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[llvm-readobj] Support -needed-libs option for Mach-O files

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This implements the -needed-libs option in Mach-O dumper.

Differential Revision: https://reviews.llvm.org/D41527

llvm-svn: 321980
This commit is contained in:
Petr Hosek 2018-01-08 02:23:10 +00:00
parent 5116b57234
commit f3445571ec
2 changed files with 56 additions and 0 deletions
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26
test/tools/llvm-readobj/macho-needed-libs.test Normal file
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@ -0,0 +1,26 @@
# RUN: yaml2obj %s -o %t.o
# RUN: llvm-readobj -needed-libs %t.o | FileCheck %s
# CHECK: NeededLibraries [
# CHECK-NEXT: /usr/lib/libSystem.B.dylib
# CHECK-NEXT: ]
!mach-o
FileHeader:
magic: 0xFEEDFACF
cputype: 0x01000007
cpusubtype: 0x00000003
filetype: 0x00000001
ncmds: 1
sizeofcmds: 56
flags: 0x00002000
reserved: 0x00000000
LoadCommands:
- cmd: LC_LOAD_DYLIB
cmdsize: 56
dylib:
name: 24
timestamp: 2
current_version: 81985536
compatibility_version: 65536
PayloadString: /usr/lib/libSystem.B.dylib

30
tools/llvm-readobj/MachODumper.cpp
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@ -39,6 +39,8 @@ public:
void printUnwindInfo() override;
void printStackMap() const override;
void printNeededLibraries() override;
// MachO-specific.
void printMachODataInCode() override;
void printMachOVersionMin() override;
@ -675,6 +677,34 @@ void MachODumper::printStackMap() const {
StackMapV2Parser<support::big>(StackMapContentsArray));
}
void MachODumper::printNeededLibraries() {
ListScope D(W, "NeededLibraries");
using LibsTy = std::vector<StringRef>;
LibsTy Libs;
for (const auto &Command : Obj->load_commands()) {
if (Command.C.cmd == MachO::LC_LOAD_DYLIB ||
Command.C.cmd == MachO::LC_ID_DYLIB ||
Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
Command.C.cmd == MachO::LC_REEXPORT_DYLIB ||
Command.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
Command.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
MachO::dylib_command Dl = Obj->getDylibIDLoadCommand(Command);
if (Dl.dylib.name < Dl.cmdsize) {
auto *P = static_cast<const char*>(Command.Ptr) + Dl.dylib.name;
Libs.push_back(P);
}
}
}
std::stable_sort(Libs.begin(), Libs.end());
for (const auto &L : Libs) {
outs() << " " << L << "\n";
}
}
void MachODumper::printMachODataInCode() {
for (const auto &Load : Obj->load_commands()) {
if (Load.C.cmd == MachO::LC_DATA_IN_CODE) {