diff options
Diffstat (limited to 'lldb/source/Plugins/DynamicLoader/Linux-DYLD/AuxVector.cpp')
| -rw-r--r-- | lldb/source/Plugins/DynamicLoader/Linux-DYLD/AuxVector.cpp | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/lldb/source/Plugins/DynamicLoader/Linux-DYLD/AuxVector.cpp b/lldb/source/Plugins/DynamicLoader/Linux-DYLD/AuxVector.cpp index 6954e4cac4d..e69de29bb2d 100644 --- a/lldb/source/Plugins/DynamicLoader/Linux-DYLD/AuxVector.cpp +++ b/lldb/source/Plugins/DynamicLoader/Linux-DYLD/AuxVector.cpp @@ -1,191 +0,0 @@ -//===-- AuxVector.cpp -------------------------------------------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -// C Includes -#include <fcntl.h> -#include <sys/stat.h> -#include <sys/types.h> - -// C++ Includes -// Other libraries and framework includes -#include "lldb/Core/DataBufferHeap.h" -#include "lldb/Core/DataExtractor.h" -#include "lldb/Core/Log.h" -#include "lldb/Target/Process.h" - -#include "AuxVector.h" - -using namespace lldb; -using namespace lldb_private; - -static bool -GetMaxU64(DataExtractor &data, - uint32_t *offset, uint64_t *value, unsigned int byte_size) -{ - uint32_t saved_offset = *offset; - *value = data.GetMaxU64(offset, byte_size); - return *offset != saved_offset; -} - -static bool -ParseAuxvEntry(DataExtractor &data, AuxVector::Entry &entry, - uint32_t *offset, unsigned int byte_size) -{ - if (!GetMaxU64(data, offset, &entry.type, byte_size)) - return false; - - if (!GetMaxU64(data, offset, &entry.value, byte_size)) - return false; - - return true; -} - -DataBufferSP -AuxVector::GetAuxvData() -{ - static const size_t path_size = 128; - static char path[path_size]; - DataBufferSP buf_sp; - int fd; - - // Ideally, we would simply create a FileSpec and call ReadFileContents. - // However, files in procfs have zero size (since they are, in general, - // dynamically generated by the kernel) which is incompatible with the - // current ReadFileContents implementation. Therefore we simply stream the - // data into a DataBuffer ourselves. - if (snprintf(path, path_size, "/proc/%d/auxv", m_process->GetID()) < 0) - return buf_sp; - - if ((fd = open(path, O_RDONLY, 0)) < 0) - return buf_sp; - - size_t bytes_read = 0; - std::auto_ptr<DataBufferHeap> buf_ap(new DataBufferHeap(1024, 0)); - for (;;) - { - size_t avail = buf_ap->GetByteSize() - bytes_read; - ssize_t status = read(fd, buf_ap->GetBytes() + bytes_read, avail); - - if (status < 0) - break; - - bytes_read += status; - - if (status == 0) - { - buf_ap->SetByteSize(bytes_read); - buf_sp.reset(buf_ap.release()); - break; - } - - if (avail - status == 0) - buf_ap->SetByteSize(2 * buf_ap->GetByteSize()); - } - - return buf_sp; -} - -void -AuxVector::ParseAuxv(DataExtractor &data) -{ - const unsigned int byte_size = m_process->GetAddressByteSize(); - uint32_t offset = 0; - - for (;;) - { - Entry entry; - - if (!ParseAuxvEntry(data, entry, &offset, byte_size)) - break; - - if (entry.type == AT_NULL) - break; - - if (entry.type == AT_IGNORE) - continue; - - m_auxv.push_back(entry); - } -} - -AuxVector::AuxVector(Process *process) - : m_process(process) -{ - DataExtractor data; - LogSP log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); - - data.SetData(GetAuxvData()); - data.SetByteOrder(m_process->GetByteOrder()); - data.SetAddressByteSize(m_process->GetAddressByteSize()); - - ParseAuxv(data); - - if (log) - DumpToLog(log); -} - -AuxVector::iterator -AuxVector::FindEntry(EntryType type) const -{ - for (iterator I = begin(); I != end(); ++I) - { - if (I->type == static_cast<uint64_t>(type)) - return I; - } - - return end(); -} - -void -AuxVector::DumpToLog(LogSP log) const -{ - if (!log) - return; - - log->PutCString("AuxVector: "); - for (iterator I = begin(); I != end(); ++I) - { - log->Printf(" %s [%d]: %lx", GetEntryName(*I), I->type, I->value); - } -} - -const char * -AuxVector::GetEntryName(EntryType type) -{ - const char *name; - -#define ENTRY_NAME(_type) _type: name = #_type - switch (type) - { - default: - name = "unkown"; - break; - - case ENTRY_NAME(AT_NULL); break; - case ENTRY_NAME(AT_IGNORE); break; - case ENTRY_NAME(AT_EXECFD); break; - case ENTRY_NAME(AT_PHDR); break; - case ENTRY_NAME(AT_PHENT); break; - case ENTRY_NAME(AT_PHNUM); break; - case ENTRY_NAME(AT_PAGESZ); break; - case ENTRY_NAME(AT_BASE); break; - case ENTRY_NAME(AT_FLAGS); break; - case ENTRY_NAME(AT_ENTRY); break; - case ENTRY_NAME(AT_NOTELF); break; - case ENTRY_NAME(AT_UID); break; - case ENTRY_NAME(AT_EUID); break; - case ENTRY_NAME(AT_GID); break; - case ENTRY_NAME(AT_EGID); break; - case ENTRY_NAME(AT_CLKTCK); break; - } -#undef ENTRY_NAME - - return name; -} - |
