Merging upstream version 1.45.3+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 346 insertions, 0 deletions

diff --git a/src/fluent-bit/lib/libbacktrace-8602fda/fileline.c b/src/fluent-bit/lib/libbacktrace-8602fda/fileline.c
new file mode 100644
index 000000000..0472f4721
--- /dev/null
+++ b/src/fluent-bit/lib/libbacktrace-8602fda/fileline.c
@@ -0,0 +1,346 @@
+/* fileline.c -- Get file and line number information in a backtrace.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+   Written by Ian Lance Taylor, Google.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    (1) Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+    (2) Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+
+    (3) The name of the author may not be used to
+    endorse or promote products derived from this software without
+    specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.  */
+
+#include "config.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#if defined (HAVE_KERN_PROC_ARGS) || defined (HAVE_KERN_PROC)
+#include <sys/sysctl.h>
+#endif
+
+#ifdef HAVE_MACH_O_DYLD_H
+#include <mach-o/dyld.h>
+#endif
+
+#include "backtrace.h"
+#include "internal.h"
+
+#ifndef HAVE_GETEXECNAME
+#define getexecname() NULL
+#endif
+
+#if !defined (HAVE_KERN_PROC_ARGS) && !defined (HAVE_KERN_PROC)
+
+#define sysctl_exec_name1(state, error_callback, data) NULL
+#define sysctl_exec_name2(state, error_callback, data) NULL
+
+#else /* defined (HAVE_KERN_PROC_ARGS) || |defined (HAVE_KERN_PROC) */
+
+static char *
+sysctl_exec_name (struct backtrace_state *state,
+		  int mib0, int mib1, int mib2, int mib3,
+		  backtrace_error_callback error_callback, void *data)
+{
+  int mib[4];
+  size_t len;
+  char *name;
+  size_t rlen;
+
+  mib[0] = mib0;
+  mib[1] = mib1;
+  mib[2] = mib2;
+  mib[3] = mib3;
+
+  if (sysctl (mib, 4, NULL, &len, NULL, 0) < 0)
+    return NULL;
+  name = (char *) backtrace_alloc (state, len, error_callback, data);
+  if (name == NULL)
+    return NULL;
+  rlen = len;
+  if (sysctl (mib, 4, name, &rlen, NULL, 0) < 0)
+    {
+      backtrace_free (state, name, len, error_callback, data);
+      return NULL;
+    }
+  return name;
+}
+
+#ifdef HAVE_KERN_PROC_ARGS
+
+static char *
+sysctl_exec_name1 (struct backtrace_state *state,
+		   backtrace_error_callback error_callback, void *data)
+{
+  /* This variant is used on NetBSD.  */
+  return sysctl_exec_name (state, CTL_KERN, KERN_PROC_ARGS, -1,
+			   KERN_PROC_PATHNAME, error_callback, data);
+}
+
+#else
+
+#define sysctl_exec_name1(state, error_callback, data) NULL
+
+#endif
+
+#ifdef HAVE_KERN_PROC
+
+static char *
+sysctl_exec_name2 (struct backtrace_state *state,
+		   backtrace_error_callback error_callback, void *data)
+{
+  /* This variant is used on FreeBSD.  */
+  return sysctl_exec_name (state, CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1,
+			   error_callback, data);
+}
+
+#else
+
+#define sysctl_exec_name2(state, error_callback, data) NULL
+
+#endif
+
+#endif /* defined (HAVE_KERN_PROC_ARGS) || |defined (HAVE_KERN_PROC) */
+
+#ifdef HAVE_MACH_O_DYLD_H
+
+static char *
+macho_get_executable_path (struct backtrace_state *state,
+			   backtrace_error_callback error_callback, void *data)
+{
+  uint32_t len;
+  char *name;
+
+  len = 0;
+  if (_NSGetExecutablePath (NULL, &len) == 0)
+    return NULL;
+  name = (char *) backtrace_alloc (state, len, error_callback, data);
+  if (name == NULL)
+    return NULL;
+  if (_NSGetExecutablePath (name, &len) != 0)
+    {
+      backtrace_free (state, name, len, error_callback, data);
+      return NULL;
+    }
+  return name;
+}
+
+#else /* !defined (HAVE_MACH_O_DYLD_H) */
+
+#define macho_get_executable_path(state, error_callback, data) NULL
+
+#endif /* !defined (HAVE_MACH_O_DYLD_H) */
+
+/* Initialize the fileline information from the executable.  Returns 1
+   on success, 0 on failure.  */
+
+static int
+fileline_initialize (struct backtrace_state *state,
+		     backtrace_error_callback error_callback, void *data)
+{
+  int failed;
+  fileline fileline_fn;
+  int pass;
+  int called_error_callback;
+  int descriptor;
+  const char *filename;
+  char buf[64];
+
+  if (!state->threaded)
+    failed = state->fileline_initialization_failed;
+  else
+    failed = backtrace_atomic_load_int (&state->fileline_initialization_failed);
+
+  if (failed)
+    {
+      error_callback (data, "failed to read executable information", -1);
+      return 0;
+    }
+
+  if (!state->threaded)
+    fileline_fn = state->fileline_fn;
+  else
+    fileline_fn = backtrace_atomic_load_pointer (&state->fileline_fn);
+  if (fileline_fn != NULL)
+    return 1;
+
+  /* We have not initialized the information.  Do it now.  */
+
+  descriptor = -1;
+  called_error_callback = 0;
+  for (pass = 0; pass < 8; ++pass)
+    {
+      int does_not_exist;
+
+      switch (pass)
+	{
+	case 0:
+	  filename = state->filename;
+	  break;
+	case 1:
+	  filename = getexecname ();
+	  break;
+	case 2:
+	  filename = "/proc/self/exe";
+	  break;
+	case 3:
+	  filename = "/proc/curproc/file";
+	  break;
+	case 4:
+	  snprintf (buf, sizeof (buf), "/proc/%ld/object/a.out",
+		    (long) getpid ());
+	  filename = buf;
+	  break;
+	case 5:
+	  filename = sysctl_exec_name1 (state, error_callback, data);
+	  break;
+	case 6:
+	  filename = sysctl_exec_name2 (state, error_callback, data);
+	  break;
+	case 7:
+	  filename = macho_get_executable_path (state, error_callback, data);
+	  break;
+	default:
+	  abort ();
+	}
+
+      if (filename == NULL)
+	continue;
+
+      descriptor = backtrace_open (filename, error_callback, data,
+				   &does_not_exist);
+      if (descriptor < 0 && !does_not_exist)
+	{
+	  called_error_callback = 1;
+	  break;
+	}
+      if (descriptor >= 0)
+	break;
+    }
+
+  if (descriptor < 0)
+    {
+      if (!called_error_callback)
+	{
+	  if (state->filename != NULL)
+	    error_callback (data, state->filename, ENOENT);
+	  else
+	    error_callback (data,
+			    "libbacktrace could not find executable to open",
+			    0);
+	}
+      failed = 1;
+    }
+
+  if (!failed)
+    {
+      if (!backtrace_initialize (state, filename, descriptor, error_callback,
+				 data, &fileline_fn))
+	failed = 1;
+    }
+
+  if (failed)
+    {
+      if (!state->threaded)
+	state->fileline_initialization_failed = 1;
+      else
+	backtrace_atomic_store_int (&state->fileline_initialization_failed, 1);
+      return 0;
+    }
+
+  if (!state->threaded)
+    state->fileline_fn = fileline_fn;
+  else
+    {
+      backtrace_atomic_store_pointer (&state->fileline_fn, fileline_fn);
+
+      /* Note that if two threads initialize at once, one of the data
+	 sets may be leaked.  */
+    }
+
+  return 1;
+}
+
+/* Given a PC, find the file name, line number, and function name.  */
+
+int
+backtrace_pcinfo (struct backtrace_state *state, uintptr_t pc,
+		  backtrace_full_callback callback,
+		  backtrace_error_callback error_callback, void *data)
+{
+  if (!fileline_initialize (state, error_callback, data))
+    return 0;
+
+  if (state->fileline_initialization_failed)
+    return 0;
+
+  return state->fileline_fn (state, pc, callback, error_callback, data);
+}
+
+/* Given a PC, find the symbol for it, and its value.  */
+
+int
+backtrace_syminfo (struct backtrace_state *state, uintptr_t pc,
+		   backtrace_syminfo_callback callback,
+		   backtrace_error_callback error_callback, void *data)
+{
+  if (!fileline_initialize (state, error_callback, data))
+    return 0;
+
+  if (state->fileline_initialization_failed)
+    return 0;
+
+  state->syminfo_fn (state, pc, callback, error_callback, data);
+  return 1;
+}
+
+/* A backtrace_syminfo_callback that can call into a
+   backtrace_full_callback, used when we have a symbol table but no
+   debug info.  */
+
+void
+backtrace_syminfo_to_full_callback (void *data, uintptr_t pc,
+				    const char *symname,
+				    uintptr_t symval ATTRIBUTE_UNUSED,
+				    uintptr_t symsize ATTRIBUTE_UNUSED)
+{
+  struct backtrace_call_full *bdata = (struct backtrace_call_full *) data;
+
+  bdata->ret = bdata->full_callback (bdata->full_data, pc, NULL, 0, symname);
+}
+
+/* An error callback that corresponds to
+   backtrace_syminfo_to_full_callback.  */
+
+void
+backtrace_syminfo_to_full_error_callback (void *data, const char *msg,
+					  int errnum)
+{
+  struct backtrace_call_full *bdata = (struct backtrace_call_full *) data;
+
+  bdata->full_error_callback (bdata->full_data, msg, errnum);
+}