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Revert "Revert "Implement xfer:libraries-svr4:read packet""

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This reverts commit 08c38f77c5.

llvm-svn: 366847
This commit is contained in:
Antonio Afonso
2019-07-23 20:40:30 +00:00
parent cbbdc41838
commit 05e32bad13
16 changed files with 366 additions and 5 deletions
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71
lldb/source/Plugins/Process/POSIX/NativeProcessELF.cpp
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@@ -107,4 +107,73 @@ lldb::addr_t NativeProcessELF::GetELFImageInfoAddress() {
return LLDB_INVALID_ADDRESS;
}
} // namespace lldb_private
template <typename T>
llvm::Expected<SVR4LibraryInfo>
NativeProcessELF::ReadSVR4LibraryInfo(lldb::addr_t link_map_addr) {
ELFLinkMap<T> link_map;
size_t bytes_read;
auto error =
ReadMemory(link_map_addr, &link_map, sizeof(link_map), bytes_read);
if (!error.Success())
return error.ToError();
char name_buffer[PATH_MAX];
error = ReadMemory(link_map.l_name, &name_buffer, sizeof(name_buffer),
bytes_read);
if (bytes_read == 0)
return error.ToError();
name_buffer[PATH_MAX - 1] = '\0';
SVR4LibraryInfo info;
info.name = std::string(name_buffer);
info.link_map = link_map_addr;
info.base_addr = link_map.l_addr;
info.ld_addr = link_map.l_ld;
info.next = link_map.l_next;
return info;
}
llvm::Expected<std::vector<SVR4LibraryInfo>>
NativeProcessELF::GetLoadedSVR4Libraries() {
// Address of DT_DEBUG.d_ptr which points to r_debug
lldb::addr_t info_address = GetSharedLibraryInfoAddress();
if (info_address == LLDB_INVALID_ADDRESS)
return llvm::createStringError(llvm::inconvertibleErrorCode(),
"Invalid shared library info address");
// Address of r_debug
lldb::addr_t address = 0;
size_t bytes_read;
auto status =
ReadMemory(info_address, &address, GetAddressByteSize(), bytes_read);
if (!status.Success())
return status.ToError();
if (address == 0)
return llvm::createStringError(llvm::inconvertibleErrorCode(),
"Invalid r_debug address");
// Read r_debug.r_map
lldb::addr_t link_map = 0;
status = ReadMemory(address + GetAddressByteSize(), &link_map,
GetAddressByteSize(), bytes_read);
if (!status.Success())
return status.ToError();
if (address == 0)
return llvm::createStringError(llvm::inconvertibleErrorCode(),
"Invalid link_map address");
std::vector<SVR4LibraryInfo> library_list;
while (link_map) {
llvm::Expected<SVR4LibraryInfo> info =
GetAddressByteSize() == 8 ? ReadSVR4LibraryInfo<uint64_t>(link_map)
: ReadSVR4LibraryInfo<uint32_t>(link_map);
if (!info)
return info.takeError();
if (!info->name.empty() && info->base_addr != 0)
library_list.push_back(*info);
link_map = info->next;
}
return library_list;
}
} // namespace lldb_private