[NFC][LLDB][BoundsSatety] Add InstrumentationRuntime::MatchAllModules (llvm#166001)

This adds a virtual method that allows `InstrumentationRuntime` sub
classes to match against all modules rather than just a library that
matches a particular regex. When the implementation returns true
`GetPatternForRuntimeLibrary()` is ignored and all modules are iterated
over. The default implementation returns false which was the previous
behavior which uses `GetPatternForRuntimeLibrary()` to only match a
particular runtime library.

The intended use case here is for implementing an
`InstrumentationRuntime` where the runtime library of interest can have
multiple implementations and whose name is not known ahead of time.

The concrete use case here is for a `InstrumentationRuntime` plugin for
implementations of the `-fbounds-safety` soft-trap runtime which can
have multiple different implementations and so the module containing the
runtime functions isn't known ahead of time. This plug-in will be
upstreamed as part of the process of upstreaming `-fbounds-safety`.

An alternative to this would be for the `GetPatternForRuntimeLibrary()`
function to return a regex that matches everything. While that
technically works this new API more clearly indicates in the intent. We
probably also save a little perf by not executing the regex match for
every loaded module but I have not measured this.

rdar://163230807

Author: delcypher

lldb/include/lldb/Target/InstrumentationRuntime.h

@@ -73,6 +73,13 @@ class InstrumentationRuntime
   /// is guaranteed to be loaded.
   virtual void Activate() = 0;
 
+  /// \return true if `CheckIfRuntimeIsValid` should be called on all modules.
+  /// In this case the return value of `GetPatternForRuntimeLibrary` will be
+  /// ignored. Return false if `CheckIfRuntimeIsValid` should only be called
+  /// for modules whose name matches `GetPatternForRuntimeLibrary`.
+  ///
+  virtual bool MatchAllModules() { return false; }
+
 public:
   static void ModulesDidLoad(lldb_private::ModuleList &module_list,
                              Process *process,

lldb/source/Target/InstrumentationRuntime.cpp

@@ -55,7 +55,8 @@ void InstrumentationRuntime::ModulesDidLoad(
       return IterationAction::Continue;
 
     const RegularExpression &runtime_regex = GetPatternForRuntimeLibrary();
-    if (runtime_regex.Execute(file_spec.GetFilename().GetCString()) ||
+    if (MatchAllModules() ||
+        runtime_regex.Execute(file_spec.GetFilename().GetCString()) ||
         module_sp->IsExecutable()) {
       if (CheckIfRuntimeIsValid(module_sp)) {
         SetRuntimeModuleSP(module_sp);