[llvm] [memprof] Simplify readMemprof (NFC) (PR #119930)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux` running on `sanitizer-buildbot8` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/51/builds/7665

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure) (timed out)
...
[181/186] Generating MSAN_INST_GTEST.gtest-all.cc.aarch64.o
[182/186] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.aarch64-with-call.o
[183/186] Generating Msan-aarch64-with-call-Test
[184/186] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.aarch64.o
[185/186] Generating Msan-aarch64-Test
[185/186] Running compiler_rt regression tests
llvm-lit: /home/b/sanitizer-aarch64-linux/build/llvm-project/llvm/utils/lit/lit/discovery.py:276: warning: input '/home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/interception/Unit' contained no tests
llvm-lit: /home/b/sanitizer-aarch64-linux/build/llvm-project/llvm/utils/lit/lit/discovery.py:276: warning: input '/home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/Unit' contained no tests
llvm-lit: /home/b/sanitizer-aarch64-linux/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 6132 tests, 72 workers --
command timed out: 1200 seconds without output running [b'python', b'../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1654.189913
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
Step 9 (test compiler-rt symbolizer) failure: test compiler-rt symbolizer (failure)
...
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cmath.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/csetjmp.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/csignal.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cstdarg.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cstddef.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cstdint.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cstdio.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cstdlib.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cstring.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/ctime.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cuchar.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cwchar.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat/cwctype.inc
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.cppm
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/share/libc++/v1/std.compat.cppm
-- Installing: /home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/lib/tsan/libcxx_tsan_aarch64/lib/libc++.modules.json
[165/186] Generating libmsan_loadable.aarch64-with-call.so
[166/186] Performing build step for 'libcxx_fuzzer_aarch64'
ninja: no work to do.
[167/186] Installing libcxx_fuzzer_aarch64...
[0/1] Install the project...
-- Install configuration: "Release"
[169/186] Linking CXX static library /home/b/sanitizer-aarch64-linux/build/build_default/lib/clang/20/lib/aarch64-unknown-linux-gnu/libclang_rt.fuzzer_interceptors.a
[170/186] Linking CXX static library /home/b/sanitizer-aarch64-linux/build/build_default/lib/clang/20/lib/aarch64-unknown-linux-gnu/libclang_rt.fuzzer_no_main.a
[171/186] Linking CXX static library /home/b/sanitizer-aarch64-linux/build/build_default/lib/clang/20/lib/aarch64-unknown-linux-gnu/libclang_rt.fuzzer.a
[172/186] Generating MSAN_INST_TEST_OBJECTS.msan_test_main.cpp.aarch64.o
[173/186] Generating MSAN_INST_TEST_OBJECTS.msan_test_main.cpp.aarch64-with-call.o
[174/186] Generating FuzzedDataProviderTestObjects.FuzzedDataProviderUnittest.cpp.aarch64.o
[175/186] Generating FuzzerTestObjects.FuzzerUnittest.cpp.aarch64.o
[176/186] Generating FuzzedDataProviderTestObjects.gtest-all.cc.aarch64.o
[177/186] Generating FuzzerUtils-aarch64-Test
[178/186] Generating FuzzerTestObjects.gtest-all.cc.aarch64.o
[179/186] Generating Fuzzer-aarch64-Test
[180/186] Generating MSAN_INST_GTEST.gtest-all.cc.aarch64-with-call.o
[181/186] Generating MSAN_INST_GTEST.gtest-all.cc.aarch64.o
[182/186] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.aarch64-with-call.o
[183/186] Generating Msan-aarch64-with-call-Test
[184/186] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.aarch64.o
[185/186] Generating Msan-aarch64-Test
[185/186] Running compiler_rt regression tests
llvm-lit: /home/b/sanitizer-aarch64-linux/build/llvm-project/llvm/utils/lit/lit/discovery.py:276: warning: input '/home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/interception/Unit' contained no tests
llvm-lit: /home/b/sanitizer-aarch64-linux/build/llvm-project/llvm/utils/lit/lit/discovery.py:276: warning: input '/home/b/sanitizer-aarch64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/Unit' contained no tests
llvm-lit: /home/b/sanitizer-aarch64-linux/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 6132 tests, 72 workers --

command timed out: 1200 seconds without output running [b'python', b'../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1654.189913
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..

```

</details>

https://github.com/llvm/llvm-project/pull/119930