| commit | 20ba6afe4c46be33b28dea80452432fb138d423e | [log] [tgz] |
|---|---|---|
| author | Tess Strickland <sstrickl@google.com> | Tue Jul 13 07:39:25 2021 +0000 |
| committer | commit-bot@chromium.org <commit-bot@chromium.org> | Tue Jul 13 07:39:25 2021 +0000 |
| tree | 4bdd72e88d7e913152139f7d9767a781d5f3a823 | |
| parent | a92fe49002e8f0a348265fef12d9ee4af50b4f77 [diff] |
[vm] Delay symbol table creation further. Create all symbol table-related sections after all other sections, right before section re-ordering. Also remove the need to keep fields in the Elf object for most of these sections, only keeping fields for the static symbol table and the dynamic table, which handles updates and finalization for the dynamic symbol table. Reworks symbols so that they are stored in a growable array in the symbol table instead of as separately allocated objects. Since this disallows constant fields in Symbol objects due to the need for a copy constructor, initialize the offset of symbols with the section-relative offset. This can be adjusted to a snapshot-relative offset after section memory offsets are computed. Instead of updating indices and offsets by individually looking up symbols via their name, just create a map from section indices to new section indices (for index updates) or to memory offsets (for offset adjustment) and iterate over all the symbols, applying the map appropriately. Move non-PT_LOAD, non-PT_PHDR segment creation into OrderSectionsAndCreateSegments. TEST=Refactoring, so existing ELF-based tests. Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-debug-simarm_x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-dwarf-linux-product-x64-try Change-Id: Ic22f1bf3ab0b00ff3e73c431f92209526e787927 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/206220 Commit-Queue: Tess Strickland <sstrickl@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
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