dschuff added inline comments.
================ Comment at: llvm/lib/ObjCopy/wasm/WasmReader.cpp:32-35 - // If the section type is CUSTOM, it has a name already. If it's a new type - // of section that we don't explicitly handle here, it will have an empty - // name and objcopy won't be able to select it by name (e.g. for removal - // or dumping) but it will still be valid and able to be copied. ---------------- aheejin wrote: > dschuff wrote: > > aheejin wrote: > > > Why was this removed? It doesn't look like it's related to the last > > > section thing.. It's just explaning custom sections have names already. > > Checking against `WASM_SEC_LAST_KNOWN` ensures that there can't be a new > > type of section that we don't explicitly handle here (because no types of > > known sections are explicitly handled or mentioned); any section known to > > `sectionTypeToString` will work. > I'm not sure if I understand. Is this related to `WASM_SEC_TAG` -> > `WASM_LAST_SEC_KNOWN` change in this PR? Or it's just an unrelated drive-by > fix? > > > Checking against `WASM_SEC_LAST_KNOWN` ensures that there can't be a new > > type of section that we don't explicitly handle here (because no types of > > known sections are explicitly handled or mentioned); > > I'm not sure what this means.. > > > If the section type is CUSTOM, it has a name already. > > Why is this deleted too? How is the custom section related to > `WASM_SEC_LAST_KNOWN`? It is indirectly related. The purpose of this block of code is to fill in the `Name` field of the `WasmSection` object for known sections (as the comment on line 27 explains). Suppose we add a new type of known section, WASM_SEC_NEW, and we update `sectionTypeToString` but forget to update this file. Before this CL, the behavior would be as described in the comment I'm deleting; this code would silently fail to give that section a name, which would mean it couldn't be selected by llvm-objdump. After this CL, everything would work, without needing any updates to this file (and if we forgot to update `sectionTypeToString` it would assert when encountering an unknown section type). So this comment was just to describe the somewhat surprising failure mode, and isn't necessary anymore. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D127164/new/ https://reviews.llvm.org/D127164 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
