Wasmtime GitHub notifications bot (Oct 05 2021 at 14:21): Wasmtime GitHub notifications bot (Oct 05 2021 at 14:21):adv-sw labeled issue #3419:
Unzip test case.
On Linux :
Run make_wasm.sh to build
Optional lldbg debugging front end - tested linux & windows : https://github.com/adv-sw/lldbg
Modify dbg_wasm.sh to run under lldb direct instead of new lldbg front end if you want to skip that.Run dbg_wasm.sh to run under debugger.
Place breakpoint in test.cpp in Thing constructor on assignment m_i = i;
Start program, hit breakpoint.
Inspect "this"
Expected Results
Should contain single integer member m_i
Actual Results
"this" is empty - not populated correctly.
Console : warning: `this' is not accessible (substituting 0)
Unsure where that's coming from - doesn't seem to be cranelift.
Versions and Environment
Cranelift & wasmtime trunk as of 3/10/21
lldb trunk as of late Sept 21.
lldbg trunkOperating system: Windows 11 & Ubuntu tested.
Architecture: x64
test.zip
Wasmtime GitHub notifications bot (Oct 05 2021 at 14:21):adv-sw opened issue #3419:
Unzip test case.
On Linux :
Run make_wasm.sh to build
Optional lldbg debugging front end - tested linux & windows : https://github.com/adv-sw/lldbg
Modify dbg_wasm.sh to run under lldb direct instead of new lldbg front end if you want to skip that.Run dbg_wasm.sh to run under debugger.
Place breakpoint in test.cpp in Thing constructor on assignment m_i = i;
Start program, hit breakpoint.
Inspect "this"
Expected Results
Should contain single integer member m_i
Actual Results
"this" is empty - not populated correctly.
Console : warning: `this' is not accessible (substituting 0)
Unsure where that's coming from - doesn't seem to be cranelift.
Versions and Environment
Cranelift & wasmtime trunk as of 3/10/21
lldb trunk as of late Sept 21.
lldbg trunkOperating system: Windows 11 & Ubuntu tested.
Architecture: x64
test.zip
Wasmtime GitHub notifications bot (Oct 05 2021 at 14:21):adv-sw labeled issue #3419:
Unzip test case.
On Linux :
Run make_wasm.sh to build
Optional lldbg debugging front end - tested linux & windows : https://github.com/adv-sw/lldbg
Modify dbg_wasm.sh to run under lldb direct instead of new lldbg front end if you want to skip that.Run dbg_wasm.sh to run under debugger.
Place breakpoint in test.cpp in Thing constructor on assignment m_i = i;
Start program, hit breakpoint.
Inspect "this"
Expected Results
Should contain single integer member m_i
Actual Results
"this" is empty - not populated correctly.
Console : warning: `this' is not accessible (substituting 0)
Unsure where that's coming from - doesn't seem to be cranelift.
Versions and Environment
Cranelift & wasmtime trunk as of 3/10/21
lldb trunk as of late Sept 21.
lldbg trunkOperating system: Windows 11 & Ubuntu tested.
Architecture: x64
test.zip
Wasmtime GitHub notifications bot (Oct 05 2021 at 14:26):adv-sw edited issue #3419:
Unzip test case.
On Linux :
Run make_wasm.sh to build
Optional lldbg debugging front end - tested linux & windows : https://github.com/adv-sw/lldbg
Modify dbg_wasm.sh to run under lldb direct instead of new lldbg front end if you want to skip that - same command line, just s/lldbg/lldbRun dbg_wasm.sh to run under debugger.
Place breakpoint in test.cpp in Thing constructor on assignment m_i = i;
Start program, hit breakpoint.
Inspect "this"
Expected Results
Should contain single integer member m_i
Actual Results
"this" is empty - not populated correctly.
Console : warning: `this' is not accessible (substituting 0)
Unsure where that's coming from - doesn't seem to be cranelift.
Versions and Environment
Cranelift & wasmtime trunk as of 3/10/21
lldb trunk as of late Sept 21.
lldbg trunkOperating system: Windows 11 & Ubuntu tested.
Architecture: x64
test.zip
Wasmtime GitHub notifications bot (Oct 05 2021 at 14:30):adv-sw edited issue #3419:
Unzip test case.
On Linux :
Run make_wasm.sh to build
Optional lldbg debugging front end - tested linux & windows : https://github.com/adv-sw/lldbg
Modify dbg_wasm.sh to run under lldb direct instead of new lldbg front end if you want to skip that - same command line, just s/lldbg/lldbRun dbg_wasm.sh to run under debugger.
Place breakpoint in test.cpp in Thing constructor on assignment m_i = i;
Start program, hit breakpoint.
Inspect "this"
Expected Results
Should contain single integer member m_i
Actual Results
"this" is empty - not populated correctly.
Console : warning: `this' is not accessible (substituting 0)
Unsure where that's coming from - doesn't seem to be cranelift.
Versions and Environment
Cranelift & wasmtime trunk as of 3/10/21
lldb trunk as of late Sept 21.
lldbg trunkOperating system: Windows 11 & Ubuntu tested.
Architecture: x64
test.zipSevere C++ web assembly development productivity issue because webdevs need to be able to effectively debug their code.
Wasmtime GitHub notifications bot (Oct 11 2021 at 09:12):adv-sw commented on issue #3419:
Resolved here.
https://github.com/bytecodealliance/wasmtime/commit/92a10d1ace70fe75c3e2c646ea613168fc417851
Please review/merge.
Wasmtime GitHub notifications bot (Oct 11 2021 at 09:41):adv-sw edited issue #3419:
Unzip test case.
On Linux :
Run make_wasm.sh to build
Optional lldbg debugging front end - tested linux & windows : https://github.com/adv-sw/lldbg
Modify dbg_wasm.sh to run under lldb direct instead of new lldbg front end if you want to skip that - same command line, just s/lldbg/lldbRun dbg_wasm.sh to run under debugger.
Place breakpoint in test.cpp in Thing constructor on assignment m_i = i;
Start program, hit breakpoint.
Inspect "this"
Expected Results
Should contain single integer member m_i
Actual Results
"this" is empty - not populated correctly.
Console : warning: `this' is not accessible (substituting 0)
LLDB is complaining "this" is not a standard pointer. LLDB refuses to evaluate non-standard this & self pointers.
Hence we need a workaround to resolve from sandbox pointer, which is provided here :
https://github.com/bytecodealliance/wasmtime/commit/92a10d1ace70fe75c3e2c646ea613168fc417851
Versions and Environment
Cranelift & wasmtime trunk as of 3/10/21
lldb trunk as of late Sept 21.
lldbg trunkOperating system: Windows 11 & Ubuntu tested.
Architecture: x64
test.zipSevere C++ web assembly development productivity issue because webdevs need to be able to effectively debug their code.
Wasmtime GitHub notifications bot (Oct 11 2021 at 15:59):cfallin commented on issue #3419:
@adv-sw thanks for looking into this! Would you mind creating a PR for the review and merging of your commit? (The usual flow is that one will create this PR with the text "Fixes #ISSUE-NUMBER" in the commit message, which links it back to this issue and closes it when merged.)
Wasmtime GitHub notifications bot (Nov 05 2021 at 18:05):bacongobbler commented on issue #3419:
looks like https://github.com/bytecodealliance/wasmtime/pull/3443 has been merged, so this can be closed.
Wasmtime GitHub notifications bot (Nov 05 2021 at 18:23):cfallin commented on issue #3419:
Yes indeed, thank you for pointing this out!
Wasmtime GitHub notifications bot (Nov 05 2021 at 18:23):cfallin closed issue #3419:
Unzip test case.
On Linux :
Run make_wasm.sh to build
Optional lldbg debugging front end - tested linux & windows : https://github.com/adv-sw/lldbg
Modify dbg_wasm.sh to run under lldb direct instead of new lldbg front end if you want to skip that - same command line, just s/lldbg/lldbRun dbg_wasm.sh to run under debugger.
Place breakpoint in test.cpp in Thing constructor on assignment m_i = i;
Start program, hit breakpoint.
Inspect "this"
Expected Results
Should contain single integer member m_i
Actual Results
"this" is empty - not populated correctly.
Console : warning: `this' is not accessible (substituting 0)
LLDB is complaining "this" is not a standard pointer. LLDB refuses to evaluate non-standard this & self pointers.
Hence we need a workaround to resolve from sandbox pointer, which is provided here :
https://github.com/bytecodealliance/wasmtime/commit/92a10d1ace70fe75c3e2c646ea613168fc417851
Versions and Environment
Cranelift & wasmtime trunk as of 3/10/21
lldb trunk as of late Sept 21.
lldbg trunkOperating system: Windows 11 & Ubuntu tested.
Architecture: x64
test.zipSevere C++ web assembly development productivity issue because webdevs need to be able to effectively debug their code.
Last updated: Dec 23 2024 at 12:05 UTC