Hi, Sergey,

thanks for the patch! LGTM

Sergey

This commit adds the missed support for the full-range 64-bit light
userdata, which was lost during lldb extension implementation. The
corresponding entries for the test of lj-tv are sorted according to LJT*
types.
---
 src/luajit_lldb.py                            | 20 +++++++++++++-
 .../debug-extension-tests.py                  | 27 ++++++++++++-------
 2 files changed, 36 insertions(+), 11 deletions(-)

diff --git a/src/luajit_lldb.py b/src/luajit_lldb.py
index 7668a94c..e3fe82fc 100644
--- a/src/luajit_lldb.py
+++ b/src/luajit_lldb.py
@@ -18,6 +18,12 @@ IRT_P64 = 9
 LJ_GCVMASK = ((1 << 47) - 1)
 LJ_TISNUM = None
 
+# These constants are meaningful only for 'LJ_64' mode.
+LJ_LIGHTUD_BITS_SEG = 8
+LJ_LIGHTUD_BITS_LO = 47 - LJ_LIGHTUD_BITS_SEG
+LIGHTUD_SEG_MASK = (1 << LJ_LIGHTUD_BITS_SEG) - 1
+LIGHTUD_LO_MASK = (1 << LJ_LIGHTUD_BITS_LO) - 1
+
 # Debugger specific {{{
 
 
@@ -440,6 +446,18 @@ def tvisnumber(o):
     return itype(o) <= LJ_TISNUM
 
 
+def lightudV(tv):
+    if LJ_64:
+        u = int(tv['u64'])
+        # lightudseg macro expanded.
+        seg = (u >> LJ_LIGHTUD_BITS_LO) & LIGHTUD_SEG_MASK
+        segmap = mref('uint32_t *', G(L(None))['gc']['lightudseg'])
+        # lightudlo macro expanded.
+        return (int(segmap[seg]) << 32) | (u & LIGHTUD_LO_MASK)
+    else:
+        return gcval(tv['gcr'])
+
+
 def dump_lj_tnil(tv):
     return 'nil'
 
@@ -453,7 +471,7 @@ def dump_lj_ttrue(tv):
 
 
 def dump_lj_tlightud(tv):
-    return 'light userdata @ {}'.format(strx64(gcval(tv['gcr'])))
+    return 'light userdata @ {}'.format(strx64(lightudV(tv)))
 
 
 def dump_lj_tstr(tv):
diff --git a/test/tarantool-debugger-tests/debug-extension-tests.py b/test/tarantool-debugger-tests/debug-extension-tests.py
index f3ce3ced..2b67e151 100644
--- a/test/tarantool-debugger-tests/debug-extension-tests.py
+++ b/test/tarantool-debugger-tests/debug-extension-tests.py
@@ -211,23 +211,28 @@ class TestLJTV(TestCaseBase):
         'lj-tv L->base + 9\n'
         'lj-tv L->base + 10\n'
         'lj-tv L->base + 11\n'
+        'lj-tv L->base + 12\n'
+        'lj-tv L->base + 13\n'
     )
 
+    # Sorted in LJT order.
     lua_script = (
         'local ffi = require("ffi")\n'
         'print(\n'
         '  nil,\n'
         '  false,\n'
         '  true,\n'
+        '  debug.upvalueid(print, 1), \n'  # lightuserdata
         '  "hello",\n'
-        '  {1},\n'
-        '  1,\n'
-        '  1.1,\n'
         '  coroutine.create(function() end),\n'
-        '  ffi.new("int*"),\n'
         '  function() end,\n'
+        '  require,\n'
         '  print,\n'
-        '  require\n'
+        '  ffi.new("int*"),\n'
+        '  {1},\n'
+        '  newproxy(),\n'
+        '  1,\n'
+        '  1.1\n'
         ')\n'
     )
 
@@ -235,15 +240,17 @@ class TestLJTV(TestCaseBase):
         r'nil\n'
         r'false\n'
         r'true\n'
+        r'light userdata @ ' + RX_ADDR + r'\n'
         r'string \"hello\" @ ' + RX_ADDR + r'\n'
-        r'table @ ' + RX_ADDR + r' \(asize: \d+, hmask: ' + RX_HASH + r'\)\n'
-        r'(number|integer) .*1.*\n'
-        r'number 1.1\d+\n'
         r'thread @ ' + RX_ADDR + r'\n'
-        r'cdata @ ' + RX_ADDR + r'\n'
         r'Lua function @ ' + RX_ADDR + r', [0-9]+ upvalues, .+:[0-9]+\n'
-        r'fast function #[0-9]+\n'
         r'C function @ ' + RX_ADDR + r'\n'
+        r'fast function #[0-9]+\n'
+        r'cdata @ ' + RX_ADDR + r'\n'
+        r'table @ ' + RX_ADDR + r' \(asize: \d+, hmask: ' + RX_HASH + r'\)\n'
+        r'userdata @ ' + RX_ADDR + r'\n'
+        r'(number|integer) .*1.*\n'
+        r'number 1.1\d+\n'
     )