[Memprof] Reduce test binary sizes for memprof tests. (#97114)

PR 94264 had substantial increase in test binary size. This was due to
building LLVM and compiler-rt with GCC, implicitly causing the

[Memprof] Reduce test binary sizes for memprof tests. (#97114)

PR 94264 had substantial increase in test binary size. This was due to
building LLVM and compiler-rt with GCC, implicitly causing the runtimes
to be built with full debuginfo. Rebuilding LLVM with
`-DCMAKE_CXX_COMPILER=/usr/bin/clang++` and regenerating .exe files with
script `update_memprof_inputs.sh` avoids this increase in test binary
size.

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[Memprof] Adds the option to collect AccessCountHistograms for memprof. (#94264)

Adds compile time flag -mllvm -memprof-histogram and runtime flag
histogram=true|false to turn Histogram collection

[Memprof] Adds the option to collect AccessCountHistograms for memprof. (#94264)

Adds compile time flag -mllvm -memprof-histogram and runtime flag
histogram=true|false to turn Histogram collection on and off. The
-memprof-histogram flag relies on -memprof-use-callbacks=true to work.

Updates shadow mapping logic in histogram mode from having one 8 byte
counter for 64 bytes, to 1 byte for 8 bytes, capped at 255. Only
supports this granularity as of now.

Updates the RawMemprofReader and serializing MemoryInfoBlocks to binary
format, including changing to a new version of the raw binary format
from version 3 to version 4.

Updates creating MemoryInfoBlocks with and without Histograms. When two
MemoryInfoBlocks are merged, AccessCounts are summed up and the shorter
Histogram is removed.

Adds a memprof_histogram test case.

Initial commit for adding AccessCountHistograms up until RawProfile for
memprof

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[memprof] Record BuildIDs in the raw profile.

This patch adds support for recording BuildIds usng the sanitizer
ListOfModules API. We add another entry to the SegmentEntry struct and
change the memp

[memprof] Record BuildIDs in the raw profile.

This patch adds support for recording BuildIds usng the sanitizer
ListOfModules API. We add another entry to the SegmentEntry struct and
change the memprof raw version.

Reviewed By: tejohnson

Differential Revision: https://reviews.llvm.org/D145190

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Revert "[memprof] Record BuildIDs in the raw profile."

This reverts commit 287177a47a396ca6cc0bef7696108cdaa0c68e5f.

[memprof] Record BuildIDs in the raw profile.

This patch adds support for recording BuildIds usng the sanitizer
ListOfModules API. We add another entry to the SegmentEntry struct and
change the memp

[memprof] Record BuildIDs in the raw profile.

This patch adds support for recording BuildIds usng the sanitizer
ListOfModules API. We add another entry to the SegmentEntry struct and
change the memprof raw version.

Reviewed By: tejohnson

Differential Revision: https://reviews.llvm.org/D145190

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[memprof] Add scripts to automate testdata regeneration.

The memprof profiles and binaries need to be updated in case of version
updates. This change adds three scripts for llvm-profdata, clang and

[memprof] Add scripts to automate testdata regeneration.

The memprof profiles and binaries need to be updated in case of version
updates. This change adds three scripts for llvm-profdata, clang and
llvm tests where memprof profiles are used as inputs. Also update the
tests, profiles and binaries in this change. Change based on the review
suggestions in D145023.

Reviewed By: tejohnson

Differential Revision: https://reviews.llvm.org/D145644

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Revert "[memprof] Refactor tests to generate binaries and profiles on the fly."

This reverts commit 599b7690fa917ea4e9cd67275e34d0b5a0f51aa9. Since
adding a cross project dependency is a concern.

[MemProf] Collect access density statistics during profiling

Track min/max/avg access density (accesses per byte and accesses per
byte per lifetime second) metrics directly during profiling. This al

[MemProf] Collect access density statistics during profiling

Track min/max/avg access density (accesses per byte and accesses per
byte per lifetime second) metrics directly during profiling. This allows
more accurate use of these metrics in profile analysis and use, instead
of trying to compute them from already aggregated data in the profile.

This required regenerating some of the raw profile and executable inputs
for a few tests. While here, make the llvm-profdata memprof tests more
resilient to differences in things like memory mapping, timestamps and
cpu ids to make future test updates easier.

Differential Revision: https://reviews.llvm.org/D141558

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[memprof] Add a test to verify callstack order.

We add to ensure that we are observing the correct callstack order in memprof
during symbolization. There was some confusion whether the order of
DIFr

[memprof] Add a test to verify callstack order.

We add to ensure that we are observing the correct callstack order in memprof
during symbolization. There was some confusion whether the order of
DIFrame objects were reversed but in reality the leaf function is at
index 0 so no code changes are required.

Differential Revision: https://reviews.llvm.org/D121759

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