Unreviewed, reverting r259390.
https://bugs.webkit.org/show_bug.cgi?id=209944

It broke WinCairo builds (Requested by fujihiro on #webkit).

Reverted changeset:

"Enable offlineasm debug annotations for GCC"
https://bugs.webkit.org/show_bug.cgi?id=207119
https://trac.webkit.org/changeset/259390

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@259436 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/ChangeLog b/ChangeLog
index 226ffee..349dc07 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2020-04-02  Commit Queue  <commit-queue@webkit.org>
+
+        Unreviewed, reverting r259390.
+        https://bugs.webkit.org/show_bug.cgi?id=209944
+
+        It broke WinCairo builds (Requested by fujihiro on #webkit).
+
+        Reverted changeset:
+
+        "Enable offlineasm debug annotations for GCC"
+        https://bugs.webkit.org/show_bug.cgi?id=207119
+        https://trac.webkit.org/changeset/259390
+
 2020-04-01  Don Olmstead  <don.olmstead@sony.com>
 
         [GPUP][PlayStation] Enable GPU Process
diff --git a/Source/JavaScriptCore/CMakeLists.txt b/Source/JavaScriptCore/CMakeLists.txt
index 791b7fe..3ff225e 100644
--- a/Source/JavaScriptCore/CMakeLists.txt
+++ b/Source/JavaScriptCore/CMakeLists.txt
@@ -323,7 +323,7 @@
     OUTPUT ${JavaScriptCore_DERIVED_SOURCES_DIR}/${LLIntOutput}
     MAIN_DEPENDENCY ${JAVASCRIPTCORE_DIR}/offlineasm/asm.rb
     DEPENDS LLIntOffsetsExtractor ${LLINT_ASM} ${OFFLINE_ASM} ${JavaScriptCore_DERIVED_SOURCES_DIR}/InitBytecodes.asm ${JavaScriptCore_DERIVED_SOURCES_DIR}/InitWasm.asm
-    COMMAND ${CMAKE_COMMAND} -E env CMAKE_CXX_COMPILER_ID=${CMAKE_CXX_COMPILER_ID} GCC_OFFLINEASM_SOURCE_MAP=${GCC_OFFLINEASM_SOURCE_MAP} ${RUBY_EXECUTABLE} ${JAVASCRIPTCORE_DIR}/offlineasm/asm.rb -I${JavaScriptCore_DERIVED_SOURCES_DIR}/ ${JAVASCRIPTCORE_DIR}/llint/LowLevelInterpreter.asm $<TARGET_FILE:LLIntOffsetsExtractor> ${JavaScriptCore_DERIVED_SOURCES_DIR}/${LLIntOutput} ${OFFLINE_ASM_ARGS}
+    COMMAND ${RUBY_EXECUTABLE} ${JAVASCRIPTCORE_DIR}/offlineasm/asm.rb -I${JavaScriptCore_DERIVED_SOURCES_DIR}/ ${JAVASCRIPTCORE_DIR}/llint/LowLevelInterpreter.asm $<TARGET_FILE:LLIntOffsetsExtractor> ${JavaScriptCore_DERIVED_SOURCES_DIR}/${LLIntOutput} ${OFFLINE_ASM_ARGS}
     COMMAND ${CMAKE_COMMAND} -E touch_nocreate ${JavaScriptCore_DERIVED_SOURCES_DIR}/${LLIntOutput}
     WORKING_DIRECTORY ${JavaScriptCore_DERIVED_SOURCES_DIR}
     VERBATIM)
@@ -348,17 +348,10 @@
         COMMAND ${MASM_EXECUTABLE} ${LLINT_MASM_FLAGS} ${JavaScriptCore_DERIVED_SOURCES_DIR}/LowLevelInterpreterWin.obj ${JavaScriptCore_DERIVED_SOURCES_DIR}/LowLevelInterpreterWin.asm
         VERBATIM)
     list(APPEND JavaScriptCore_SOURCES ${JavaScriptCore_DERIVED_SOURCES_DIR}/LowLevelInterpreterWin.obj)
-    add_library(LowLevelInterpreterLib OBJECT llint/LowLevelInterpreter.cpp)
 else ()
-    # As there's poor toolchain support for using `.file` directives in
-    # inline asm (i.e. there's no way to avoid clashes with the `.file`
-    # directives generated by the C code in the compilation unit), we
-    # introduce a postprocessing pass for the asm that gets assembled into
-    # an object file. We only need to do this for LowLevelInterpreter.cpp
-    # and cmake doesn't allow us to introduce a compiler wrapper for a
-    # single source file, so we need to create a separate target for it.
-    add_library(LowLevelInterpreterLib OBJECT llint/LowLevelInterpreter.cpp
-        ${JavaScriptCore_DERIVED_SOURCES_DIR}/${LLIntOutput})
+    list(APPEND JavaScriptCore_HEADERS
+        ${JavaScriptCore_DERIVED_SOURCES_DIR}/LLIntAssembly.h
+    )
 endif ()
 
 # WebAssembly generator
@@ -1369,29 +1362,6 @@
 
 add_subdirectory(shell)
 
-target_include_directories(LowLevelInterpreterLib
-    PRIVATE "$<TARGET_PROPERTY:JavaScriptCore,INCLUDE_DIRECTORIES>")
-
-if (CMAKE_COMPILER_IS_GNUCXX AND GCC_OFFLINEASM_SOURCE_MAP)
-    message(STATUS "Enabling asm postprocessing")
-
-    set(LowLevelInterpreter_LAUNCHER "${JavaScriptCore_SCRIPTS_SOURCES_DIR}/postprocess-asm")
-    get_target_property(PROP_RULE_LAUNCH_COMPILE LowLevelInterpreterLib RULE_LAUNCH_COMPILE)
-    if (PROP_RULE_LAUNCH_COMPILE)
-        set(LowLevelInterpreter_LAUNCHER "${LowLevelInterpreter_LAUNCHER} ${PROP_RULE_LAUNCH_COMPILE}")
-    endif ()
-    set_property(TARGET LowLevelInterpreterLib
-        PROPERTY RULE_LAUNCH_COMPILE "${LowLevelInterpreter_LAUNCHER}")
-
-    # Pass in the filename as a magic preprocessor directive, so that
-    # the wrapper can accurately identify the source file.
-    set_source_files_properties("llint/LowLevelInterpreter.cpp"
-        PROPERTIES
-        COMPILE_DEFINITIONS "POSTPROCESS_ASM=llint/LowLevelInterpreter.cpp")
-endif ()
-
-list(APPEND JavaScriptCore_LIBRARIES LowLevelInterpreterLib)
-
 WEBKIT_COMPUTE_SOURCES(JavaScriptCore)
 WEBKIT_WRAP_SOURCELIST(${JavaScriptCore_SOURCES})
 WEBKIT_FRAMEWORK(JavaScriptCore)
diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
index 6bd8ab4c..1d599e8 100644
--- a/Source/JavaScriptCore/ChangeLog
+++ b/Source/JavaScriptCore/ChangeLog
@@ -1,3 +1,16 @@
+2020-04-02  Commit Queue  <commit-queue@webkit.org>
+
+        Unreviewed, reverting r259390.
+        https://bugs.webkit.org/show_bug.cgi?id=209944
+
+        It broke WinCairo builds (Requested by fujihiro on #webkit).
+
+        Reverted changeset:
+
+        "Enable offlineasm debug annotations for GCC"
+        https://bugs.webkit.org/show_bug.cgi?id=207119
+        https://trac.webkit.org/changeset/259390
+
 2020-04-02  Yusuke Suzuki  <ysuzuki@apple.com>
 
         [JSC] RecordedStatuses's assignment should be guarded by CodeBlock's lock
diff --git a/Source/JavaScriptCore/Scripts/postprocess-asm b/Source/JavaScriptCore/Scripts/postprocess-asm
deleted file mode 100755
index df0a312..0000000
--- a/Source/JavaScriptCore/Scripts/postprocess-asm
+++ /dev/null
@@ -1,193 +0,0 @@
-#!/usr/bin/env ruby
-
-# Copyright (C) 2020 Igalia S. L.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
-# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
-# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
-# THE POSSIBILITY OF SUCH DAMAGE.
-
-# Wrapper for a .cpp -> .o compilation command. It
-# 1. converts the command to generate a `.s' file
-# 2. runs the ASM postprocessor on it to generate the final `.s` file
-# 3. assembles the `.s` file to a `.o` file
-
-$asm_suffix_pre = ".pre.s"
-$asm_suffix = ".s"
-$postprocessor = "#{File.dirname($0)}/resolve-asm-file-conflicts.rb"
-
-
-$intermediate_paths = []
-
-# We need to work with indices a lot and unfortunately 'getoptlong' in
-# the standard library doesn't expose optind, so we're going with
-# array searches for simplicity.
-def index_nofail(ary, f, errmsg)
-  idx = ary.index { |el|
-    f.call(el)
-  }
-  if idx.nil?
-    $stderr.puts(errmsg)
-    exit(3)
-  end
-  idx
-end
-
-# Find and return the source file for this compilation command,
-# removing it from the args. Note that the path (A) as it appears here
-# (coming from a cmake rule) is likely to be different to the
-# anonymous argument (B) to the compilation command. However, A will
-# be a suffix of B.
-#
-# Exit with an error if the argument is not there. This has already
-# been checked by `cxx-wrapper`, otherwise we wouldn't be running.
-def extract_input!(args)
-  prefix = '-DPOSTPROCESS_ASM='
-
-  idx = index_nofail(args, Proc.new { |arg|
-    arg.start_with?(prefix)
-  }, "No `-DPOSTPROCESS_ASM` argument`")
-
-  path = args[idx][prefix.size..-1]
-  if path.size == 0
-    $stderr.puts("Empty path in -DPOSTPROCESS_ASM=")
-    exit(3)
-  end
-  # We only need this to be defined for the preprocessor (not any
-  # wrapper) from now on.
-  args[idx] = "-DPOSTPROCESS_ASM"
-  return path
-end
-
-# Get the index of the first argument ending in this suffix.
-#
-# Exit with an error if the argument isn't there. We're only ever
-# called with arguments we know are being passed in by the build
-# system.
-def get_arg_idx_suffix(args, wanted)
-  index_nofail(args, Proc.new { |arg|
-                 arg.end_with?(wanted)
-               }, "No argument ends with #{wanted}")
-end
-
-# Get index of a given argument. Die if it's not there.
-def get_arg_idx(args, wanted)
-  index_nofail(args, Proc.new { |arg|
-                 arg == wanted
-               }, "No `#{wanted}` argument")
-end
-
-# Get the index of `-o` and verify that an argument follows.
-# Both are guaranteed to exist (from our build system).
-def get_o_idx(args)
-  i = get_arg_idx(args, '-o')
-  if (i + 1) >= args.size
-    $stderr.puts("No argument to `-o`")
-    exit(3)
-  end
-  i
-end
-
-# Run command and die if it fails, propagating the exit code.
-def run_cmd(cmd)
-  pid = Process.spawn(*cmd)
-  Process.waitpid(pid)
-  ret = $?
-  if not ret.success?
-    $stderr.puts("Error running cmd: #{ret}")
-    exit(ret.exitstatus)
-  end
-end
-
-# Convert
-#    cxx -o blah.o -c blah.cpp
-# to
-#    cxx -o blah.s -S blah.cpp
-def build_cxx_cmd(args)
-  c_idx = get_arg_idx(args, '-c')
-  o_idx = get_o_idx(args)
-
-  cxx_args = args.clone
-
-  cxx_args[c_idx] = '-S'
-  o_path = cxx_args[o_idx + 1]
-  cxx_args[o_idx + 1] = o_path.sub(/[.]o$/, $asm_suffix)
-  $intermediate_paths << cxx_args[o_idx + 1]
-  if cxx_args[o_idx + 1] == o_path
-    $stderr.puts("Output file name not an object file: `#{o_path}`")
-    exit(3)
-  end
-  cxx_args
-end
-
-# Do
-#     mv blah.S blah.pre.S
-# The reason we do a rename instead of directly generating the .pre.s
-# file when compiling is so that the corresponding .dwo file will have
-# the correct name embedded.
-def rename_s_file(args)
-  o_path = args[get_o_idx(args) + 1]
-  File.rename(o_path.sub(/[.]o$/, $asm_suffix),
-              o_path.sub(/[.]o$/, $asm_suffix_pre))
-end
-
-# Build
-#     postprocessor blah.pre.S blah.S
-def build_postprocessor_cmd(args)
-  o_path = args[get_o_idx(args) + 1]
-
-  pp_args = [
-    $postprocessor,
-    o_path.sub(/[.]o$/, $asm_suffix_pre), # input
-    o_path.sub(/[.]o$/, $asm_suffix) # output
-  ]
-  $intermediate_paths << pp_args[-2]
-  $intermediate_paths << pp_args[-1]
-  pp_args
-end
-
-# Build
-#     cxx -o blah.o -c blah.S
-def build_as_cmd(args, i_path)
-  i_idx = get_arg_idx_suffix(args, i_path)
-  o_path = args[get_o_idx(args) + 1]
-
-  as_args = args.clone
-  i_path = as_args[i_idx]
-  as_args[i_idx] = o_path.sub(/[.]o$/, $asm_suffix)
-  as_args
-end
-
-args = ARGV.to_a
-i_path = extract_input!(args)
-
-begin
-  run_cmd(build_cxx_cmd(args))
-  rename_s_file(args)
-  run_cmd(build_postprocessor_cmd(args))
-  run_cmd(build_as_cmd(args, i_path))
-ensure
-  $intermediate_paths.each { |p|
-    if File.exist?(p)
-      File.delete(p)
-    end
-  }
-end
-
-exit(0)
diff --git a/Source/JavaScriptCore/Scripts/resolve-asm-file-conflicts.rb b/Source/JavaScriptCore/Scripts/resolve-asm-file-conflicts.rb
deleted file mode 100755
index 21832d8..0000000
--- a/Source/JavaScriptCore/Scripts/resolve-asm-file-conflicts.rb
+++ /dev/null
@@ -1,399 +0,0 @@
-#!/usr/bin/env ruby
-
-# Copyright (C) 2020 Igalia S. L.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
-# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
-# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
-# THE POSSIBILITY OF SUCH DAMAGE.
-
-# Resolve conflicts in `.file` directives in assembler files. Those
-# may result from inline asm statements which themselves have `.file`
-# directives. As the inline asm has no idea what the next free file
-# number is, it'll generally have its own numbering. To get things to
-# work we have to
-# 1. remap conflicting file numbers
-# 2. change `.loc` directives to reference the appropriate file number.
-#
-# To be able to do that, we need some concept of "scope", i.e. which
-# set of files a given `.loc` directive refers to. We get that by
-# tracking the #APP/#NOAPP directives that the compiler emits when it
-# switch to/from inline asm.
-#
-# In effect, we convert
-#     .file 1 "foo"
-#     #APP
-#     .file 1 "bar"
-#     .file 2 "foo"
-#     .loc 1, X
-#     #NOAPP
-#     .loc 1, Y
-# to
-#     .file 1 "foo"
-#     #APP
-#     .file 2 "bar"
-#     .file 1 "foo"
-#     .loc 2, X
-#     #NOAPP
-#     .loc 1, Y
-
-require 'pathname'
-require 'stringio'
-require 'strscan'
-
-ParseResultSuccess = Struct.new(:str)
-ParseResultError = Struct.new(:error)
-
-# Parses the single string literal following a .file assembler directive
-class FileDirectiveArgScanner
-  def initialize(s)
-    @s = StringScanner.new(s)
-  end
-  def parse
-    @s.skip(/\s*/)
-
-    # We require at least one string literal
-    ret = parse_string_literal
-    if ret.respond_to?(:error)
-      return ret
-    end
-
-    @s.skip(/\s*/)
-    if not @s.eos?
-      return ParseResultError.new("Expected end of line after #{ret.str}")
-    end
-    return ParseResultSuccess.new(ret.str)
-  end
-  def parse_string_literal
-    if @s.scan(/"/).nil?
-      err = "Expected string literal at `#{@s.string}` (pos #{@s.pos})"
-      return ParseResultError.new(err)
-    end
-    parse_until_end_of_string_literal
-  end
-  def parse_until_end_of_string_literal
-    start_pos = @s.pos
-    while true
-      # Search for our special characters
-      @s.skip(/[^"\\]+/)
-      if @s.scan(/\\/)
-        if @s.scan(/\\/)
-          # When we see '\\', consume both characters so that the
-          # second '\' will not be treated as an escape char.
-          next
-        elsif @s.scan(/"/)
-          # For '\"', consume both characters so that the '"' will not
-          # terminate the string.
-          next
-        end
-        next
-      elsif @s.scan(/"/)
-        # '"' without a preceeding '\'; terminate the literal.
-        # We're already past the '"', so the literal ends at -2
-        # characters.
-        return ParseResultSuccess.new(@s.string[start_pos..(@s.pos - 2)])
-      elsif @s.eos?
-        err = "Unterminated string literal (starting at pos #{start_pos} in #{@s.string}"
-        return ParseResultError.new(err)
-      end
-      raise "Internal error (#{@s.inspect})"
-    end
-  end
-end
-
-def test(outf, str, res)
-  pr = FileDirectiveArgScanner.new(str).parse
-  if res.is_a?(Array)
-    if pr.respond_to?(:error)
-      outf.puts("Parse result is `#{pr.error}` but expected #{res}")
-      return false
-    end
-    if pr.str != res[0]
-      outf.puts("Parsed path `#{pr.str}` but expected `#{res[0]}`")
-      return false
-    end
-    return true
-  elsif res.is_a?(String)
-    if pr.respond_to?(:error)
-      if not pr.error.downcase.include?(res.downcase)
-        err = "Error message `#{pr.error}` does not include expected substring `#{res}`"
-        outf.puts(err)
-        return false
-      end
-      return true
-    end
-    outf.puts("Expected error (#{res}) but got successful parse #{pr.str}")
-    return false
-  else
-    raise "Internal error #{res.class}"
-  end
-end
-
-def selftest
-  nr_succeeded = 0
-  tests = [
-    # simple string
-    ['"foo/bar"', ["foo/bar"]],
-
-    ['"foo', "Unterminated string literal"],
-
-    ['"foo\"', "Unterminated string literal"],
-
-    # "foo\"
-    ["\"foo\\\"", "Unterminated string literal"],
-
-    # "foo\\"
-    ["\"foo\\\\\"", ["foo\x5c\x5c"]],
-
-    # Can escape '"'
-    ['"foo\"bar"', ['foo\"bar']],
-
-    # Can parse relative
-    ['"foo/bar"', ['foo/bar']],
-
-    # Can parse absolute
-    ['"/bar"', ['/bar']],
-
-    # Can parse absolute with two components
-    ['"/bar/baz"', ['/bar/baz']],
-
-    # Can detect stray token
-    ['"foo" bar', "Expected end of line"],
-
-    # Can detect stray token without whitespace
-    ['"foo"bar', "Expected end of line"],
-
-    # Will not accept clang-style .file directives
-    ['"working_directory" "path"', "Expected end of line"]
-  ]
-  outf = StringIO.new("")
-  tests.each { |str, res|
-    if test(outf, str, res)
-      nr_succeeded += 1
-    end
-  }
-  if nr_succeeded != tests.size
-    $stderr.puts(outf.string)
-    $stderr.puts("Some self tests failed #{nr_succeeded}/#{tests.size}")
-    exit(3)
-  end
-end
-
-# Keep track of which fileno is assigned to which file path. We call
-# the fileno a 'slot'.
-class FileSlotTracker
-  @@next_free = 1   # Next free global slot
-  @@paths = {} # Maps path -> global slot
-  def initialize(parent)
-    @parent = parent
-    # This maps from our own local slots (i.e. within an APP section)
-    # to a global slot.
-    @slot_map = {}
-  end
-  # We make sure that .file directives that specify the same path are
-  # dedup'd, i.e. if we see
-  #     .file N "/path/to/include.h"
-  #     ...
-  #     .file M "/path/to/include.h"
-  # then the "local" N, M slots will be mapped to the same "global" slot.
-  def register_path(path, slot)
-    curr_slot = @@paths[path]
-    if curr_slot.nil?
-      # We haven't seen this file before
-      if slot <= @@next_free
-        # Desired file slot either clashes with an existing one, or is
-        # the next one to be allocated. In either case, assign the
-        # next free slot.
-        assign_next_slot(path)
-      else
-        # Don't allow slot gaps. Technically we could handle them, but
-        # they should never happen; bail now rather than papering over
-        # an earlier error.
-        $stderr.puts("File wants slot #{slot} but only seen #{@@next_free} so far")
-        exit(2)
-      end
-    else
-      # We've already assigned a slot for this file.
-    end
-    @slot_map[slot] = @@paths[path]
-    if @slot_map[slot].nil?
-      raise "Didn't map local slot #{slot}"
-    end
-  end
-  # Return global slot for path
-  def slot_for_path(path)
-    return @@paths[path]
-  end
-  # Return global slot that will replace the local slot
-  def remap_slot(slot)
-    ret = nil
-    if @slot_map.size > 0
-      # If the current NO_APP segment has defined a .file, only look
-      # in the current FileSlotTracker. This is the case for a
-      # top-level inline asm statement.
-      ret = @slot_map[slot]
-    elsif not @parent.nil?
-      # If the current NO_APP segment has not defined a .file, clearly
-      # all .loc directives refer to files defined in the APP
-      # part. This is the case for non-top-level inline asm
-      # statements.
-      ret = @parent.remap_slot(slot)
-    end
-    if ret.nil?
-      raise "No global slot for #{slot}"
-    end
-    ret
-  end
-  private
-  def assign_next_slot(path)
-    @@paths[path] = @@next_free
-    @@next_free += 1
-  end
-end
-
-# Return sequential lines, while keeping track of whether we're in an
-# #APP or #NOAPP section.
-class AsmReader
-  attr_reader :in_app
-  attr_accessor :app_to_noapp, :noapp_to_app
-  def initialize(f)
-    @f = f
-    @f.rewind
-    @linenr = 0
-    @in_app = false
-    @last_switch = "start of file" # For error messages
-  end
-  def next_line
-    while true
-      l = @f.gets
-      if l.nil?
-        return l
-      end
-      @linenr += 1
-      if /^#\s*APP\s*/.match(l)
-        if @in_app
-          raise "#APP on line #{@linenr} but already in #APP (#{@last_switch})"
-        end
-        @in_app = true
-        @last_switch = @linenr
-        if @noapp_to_app
-          @noapp_to_app.call()
-        end
-      end
-      if /^#\s*NO_APP\s*/.match(l)
-        if not @in_app
-          raise "#NOAPP on line #{@linenr} but was not in #APP (last swich at #{@last_switch})"
-        end
-        @in_app = false
-        @last_switch = @linenr
-        if @app_to_noapp
-          @app_to_noapp.call()
-        end
-      end
-      return l
-    end
-  end
-end
-
-class FileConflictResolver
-  @@file_re = /^\s*[.]file\s+(?<slot>\d+)\s+(?<rest>.*)$/
-  @@loc_re = /^(?<white1>\s*)[.]loc(?<white2>\s+)(?<slot>\d+)(?<rest>\s+\d+.*)$/
-  def initialize(inf, outf)
-    @outf = outf
-    @trackers = [FileSlotTracker.new(nil)]
-    @asm_reader = AsmReader.new(inf)
-    # When we enter an #APP section (i.e. asm emitted from an expanded
-    # inline asm statement), create a new file tracker, in effect
-    # processing the .file and .loc directives in a new "namespace"
-    # (as far as the file numbers are concerned). This is an array,
-    # but in practice the size will either be 1 (NOAPP) or 2 (APP).
-    @asm_reader.app_to_noapp = Proc.new { ||
-                                          @trackers.pop
-    }
-    @asm_reader.noapp_to_app = Proc.new { ||
-                                          @trackers.push(FileSlotTracker.new(@trackers[-1]))
-    }
-  end
-  def run
-    while true
-      l = @asm_reader.next_line
-      break unless l
-
-      md = @@file_re.match(l)
-      if md
-        file_directive(md)
-        next
-      end
-      md = @@loc_re.match(l)
-      if md
-        loc_directive(md)
-        next
-      end
-      @outf.write(l)
-      next
-    end
-  end
-  def loc_directive(md)
-    tracker = @trackers.last
-    slot = tracker.remap_slot(md[:slot].to_i)
-    @outf.puts("#{md[:white1]}.loc#{md[:white2]}#{slot}#{md[:rest]}")
-  end
-  def file_directive(md)
-    tracker = @trackers.last
-
-    pr = FileDirectiveArgScanner.new(md[:rest]).parse
-    if pr.respond_to?(:error)
-      $stderr.puts("Error parsing path argument to .file directive: #{pr.error}")
-      exit(2)
-    end
-
-    path = pr.str
-    tracker.register_path(path, md[:slot].to_i)
-
-    slot = tracker.slot_for_path(path)
-    @outf.puts("\t.file\t#{slot} #{md[:rest]}")
-  end
-end
-
-# First, make sure our tests still pass. This only takes a fraction of
-# our runtime and ensures the tests will get run by anyone trying out
-# changes to this file.
-selftest
-
-if ARGV.size != 2
-  $stderr.puts("Usage: #{$0} input output")
-  exit(2)
-end
-
-inpath, outpath = ARGV.collect { |n| Pathname.new(n) }
-
-if not inpath.file?
-  $stderr.puts("Not a regular file: `#{inpath}`")
-  exit(2)
-end
-
-if inpath.extname.upcase != ".S"
-  $stderr.puts("warning: file `#{inpath}` doesn't have a `.s` or `.S` extension. Going on anyway...")
-end
-
-File.open(inpath, "r") { |inf|
-  File.open(outpath, "w") { |outf|
-    FileConflictResolver.new(inf, outf).run
-  }
-}
diff --git a/Source/JavaScriptCore/Sources.txt b/Source/JavaScriptCore/Sources.txt
index e6deb01..c7b638b 100644
--- a/Source/JavaScriptCore/Sources.txt
+++ b/Source/JavaScriptCore/Sources.txt
@@ -675,6 +675,8 @@
 llint/LLIntExceptions.cpp
 llint/LLIntSlowPaths.cpp
 llint/LLIntThunks.cpp
+// FIXME: We can't bundle this file due to a clang bug.
+llint/LowLevelInterpreter.cpp @no-unify
 
 parser/Lexer.cpp
 parser/ModuleAnalyzer.cpp
diff --git a/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp b/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
index c9aafc1..f8afc7a 100644
--- a/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
+++ b/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
@@ -537,19 +537,8 @@
 #define OFFLINE_ASM_OPCODE_DEBUG_LABEL(label)
 #endif
 
-// This works around a bug in GDB where, if the compilation unit
-// doesn't have any address range information, its line table won't
-// even be consulted. Emit {before,after}_llint_asm so that the code
-// emitted in the top level inline asm statement is within functions
-// visible to the compiler. This way, GDB can resolve a PC in the
-// llint asm code to this compilation unit and the successfully look
-// up the line number information.
-DEBUGGER_ANNOTATION_MARKER(before_llint_asm)
-
 // This is a file generated by offlineasm, which contains all of the assembly code
 // for the interpreter, as compiled from LowLevelInterpreter.asm.
 #include "LLIntAssembly.h"
 
-DEBUGGER_ANNOTATION_MARKER(after_llint_asm)
-
 #endif // ENABLE(C_LOOP)
diff --git a/Source/JavaScriptCore/offlineasm/config.rb b/Source/JavaScriptCore/offlineasm/config.rb
index 2f3123e..49543fc 100644
--- a/Source/JavaScriptCore/offlineasm/config.rb
+++ b/Source/JavaScriptCore/offlineasm/config.rb
@@ -89,10 +89,6 @@
                 end
             end
         end
-    elsif ENV["CMAKE_CXX_COMPILER_ID"] == 'GNU' and
-         ENV["GCC_OFFLINEASM_SOURCE_MAP"] == 'ON'
-      # All GCC versions that can build JSC support debug annotations
-      return true
     end
 
     false
diff --git a/Source/WTF/ChangeLog b/Source/WTF/ChangeLog
index 04b152b..44bbf16 100644
--- a/Source/WTF/ChangeLog
+++ b/Source/WTF/ChangeLog
@@ -1,3 +1,16 @@
+2020-04-02  Commit Queue  <commit-queue@webkit.org>
+
+        Unreviewed, reverting r259390.
+        https://bugs.webkit.org/show_bug.cgi?id=209944
+
+        It broke WinCairo builds (Requested by fujihiro on #webkit).
+
+        Reverted changeset:
+
+        "Enable offlineasm debug annotations for GCC"
+        https://bugs.webkit.org/show_bug.cgi?id=207119
+        https://trac.webkit.org/changeset/259390
+
 2020-04-02  Chris Dumez  <cdumez@apple.com>
 
         [iOS] Replace UIKit background task with a RunningBoard FinishTaskInterruptable assertion
diff --git a/Source/WTF/wtf/Compiler.h b/Source/WTF/wtf/Compiler.h
index 0fb3320..4374cb3 100644
--- a/Source/WTF/wtf/Compiler.h
+++ b/Source/WTF/wtf/Compiler.h
@@ -382,17 +382,6 @@
 #define WARN_UNUSED_RETURN
 #endif
 
-/* DEBUGGER_ANNOTATION_MARKER */
-
-#if !defined(DEBUGGER_ANNOTATION_MARKER) && COMPILER(GCC)
-#define DEBUGGER_ANNOTATION_MARKER(name) \
-    __attribute__((__no_reorder__)) void name(void) { __asm__(""); }
-#endif
-
-#if !defined(DEBUGGER_ANNOTATION_MARKER)
-#define DEBUGGER_ANNOTATION_MARKER(name)
-#endif
-
 #if !defined(__has_include) && COMPILER(MSVC)
 #define __has_include(path) 0
 #endif
diff --git a/Source/cmake/OptionsCommon.cmake b/Source/cmake/OptionsCommon.cmake
index ea13624..a574ef8 100644
--- a/Source/cmake/OptionsCommon.cmake
+++ b/Source/cmake/OptionsCommon.cmake
@@ -112,15 +112,6 @@
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gdb-index")
 endif ()
 
-set(GCC_OFFLINEASM_SOURCE_MAP_DEFAULT OFF)
-if (CMAKE_BUILD_TYPE STREQUAL "Debug" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
-    set(GCC_OFFLINEASM_SOURCE_MAP_DEFAULT ON)
-endif ()
-
-option(GCC_OFFLINEASM_SOURCE_MAP
-  "Produce debug line information for offlineasm-generated code"
-  ${GCC_OFFLINEASM_SOURCE_MAP_DEFAULT})
-
 # Enable the usage of OpenMP.
 #  - At this moment, OpenMP is only used as an alternative implementation
 #    to native threads for the parallelization of the SVG filters.