Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 386 insertions, 0 deletions

diff --git a/REORG.TODO/elf/sotruss-lib.c b/REORG.TODO/elf/sotruss-lib.c
new file mode 100644
index 0000000000..da2fedd52a
--- /dev/null
+++ b/REORG.TODO/elf/sotruss-lib.c
@@ -0,0 +1,386 @@
+/* Trace calls through PLTs and show caller, callee, and parameters.
+   Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <error.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <sys/uio.h>
+
+#include <ldsodefs.h>
+
+
+extern const char *__progname;
+extern const char *__progname_full;
+
+
+/* List of objects to trace calls from.  */
+static const char *fromlist;
+/* List of objects to trace calls to.  */
+static const char *tolist;
+
+/* If non-zero, also trace returns of the calls.  */
+static int do_exit;
+/* If non-zero print PID for each line.  */
+static int print_pid;
+
+/* The output stream to use.  */
+static FILE *out_file;
+
+
+static int
+match_pid (pid_t pid, const char *which)
+{
+  if (which == NULL || which[0] == '\0')
+    {
+      print_pid = 1;
+      return 1;
+    }
+
+  char *endp;
+  unsigned long n = strtoul (which, &endp, 0);
+  return *endp == '\0' && n == pid;
+}
+
+
+static void
+init (void)
+{
+  fromlist = getenv ("SOTRUSS_FROMLIST");
+  if (fromlist != NULL && fromlist[0] == '\0')
+    fromlist = NULL;
+  tolist = getenv ("SOTRUSS_TOLIST");
+  if (tolist != NULL && tolist[0] == '\0')
+    tolist = NULL;
+  do_exit = (getenv ("SOTRUSS_EXIT") ?: "")[0] != '\0';
+
+  /* Determine whether this process is supposed to be traced and if
+     yes, whether we should print into a file.  */
+  const char *which_process = getenv ("SOTRUSS_WHICH");
+  pid_t pid = getpid ();
+  int out_fd = -1;
+  if (match_pid (pid, which_process))
+    {
+      const char *out_filename = getenv ("SOTRUSS_OUTNAME");
+
+      if (out_filename != NULL && out_filename[0] != 0)
+	{
+	  size_t out_filename_len = strlen (out_filename) + 13;
+	  char fullname[out_filename_len];
+	  char *endp = stpcpy (fullname, out_filename);
+	  if (which_process == NULL || which_process[0] == '\0')
+	    snprintf (endp, 13, ".%ld", (long int) pid);
+
+	  out_fd = open (fullname, O_RDWR | O_CREAT | O_TRUNC, 0666);
+	  if (out_fd != -1)
+	    print_pid = 0;
+	}
+    }
+
+  /* If we do not write into a file write to stderr.  Duplicate the
+     descriptor so that we can keep printing in case the program
+     closes stderr.  Try first to allocate a descriptor with a value
+     usually not used as to minimize interference with the
+     program.  */
+  if (out_fd == -1)
+    {
+      out_fd = fcntl (STDERR_FILENO, F_DUPFD, 1000);
+      if (out_fd == -1)
+	out_fd = dup (STDERR_FILENO);
+    }
+
+  if (out_fd != -1)
+    {
+      /* Convert file descriptor into a stream.  */
+      out_file = fdopen (out_fd, "w");
+      if (out_file != NULL)
+	setlinebuf (out_file);
+    }
+}
+
+
+/* Audit interface verification.  We also initialize everything if
+   everything checks out OK.  */
+unsigned int
+la_version (unsigned int v)
+{
+  if (v != LAV_CURRENT)
+    error (1, 0, "cannot handle interface version %u", v);
+
+  init ();
+
+  return v;
+}
+
+
+/* Check whether a file name is on the colon-separated list of file
+   names.  */
+static unsigned int
+match_file (const char *list, const char *name, size_t name_len,
+	    unsigned int mask)
+{
+  if (list[0] == '\0')
+    return 0;
+
+  const char *cp = list;
+  while (1)
+    {
+      if (strncmp (cp, name, name_len) == 0
+	  && (cp[name_len] == ':' || cp[name_len] == '\0'))
+	return mask;
+
+      cp = strchr (cp, ':');
+      if (cp == NULL)
+	return 0;
+      ++cp;
+    }
+}
+
+
+unsigned int
+la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
+{
+  if (out_file == NULL)
+    return 0;
+
+  const char *full_name = map->l_name ?: "";
+  if (full_name[0] == '\0')
+    full_name = __progname_full;
+  size_t full_name_len = strlen (full_name);
+  const char *base_name = basename (full_name);
+  if (base_name[0] == '\0')
+    base_name = __progname;
+  size_t base_name_len = strlen (base_name);
+
+  int result = 0;
+  const char *print_name = NULL;
+  for (struct libname_list *l = map->l_libname; l != NULL; l = l->next)
+    {
+      if (print_name == NULL || (print_name[0] == '/' && l->name[0] != '/'))
+	print_name = l->name;
+
+      if (fromlist != NULL)
+	result |= match_file (fromlist, l->name, strlen (l->name),
+			      LA_FLG_BINDFROM);
+
+      if (tolist != NULL)
+	result |= match_file (tolist, l->name, strlen (l->name),LA_FLG_BINDTO);
+    }
+
+  if (print_name == NULL)
+    print_name = base_name;
+  if (print_name[0] == '\0')
+    print_name = __progname;
+
+  /* We cannot easily get to the object name in the PLT handling
+     functions.  Use the cookie to get the string pointer passed back
+     to us.  */
+  *cookie = (uintptr_t) print_name;
+
+  /* The object name has to be on the list of objects to trace calls
+     from or that list must be empty.  In the latter case we trace
+     only calls from the main binary.  */
+  if (fromlist == NULL)
+    result |= map->l_name[0] == '\0' ? LA_FLG_BINDFROM : 0;
+  else
+    result |= (match_file (fromlist, full_name, full_name_len,
+			   LA_FLG_BINDFROM)
+	       | match_file (fromlist, base_name, base_name_len,
+			     LA_FLG_BINDFROM));
+
+  /* The object name has to be on the list of objects to trace calls
+     to or that list must be empty.  In the latter case we trace
+     calls toall objects.  */
+  if (tolist == NULL)
+    result |= LA_FLG_BINDTO;
+  else
+    result |= (match_file (tolist, full_name, full_name_len, LA_FLG_BINDTO)
+	       | match_file (tolist, base_name, base_name_len, LA_FLG_BINDTO));
+
+  return result;
+}
+
+
+#if __ELF_NATIVE_CLASS == 32
+# define la_symbind la_symbind32
+typedef Elf32_Sym Elf_Sym;
+#else
+# define la_symbind la_symbind64
+typedef Elf64_Sym Elf_Sym;
+#endif
+
+uintptr_t
+la_symbind (Elf_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+	    uintptr_t *defcook, unsigned int *flags, const char *symname)
+{
+  if (!do_exit)
+    *flags = LA_SYMB_NOPLTEXIT;
+
+  return sym->st_value;
+}
+
+
+static void
+print_enter (uintptr_t *refcook, uintptr_t *defcook, const char *symname,
+	     unsigned long int reg1, unsigned long int reg2,
+	     unsigned long int reg3, unsigned int flags)
+{
+  char buf[3 * sizeof (pid_t) + 3];
+  buf[0] = '\0';
+  if (print_pid)
+    snprintf (buf, sizeof (buf), "%5ld: ", (long int) getpid ());
+
+  fprintf (out_file, "%s%15s -> %-15s:%s%s(0x%lx, 0x%lx, 0x%lx)\n",
+	   buf, (char *) *refcook, (char *) *defcook,
+	   (flags & LA_SYMB_NOPLTEXIT) ? "*" : " ", symname, reg1, reg2, reg3);
+}
+
+
+#ifdef __i386__
+Elf32_Addr
+la_i86_gnu_pltenter (Elf32_Sym *sym __attribute__ ((unused)),
+		     unsigned int ndx __attribute__ ((unused)),
+		     uintptr_t *refcook, uintptr_t *defcook,
+		     La_i86_regs *regs, unsigned int *flags,
+		     const char *symname, long int *framesizep)
+{
+  unsigned long int *sp = (unsigned long int *) regs->lr_esp;
+
+  print_enter (refcook, defcook, symname, sp[1], sp[2], sp[3], *flags);
+
+  /* No need to copy anything, we will not need the parameters in any case.  */
+  *framesizep = 0;
+
+  return sym->st_value;
+}
+#elif defined __x86_64__
+Elf64_Addr
+la_x86_64_gnu_pltenter (Elf64_Sym *sym __attribute__ ((unused)),
+			unsigned int ndx __attribute__ ((unused)),
+			uintptr_t *refcook, uintptr_t *defcook,
+			La_x86_64_regs *regs, unsigned int *flags,
+			const char *symname, long int *framesizep)
+{
+  print_enter (refcook, defcook, symname,
+	       regs->lr_rdi, regs->lr_rsi, regs->lr_rdx, *flags);
+
+  /* No need to copy anything, we will not need the parameters in any case.  */
+  *framesizep = 0;
+
+  return sym->st_value;
+}
+#elif defined __sparc__ && !defined __arch64__
+Elf32_Addr
+la_sparc32_gnu_pltenter (Elf32_Sym *sym __attribute__ ((unused)),
+			 unsigned int ndx __attribute__ ((unused)),
+			 uintptr_t *refcook, uintptr_t *defcook,
+			 La_sparc32_regs *regs, unsigned int *flags,
+			 const char *symname, long int *framesizep)
+{
+  print_enter (refcook, defcook, symname,
+	       regs->lr_reg[0], regs->lr_reg[1], regs->lr_reg[2],
+	       *flags);
+
+  /* No need to copy anything, we will not need the parameters in any case.  */
+  *framesizep = 0;
+
+  return sym->st_value;
+}
+#elif defined __sparc__ && defined __arch64__
+Elf64_Addr
+la_sparc64_gnu_pltenter (Elf64_Sym *sym __attribute__ ((unused)),
+			 unsigned int ndx __attribute__ ((unused)),
+			 uintptr_t *refcook, uintptr_t *defcook,
+			 La_sparc64_regs *regs, unsigned int *flags,
+			 const char *symname, long int *framesizep)
+{
+  print_enter (refcook, defcook, symname,
+	       regs->lr_reg[0], regs->lr_reg[1], regs->lr_reg[2],
+	       *flags);
+
+  /* No need to copy anything, we will not need the parameters in any case.  */
+  *framesizep = 0;
+
+  return sym->st_value;
+}
+#elif !defined HAVE_ARCH_PLTENTER
+# warning "pltenter for architecture not supported"
+#endif
+
+
+static void
+print_exit (uintptr_t *refcook, uintptr_t *defcook, const char *symname,
+	    unsigned long int reg)
+{
+  char buf[3 * sizeof (pid_t) + 3];
+  buf[0] = '\0';
+  if (print_pid)
+    snprintf (buf, sizeof (buf), "%5ld: ", (long int) getpid ());
+
+  fprintf (out_file, "%s%15s -> %-15s:%s%s - 0x%lx\n",
+	   buf, (char *) *refcook, (char *) *defcook, " ", symname, reg);
+}
+
+
+#ifdef __i386__
+unsigned int
+la_i86_gnu_pltexit (Elf32_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+		    uintptr_t *defcook, const struct La_i86_regs *inregs,
+		    struct La_i86_retval *outregs, const char *symname)
+{
+  print_exit (refcook, defcook, symname, outregs->lrv_eax);
+
+  return 0;
+}
+#elif defined __x86_64__
+unsigned int
+la_x86_64_gnu_pltexit (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+		       uintptr_t *defcook, const struct La_x86_64_regs *inregs,
+		       struct La_x86_64_retval *outregs, const char *symname)
+{
+  print_exit (refcook, defcook, symname, outregs->lrv_rax);
+
+  return 0;
+}
+#elif defined __sparc__ && !defined __arch64__
+unsigned int
+la_sparc32_gnu_pltexit (Elf32_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+			uintptr_t *defcook, const struct La_sparc32_regs *inregs,
+			struct La_sparc32_retval *outregs, const char *symname)
+{
+  print_exit (refcook, defcook, symname, outregs->lrv_reg[0]);
+
+  return 0;
+}
+#elif defined __sparc__ && defined __arch64__
+unsigned int
+la_sparc64_gnu_pltexit (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+			uintptr_t *defcook, const struct La_sparc64_regs *inregs,
+			struct La_sparc64_retval *outregs, const char *symname)
+{
+  print_exit (refcook, defcook, symname, outregs->lrv_reg[0]);
+
+  return 0;
+}
+#elif !defined HAVE_ARCH_PLTEXIT
+# warning "pltexit for architecture not supported"
+#endif