When memory is declared in the Wasm module, we rely on the implicit zero
initialization behavior and do not explicitly output .bss sections. The means
that they do not have associated `outputSec` entries, which was causing
segfaults in the mapfile support. Fix the issue by guarding against null
`outputSec` and falling back to using a zero offset.
Differential Revision: https://reviews.llvm.org/D102951
Specifically:
- InputChunk::outputOffset -> outSecOffset
- Symbol::get/setVirtualAddress -> get/setVA
- add InputChunk::getOffset helper that takes an offset
These are mostly in preparation for adding support for
SHF_MERGE/SHF_STRINGS but its also good to align with ELF where
possible.
Differential Revision: https://reviews.llvm.org/D97595
With dynamic linking we have the current limitation that there can be
only a single active data segment (since we use __memory_base as the
load address and we can't do arithmetic in constant expresions).
This change delays the merging of active segments until a little later
in the linking process which means that the grouping of data by section,
and the magic __start/__end symbols work as expected under dynamic
linking.
Differential Revision: https://reviews.llvm.org/D96453
This commit regroups commonalities among InputGlobal, InputEvent, and
InputTable into the new InputElement. The subclasses are defined
inline in the new InputElement.h. NFC.
Reviewed By: sbc100
Differential Revision: https://reviews.llvm.org/D94677
The code previously assumed that `getChunk` would return a non-null pointer for
every symbol, but in fact it only returns non-null pointers for DefinedFunction
and DefinedData symbols. This patch fixes the segfault by checking whether
`getChunk` returns a null for each symbol and skipping the mapping output for
any symbols for which it does.
Differential Revision: https://reviews.llvm.org/D88369
