llvm-project

eb921573 - [MemProf] Add ability to export or highlight only a portion of graph (#128255)

[MemProf] Add ability to export or highlight only a portion of graph (#128255) To simplify debugging and analysis, particularly for very large applications with large graphs, this patch adds support for either highlighting a single context id or allocation's context ids, and/or only exporting the nodes/edges for a single context id or allocation's context ids. When highlighting, the specified nodes and edges are a brighter color and larger. This can be controlled by the new -memprof-dot-scope={all,alloc,context} flag which controls how much to export, along with two companion flags: -memprof-dot-alloc-id=ID -memprof-dot-context-id=ID These two are interpreted differently depending on the value of -memprof-dot-scope (where "all" is the default). If exporting all, one of the above flags can optionally be passed to highlight the nodes/edges for the given context id or allocation's context ids. If exporting alloc scope, an alloc id must be provided. A context id can optionally be provided to highlight that context. If exporting context scope, a context id must be provided. The ids to use can be obtained either by looking at the full graph, or a context id can be identified from the -memprof-report-hinted-sizes output after PR128188 is merged.