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EMTERPRETIFY incompatible with g4 #6724

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Beuc opened this issue Jun 19, 2018 · 3 comments
Closed

EMTERPRETIFY incompatible with g4 #6724

Beuc opened this issue Jun 19, 2018 · 3 comments

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@Beuc
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@Beuc Beuc commented Jun 19, 2018

Test cases:

echo "int main(void) {}" > whatever.c
$ emcc -g4 -s EMTERPRETIFY=1 whatever.c -o t/index.html
Fatal: error in handling debug info
Traceback (most recent call last):
  File "/home/me/workdir/emsource/emscripten-incoming/emcc", line 11, in <module>
    python_selector.run(__file__)
  File "/home/me/workdir/emsource/emscripten-incoming/tools/python_selector.py", line 38, in run
    sys.exit(run_by_import(filename, main) if on_allowed_version() else run_by_subprocess(filename))
  File "/home/me/workdir/emsource/emscripten-incoming/tools/python_selector.py", line 13, in run_by_import
    return getattr(importlib.import_module(os.path.basename(filename)), main)()
  File "/home/me/workdir/emsource/emscripten-incoming/emcc.py", line 1941, in run
    wasm_text_target, misc_temp_files, optimizer)
  File "/home/me/workdir/emsource/emscripten-incoming/emcc.py", line 2412, in do_binaryen
    subprocess.check_call(cmd)
  File "/usr/lib/python2.7/subprocess.py", line 186, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/home/me/.emscripten_ports/binaryen/binaryen-version_48/bin/asm2wasm', 't/index.temp.asm.js', '--total-memory=16777216', '--trap-mode=allow', '--mem-init=t/index.html.mem', '--mem-base=1024', '-g', '-o', 't/index.wast', '-S']' returned non-zero exit status 1

and more puzzlingly:

$ emcc -g4 -s MAIN_MODULE=1 -s EMTERPRETIFY=1 whatever.c -o t/index.html
WARNING:root:BINARYEN_ASYNC_COMPILATION disabled due to user options. This will reduce performance and compatibility (some browsers limit synchronous compilation), see https://github.com/kripken/emscripten/wiki/WebAssembly#codegen-effects
confusing expression ["var", [["$$0", 0], ["$$0$i$i", 0], ["$$0$i$i$i", 0], ["$$0$i16$i", 0], ["$$0187$i", 0], ["$$0189$i", 0], ["$$0190$i", 0], ["$$0191$i", 0], ["$$0197", 0], ["$$0199", 0], ["$$02065$i$i", 0], ["$$0207$lcssa$i$i", 0], ["$$02074$i$i", 0], ["$$0211$i$i", 0], ["$$0212$i$i", 0], ["$$024372$i", 0], ["$$0286$i$i", 0], ["$$028711$i$i", 0], ["$$0288$lcssa$i$i", 0], ["$$028810$i$i", 0], ["$$0294$i$i", 0], ["$$0295$i$i", 0], ["$$0340$i", 0], ["$$034217$i", 0], ["$$0343$lcssa$i", 0], ["$$034316$i", 0], ["$$0345$i", 0], ["$$0351$i", 0], ["$$0357$i", 0], ["$$0358$i", 0], ["$$0360$i", 0], ["$$0361$i", 0], ["$$0367$i", 0], ["$$1194$i", 0], ["$$1194$i$be", 0], ["$$1194$i$ph", 0], ["$$1196$i", 0], ["$$1196$i$be", 0], ["$$1196$i$ph", 0], ["$$124471$i", 0], ["$$1290$i$i", 0], ["$$1290$i$i$be", 0], ["$$1290$i$i$ph", 0], ["$$1292$i$i", 0], ["$$1292$i$i$be", 0], ["$$1292$i$i$ph", 0], ["$$1341$i", 0], ["$$1346$i", 0], ["$$1362$i", 0], ["$$1369$i", 0], ["$$1369$i$be", 0], ["$$1369$i$ph", 0], ["$$1373$i", 0], ["$$1373$i$be", 0], ["$$1373$i$ph", 0], ["$$2234243136$i", 0], ["$$2247$ph$i", 0], ["$$2253$ph$i", 0], ["$$2353$i", 0], ["$$3$i", 0], ["$$3$i$i", 0], ["$$3$i203", 0], ["$$3$i203218", 0], ["$$3348$i", 0], ["$$3371$i", 0], ["$$4$lcssa$i", 0], ["$$420$i", 0], ["$$420$i$ph", 0], ["$$4236$i", 0], ["$$4349$lcssa$i", 0], ["$$434919$i", 0], ["$$434919$i$ph", 0], ["$$4355$i", 0], ["$$535618$i", 0], ["$$535618$i$ph", 0], ["$$723947$i", 0], ["$$748$i", 0], ["$$pre", 0], ["$$pre$i", 0], ["$$pre$i$i", 0], ["$$pre$i17$i", 0], ["$$pre$i208", 0], ["$$pre$i210", 0], ["$$pre$phi$i$iZ2D", 0], ["$$pre$phi$i18$iZ2D", 0], ["$$pre$phi$i209Z2D", 0], ["$$pre$phi$iZ2D", 0], ["$$pre$phi17$i$iZ2D", 0], ["$$pre$phiZ2D", 0], ["$$pre16$i$i", 0], ["$$sink", 0], ["$$sink325", 0], ["$$sink326", 0], ["$1", 0], ["$10", 0], ["$100", 0], ["$1000", 0], ["$1001", 0], ["$1002", 0], ["$1003", 0], ["$1004", 0], ["$1005", 0], ["$1006", 0], ["$1007", 0], ["$1008", 0], ["$1009", 0], ["$101", 0], ["$1010", 0], 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Traceback (most recent call last):
  File "/home/me/workdir/emsource/emscripten-incoming/emcc", line 11, in <module>
    python_selector.run(__file__)
  File "/home/me/workdir/emsource/emscripten-incoming/tools/python_selector.py", line 38, in run
    sys.exit(run_by_import(filename, main) if on_allowed_version() else run_by_subprocess(filename))
  File "/home/me/workdir/emsource/emscripten-incoming/tools/python_selector.py", line 13, in run_by_import
    return getattr(importlib.import_module(os.path.basename(filename)), main)()
  File "/home/me/workdir/emsource/emscripten-incoming/emcc.py", line 1941, in run
    wasm_text_target, misc_temp_files, optimizer)
  File "/home/me/workdir/emsource/emscripten-incoming/emcc.py", line 2412, in do_binaryen
    subprocess.check_call(cmd)
  File "/usr/lib/python2.7/subprocess.py", line 186, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/home/me/.emscripten_ports/binaryen/binaryen-version_48/bin/asm2wasm', 't/index.asm.js', '--total-memory=16777216', '--trap-mode=allow', '--mem-init=t/index.html.mem', '--table-max=-1', '-g', '-o', 't/index.wast', '-S']' returned non-zero exit status -6

Tested on 1.38.6 / today's incoming.
I already had the issue in 1.38.1, I only narrowed the root cause today.

@kripken
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@kripken kripken commented Jun 20, 2018

Hmm, the underlying issue is that we don't have a way to support source maps with the emterpreter - once we compile to bytecode, the browser can't see it. In theory we could still support non-emterpreted code, but that would be complex to support. Probably we should just show a compiler error on that combination not being supported, I opened #6729

kripken added a commit that referenced this issue Jun 22, 2018
Also refactor source map checking code in emcc.py: avoid a constant "4" everywhere, instead use a nice utility function.

Adds an error for #6724
@kripken
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@kripken kripken commented Jun 22, 2018

We now show an error. Not sure if it's worth it doing anything more here.

@Beuc
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@Beuc Beuc commented Jun 22, 2018

Fine by me.

@Beuc Beuc closed this Jun 22, 2018
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