.call_stack_file.exists()
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with open(args.call_stack_file, "rt", encoding="ascii") as f:
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for line in f:
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@@ -128,6 +173,7 @@ def main():
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_, offset, _ = splitted
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offset = int(offset, 16)
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+ offset = offset - code_section_start
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line_info = get_line_info(llvm_dwarf_dump, args.wasm_file, offset)
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if not line_info:
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print(line)
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@@ -143,4 +189,14 @@ def main():
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if __name__ == "__main__":
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+ print(
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+ "**************************************************\n"
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+ + "Before running this script, please make sure:\n"
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+ + " - the wasm file is compiled with debug info. (like: clang -g) \n"
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+ + " - the call-stack dump is generated by iwasm\n"
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+ + " - iwasm is compiled with -DWAMR_BUILD_DUMP_CALL_STACK=1\n"
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+ + " - iwasm isn't running under fast-interp mode. -DWAMR_BUILD_FAST_INTERP=0\n"
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+ + " - if using .aot, the aot file is generated with `--enable-dump-call-stack`\n"
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+ + "**************************************************\n"
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+ )
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sys.exit(main())
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