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# Copyright (c) 2013 Google Inc. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Utility functions shared amongst the Windows generators."""
import copy
import os
# A dictionary mapping supported target types to extensions.
TARGET_TYPE_EXT = {
'executable': 'exe',
'loadable_module': 'dll',
'shared_library': 'dll',
'static_library': 'lib',
}
def _GetLargePdbShimCcPath():
"""Returns the path of the large_pdb_shim.cc file."""
this_dir = os.path.abspath(os.path.dirname(__file__))
src_dir = os.path.abspath(os.path.join(this_dir, '..', '..'))
win_data_dir = os.path.join(src_dir, 'data', 'win')
large_pdb_shim_cc = os.path.join(win_data_dir, 'large-pdb-shim.cc')
return large_pdb_shim_cc
def _DeepCopySomeKeys(in_dict, keys):
"""Performs a partial deep-copy on |in_dict|, only copying the keys in |keys|.
Arguments:
in_dict: The dictionary to copy.
keys: The keys to be copied. If a key is in this list and doesn't exist in
|in_dict| this is not an error.
Returns:
The partially deep-copied dictionary.
"""
d = {}
for key in keys:
if key not in in_dict:
continue
d[key] = copy.deepcopy(in_dict[key])
return d
def _SuffixName(name, suffix):
"""Add a suffix to the end of a target.
Arguments:
name: name of the target (foo#target)
suffix: the suffix to be added
Returns:
Target name with suffix added (foo_suffix#target)
"""
parts = name.rsplit('#', 1)
parts[0] = '%s_%s' % (parts[0], suffix)
return '#'.join(parts)
def _ShardName(name, number):
"""Add a shard number to the end of a target.
Arguments:
name: name of the target (foo#target)
number: shard number
Returns:
Target name with shard added (foo_1#target)
"""
return _SuffixName(name, str(number))
def ShardTargets(target_list, target_dicts):
"""Shard some targets apart to work around the linkers limits.
Arguments:
target_list: List of target pairs: 'base/base.gyp:base'.
target_dicts: Dict of target properties keyed on target pair.
Returns:
Tuple of the new sharded versions of the inputs.
"""
# Gather the targets to shard, and how many pieces.
targets_to_shard = {}
for t in target_dicts:
shards = int(target_dicts[t].get('msvs_shard', 0))
if shards:
targets_to_shard[t] = shards
# Shard target_list.
new_target_list = []
for t in target_list:
if t in targets_to_shard:
for i in range(targets_to_shard[t]):
new_target_list.append(_ShardName(t, i))
else:
new_target_list.append(t)
# Shard target_dict.
new_target_dicts = {}
for t in target_dicts:
if t in targets_to_shard:
for i in range(targets_to_shard[t]):
name = _ShardName(t, i)
new_target_dicts[name] = copy.copy(target_dicts[t])
new_target_dicts[name]['target_name'] = _ShardName(
new_target_dicts[name]['target_name'], i)
sources = new_target_dicts[name].get('sources', [])
new_sources = []
for pos in range(i, len(sources), targets_to_shard[t]):
new_sources.append(sources[pos])
new_target_dicts[name]['sources'] = new_sources
else:
new_target_dicts[t] = target_dicts[t]
# Shard dependencies.
for t in new_target_dicts:
for deptype in ('dependencies', 'dependencies_original'):
dependencies = copy.copy(new_target_dicts[t].get(deptype, []))
new_dependencies = []
for d in dependencies:
if d in targets_to_shard:
for i in range(targets_to_shard[d]):
new_dependencies.append(_ShardName(d, i))
else:
new_dependencies.append(d)
new_target_dicts[t][deptype] = new_dependencies
return (new_target_list, new_target_dicts)
def _GetPdbPath(target_dict, config_name, vars):
"""Returns the path to the PDB file that will be generated by a given
configuration.
The lookup proceeds as follows:
- Look for an explicit path in the VCLinkerTool configuration block.
- Look for an 'msvs_large_pdb_path' variable.
- Use '<(PRODUCT_DIR)/<(product_name).(exe|dll).pdb' if 'product_name' is
specified.
- Use '<(PRODUCT_DIR)/<(target_name).(exe|dll).pdb'.
Arguments:
target_dict: The target dictionary to be searched.
config_name: The name of the configuration of interest.
vars: A dictionary of common GYP variables with generator-specific values.
Returns:
The path of the corresponding PDB file.
"""
config = target_dict['configurations'][config_name]
msvs = config.setdefault('msvs_settings', {})
linker = msvs.get('VCLinkerTool', {})
pdb_path = linker.get('ProgramDatabaseFile')
if pdb_path:
return pdb_path
variables = target_dict.get('variables', {})
pdb_path = variables.get('msvs_large_pdb_path', None)
if pdb_path:
return pdb_path
pdb_base = target_dict.get('product_name', target_dict['target_name'])
pdb_base = '%s.%s.pdb' % (pdb_base, TARGET_TYPE_EXT[target_dict['type']])
pdb_path = vars['PRODUCT_DIR'] + '/' + pdb_base
return pdb_path
def InsertLargePdbShims(target_list, target_dicts, vars):
"""Insert a shim target that forces the linker to use 4KB pagesize PDBs.
This is a workaround for targets with PDBs greater than 1GB in size, the
limit for the 1KB pagesize PDBs created by the linker by default.
Arguments:
target_list: List of target pairs: 'base/base.gyp:base'.
target_dicts: Dict of target properties keyed on target pair.
vars: A dictionary of common GYP variables with generator-specific values.
Returns:
Tuple of the shimmed version of the inputs.
"""
# Determine which targets need shimming.
targets_to_shim = []
for t in target_dicts:
target_dict = target_dicts[t]
# We only want to shim targets that have msvs_large_pdb enabled.
if not int(target_dict.get('msvs_large_pdb', 0)):
continue
# This is intended for executable, shared_library and loadable_module
# targets where every configuration is set up to produce a PDB output.
# If any of these conditions is not true then the shim logic will fail
# below.
targets_to_shim.append(t)
large_pdb_shim_cc = _GetLargePdbShimCcPath()
for t in targets_to_shim:
target_dict = target_dicts[t]
target_name = target_dict.get('target_name')
base_dict = _DeepCopySomeKeys(target_dict,
['configurations', 'default_configuration', 'toolset'])
# This is the dict for copying the source file (part of the GYP tree)
# to the intermediate directory of the project. This is necessary because
# we can't always build a relative path to the shim source file (on Windows
# GYP and the project may be on different drives), and Ninja hates absolute
# paths (it ends up generating the .obj and .obj.d alongside the source
# file, polluting GYPs tree).
copy_suffix = 'large_pdb_copy'
copy_target_name = target_name + '_' + copy_suffix
full_copy_target_name = _SuffixName(t, copy_suffix)
shim_cc_basename = os.path.basename(large_pdb_shim_cc)
shim_cc_dir = vars['SHARED_INTERMEDIATE_DIR'] + '/' + copy_target_name
shim_cc_path = shim_cc_dir + '/' + shim_cc_basename
copy_dict = copy.deepcopy(base_dict)
copy_dict['target_name'] = copy_target_name
copy_dict['type'] = 'none'
copy_dict['sources'] = [ large_pdb_shim_cc ]
copy_dict['copies'] = [{
'destination': shim_cc_dir,
'files': [ large_pdb_shim_cc ]
}]
# This is the dict for the PDB generating shim target. It depends on the
# copy target.
shim_suffix = 'large_pdb_shim'
shim_target_name = target_name + '_' + shim_suffix
full_shim_target_name = _SuffixName(t, shim_suffix)
shim_dict = copy.deepcopy(base_dict)
shim_dict['target_name'] = shim_target_name
shim_dict['type'] = 'static_library'
shim_dict['sources'] = [ shim_cc_path ]
shim_dict['dependencies'] = [ full_copy_target_name ]
# Set up the shim to output its PDB to the same location as the final linker
# target.
for config_name, config in shim_dict.get('configurations').items():
pdb_path = _GetPdbPath(target_dict, config_name, vars)
# A few keys that we don't want to propagate.
for key in ['msvs_precompiled_header', 'msvs_precompiled_source', 'test']:
config.pop(key, None)
msvs = config.setdefault('msvs_settings', {})
# Update the compiler directives in the shim target.
compiler = msvs.setdefault('VCCLCompilerTool', {})
compiler['DebugInformationFormat'] = '3'
compiler['ProgramDataBaseFileName'] = pdb_path
# Set the explicit PDB path in the appropriate configuration of the
# original target.
config = target_dict['configurations'][config_name]
msvs = config.setdefault('msvs_settings', {})
linker = msvs.setdefault('VCLinkerTool', {})
linker['GenerateDebugInformation'] = 'true'
linker['ProgramDatabaseFile'] = pdb_path
# Add the new targets. They must go to the beginning of the list so that
# the dependency generation works as expected in ninja.
target_list.insert(0, full_copy_target_name)
target_list.insert(0, full_shim_target_name)
target_dicts[full_copy_target_name] = copy_dict
target_dicts[full_shim_target_name] = shim_dict
# Update the original target to depend on the shim target.
target_dict.setdefault('dependencies', []).append(full_shim_target_name)
return (target_list, target_dicts)
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