Revert r219354. It seems to break some buildbots.

llvm-svn: 219355

cmake/config-ix.cmake

@@ -50,7 +50,6 @@ check_include_file(execinfo.h HAVE_EXECINFO_H)
 check_include_file(fcntl.h HAVE_FCNTL_H)
 check_include_file(inttypes.h HAVE_INTTYPES_H)
 check_include_file(limits.h HAVE_LIMITS_H)
-check_include_file(link.h HAVE_LINK_H)
 check_include_file(malloc.h HAVE_MALLOC_H)
 check_include_file(malloc/malloc.h HAVE_MALLOC_MALLOC_H)
 check_include_file(ndir.h HAVE_NDIR_H)

include/llvm/Config/config.h.cmake

@@ -188,9 +188,6 @@
 /* Define to 1 if you have the <limits.h> header file. */
 #cmakedefine HAVE_LIMITS_H ${HAVE_LIMITS_H}
 
-/* Define to 1 if you have the <link.h> header file. */
-#cmakedefine HAVE_LINK_H ${HAVE_LINK_H}
-
 /* Define if you can use -rdynamic. */
 #define HAVE_LINK_EXPORT_DYNAMIC 1
 

lib/Support/Unix/Signals.inc

@@ -14,14 +14,9 @@
 
 #include "Unix.h"
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/FileUtilities.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Mutex.h"
-#include "llvm/Support/Program.h"
 #include "llvm/Support/UniqueLock.h"
-#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/ManagedStatic.h"
 #include <algorithm>
 #include <string>
 #include <vector>
@@ -43,9 +38,6 @@
 #if HAVE_MACH_MACH_H
 #include <mach/mach.h>
 #endif
-#if HAVE_LINK_H
-#include <link.h>
-#endif
 
 using namespace llvm;
 
@@ -272,134 +264,6 @@ void llvm::sys::AddSignalHandler(void (*FnPtr)(void *), void *Cookie) {
   RegisterHandlers();
 }
 
-#if HAVE_LINK_H
-struct DlIteratePhdrData {
-  void **StackTrace;
-  int depth;
-  bool first;
-  const char **modules;
-  intptr_t *offsets;
-  const char *main_exec_name;
-};
-
-static int dl_iterate_phdr_cb(dl_phdr_info *info, size_t size, void *arg) {
-  DlIteratePhdrData *data = (DlIteratePhdrData*)arg;
-  const char *name = data->first ? data->main_exec_name : info->dlpi_name;
-  data->first = false;
-  for (int i = 0; i < info->dlpi_phnum; i++) {
-    const ElfW(Phdr) *phdr = &info->dlpi_phdr[i];
-    if (phdr->p_type != PT_LOAD)
-      continue;
-    intptr_t beg = info->dlpi_addr + phdr->p_vaddr;
-    intptr_t end = beg + phdr->p_memsz;
-    for (int j = 0; j < data->depth; j++) {
-      if (data->modules[j])
-        continue;
-      intptr_t addr = (intptr_t)data->StackTrace[j];
-      if (beg <= addr && addr < end) {
-        data->modules[j] = name;
-        data->offsets[j] = addr - info->dlpi_addr;
-      }
-    }
-  }
-  return 0;
-}
-
-static bool findModulesAndOffsets(void **StackTrace, int Depth,
-                                  const char **Modules, intptr_t *Offsets,
-                                  const char *MainExecutableName) {
-  DlIteratePhdrData data = {StackTrace, Depth,   true,
-                            Modules,    Offsets, MainExecutableName};
-  dl_iterate_phdr(dl_iterate_phdr_cb, &data);
-  return true;
-}
-#else
-static bool findModulesAndOffsets(void **StackTrace, int Depth,
-                                  const char **Modules, intptr_t *Offsets,
-                                  const char *MainExecutableName) {
-  return false;
-}
-#endif
-
-static bool printSymbolizedStackTrace(void **StackTrace, int Depth, FILE *FD) {
-  // FIXME: Subtract necessary number from StackTrace entries to turn return addresses
-  // into actual instruction addresses.
-  // Use llvm-symbolizer tool to symbolize the stack traces.
-  std::string LLVMSymbolizerPath = sys::FindProgramByName("llvm-symbolizer");
-  if (LLVMSymbolizerPath.empty())
-    return false;
-  // We don't know argv0 or the address of main() at this point, but try
-  // to guess it anyway (it's possible on some platforms).
-  std::string MainExecutableName = sys::fs::getMainExecutable(nullptr, nullptr);
-  if (MainExecutableName.empty() ||
-      MainExecutableName.find("llvm-symbolizer") != std::string::npos)
-    return false;
-
-  std::vector<const char *> Modules(Depth, nullptr);
-  std::vector<intptr_t> Offsets(Depth, 0);
-  if (!findModulesAndOffsets(StackTrace, Depth, Modules.data(), Offsets.data(),
-                             MainExecutableName.c_str()))
-    return false;
-  int InputFD;
-  SmallString<32> InputFile, OutputFile;
-  sys::fs::createTemporaryFile("symbolizer-input", "", InputFD, InputFile);
-  sys::fs::createTemporaryFile("symbolizer-output", "", OutputFile);
-  FileRemover InputRemover(InputFile.c_str());
-  FileRemover OutputRemover(OutputFile.c_str());
-  std::vector<const StringRef *> Redirects(3, nullptr);
-  StringRef InputFileStr(InputFile);
-  StringRef OutputFileStr(OutputFile);
-  StringRef StderrFileStr;
-  Redirects[0] = &InputFileStr;
-  Redirects[1] = &OutputFileStr;
-  Redirects[2] = &StderrFileStr;
-
-  {
-    raw_fd_ostream Input(InputFD, true);
-    for (int i = 0; i < Depth; i++) {
-      if (Modules[i])
-        Input << Modules[i] << " " << (void*)Offsets[i] << "\n";
-    }
-  }
-
-  const char *args[] = {"llvm-symbolizer", nullptr};
-  int RunResult =
-      sys::ExecuteAndWait(LLVMSymbolizerPath, args, nullptr, Redirects.data());
-  if (RunResult != 0)
-    return false;
-
-  auto OutputBuf = MemoryBuffer::getFile(OutputFile.c_str());
-  if (std::error_code Err = OutputBuf.getError())
-    return false;
-  StringRef Output = OutputBuf.get()->getBuffer();
-  SmallVector<StringRef, 32> Lines;
-  Output.split(Lines, "\n");
-  auto CurLine = Lines.begin();
-  int frame_no = 0;
-  for (int i = 0; i < Depth; i++) {
-    if (!Modules[i]) {
-      fprintf(FD, "#%d %p\n", frame_no++, StackTrace[i]);
-      continue;
-    }
-    // Read pairs of lines (function name and file/line info) until we
-    // encounter empty line.
-    for (;;) {
-      StringRef FunctionName = *CurLine++;
-      if (FunctionName.empty())
-        break;
-      fprintf(FD, "#%d %p ", frame_no++, StackTrace[i]);
-      if (!FunctionName.startswith("??"))
-        fprintf(FD, "%s ", FunctionName.str().c_str());
-      StringRef FileLineInfo = *CurLine++;
-      if (!FileLineInfo.startswith("??"))
-        fprintf(FD, "%s", FileLineInfo.str().c_str());
-      else
-        fprintf(FD, "(%s+%p)", Modules[i], (void *)Offsets[i]);
-      fprintf(FD, "\n");
-    }
-  }
-  return true;
-}
 
 // PrintStackTrace - In the case of a program crash or fault, print out a stack
 // trace so that the user has an indication of why and where we died.
@@ -412,8 +276,6 @@ void llvm::sys::PrintStackTrace(FILE *FD) {
   // Use backtrace() to output a backtrace on Linux systems with glibc.
   int depth = backtrace(StackTrace,
                         static_cast<int>(array_lengthof(StackTrace)));
-  if (printSymbolizedStackTrace(StackTrace, depth, FD))
-    return;
 #if HAVE_DLFCN_H && __GNUG__
   int width = 0;
   for (int i = 0; i < depth; ++i) {