1 files changed, 0 insertions, 192 deletions

diff --git a/lib/bc.lua b/lib/bc.lua
deleted file mode 100644
index 15317bcd..00000000
--- a/lib/bc.lua
+++ /dev/null
@@ -1,192 +0,0 @@
-----------------------------------------------------------------------------
--- LuaJIT bytecode listing module.
---
--- Copyright (C) 2005-2012 Mike Pall. All rights reserved.
--- Released under the MIT license. See Copyright Notice in luajit.h
-----------------------------------------------------------------------------
---
--- This module lists the bytecode of a Lua function. If it's loaded by -jbc
--- it hooks into the parser and lists all functions of a chunk as they
--- are parsed.
---
--- Example usage:
---
---   luajit -jbc -e 'local x=0; for i=1,1e6 do x=x+i end; print(x)'
---   luajit -jbc=- foo.lua
---   luajit -jbc=foo.list foo.lua
---
--- Default output is to stderr. To redirect the output to a file, pass a
--- filename as an argument (use '-' for stdout) or set the environment
--- variable LUAJIT_LISTFILE. The file is overwritten every time the module
--- is started.
---
--- This module can also be used programmatically:
---
---   local bc = require("jit.bc")
---
---   local function foo() print("hello") end
---
---   bc.dump(foo)           --> -- BYTECODE -- [...]
---   print(bc.line(foo, 2)) --> 0002    KSTR     1   1      ; "hello"
---
---   local out = {
---     -- Do something with each line:
---     write = function(t, ...) io.write(...) end,
---     close = function(t) end,
---     flush = function(t) end,
---   }
---   bc.dump(foo, out)
---
-------------------------------------------------------------------------------
-
--- Cache some library functions and objects.
-local jit = require("jit")
-assert(jit.version_num == 20000, "LuaJIT core/library version mismatch")
-local jutil = require("jit.util")
-local vmdef = require("jit.vmdef")
-local bit = require("bit")
-local sub, gsub, format = string.sub, string.gsub, string.format
-local byte, band, shr = string.byte, bit.band, bit.rshift
-local funcinfo, funcbc, funck = jutil.funcinfo, jutil.funcbc, jutil.funck
-local funcuvname = jutil.funcuvname
-local bcnames = vmdef.bcnames
-local stdout, stderr = io.stdout, io.stderr
-
-------------------------------------------------------------------------------
-
-local function ctlsub(c)
-  if c == "\n" then return "\\n"
-  elseif c == "\r" then return "\\r"
-  elseif c == "\t" then return "\\t"
-  elseif c == "\r" then return "\\r"
-  else return format("\\%03d", byte(c))
-  end
-end
-
--- Return one bytecode line.
-local function bcline(func, pc, prefix)
-  local ins, m = funcbc(func, pc)
-  if not ins then return end
-  local ma, mb, mc = band(m, 7), band(m, 15*8), band(m, 15*128)
-  local a = band(shr(ins, 8), 0xff)
-  local oidx = 6*band(ins, 0xff)
-  local op = sub(bcnames, oidx+1, oidx+6)
-  local s = format("%04d %s %-6s %3s ",
-    pc, prefix or "  ", op, ma == 0 and "" or a)
-  local d = shr(ins, 16)
-  if mc == 13*128 then -- BCMjump
-    return format("%s=> %04d\n", s, pc+d-0x7fff)
-  end
-  if mb ~= 0 then
-    d = band(d, 0xff)
-  elseif mc == 0 then
-    return s.."\n"
-  end
-  local kc
-  if mc == 10*128 then -- BCMstr
-    kc = funck(func, -d-1)
-    kc = format(#kc > 40 and '"%.40s"~' or '"%s"', gsub(kc, "%c", ctlsub))
-  elseif mc == 9*128 then -- BCMnum
-    kc = funck(func, d)
-    if op == "TSETM " then kc = kc - 2^52 end
-  elseif mc == 12*128 then -- BCMfunc
-    local fi = funcinfo(funck(func, -d-1))
-    if fi.ffid then
-      kc = vmdef.ffnames[fi.ffid]
-    else
-      kc = fi.loc
-    end
-  elseif mc == 5*128 then -- BCMuv
-    kc = funcuvname(func, d)
-  end
-  if ma == 5 then -- BCMuv
-    local ka = funcuvname(func, a)
-    if kc then kc = ka.." ; "..kc else kc = ka end
-  end
-  if mb ~= 0 then
-    local b = shr(ins, 24)
-    if kc then return format("%s%3d %3d  ; %s\n", s, b, d, kc) end
-    return format("%s%3d %3d\n", s, b, d)
-  end
-  if kc then return format("%s%3d      ; %s\n", s, d, kc) end
-  if mc == 7*128 and d > 32767 then d = d - 65536 end -- BCMlits
-  return format("%s%3d\n", s, d)
-end
-
--- Collect branch targets of a function.
-local function bctargets(func)
-  local target = {}
-  for pc=1,1000000000 do
-    local ins, m = funcbc(func, pc)
-    if not ins then break end
-    if band(m, 15*128) == 13*128 then target[pc+shr(ins, 16)-0x7fff] = true end
-  end
-  return target
-end
-
--- Dump bytecode instructions of a function.
-local function bcdump(func, out, all)
-  if not out then out = stdout end
-  local fi = funcinfo(func)
-  if all and fi.children then
-    for n=-1,-1000000000,-1 do
-      local k = funck(func, n)
-      if not k then break end
-      if type(k) == "proto" then bcdump(k, out, true) end
-    end
-  end
-  out:write(format("-- BYTECODE -- %s-%d\n", fi.loc, fi.lastlinedefined))
-  local target = bctargets(func)
-  for pc=1,1000000000 do
-    local s = bcline(func, pc, target[pc] and "=>")
-    if not s then break end
-    out:write(s)
-  end
-  out:write("\n")
-  out:flush()
-end
-
-------------------------------------------------------------------------------
-
--- Active flag and output file handle.
-local active, out
-
--- List handler.
-local function h_list(func)
-  return bcdump(func, out)
-end
-
--- Detach list handler.
-local function bclistoff()
-  if active then
-    active = false
-    jit.attach(h_list)
-    if out and out ~= stdout and out ~= stderr then out:close() end
-    out = nil
-  end
-end
-
--- Open the output file and attach list handler.
-local function bcliston(outfile)
-  if active then bclistoff() end
-  if not outfile then outfile = os.getenv("LUAJIT_LISTFILE") end
-  if outfile then
-    out = outfile == "-" and stdout or assert(io.open(outfile, "w"))
-  else
-    out = stderr
-  end
-  jit.attach(h_list, "bc")
-  active = true
-end
-
--- Public module functions.
-module(...)
-
-line = bcline
-dump = bcdump
-targets = bctargets
-
-on = bcliston
-off = bclistoff
-start = bcliston -- For -j command line option.
-