RFR: 8299973: Replace NULL with nullptr in share/utilities/

[Johan Sjölen]

On Mon, 16 Jan 2023 19:22:43 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

> Do the conversion in the share/utilities sub-directory and all of its files.

Opening this up for review now. Please look at the manual fixes commits for were I made my own decisions (had to make more than I have had to so far).

Running tests right now.

src/hotspot/share/utilities/debug.cpp line 425:

> 423:   CodeBlob* cb = CodeCache::find_blob((address)p);
> 424:   if (cb == nullptr) {
> 425:     tty->print_cr("nullptr");

Changes log, OK?

src/hotspot/share/utilities/globalDefinitions.cpp line 162:

> 160:   static_assert((size_t)HeapWordSize >= sizeof(juint),
> 161:                 "HeapWord should be at least as large as juint");
> 162:   static_assert(sizeof(nullptr) == sizeof(char*), "nullptr must be same size as pointer");

Adding in another static_assert here so that both cases are represented.

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PR: https://git.openjdk.org/jdk/pull/12015