Code review comment for ~vpa1977/ubuntu/+source/openjdk-lts:lp2003820-native-debug

Note, we already have an issue with NMT dumps (will raise a bug after investigation) - callsites are not resolved. This is not a regression:
Using 11.0.18+10-0ubuntu3:

/usr/lib/jvm/java-11-openjdk-amd64/bin/java -XX:NativeMemoryTracking=detail -cp . infinite&
[1] 4739
/usr/lib/jvm/java-11-openjdk-amd64/bin/jcmd 4739 VM.native_memory detail
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4739:

Native Memory Tracking:

Total: reserved=2415496KB, committed=131892KB
- Java Heap (reserved=1005568KB, committed=65536KB)
                            (mmap: reserved=1005568KB, committed=65536KB)

- Class (reserved=1056874KB, committed=4970KB)
                            (classes #478)
                            ( instance classes #413, array classes #65)
                            (malloc=106KB #517)
                            (mmap: reserved=1056768KB, committed=4864KB)
                            ( Metadata: )
                            ( reserved=8192KB, committed=4352KB)
                            ( used=146KB)
                            ( free=4206KB)
                            ( waste=0KB =0.00%)
                            ( Class space:)
                            ( reserved=1048576KB, committed=512KB)
                            ( used=5KB)
                            ( free=507KB)
                            ( waste=0KB =0.00%)

- Thread (reserved=17486KB, committed=842KB)
                            (thread #17)
                            (stack: reserved=17408KB, committed=764KB)
                            (malloc=60KB #104)
                            (arena=18KB #32)

- Code (reserved=247724KB, committed=7584KB)
                            (malloc=36KB #394)
                            (mmap: reserved=247688KB, committed=7548KB)

- GC (reserved=74681KB, committed=39797KB)
                            (malloc=4465KB #704)
                            (mmap: reserved=70216KB, committed=35332KB)

- Compiler (reserved=136KB, committed=136KB)
                            (malloc=4KB #51)
                            (arena=133KB #5)

- Internal (reserved=556KB, committed=556KB)
                            (malloc=524KB #931)
                            (mmap: reserved=32KB, committed=32KB)

- Symbol (reserved=1038KB, committed=1038KB)
                            (malloc=678KB #16)
                            (arena=360KB #1)

- Native Memory Tracking (reserved=276KB, committed=276KB)
                            (malloc=166KB #2361)
                            (tracking overhead=110KB)

- Shared class space (reserved=10872KB, committed=10872KB)
                            (mmap: reserved=10872KB, committed=10872KB)

- Arena Chunk (reserved=173KB, committed=173KB)
                            (malloc=173KB)

- Logging (reserved=4KB, committed=4KB)
                            (malloc=4KB #192)

- Arguments (reserved=18KB, committed=18KB)
                            (malloc=18KB #489)

- Module (reserved=59KB, committed=59KB)
                            (malloc=59KB #1043)

- Synchronizer (reserved=21KB, committed=21KB)
                            (malloc=21KB #177)

- Safepoint (reserved=8KB, committed=8KB)
                            (mmap: reserved=8KB, committed=8KB)

Virtual memory map:

[0x00000000c2a00000 - 0x0000000100000000] reserved 1005568KB for Java Heap from
    [0x00007fb273aa1b0f]
    [0x00007fb273aa281c]
    [0x00007fb273aa2abe]
    [0x00007fb273a647e2]

 [0x00000000c2a00000 - 0x00000000c6800000] committed 63488KB from
            [0x00007fb273397e45]
            [0x00007fb273398228]
            [0x00007fb2733a34a7]
            [0x00007fb2734288b8]

 [0x00000000ffe00000 - 0x00000000ffe48000] committed 288KB from
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