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[llvm-install-name-tool] Merge install-name options

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This diff merges all options for llvm-install-name-tool under a single
function processLoadCommands. Also adds another test case for -add_rpath
option.

Test plan: make check-all

Reviewed by: jhenderson, alexshap, smeenai, Ktwu

Differential Revision: https://reviews.llvm.org/D82812
This commit is contained in:
Sameer Arora 2020-07-06 14:53:24 -07:00
parent 2e394d9166
commit 9aaa6b386c
4 changed files with 124 additions and 116 deletions
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7
test/tools/llvm-objcopy/MachO/install-name-tool-add-rpath.test
View File

@ -22,6 +22,13 @@
# NO-INPUT: no input file specified
## Add same RPATH twice:
# RUN: not llvm-install-name-tool -add_rpath @executable_X \
# RUN: -add_rpath @executable_X %t.i386 2>&1 \
# RUN: | FileCheck --check-prefix=DOUBLE %s
# DOUBLE: duplicate load command
## Check that cmdsize accounts for NULL terminator.
# RUN: yaml2obj %p/Inputs/x86_64.yaml -o %t.x86_64
# RUN: llvm-install-name-tool -add_rpath abcd %t.x86_64

37
tools/llvm-objcopy/CopyConfig.cpp
View File

@ -874,42 +874,39 @@ parseInstallNameToolOptions(ArrayRef<const char *> ArgsArr) {
auto Match = [=](StringRef RPath) { return RPath == Old || RPath == New; };
// Cannot specify duplicate -rpath entries
auto It1 = find_if(Config.RPathsToUpdate,
[&Match](const std::pair<StringRef, StringRef> &OldNew) {
return Match(OldNew.first) || Match(OldNew.second);
});
auto It1 = find_if(
Config.RPathsToUpdate,
[&Match](const DenseMap<StringRef, StringRef>::value_type &OldNew) {
return Match(OldNew.getFirst()) || Match(OldNew.getSecond());
});
if (It1 != Config.RPathsToUpdate.end())
return createStringError(
errc::invalid_argument,
"cannot specify both -rpath %s %s and -rpath %s %s",
It1->first.str().c_str(), It1->second.str().c_str(),
Old.str().c_str(), New.str().c_str());
return createStringError(errc::invalid_argument,
"cannot specify both -rpath " + It1->getFirst() +
" " + It1->getSecond() + " and -rpath " +
Old + " " + New);
// Cannot specify the same rpath under both -delete_rpath and -rpath
auto It2 = find_if(Config.RPathsToRemove, Match);
if (It2 != Config.RPathsToRemove.end())
return createStringError(
errc::invalid_argument,
"cannot specify both -delete_rpath %s and -rpath %s %s",
It2->str().c_str(), Old.str().c_str(), New.str().c_str());
return createStringError(errc::invalid_argument,
"cannot specify both -delete_rpath " + *It2 +
" and -rpath " + Old + " " + New);
// Cannot specify the same rpath under both -add_rpath and -rpath
auto It3 = find_if(Config.RPathToAdd, Match);
if (It3 != Config.RPathToAdd.end())
return createStringError(
errc::invalid_argument,
"cannot specify both -add_rpath %s and -rpath %s %s",
It3->str().c_str(), Old.str().c_str(), New.str().c_str());
return createStringError(errc::invalid_argument,
"cannot specify both -add_rpath " + *It3 +
" and -rpath " + Old + " " + New);
Config.RPathsToUpdate.emplace_back(Old, New);
Config.RPathsToUpdate.insert({Old, New});
}
if (auto *Arg = InputArgs.getLastArg(INSTALL_NAME_TOOL_id))
Config.SharedLibId = Arg->getValue();
for (auto *Arg : InputArgs.filtered(INSTALL_NAME_TOOL_change)) {
Config.InstallNamesToUpdate.emplace_back(Arg->getValue(0),
Arg->getValue(1));
Config.InstallNamesToUpdate.insert({Arg->getValue(0), Arg->getValue(1)});
}
SmallVector<StringRef, 2> Positional;

4
tools/llvm-objcopy/CopyConfig.h
View File

@ -178,8 +178,8 @@ struct CopyConfig {
std::vector<StringRef> DumpSection;
std::vector<StringRef> SymbolsToAdd;
std::vector<StringRef> RPathToAdd;
std::vector<std::pair<StringRef, StringRef>> RPathsToUpdate;
std::vector<std::pair<StringRef, StringRef>> InstallNamesToUpdate;
DenseMap<StringRef, StringRef> RPathsToUpdate;
DenseMap<StringRef, StringRef> InstallNamesToUpdate;
DenseSet<StringRef> RPathsToRemove;
// install-name-tool's id option

192
tools/llvm-objcopy/MachO/MachOObjcopy.cpp
View File

@ -42,35 +42,6 @@ static StringRef getPayloadString(const LoadCommand &LC) {
.rtrim('\0');
}
static Error removeLoadCommands(const CopyConfig &Config, Object &Obj) {
DenseSet<StringRef> RPathsToRemove(Config.RPathsToRemove.begin(),
Config.RPathsToRemove.end());
LoadCommandPred RemovePred = [&RPathsToRemove](const LoadCommand &LC) {
if (LC.MachOLoadCommand.load_command_data.cmd == MachO::LC_RPATH) {
StringRef RPath = getPayloadString(LC);
if (RPathsToRemove.count(RPath)) {
RPathsToRemove.erase(RPath);
return true;
}
}
return false;
};
if (Error E = Obj.removeLoadCommands(RemovePred))
return E;
// Emit an error if the Mach-O binary does not contain an rpath path name
// specified in -delete_rpath.
for (StringRef RPath : Config.RPathsToRemove) {
if (RPathsToRemove.count(RPath))
return createStringError(errc::invalid_argument,
"no LC_RPATH load command with path: %s",
RPath.str().c_str());
}
return Error::success();
}
static Error removeSections(const CopyConfig &Config, Object &Obj) {
SectionPred RemovePred = [](const std::unique_ptr<Section> &) {
return false;
@ -157,6 +128,103 @@ static LoadCommand buildRPathLoadCommand(StringRef Path) {
return LC;
}
static Error processLoadCommands(const CopyConfig &Config, Object &Obj) {
// Remove RPaths.
DenseSet<StringRef> RPathsToRemove(Config.RPathsToRemove.begin(),
Config.RPathsToRemove.end());
LoadCommandPred RemovePred = [&RPathsToRemove](const LoadCommand &LC) {
if (LC.MachOLoadCommand.load_command_data.cmd == MachO::LC_RPATH) {
StringRef RPath = getPayloadString(LC);
if (RPathsToRemove.count(RPath)) {
RPathsToRemove.erase(RPath);
return true;
}
}
return false;
};
if (Error E = Obj.removeLoadCommands(RemovePred))
return E;
// Emit an error if the Mach-O binary does not contain an rpath path name
// specified in -delete_rpath.
for (StringRef RPath : Config.RPathsToRemove) {
if (RPathsToRemove.count(RPath))
return createStringError(errc::invalid_argument,
"no LC_RPATH load command with path: %s",
RPath.str().c_str());
}
DenseSet<StringRef> RPaths;
// Get all existing RPaths.
for (LoadCommand &LC : Obj.LoadCommands) {
if (LC.MachOLoadCommand.load_command_data.cmd == MachO::LC_RPATH)
RPaths.insert(getPayloadString(LC));
}
// Throw errors for invalid RPaths.
for (const auto &OldNew : Config.RPathsToUpdate) {
StringRef Old = OldNew.getFirst();
StringRef New = OldNew.getSecond();
if (RPaths.count(Old) == 0)
return createStringError(errc::invalid_argument,
"no LC_RPATH load command with path: " + Old);
if (RPaths.count(New) != 0)
return createStringError(errc::invalid_argument,
"rpath " + New +
" would create a duplicate load command");
}
// Update load commands.
for (LoadCommand &LC : Obj.LoadCommands) {
switch (LC.MachOLoadCommand.load_command_data.cmd) {
case MachO::LC_ID_DYLIB:
if (Config.SharedLibId) {
StringRef Id = Config.SharedLibId.getValue();
if (Id.empty())
return createStringError(errc::invalid_argument,
"cannot specify an empty id");
updateLoadCommandPayloadString<MachO::dylib_command>(LC, Id);
}
break;
case MachO::LC_RPATH: {
StringRef RPath = getPayloadString(LC);
StringRef NewRPath = Config.RPathsToUpdate.lookup(RPath);
if (!NewRPath.empty())
updateLoadCommandPayloadString<MachO::rpath_command>(LC, NewRPath);
break;
}
// TODO: Add LC_REEXPORT_DYLIB, LC_LAZY_LOAD_DYLIB, and LC_LOAD_UPWARD_DYLIB
// here once llvm-objcopy supports them.
case MachO::LC_LOAD_DYLIB:
case MachO::LC_LOAD_WEAK_DYLIB:
StringRef InstallName = getPayloadString(LC);
StringRef NewInstallName =
Config.InstallNamesToUpdate.lookup(InstallName);
if (!NewInstallName.empty())
updateLoadCommandPayloadString<MachO::dylib_command>(LC,
NewInstallName);
break;
}
}
// Add new RPaths.
for (StringRef RPath : Config.RPathToAdd) {
if (RPaths.count(RPath) != 0)
return createStringError(errc::invalid_argument,
"rpath " + RPath +
" would create a duplicate load command");
RPaths.insert(RPath);
Obj.addLoadCommand(buildRPathLoadCommand(RPath));
}
return Error::success();
}
static Error dumpSectionToFile(StringRef SecName, StringRef Filename,
Object &Obj) {
for (LoadCommand &LC : Obj.LoadCommands)
@ -273,34 +341,6 @@ static Error handleArgs(const CopyConfig &Config, Object &Obj) {
for (std::unique_ptr<Section> &Sec : LC.Sections)
Sec->Relocations.clear();
for (LoadCommand &LC : Obj.LoadCommands) {
switch (LC.MachOLoadCommand.load_command_data.cmd) {
case MachO::LC_ID_DYLIB:
if (Config.SharedLibId) {
StringRef Id = Config.SharedLibId.getValue();
if (Id.empty())
return createStringError(errc::invalid_argument,
"cannot specify an empty id");
updateLoadCommandPayloadString<MachO::dylib_command>(LC, Id);
}
break;
// TODO: Add LC_REEXPORT_DYLIB, LC_LAZY_LOAD_DYLIB, and LC_LOAD_UPWARD_DYLIB
// here once llvm-objcopy supports them.
case MachO::LC_LOAD_DYLIB:
case MachO::LC_LOAD_WEAK_DYLIB:
StringRef Old, New;
StringRef CurrentInstallName = getPayloadString(LC);
for (const auto &InstallNamePair : Config.InstallNamesToUpdate) {
std::tie(Old, New) = InstallNamePair;
if (CurrentInstallName == Old) {
updateLoadCommandPayloadString<MachO::dylib_command>(LC, New);
break;
}
}
}
}
for (const auto &Flag : Config.AddSection) {
std::pair<StringRef, StringRef> SecPair = Flag.split("=");
StringRef SecName = SecPair.first;
@ -311,45 +351,9 @@ static Error handleArgs(const CopyConfig &Config, Object &Obj) {
return E;
}
if (Error E = removeLoadCommands(Config, Obj))
if (Error E = processLoadCommands(Config, Obj))
return E;
StringRef Old, New;
for (const auto &OldNew : Config.RPathsToUpdate) {
std::tie(Old, New) = OldNew;
auto FindRPathLC = [&Obj](StringRef RPath) {
return find_if(Obj.LoadCommands, [=](const LoadCommand &LC) {
return LC.MachOLoadCommand.load_command_data.cmd == MachO::LC_RPATH &&
getPayloadString(LC) == RPath;
});
};
auto NewIt = FindRPathLC(New);
if (NewIt != Obj.LoadCommands.end())
return createStringError(errc::invalid_argument,
"rpath " + New +
" would create a duplicate load command");
auto OldIt = FindRPathLC(Old);
if (OldIt == Obj.LoadCommands.end())
return createStringError(errc::invalid_argument,
"no LC_RPATH load command with path: " + Old);
updateLoadCommandPayloadString<MachO::rpath_command>(*OldIt, New);
}
for (StringRef RPath : Config.RPathToAdd) {
for (LoadCommand &LC : Obj.LoadCommands) {
if (LC.MachOLoadCommand.load_command_data.cmd == MachO::LC_RPATH &&
RPath == getPayloadString(LC)) {
return createStringError(errc::invalid_argument,
"rpath " + RPath +
" would create a duplicate load command");
}
}
Obj.addLoadCommand(buildRPathLoadCommand(RPath));
}
return Error::success();
}