support Ruby 3.0.x

HEAP_PAGE_SIZE no longer estimates malloc overhead in Ruby 3.0.x,
but we can now rely on the GC::INTERNAL_CONSTANTS hash to access
the true value.

We also need to account for Ractors in 3.0+, and thus we need to
rely on thread-specific `ruby_current_ec' instead of process-wide
`ruby_current_execution_context_ptr' (which no longer exists in
3.0+).

Finally, the VM seems prone to making some small immortal
allocations in a few places we were not expecting in 2.7 and
earlier.  Account for that and loosen some exact checks to
account for it.

Tested on Ruby 3.0.3 and 3.0.4

1 files changed, 16 insertions, 11 deletions

diff --git a/test/test_mwrap.rb b/test/test_mwrap.rb
index 48fba23..fadaef6 100644
--- a/test/test_mwrap.rb
+++ b/test/test_mwrap.rb
@@ -29,7 +29,8 @@ class TestMwrap < Test::Unit::TestCase
       tmp.rewind
       lines = tmp.readlines
       line_1 = lines.grep(/\s-e:1\b/)[0].strip
-      assert_equal '10001', line_1.split(/\s+/)[0]
+      bytes = line_1.split(/\s+/)[0].to_i
+      assert_operator bytes, :>=, 10001
     end
   end
 
@@ -42,7 +43,7 @@ class TestMwrap < Test::Unit::TestCase
       res = system(env, *cmd, { 5 => tmp })
       assert res, $?.inspect
       tmp.rewind
-      assert_match(/\b10001\s+1\s+-e:1$/, tmp.read)
+      assert_match(/\b1\d{4}\s+[1-9]\d*\s+-e:1$/, tmp.read)
 
       env['MWRAP'] = 'dump_fd:1,dump_min:10000'
       tmp.rewind
@@ -50,14 +51,14 @@ class TestMwrap < Test::Unit::TestCase
       res = system(env, *cmd, { 1 => tmp })
       assert res, $?.inspect
       tmp.rewind
-      assert_match(/\b10001\s+1\s+-e:1$/, tmp.read)
+      assert_match(/\b1\d{4}\s+[1-9]\d*\s+-e:1$/, tmp.read)
 
       tmp.rewind
       tmp.truncate(0)
       env['MWRAP'] = "dump_path:#{tmp.path},dump_min:10000"
       res = system(env, *cmd)
       assert res, $?.inspect
-      assert_match(/\b10001\s+1\s+-e:1$/, tmp.read)
+      assert_match(/\b1\d{4}\s+[1-9]\d*\s+-e:1$/, tmp.read)
 
       tmp.rewind
       tmp.truncate(0)
@@ -98,7 +99,7 @@ class TestMwrap < Test::Unit::TestCase
       tmp.rewind
       buf = tmp.read
       assert_not_match(/\s+-e:1$/, buf)
-      assert_match(/\b20001\s+1\s+-e:3$/, buf)
+      assert_match(/\b2\d{4}\s+[0-9]\d*\s+-e:3$/, buf)
     end
   end
 
@@ -176,8 +177,8 @@ class TestMwrap < Test::Unit::TestCase
       -e GC.disable
       -e keep=("0"*10000)
       -e loc=Mwrap["-e:3"]
-      -e loc.each{|size,gen|p([size,gen,count])}
-    )
+      -e
+    ) + [ 'loc.each{|size,gen|p([size,gen,count]) if size > 10000}' ]
     buf = IO.popen(@@env, cmd, &:read)
     assert_predicate $?, :success?
     assert_match(/\A\[\s*\d+,\s*\d+,\s*\d+\]\s*\z/s, buf)
@@ -230,7 +231,8 @@ class TestMwrap < Test::Unit::TestCase
       loc.name == k or abort 'SourceLocation#name broken'
       loc.total >= 10000 or abort 'SourceLocation#total broken'
       loc.frees == 0 or abort 'SourceLocation#frees broken'
-      loc.allocations == 1 or abort 'SourceLocation#allocations broken'
+      loc.allocations >= 1 or
+        abort "SourceLocation#allocations broken: #{loc.allocations}"
       seen = false
       loc.each do |*x| seen = x end
       seen[1] == loc.total or 'SourceLocation#each broken'
@@ -240,7 +242,9 @@ class TestMwrap < Test::Unit::TestCase
       freed = false
       until freed
         freed = true
-        loc.each do freed = false end
+        loc.each do |size, gen|
+          freed = false if size >= 10000
+        end
       end
       loc.frees == 1 or abort 'SourceLocation#frees broken (after free)'
       Float === loc.mean_lifespan or abort 'mean_lifespan broken'
@@ -264,8 +268,9 @@ class TestMwrap < Test::Unit::TestCase
     assert_separately(+"#{<<~"begin;"}\n#{<<~'end;'}")
     begin;
       require 'mwrap'
-      before = __LINE__
+      before = nil
       res = Mwrap.quiet do |depth|
+        before = __LINE__
         depth == 1 or abort 'depth is not 1'
         ('a' * 10000).clear
         Mwrap.quiet { |d| d == 2 or abort 'depth is not 2' }
@@ -304,7 +309,7 @@ class TestMwrap < Test::Unit::TestCase
         gen <= GC.count && gen >= 0 or abort "bad generation: #{gen}"
         (0 == (addr & 16383)) or abort "addr not aligned: #{'%x' % addr}"
       end
-      nr == ap or abort 'HeapPageBody.each missed page'
+      nr == ap or abort "HeapPageBody.each missed page #{nr} != #{ap}"
       10.times { (1..20000).to_a.map(&:to_s) }
       3.times { GC.start }
       Mwrap::HeapPageBody.stat(h)