dtrace: x64 ustack helper

1 files changed, 35 insertions, 17 deletions

diff --git a/tools/genv8constants.py b/tools/genv8constants.py
index efc644152d..fb8b5ffa8c 100755
--- a/tools/genv8constants.py
+++ b/tools/genv8constants.py
@@ -18,8 +18,10 @@ if len(sys.argv) != 3:
 outfile = file(sys.argv[1], 'w');
 pipe = subprocess.Popen([ 'objdump', '-z', '-D', sys.argv[2] ],
     bufsize=-1, stdout=subprocess.PIPE).stdout;
-pattern = re.compile('00000000 <(v8dbg_.*)>:');
-numpattern = re.compile('[0-9a-fA-F]{2}');
+pattern = re.compile('(00000000|0000000000000000) <(.*)>:');
+v8dbg = re.compile('^v8dbg.*$')
+numpattern = re.compile('^[0-9a-fA-F]{2} $');
+octets = 4
 
 outfile.write("""
 /*
@@ -32,13 +34,27 @@ outfile.write("""
 #ifndef V8_CONSTANTS_H
 #define V8_CONSTANTS_H
 
-#if defined(__i386)
 """);
 
 curr_sym = None;
 curr_val = 0;
 curr_octet = 0;
 
+def out_reset():
+  global curr_sym, curr_val, curr_octet
+  curr_sym = None;
+  curr_val = 0;
+  curr_octet = 0;
+
+def out_define():
+  global curr_sym, curr_val, curr_octet, outfile, octets
+  if curr_sym != None:
+    if curr_val & 0x80000000 != 0:
+      outfile.write("#define %s -0x%x\n" % (curr_sym.upper(), 0x100000000 - curr_val));
+    else:
+      outfile.write("#define %s 0x%x\n" % (curr_sym.upper(), curr_val));
+  out_reset();
+
 for line in pipe:
   if curr_sym != None:
     #
@@ -51,32 +67,34 @@ for line in pipe:
     for i in range (0, 3):
       # 6-character margin, 2-characters + 1 space for each field
       idx = 6 + i * 3;
-      octetstr = line[idx:idx+2]
+      octetstr = line[idx:idx+3]
       if not numpattern.match(octetstr):
         break;
 
+      if curr_octet > octets:
+        break;
+
       curr_val += int('0x%s' % octetstr, 16) << (curr_octet * 8);
       curr_octet += 1;
 
-    if curr_octet < 4:
-      continue;
-
-    outfile.write("#define %s 0x%x\n" % (curr_sym.upper(), curr_val));
-    curr_sym = None;
-    curr_val = 0;
-    curr_octet = 0;
-    continue;
-
   match = pattern.match(line)
   if match == None:
     continue;
 
-  curr_sym = match.group(1);
+  octets = len(match.group(1)) / 2;
+
+  # Print previous symbol
+  out_define();
+
+  v8match = v8dbg.match(match.group(2));
+  if v8match != None:
+    out_reset();
+    curr_sym = match.group(2);
+
+# Print last symbol
+out_define();
 
 outfile.write("""
-#else
-#error "only i386 is supported for DTrace ustack helper"
-#endif
 
 #endif /* V8_CONSTANTS_H */
 """);