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Object: support empty UID/GID fields

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Normal archives do not have empty UID/GID fields.  However, the Microsoft
Import library format is a customized archive (it just uses an alternate symbol
index format).  When the import library is constructed by lib.exe, the UID and
GID fields are left empty.  Do not abort on such an input.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274528 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool 2016-07-05 00:23:05 +00:00
parent 25cd212829
commit e88f1b3430
3 changed files with 13 additions and 2 deletions
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10
lib/Object/Archive.cpp
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@ -69,14 +69,20 @@ sys::TimeValue ArchiveMemberHeader::getLastModified() const {
unsigned ArchiveMemberHeader::getUID() const {
unsigned Ret;
if (StringRef(UID, sizeof(UID)).rtrim(' ').getAsInteger(10, Ret))
StringRef User = StringRef(UID, sizeof(UID)).rtrim(' ');
if (User.empty())
return 0;
if (User.getAsInteger(10, Ret))
llvm_unreachable("UID time not a decimal number.");
return Ret;
}
unsigned ArchiveMemberHeader::getGID() const {
unsigned Ret;
if (StringRef(GID, sizeof(GID)).rtrim(' ').getAsInteger(10, Ret))
StringRef Group = StringRef(GID, sizeof(GID)).rtrim(' ');
if (Group.empty())
return 0;
if (Group.getAsInteger(10, Ret))
llvm_unreachable("GID time not a decimal number.");
return Ret;
}

2
test/tools/llvm-ar/Inputs/msvc-import.lib Normal file
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@ -0,0 +1,2 @@
!<arch>
library.dll/ 28800 0 0 `

3
test/tools/llvm-ar/empty-uid-gid.test Normal file
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@ -0,0 +1,3 @@
RUN: llvm-ar tv %S/Inputs/msvc-import.lib | FileCheck %s
CHECK: --------- 0/0 0 1970-01-01 00:00:00.000000000 library.dll