Merge pull request #2892 from ziglang/install-with-zig-build

move some of the installation from cmake to zig build

1 files changed, 410 insertions, 0 deletions

diff --git a/lib/libunwind/src/libunwind.cpp b/lib/libunwind/src/libunwind.cpp
new file mode 100644
index 0000000000..f4d71a1863
--- /dev/null
+++ b/lib/libunwind/src/libunwind.cpp
@@ -0,0 +1,410 @@
+//===--------------------------- libunwind.cpp ----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//
+//  Implements unw_* functions from <libunwind.h>
+//
+//===----------------------------------------------------------------------===//
+
+#include <libunwind.h>
+
+#ifndef NDEBUG
+#include <cstdlib> // getenv
+#endif
+#include <new>
+#include <algorithm>
+
+#include "libunwind_ext.h"
+#include "config.h"
+
+#include <stdlib.h>
+
+
+#if !defined(__USING_SJLJ_EXCEPTIONS__)
+#include "AddressSpace.hpp"
+#include "UnwindCursor.hpp"
+
+using namespace libunwind;
+
+/// internal object to represent this processes address space
+LocalAddressSpace LocalAddressSpace::sThisAddressSpace;
+
+_LIBUNWIND_EXPORT unw_addr_space_t unw_local_addr_space =
+    (unw_addr_space_t)&LocalAddressSpace::sThisAddressSpace;
+
+/// record the registers and stack position of the caller
+extern int unw_getcontext(unw_context_t *);
+// note: unw_getcontext() implemented in assembly
+
+/// Create a cursor of a thread in this process given 'context' recorded by
+/// unw_getcontext().
+_LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor,
+                                     unw_context_t *context) {
+  _LIBUNWIND_TRACE_API("unw_init_local(cursor=%p, context=%p)",
+                       static_cast<void *>(cursor),
+                       static_cast<void *>(context));
+#if defined(__i386__)
+# define REGISTER_KIND Registers_x86
+#elif defined(__x86_64__)
+# define REGISTER_KIND Registers_x86_64
+#elif defined(__powerpc64__)
+# define REGISTER_KIND Registers_ppc64
+#elif defined(__ppc__)
+# define REGISTER_KIND Registers_ppc
+#elif defined(__aarch64__)
+# define REGISTER_KIND Registers_arm64
+#elif defined(__arm__)
+# define REGISTER_KIND Registers_arm
+#elif defined(__or1k__)
+# define REGISTER_KIND Registers_or1k
+#elif defined(__mips__) && defined(_ABIO32) && _MIPS_SIM == _ABIO32
+# define REGISTER_KIND Registers_mips_o32
+#elif defined(__mips64)
+# define REGISTER_KIND Registers_mips_newabi
+#elif defined(__mips__)
+# warning The MIPS architecture is not supported with this ABI and environment!
+#elif defined(__sparc__)
+# define REGISTER_KIND Registers_sparc
+#else
+# error Architecture not supported
+#endif
+  // Use "placement new" to allocate UnwindCursor in the cursor buffer.
+  new ((void *)cursor) UnwindCursor<LocalAddressSpace, REGISTER_KIND>(
+                                 context, LocalAddressSpace::sThisAddressSpace);
+#undef REGISTER_KIND
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  co->setInfoBasedOnIPRegister();
+
+  return UNW_ESUCCESS;
+}
+
+#ifdef UNW_REMOTE
+/// Create a cursor into a thread in another process.
+_LIBUNWIND_EXPORT int unw_init_remote_thread(unw_cursor_t *cursor,
+                                             unw_addr_space_t as,
+                                             void *arg) {
+  // special case: unw_init_remote(xx, unw_local_addr_space, xx)
+  if (as == (unw_addr_space_t)&LocalAddressSpace::sThisAddressSpace)
+    return unw_init_local(cursor, NULL); //FIXME
+
+  // use "placement new" to allocate UnwindCursor in the cursor buffer
+  switch (as->cpuType) {
+  case CPU_TYPE_I386:
+    new ((void *)cursor)
+        UnwindCursor<RemoteAddressSpace<Pointer32<LittleEndian>>,
+                     Registers_x86>(((unw_addr_space_i386 *)as)->oas, arg);
+    break;
+  case CPU_TYPE_X86_64:
+    new ((void *)cursor)
+        UnwindCursor<RemoteAddressSpace<Pointer64<LittleEndian>>,
+                     Registers_x86_64>(((unw_addr_space_x86_64 *)as)->oas, arg);
+    break;
+  case CPU_TYPE_POWERPC:
+    new ((void *)cursor)
+        UnwindCursor<RemoteAddressSpace<Pointer32<BigEndian>>,
+                     Registers_ppc>(((unw_addr_space_ppc *)as)->oas, arg);
+    break;
+  default:
+    return UNW_EUNSPEC;
+  }
+  return UNW_ESUCCESS;
+}
+
+
+static bool is64bit(task_t task) {
+  return false; // FIXME
+}
+
+/// Create an address_space object for use in examining another task.
+_LIBUNWIND_EXPORT unw_addr_space_t unw_create_addr_space_for_task(task_t task) {
+#if __i386__
+  if (is64bit(task)) {
+    unw_addr_space_x86_64 *as = new unw_addr_space_x86_64(task);
+    as->taskPort = task;
+    as->cpuType = CPU_TYPE_X86_64;
+    //as->oas
+  } else {
+    unw_addr_space_i386 *as = new unw_addr_space_i386(task);
+    as->taskPort = task;
+    as->cpuType = CPU_TYPE_I386;
+    //as->oas
+  }
+#else
+// FIXME
+#endif
+}
+
+
+/// Delete an address_space object.
+_LIBUNWIND_EXPORT void unw_destroy_addr_space(unw_addr_space_t asp) {
+  switch (asp->cpuType) {
+#if __i386__ || __x86_64__
+  case CPU_TYPE_I386: {
+    unw_addr_space_i386 *as = (unw_addr_space_i386 *)asp;
+    delete as;
+  }
+  break;
+  case CPU_TYPE_X86_64: {
+    unw_addr_space_x86_64 *as = (unw_addr_space_x86_64 *)asp;
+    delete as;
+  }
+  break;
+#endif
+  case CPU_TYPE_POWERPC: {
+    unw_addr_space_ppc *as = (unw_addr_space_ppc *)asp;
+    delete as;
+  }
+  break;
+  }
+}
+#endif // UNW_REMOTE
+
+
+/// Get value of specified register at cursor position in stack frame.
+_LIBUNWIND_EXPORT int unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum,
+                                  unw_word_t *value) {
+  _LIBUNWIND_TRACE_API("unw_get_reg(cursor=%p, regNum=%d, &value=%p)",
+                       static_cast<void *>(cursor), regNum,
+                       static_cast<void *>(value));
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  if (co->validReg(regNum)) {
+    *value = co->getReg(regNum);
+    return UNW_ESUCCESS;
+  }
+  return UNW_EBADREG;
+}
+
+
+/// Set value of specified register at cursor position in stack frame.
+_LIBUNWIND_EXPORT int unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum,
+                                  unw_word_t value) {
+  _LIBUNWIND_TRACE_API("unw_set_reg(cursor=%p, regNum=%d, value=0x%" PRIxPTR ")",
+                       static_cast<void *>(cursor), regNum, value);
+  typedef LocalAddressSpace::pint_t pint_t;
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  if (co->validReg(regNum)) {
+    co->setReg(regNum, (pint_t)value);
+    // specical case altering IP to re-find info (being called by personality
+    // function)
+    if (regNum == UNW_REG_IP) {
+      unw_proc_info_t info;
+      // First, get the FDE for the old location and then update it.
+      co->getInfo(&info);
+      co->setInfoBasedOnIPRegister(false);
+      // If the original call expects stack adjustment, perform this now.
+      // Normal frame unwinding would have included the offset already in the
+      // CFA computation.
+      // Note: for PA-RISC and other platforms where the stack grows up,
+      // this should actually be - info.gp. LLVM doesn't currently support
+      // any such platforms and Clang doesn't export a macro for them.
+      if (info.gp)
+        co->setReg(UNW_REG_SP, co->getReg(UNW_REG_SP) + info.gp);
+    }
+    return UNW_ESUCCESS;
+  }
+  return UNW_EBADREG;
+}
+
+
+/// Get value of specified float register at cursor position in stack frame.
+_LIBUNWIND_EXPORT int unw_get_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum,
+                                    unw_fpreg_t *value) {
+  _LIBUNWIND_TRACE_API("unw_get_fpreg(cursor=%p, regNum=%d, &value=%p)",
+                       static_cast<void *>(cursor), regNum,
+                       static_cast<void *>(value));
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  if (co->validFloatReg(regNum)) {
+    *value = co->getFloatReg(regNum);
+    return UNW_ESUCCESS;
+  }
+  return UNW_EBADREG;
+}
+
+
+/// Set value of specified float register at cursor position in stack frame.
+_LIBUNWIND_EXPORT int unw_set_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum,
+                                    unw_fpreg_t value) {
+#if defined(_LIBUNWIND_ARM_EHABI)
+  _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%llX)",
+                       static_cast<void *>(cursor), regNum, value);
+#else
+  _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%g)",
+                       static_cast<void *>(cursor), regNum, value);
+#endif
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  if (co->validFloatReg(regNum)) {
+    co->setFloatReg(regNum, value);
+    return UNW_ESUCCESS;
+  }
+  return UNW_EBADREG;
+}
+
+
+/// Move cursor to next frame.
+_LIBUNWIND_EXPORT int unw_step(unw_cursor_t *cursor) {
+  _LIBUNWIND_TRACE_API("unw_step(cursor=%p)", static_cast<void *>(cursor));
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  return co->step();
+}
+
+
+/// Get unwind info at cursor position in stack frame.
+_LIBUNWIND_EXPORT int unw_get_proc_info(unw_cursor_t *cursor,
+                                        unw_proc_info_t *info) {
+  _LIBUNWIND_TRACE_API("unw_get_proc_info(cursor=%p, &info=%p)",
+                       static_cast<void *>(cursor), static_cast<void *>(info));
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  co->getInfo(info);
+  if (info->end_ip == 0)
+    return UNW_ENOINFO;
+  else
+    return UNW_ESUCCESS;
+}
+
+
+/// Resume execution at cursor position (aka longjump).
+_LIBUNWIND_EXPORT int unw_resume(unw_cursor_t *cursor) {
+  _LIBUNWIND_TRACE_API("unw_resume(cursor=%p)", static_cast<void *>(cursor));
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  co->jumpto();
+  return UNW_EUNSPEC;
+}
+
+
+/// Get name of function at cursor position in stack frame.
+_LIBUNWIND_EXPORT int unw_get_proc_name(unw_cursor_t *cursor, char *buf,
+                                        size_t bufLen, unw_word_t *offset) {
+  _LIBUNWIND_TRACE_API("unw_get_proc_name(cursor=%p, &buf=%p, bufLen=%lu)",
+                       static_cast<void *>(cursor), static_cast<void *>(buf),
+                       static_cast<unsigned long>(bufLen));
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  if (co->getFunctionName(buf, bufLen, offset))
+    return UNW_ESUCCESS;
+  else
+    return UNW_EUNSPEC;
+}
+
+
+/// Checks if a register is a floating-point register.
+_LIBUNWIND_EXPORT int unw_is_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum) {
+  _LIBUNWIND_TRACE_API("unw_is_fpreg(cursor=%p, regNum=%d)",
+                       static_cast<void *>(cursor), regNum);
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  return co->validFloatReg(regNum);
+}
+
+
+/// Checks if a register is a floating-point register.
+_LIBUNWIND_EXPORT const char *unw_regname(unw_cursor_t *cursor,
+                                          unw_regnum_t regNum) {
+  _LIBUNWIND_TRACE_API("unw_regname(cursor=%p, regNum=%d)",
+                       static_cast<void *>(cursor), regNum);
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  return co->getRegisterName(regNum);
+}
+
+
+/// Checks if current frame is signal trampoline.
+_LIBUNWIND_EXPORT int unw_is_signal_frame(unw_cursor_t *cursor) {
+  _LIBUNWIND_TRACE_API("unw_is_signal_frame(cursor=%p)",
+                       static_cast<void *>(cursor));
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  return co->isSignalFrame();
+}
+
+#ifdef __arm__
+// Save VFP registers d0-d15 using FSTMIADX instead of FSTMIADD
+_LIBUNWIND_EXPORT void unw_save_vfp_as_X(unw_cursor_t *cursor) {
+  _LIBUNWIND_TRACE_API("unw_fpreg_save_vfp_as_X(cursor=%p)",
+                       static_cast<void *>(cursor));
+  AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
+  return co->saveVFPAsX();
+}
+#endif
+
+
+#if defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)
+/// SPI: walks cached DWARF entries
+_LIBUNWIND_EXPORT void unw_iterate_dwarf_unwind_cache(void (*func)(
+    unw_word_t ip_start, unw_word_t ip_end, unw_word_t fde, unw_word_t mh)) {
+  _LIBUNWIND_TRACE_API("unw_iterate_dwarf_unwind_cache(func=%p)",
+                       reinterpret_cast<void *>(func));
+  DwarfFDECache<LocalAddressSpace>::iterateCacheEntries(func);
+}
+
+
+/// IPI: for __register_frame()
+void _unw_add_dynamic_fde(unw_word_t fde) {
+  CFI_Parser<LocalAddressSpace>::FDE_Info fdeInfo;
+  CFI_Parser<LocalAddressSpace>::CIE_Info cieInfo;
+  const char *message = CFI_Parser<LocalAddressSpace>::decodeFDE(
+                           LocalAddressSpace::sThisAddressSpace,
+                          (LocalAddressSpace::pint_t) fde, &fdeInfo, &cieInfo);
+  if (message == NULL) {
+    // dynamically registered FDEs don't have a mach_header group they are in.
+    // Use fde as mh_group
+    unw_word_t mh_group = fdeInfo.fdeStart;
+    DwarfFDECache<LocalAddressSpace>::add((LocalAddressSpace::pint_t)mh_group,
+                                          fdeInfo.pcStart, fdeInfo.pcEnd,
+                                          fdeInfo.fdeStart);
+  } else {
+    _LIBUNWIND_DEBUG_LOG("_unw_add_dynamic_fde: bad fde: %s", message);
+  }
+}
+
+/// IPI: for __deregister_frame()
+void _unw_remove_dynamic_fde(unw_word_t fde) {
+  // fde is own mh_group
+  DwarfFDECache<LocalAddressSpace>::removeAllIn((LocalAddressSpace::pint_t)fde);
+}
+#endif // defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)
+#endif // !defined(__USING_SJLJ_EXCEPTIONS__)
+
+
+
+// Add logging hooks in Debug builds only
+#ifndef NDEBUG
+#include <stdlib.h>
+
+_LIBUNWIND_HIDDEN
+bool logAPIs() {
+  // do manual lock to avoid use of _cxa_guard_acquire or initializers
+  static bool checked = false;
+  static bool log = false;
+  if (!checked) {
+    log = (getenv("LIBUNWIND_PRINT_APIS") != NULL);
+    checked = true;
+  }
+  return log;
+}
+
+_LIBUNWIND_HIDDEN
+bool logUnwinding() {
+  // do manual lock to avoid use of _cxa_guard_acquire or initializers
+  static bool checked = false;
+  static bool log = false;
+  if (!checked) {
+    log = (getenv("LIBUNWIND_PRINT_UNWINDING") != NULL);
+    checked = true;
+  }
+  return log;
+}
+
+_LIBUNWIND_HIDDEN
+bool logDWARF() {
+  // do manual lock to avoid use of _cxa_guard_acquire or initializers
+  static bool checked = false;
+  static bool log = false;
+  if (!checked) {
+    log = (getenv("LIBUNWIND_PRINT_DWARF") != NULL);
+    checked = true;
+  }
+  return log;
+}
+
+#endif // NDEBUG
+