6885 CTF Everywhere Part 1

6886 Want ctfdiff
6887 ctfdump should be written in terms of libctf
6888 ctfmerge should be implemented in terms of libctf
6889 ctfconvert should be implemented in terms of libctf
6890 Want general workq
6891 Want general mergeq
6892 ctf_add_encoded assigns() incorrect byte size to types
6893 ctf_add_{struct,union,enum} can reuse forwards
6894 ctf_add_{struct,union,enum} occasionally forget to dirty the ctf_file_t
6895 ctf_add_member could better handle bitfields
6896 ctf_type_size() reports wrong size for forwards
6897 Want libctf ctf_kind_name() function
6898 Want libctf function to set struct/union size
Portions contributed by: John Levon <john.levon@joyent.com>
Portions contributed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: John Levon <john.levon@joyent.com>
Reviewed by: Andy Fiddaman <andy@omniosce.org>
Reviewed by: Gergő Doma <domag02@gmail.com>
Approved by: Dan McDonald <danmcd@joyent.com>

1 files changed, 171 insertions, 0 deletions

diff --git a/usr/src/lib/libdwarf/common/dwarf_ranges.c b/usr/src/lib/libdwarf/common/dwarf_ranges.c
new file mode 100644
index 0000000000..ae6d5cf9b5
--- /dev/null
+++ b/usr/src/lib/libdwarf/common/dwarf_ranges.c
@@ -0,0 +1,171 @@
+/*
+
+  Copyright (C) 2008-2010 David Anderson. All Rights Reserved.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms of version 2.1 of the GNU Lesser General Public License 
+  as published by the Free Software Foundation.
+
+  This program is distributed in the hope that it would be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
+
+  Further, this software is distributed without any warranty that it is
+  free of the rightful claim of any third person regarding infringement 
+  or the like.  Any license provided herein, whether implied or 
+  otherwise, applies only to this software file.  Patent licenses, if
+  any, provided herein do not apply to combinations of this program with 
+  other software, or any other product whatsoever.  
+
+  You should have received a copy of the GNU Lesser General Public 
+  License along with this program; if not, write the Free Software 
+  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301,
+  USA.
+
+  Contact information:  Silicon Graphics, Inc., 1500 Crittenden Lane,
+  Mountain View, CA 94043, or:
+
+  http://www.sgi.com
+
+  For further information regarding this notice, see:
+
+  http://oss.sgi.com/projects/GenInfo/NoticeExplan
+
+*/
+/* The address of the Free Software Foundation is
+   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 
+   Boston, MA 02110-1301, USA.
+   SGI has moved from the Crittenden Lane address.
+*/
+
+
+
+#include "config.h"
+#include <stdlib.h>
+#include "dwarf_incl.h"
+
+struct ranges_entry {
+   struct ranges_entry *next;
+   Dwarf_Ranges cur;
+};
+
+
+#define MAX_ADDR ((address_size == 8)?0xffffffffffffffffULL:0xffffffff)
+int dwarf_get_ranges_a(Dwarf_Debug dbg,
+    Dwarf_Off rangesoffset,
+    Dwarf_Die die,
+    Dwarf_Ranges ** rangesbuf,
+    Dwarf_Signed * listlen,
+    Dwarf_Unsigned * bytecount,
+    Dwarf_Error * error)
+{
+    Dwarf_Small *rangeptr = 0;
+    Dwarf_Small *beginrangeptr = 0;
+    Dwarf_Small *section_end = 0;
+    unsigned entry_count = 0;
+    struct ranges_entry *base = 0;
+    struct ranges_entry *last = 0;
+    struct ranges_entry *curre = 0;
+    Dwarf_Ranges * ranges_data_out = 0;
+    unsigned copyindex = 0;
+    Dwarf_Half address_size = 0;
+    int res = DW_DLV_ERROR;
+
+    res = _dwarf_load_section(dbg, &dbg->de_debug_ranges,error);
+    if (res != DW_DLV_OK) {
+        return res;
+    }
+    if(rangesoffset >= dbg->de_debug_ranges.dss_size) {
+        _dwarf_error(dbg, error, DW_DLE_DEBUG_RANGES_OFFSET_BAD);
+        return (DW_DLV_ERROR);
+
+    }
+    address_size = _dwarf_get_address_size(dbg, die);
+    section_end = dbg->de_debug_ranges.dss_data + 
+        dbg->de_debug_ranges.dss_size;
+    rangeptr = dbg->de_debug_ranges.dss_data + rangesoffset;
+    beginrangeptr = rangeptr;
+
+    for(;;) {
+        struct ranges_entry * re = calloc(sizeof(struct ranges_entry),1);
+        if(!re) {
+            _dwarf_error(dbg, error, DW_DLE_DEBUG_RANGES_OUT_OF_MEM);
+            return (DW_DLV_ERROR);
+        }
+        if(rangeptr  >= section_end) {
+            return (DW_DLV_NO_ENTRY);
+        }
+        if((rangeptr + (2*address_size)) > section_end) {
+            _dwarf_error(dbg, error, DW_DLE_DEBUG_RANGES_OFFSET_BAD);
+            return (DW_DLV_ERROR);
+        }
+        entry_count++;
+        READ_UNALIGNED(dbg,re->cur.dwr_addr1,
+                       Dwarf_Addr, rangeptr,
+                       address_size);
+        rangeptr +=  address_size;
+        READ_UNALIGNED(dbg,re->cur.dwr_addr2 ,
+                       Dwarf_Addr, rangeptr,
+                       address_size);
+        rangeptr +=  address_size;
+        if(!base) {
+           base = re;
+           last = re;
+        } else {
+           last->next = re;
+           last = re;
+        }
+        if(re->cur.dwr_addr1 == 0 && re->cur.dwr_addr2 == 0) {
+            re->cur.dwr_type =  DW_RANGES_END;
+            break;
+        } else if ( re->cur.dwr_addr1 == MAX_ADDR) {
+            re->cur.dwr_type =  DW_RANGES_ADDRESS_SELECTION;
+        } else {
+            re->cur.dwr_type =  DW_RANGES_ENTRY;
+        }
+    }
+
+    ranges_data_out =   (Dwarf_Ranges *)
+    _dwarf_get_alloc(dbg,DW_DLA_RANGES,entry_count);
+    if(!ranges_data_out) {
+            _dwarf_error(dbg, error, DW_DLE_DEBUG_RANGES_OUT_OF_MEM);
+            return (DW_DLV_ERROR);
+    }
+    curre = base;
+    *rangesbuf = ranges_data_out;
+    *listlen = entry_count;
+    for( copyindex = 0; curre && (copyindex < entry_count); 
+        ++copyindex,++ranges_data_out) {
+
+        struct ranges_entry *r = curre;
+        *ranges_data_out = curre->cur;
+        curre = curre->next;
+        free(r);
+    }
+    /* Callers will often not care about the bytes used. */
+    if(bytecount) {
+        *bytecount = rangeptr - beginrangeptr;
+    }
+    return DW_DLV_OK; 
+}
+int dwarf_get_ranges(Dwarf_Debug dbg,
+    Dwarf_Off rangesoffset,
+    Dwarf_Ranges ** rangesbuf,
+    Dwarf_Signed * listlen,
+    Dwarf_Unsigned * bytecount,
+    Dwarf_Error * error)
+{
+    Dwarf_Die die = 0;
+    int res = dwarf_get_ranges_a(dbg,rangesoffset,die,
+        rangesbuf,listlen,bytecount,error);
+    return res;
+}
+
+void 
+dwarf_ranges_dealloc(Dwarf_Debug dbg, Dwarf_Ranges * rangesbuf,
+    Dwarf_Signed rangecount)
+{
+    dwarf_dealloc(dbg,rangesbuf, DW_DLA_RANGES);
+   
+}
+