building DWARF debug info into skia webassembly

craste...@gmail.com

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Apr 27, 2021, 10:15:03 AM4/27/21

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I need to debug something in webassembly, so I need to rebuild skia with DWARF debug support. How do I launch the compile shell script with parameters that would build a debug version that includes dwarf?

Mike Klein

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Apr 27, 2021, 10:35:05 AM4/27/21

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Is -g3 enough? If so, try a debug build?

if [[ $@ == *debug* ]]; then

echo "Building a Debug build"

EXTRA_CFLAGS="\"-DSK_DEBUG\","

RELEASE_CONF="-O0 --js-opts 0 -s DEMANGLE_SUPPORT=1 -s ASSERTIONS=1 -s GL_ASSERTIONS=1 -g3 \

--source-map-base /node_modules/canvaskit/bin/ -DSK_DEBUG --pre-js $BASE_DIR/debug.js"

BUILD_DIR=${BUILD_DIR:="out/canvaskit_wasm_debug"}

On Tue, Apr 27, 2021 at 9:15 AM craste...@gmail.com <craste...@gmail.com> wrote:

I need to debug something in webassembly, so I need to rebuild skia with DWARF debug support. How do I launch the compile shell script with parameters that would build a debug version that includes dwarf?

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craste...@gmail.com

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Apr 27, 2021, 10:38:57 AM4/27/21

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I can try. So, what would the exact command line be? "./compile.sh -g3" ? Would there be additional parameters for debug info?

Mike Klein

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Apr 27, 2021, 10:45:23 AM4/27/21

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The $@ == *debug* bit there is shell for "if the word 'debug' is anywhere on the command line." Try

$ modules/canvaskit/compile.sh debug

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craste...@gmail.com

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Apr 27, 2021, 11:02:38 AM4/27/21

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Okay. But how do I get the -g3 parameter included?

Mike Klein

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Apr 27, 2021, 11:08:13 AM4/27/21

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Running compile.sh with debug on the command line will include the -g3 parameter.

It might help you to understand if you read compile.sh, at least the snippet I quoted earlier.

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