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MSVSUtil.py
# 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", "windows_driver": "sys", } 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] = f"{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 sorted(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 = "{}.{}.pdb".format(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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