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addr2line.py: Fix issue of applying offset in call stacks information (#3194)

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The offset value is based on the start of the wasm file, it also equals to
the value of `wasm-objdump -d <wasm_file>`.
This commit is contained in:
liang.he 2024-03-01 10:56:36 +08:00 committed by GitHub
parent 21819fcff6
commit 1b9fbb162f
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1 changed files with 2 additions and 48 deletions
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50
test-tools/addr2line/addr2line.py
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@ -31,10 +31,9 @@ For example, there is a call-stack dump:
- run the following command to transfer the address to line info:
```
$ cd test-tools/addr2line
$ python3 addr2line.py --wasi-sdk <wasi-sdk installation> --wabt <wabt installation> --wasm-file <wasm file path> call_stack.txt
$ python3 addr2line.py --wasi-sdk <wasi-sdk installation> --wasm-file <wasm file path> call_stack.txt
```
- the script will use *wasm-objdump* in wabt to transform address, then use *llvm-dwarfdump* to lookup the line info for each address
in the call-stack dump.
- the script will use *llvm-dwarfdump* to lookup the line info for each address in the call-stack dump.
- the output will be:
```
#00: 0x0a04 - $f18
@ -46,42 +45,6 @@ For example, there is a call-stack dump:
"""
def get_code_section_start(wasm_objdump: Path, wasm_file: Path) -> int:
"""
Find the start offset of Code section in a wasm file.
if the code section header likes:
Code start=0x0000017c end=0x00004382 (size=0x00004206) count: 47
the start offset is 0x0000017c
"""
cmd = f"{wasm_objdump} -h {wasm_file}"
p = subprocess.run(
shlex.split(cmd),
check=True,
capture_output=True,
text=True,
universal_newlines=True,
)
outputs = p.stdout.split(os.linesep)
# if there is no .debug section, return -1
for line in outputs:
line = line.strip()
if ".debug_info" in line:
break
else:
print(f"No .debug_info section found {wasm_file}")
return -1
for line in outputs:
line = line.strip()
if "Code" in line:
return int(line.split()[1].split("=")[1], 16)
return -1
def get_line_info(dwarf_dump: Path, wasm_file: Path, offset: int) -> str:
"""
Find the location info of a given offset in a wasm file.
@ -142,21 +105,13 @@ def parse_call_stack_line(line: str) -> ():
def main():
parser = argparse.ArgumentParser(description="addr2line for wasm")
parser.add_argument("--wasi-sdk", type=Path, help="path to wasi-sdk")
parser.add_argument("--wabt", type=Path, help="path to wabt")
parser.add_argument("--wasm-file", type=Path, help="path to wasm file")
parser.add_argument("call_stack_file", type=Path, help="path to a call stack file")
args = parser.parse_args()
wasm_objdump = args.wabt.joinpath("bin/wasm-objdump")
assert wasm_objdump.exists()
llvm_dwarf_dump = args.wasi_sdk.joinpath("bin/llvm-dwarfdump")
assert llvm_dwarf_dump.exists()
code_section_start = get_code_section_start(wasm_objdump, args.wasm_file)
if code_section_start == -1:
return -1
assert args.call_stack_file.exists()
with open(args.call_stack_file, "rt", encoding="ascii") as f:
for line in f:
@ -173,7 +128,6 @@ def main():
_, offset, _ = splitted
offset = int(offset, 16)
offset = offset - code_section_start
line_info = get_line_info(llvm_dwarf_dump, args.wasm_file, offset)
if not line_info:
print(line)