Feature Request: Add the ability to add user defined Custom Sections to wasm modules.

[davidmdm]

Problem

Not all language toolchains and ecosystems offer consistent or complete support for WASM custom sections during compilation. The lack of standard compiler support for readily embedding user-defined metadata into a module's custom section limits the ability of users to attach essential data for post-processing, tooling, or runtime use. This limitation necessitates an external, dedicated utility to manage this metadata.

Feature Proposal

Add a new command, or a set of subcommands under an existing utility (e.g., wasm-tools custom-section or under mutations), to enable users to manage a WASM module's custom sections.

• add/edit: Insert a new custom section or replace the contents of an existing custom section by name.
• remove: Delete a specified custom section by name.
• list: Display the names and associated data sizes of all custom sections within a module.

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History

• Question about the feature
• issue where mutate seems to have partial functionality for this described