Move `sectionKind` outside the bitfield and move bss/keepUnique to
InputSectionBase.
* sizeof(InputSection) decreases from 160 to 152 on 64-bit systems.
* The numerous `sectionKind` accesses are faster.
This commit completes the work that eliminates global variables like
config/target/inputSections/symTab from lld/ELF.
Key changes:
* Introduced `lld:🧝:ctx` to encapsulate global state.
* Moved global variables into `Ctx lld:🧝:ctx`
* Updated many functions to accept `Ctx &ctx`
* Made `ctx` a local variable (this commit)
If we don't count `static std::mutex`, this is the last major global
state within lld/ELF (minor ones like `SharedFile::vernauxNum`
(33ff9e43b4c5bdc3da31c6b11ad51d35a69bec5f) might not all be eliminated
yet).
so that we can remove the global `ctx` from toString implementations.
Rename lld::toString (to lld:🧝:toStr) to simplify name lookup (we
have many llvm::toString and another lld::toString(const llvm::opt::Arg
&)).
When PAuth core info is present and (platform,version) is not (0,0),
treat input files as pac-enabled and do not emit a warning with
`-z pac-plt` passed.
The current diagnostic functions log/warn/error/fatal lack a context
argument and call the global `lld::errorHandler()`, which prevents
multiple lld instances in one process.
This patch introduces context-aware replacements:
* log => Log(ctx)
* warn => Warn(ctx)
* errorOrWarn => Err(ctx)
* error => ErrAlways(ctx)
* fatal => Fatal(ctx)
Example: `errorOrWarn(toString(f) + "xxx")` => `Err(ctx) << f << "xxx"`.
(`toString(f)` is shortened to `f` as a bonus and may access `ctx`
without accessing the global variable (see `Target.cpp`)).
`ctx.e = &context->e;` can be replaced with a non-global Errorhandler
when `ctx` becomes a local variable.
(For the ELF port, the long term goal is to eliminate `error`. Most can
be straightforwardly converted to `Err(ctx)`.)
also rename `TargetInfo *getXXXTargetInfo` to `void setXXXTargetInfo`
and change it to set `ctx.target`. This ensures that when `ctx` becomes
a local variable, two lld invocations will not reuse the function-local
static variable.
---
Reland after commit c35214c131c0bc7f54dc18ceb75c75cba89f58ee
([ELF] Initialize TargetInfo members).
also rename `TargetInfo *getXXXTargetInfo` to `void setXXXTargetInfo`
and change it to set `ctx.target`. This ensures that when `ctx` becomes
a local variable, two lld invocations will not reuse the function-local
static variable.
