Add PID information to -LL_miss_file output

[jin11109]

When using simulator parameters -LL_miss_file option, I noticed that the output was insufficient for detailed analysis, especially when distinguishing cache misses across processes. This limitation becomes more apparent in environments where multiple processes may experience cache misses at similar virtual memory addresses, potentially leading to ambiguous outputs.

So, I have updated the dump_miss function within caching_device_stats.cpp to include the PID in the output. This small yet impactful change ensures that each cache miss log entry is prefixed with the PID of the process, thereby enabling users to better correlate the cache misses with specific processes.

[derekbruening]

Thank you for contributing. It looks like a few tweaks are needed: see the detailed responses.

[derekbruening]

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[derekbruening]

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[derekbruening]

Merged. Thank you for contributing!

[joshua-warburton]

It seems this patch causes compilation errors on more recent (17) versions of clang:

/.../dynamorio/clients/drcachesim/simulator/caching_device_stats.cpp:173:56: error: format '%lld' expects argument of type 'long long int', but argument 3 has type 'dynamorio::drmemtrace::memref_pid_t {aka long int}' [-Werror=format=]