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124 lines
4.4 KiB
Python
124 lines
4.4 KiB
Python
# Copyright 2020 MongoDB Inc.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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import os
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import SCons
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_splitDwarfFlag = "-gsplit-dwarf"
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# Cribbed from Tool/cc.py and Tool/c++.py. It would be better if
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# we could obtain this from SCons.
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_CSuffixes = [".c"]
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if not SCons.Util.case_sensitive_suffixes(".c", ".C"):
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_CSuffixes.append(".C")
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_CXXSuffixes = [".cpp", ".cc", ".cxx", ".c++", ".C++"]
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if SCons.Util.case_sensitive_suffixes(".c", ".C"):
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_CXXSuffixes.append(".C")
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def _dwo_emitter(target, source, env):
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new_targets = []
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for t in target:
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base, ext = SCons.Util.splitext(str(t))
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if not any(ext == env[osuffix] for osuffix in ["OBJSUFFIX", "SHOBJSUFFIX"]):
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continue
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dwotarget = (t.builder.target_factory or env.File)(base + env["DWOSUFFIX"])
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new_targets.append(dwotarget)
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targets = target + new_targets
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return (targets, source)
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def _dwp_emitter(target, source, env):
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if "conftest" not in str(target[0]) and env.get("SPLIT_DWARF_DWP_FILES"):
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# Check if the information regarding where the dwo files is located are stored in
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# the binary or a separate debug file.
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if len(target) > 1 and os.path.splitext(str(target[1]))[1] == env.get("SEPDBG_SUFFIX"):
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target_file = target[1]
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else:
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target_file = target[0]
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dwp_file = env.DWP(
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target=env.File(os.path.splitext(target_file.name)[0] + env["DWPSUFFIX"]),
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source=target_file,
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)
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env.NoCache(dwp_file)
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if hasattr(env, "AutoInstall") and env.get("AIB_COMPONENT"):
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env.AutoInstall(
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"$PREFIX_BINDIR",
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dwp_file,
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AIB_COMPONENT=env.get("AIB_COMPONENT"),
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AIB_ROLE="debug",
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AIB_EXTRA_COMPONENTS=env.get("AIB_EXTRA_COMPONENTS", []),
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)
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return target, source
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def options(opts):
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opts.AddVariables(
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("DWP", "Path to dwp binary."),
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("SPLIT_DWARF_DWP_FILES", "Set to enable DWP file creation from split dwarf."),
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)
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def generate(env):
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# these suffixes are not adjustable to the underlying tools (gcc)
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# but we leave them adjustable in scons in case this changes in certain circumstances
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env["DWOSUFFIX"] = env.get("DWOSUFFIX", ".dwo")
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env["DWPSUFFIX"] = env.get("DWPSUFFIX", ".dwp")
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env.Append(CCFLAGS=[_splitDwarfFlag])
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for object_builder in SCons.Tool.createObjBuilders(env):
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emitterdict = object_builder.builder.emitter
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for suffix in emitterdict.keys():
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if suffix not in _CSuffixes + _CXXSuffixes:
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continue
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base = emitterdict[suffix]
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emitterdict[suffix] = SCons.Builder.ListEmitter(
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[
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base,
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_dwo_emitter,
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]
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)
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for builder in ["Program"]:
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builder = env["BUILDERS"][builder]
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base_emitter = builder.emitter
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new_emitter = SCons.Builder.ListEmitter([base_emitter, _dwp_emitter])
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builder.emitter = new_emitter
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env["DWP"] = env.get("DWP", "dwp")
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env["BUILDERS"]["DWP"] = SCons.Builder.Builder(
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action=SCons.Action.Action(
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"$DWP -e $SOURCE -o $TARGET",
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"Building dwp file from $SOURCE" if not env.Verbose() else "",
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)
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)
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def exists(env):
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return any(_splitDwarfFlag in env[f] for f in ["CCFLAGS", "CFLAGS", "CXXFLAGS"])
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