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reflect.c
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reflect.c
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/*
* j2 - A simple concatenative programming language that can understand
* the structure of and dynamically link with compatible C binaries.
*
* Copyright (C) 2011 Jason Nyberg <[email protected]>
* Copyright (C) 2018 Jason Nyberg <[email protected]> (dual-licensed)
* (C) Copyright 2019 Hewlett Packard Enterprise Development LP.
*
* This file is part of j2.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of either
*
* * the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at
* your option) any later version
*
* or
*
* * the GNU General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at
* your option) any later version
*
* or both in parallel, as here.
*
* j2 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
* General Public License for more details.
*
* You should have received copies of the GNU General Public License and
* the GNU Lesser General Public License along with this program. If
* not, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE // strndupa, stpcpy
#define __USE_GNU // strndupa, stpcpy
#include <sys/types.h> /* For open() */
#include <sys/stat.h> /* For open() */
#include <fcntl.h> /* For open() */
#include <unistd.h> /* For close() */
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <libdwarf/dwarf.h>
#include <libdwarf/libdwarf.h>
#include <dlfcn.h> // dlopen/dlsym/dlclose
#include <arpa/inet.h>
#include <ffi.h>
#include "util.h"
#include "listree.h"
#include "reflect.h"
#include "vm.h"
#include "extensions.h"
static int cif_curate_module(LTV *module, int bootstrap);
LTV *cif_module = NULL; // initialized/populated during bootstrap
void cif_init(int bootstrap) {
if (!cif_module) {
Dl_info dl_info;
dladdr((void *)cif_init, &dl_info);
fprintf(stderr, CODE_RED "reflection module path is: %s" CODE_RESET "\n", dl_info.dli_fname);
cif_module = LTV_init(NEW(LTV), (char *)dl_info.dli_fname, strlen(dl_info.dli_fname), LT_DUP | LT_RO);
cif_preview_module(cif_module);
print_ltv(stderr, CODE_RED, cif_module, CODE_RESET "\n", 0);
cif_curate_module(cif_module, bootstrap);
}
}
char *Type_pushUVAL(TYPE_UVALUE *uval,char *buf);
TYPE_UVALUE *Type_pullUVAL(TYPE_UVALUE *uval,char *buf);
TYPE_UTYPE Type_getUVAL(LTV *cvar,TYPE_UVALUE *uval);
int Type_putUVAL(LTV *cvar,TYPE_UVALUE *uval);
/////////////////////////////////////////////////////////////
LTV *attr_set(LTV *ltv,char *attr,char *val) { return LT_put(ltv,attr,TAIL,LTV_init(NEW(LTV),val,-1,LT_DUP)); }
LTV *attr_own(LTV *ltv,char *attr,char *val) { return LT_put(ltv,attr,TAIL,LTV_init(NEW(LTV),val,-1,LT_OWN)); }
LTV *attr_imm(LTV *ltv,char *attr,long long imm) { return LT_put(ltv,attr,TAIL,LTV_init(NEW(LTV),(void *) imm,0,LT_IMM)); }
//extern char *attr_get(LTV *ltv,char *attr);
//extern void attr_del(LTV *ltv,char *attr);
extern char *attr_get(LTV *ltv,char *attr)
{
LTV *attr_ltv=LT_get(ltv,attr,TAIL,KEEP);
return attr_ltv?attr_ltv->data:NULL;
}
extern void attr_del(LTV *ltv,char *attr) { LTV_erase(ltv,LTI_resolve(ltv,attr,false)); }
// look up an attribute in one LTV, and look up it's value within another LTV.
extern char *attr_deref(LTV *ltv,char *attr,LTV *index)
{
char *attr_val=attr_get(ltv,attr);
return attr_val?attr_get(index,attr_val):NULL;
}
/////////////////////////////////////////////////////////////
//
// Dwarf Traversal
//
/////////////////////////////////////////////////////////////
typedef enum {
RDW_none =0x0,
RDW_is_info =0x1,
RDW_traverse_sibs =0x2,
} DIEWALK_FLAGS;
typedef int (*DIE_OP)(Dwarf_Debug dbg,Dwarf_Die die,DIEWALK_FLAGS flags);
int traverse_siblings(Dwarf_Debug dbg,Dwarf_Die die,DIE_OP op,DIEWALK_FLAGS flags)
{
int status=0;
Dwarf_Error error=0;
Dwarf_Die sibling=0;
iterate:
if (die)
STRY(op(dbg,die,flags),"operate on die");
// else get first die
TRY(dwarf_siblingof_b(dbg,die,(flags&RDW_is_info)!=0,&sibling,&error),"retrieve dwarf_sibling");
CATCH(status==DW_DLV_NO_ENTRY,0,goto done,"check for DW_DLV_NO_ENTRY"); /* Done at this level. */
CATCH(dwarf_errno(error)==DW_DLE_DBG_NO_CU_CONTEXT,1,goto done,"check for DW_DLE_DBG_NO_CU_CONTEX %s",dwarf_errmsg(error));
SCATCH("check dwarf_siblingof");
if (die)
dwarf_dealloc(dbg,die,DW_DLA_DIE);
if ((!die || (flags&RDW_traverse_sibs)) && (die=sibling))
goto iterate;
done:
return status;
}
int traverse_child(Dwarf_Debug dbg,Dwarf_Die die,DIE_OP op,DIEWALK_FLAGS flags)
{
int status=0;
Dwarf_Error error=0;
Dwarf_Die child=0;
TRY(dwarf_child(die,&child,&error),"retrieve dwarf_child");
CATCH(status==DW_DLV_NO_ENTRY,0,goto done,"check dwarf child's existence");
SCATCH("check dwarf_child for error");
STRY(traverse_siblings(dbg,child,op,flags),"process %s",flags&RDW_traverse_sibs?"children":"child");
done:
return status;
}
static char *DW_IDX_STRING[] = {"header_cu_type==0 (invalid)",
"DW_UT_compile",
"DW_UT_type",
"DW_UT_partial",
"DW_UT_skeleton",
"DW_UT_split_compile",
"DW_UT_split_type",
"DW_UT_lo_user",
"DW_UT_hi_user" };
int traverse_cus(char *filename,DIE_OP op,CU_DATA *cu_data,DIEWALK_FLAGS flags)
{
int status=0;
Dwarf_Debug dbg;
Dwarf_Error error=0;
int read_cu_list() {
CU_DATA cu_data_local;
if (!cu_data) cu_data=&cu_data_local; // allow caller to not care
Dwarf_Die die;
while (1) {
TRY(dwarf_next_cu_header_d(dbg,
(flags&RDW_is_info)!=0,
&cu_data->header_length,
&cu_data->version_stamp,
&cu_data->abbrev_offset,
&cu_data->address_size,
&cu_data->length_size,
&cu_data->extension_size,
&cu_data->sig8,
&cu_data->offset,
&cu_data->next_cu_header_offset,
&cu_data->header_cu_type,
&error),
"read next cu header");
DWARF_ID(cu_data->next_cu_header_offset_str,cu_data->next_cu_header_offset);
CATCH(status==DW_DLV_NO_ENTRY,0,goto done,"check for no next cu header");
CATCH(status!=DW_DLV_OK,status,goto done,"check error dwarf_next_cu_header");
static char alias[32];
DWARF_ALIAS(alias,cu_data->sig8);
DEBUG(fprintf(stdout,CODE_BLUE "Read a CU header, offset 0x%x sig8 %s cu_type %s" CODE_RESET "\n",
cu_data->offset,alias,DW_IDX_STRING[cu_data->header_cu_type]));
STRY(traverse_siblings(dbg,NULL,op,flags),"process cu die and sibs");
}
done:
return status;
}
LTV *debug_link_filename=get_separated_debug_filename(filename);
if (debug_link_filename) {
fprintf(stderr,"Using alt debug filename %s for %s\n",(char *) debug_link_filename->data,filename);
filename=(char *) debug_link_filename->data;
}
int filedesc = -1;
STRY((filedesc=open(filename,O_RDONLY))<0,"open dwarf2edict input file %s",filename);
TRYCATCH(dwarf_init(filedesc,DW_DLC_READ,NULL,NULL,&dbg,&error),status,close_file,"initialize dwarf reader");
TRYCATCH(read_cu_list(),status,close_dwarf,"read cu list");
close_dwarf:
STRY(dwarf_finish(dbg,&error),"finalize dwarf reader");
close_file:
close(filedesc);
done:
LTV_release(debug_link_filename);
return status;
}
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
int print_cu_data(FILE *ofile,CU_DATA *cu_data)
{
int status=0;
STRY(!cu_data,"validate cu data");
fprintf(ofile,"CU DATA");
#define output_cu_field(fmt,field) fprintf(ofile,"|" #field fmt,cu_data->field)
output_cu_field("%s",offset_str);
output_cu_field("%s",next_cu_header_offset_str);
output_cu_field("%x",header_length);
output_cu_field("%x",version_stamp);
output_cu_field("%x",abbrev_offset);
output_cu_field("%x",address_size);
output_cu_field("%x",length_size);
output_cu_field("%x",extension_size);
output_cu_field("%s",dwo_name);
output_cu_field("%s",linkage_name);
done:
return status;
}
int dot_cu_data(FILE *ofile,CU_DATA *cu_data)
{
int status=0;
STRY(!cu_data,"validate cu data");
fprintf(ofile,CVAR_FORMAT " [shape=record label=\"{");
print_cu_data(ofile,cu_data);
fprintf(ofile,"}\"");
fprintf(ofile,"]\n");
done:
return status;
}
int print_type_info(FILE *ofile,LTV *ltv)
{
int status=0;
if (!(ltv->flags & LT_TYPE))
goto done;
TYPE_INFO_LTV *type_info = (TYPE_INFO_LTV *) ltv;
fprintf(ofile, "|TYPE_INFO %s", type_info->id_str);
const char *str=NULL;
static char alias[32];
DWARF_ALIAS(alias,type_info->sig8);
dwarf_get_TAG_name(type_info->tag,&str);
fprintf(ofile,"|%s",str+7);
if (type_info->flags&TYPEF_BASE) fprintf(ofile,"|base %s", type_info->base_str);
if (type_info->flags&TYPEF_CONSTVAL) fprintf(ofile,"|constval 0x%x", type_info->const_value);
if (type_info->flags&TYPEF_BYTESIZE) fprintf(ofile,"|bytesize %u", type_info->bytesize);
if (type_info->flags&TYPEF_BITSIZE) fprintf(ofile,"|bitsize %u", type_info->bitsize);
if (type_info->flags&TYPEF_BITOFFSET) fprintf(ofile,"|bitoffset %u", type_info->bitoffset);
if (type_info->flags&TYPEF_ENCODING) fprintf(ofile,"|encoding %u", type_info->encoding);
if (type_info->flags&TYPEF_UPPERBOUND) fprintf(ofile,"|upperbound 0x%x",type_info->upper_bound);
if (type_info->flags&TYPEF_LOWPC) fprintf(ofile,"|lowpc 0x%x", type_info->low_pc);
if (type_info->flags&TYPEF_MEMBERLOC) fprintf(ofile,"|member loc 0x%x",type_info->data_member_location);
if (type_info->flags&TYPEF_LOCATION) fprintf(ofile,"|location 0x%x", type_info->location);
if (type_info->flags&TYPEF_ADDR) fprintf(ofile,"|addr 0x%x", type_info->addr);
if (type_info->flags&TYPEF_EXTERNAL) fprintf(ofile,"|external %u", type_info->external);
if (type_info->flags&TYPEF_SYMBOLIC) fprintf(ofile,"|symbolic");
if (type_info->flags&TYPEF_OFFSET) fprintf(ofile,"|offset %x", type_info->offset);
if (type_info->flags&TYPEF_IS_INFO) fprintf(ofile,"|info");
if (type_info->flags&TYPEF_IS_DECL) fprintf(ofile,"|decl");
if (type_info->flags&TYPEF_SIGNATURE) fprintf(ofile,"|sig %s", alias);
done:
return status;
}
int dot_type_info(FILE *ofile, LTV *ltv) {
int status = 0;
fprintf(ofile, "shape=record color=%s style=filled label=\"{{CVAR(%x)", ltv->flags & LT_RO ? "red" : "black", ltv->data);
print_type_info(ofile, ltv);
fprintf(ofile, "}}\"");
if (!(ltv->flags & LT_TYPE)) {
fprintf(ofile, " fillcolor=beige");
goto done;
}
TYPE_INFO_LTV *type_info = (TYPE_INFO_LTV *) ltv;
switch (type_info->tag) {
case DW_TAG_compile_unit: fprintf(ofile, " fillcolor=red rank=max"); break;
case DW_TAG_subprogram: fprintf(ofile, " fillcolor=orange"); break;
case DW_TAG_subroutine_type: fprintf(ofile, " fillcolor=darkorange"); break;
case DW_TAG_formal_parameter: fprintf(ofile, " fillcolor=gold"); break;
case DW_TAG_variable: fprintf(ofile, " fillcolor=cyan"); break;
case DW_TAG_typedef: fprintf(ofile, " fillcolor=green"); break;
case DW_TAG_structure_type: fprintf(ofile, " fillcolor=blue"); break;
case DW_TAG_class_type: fprintf(ofile, " fillcolor=blue"); break;
case DW_TAG_union_type: fprintf(ofile, " fillcolor=violet"); break;
case DW_TAG_member: fprintf(ofile, " fillcolor=lightblue"); break;
case DW_TAG_enumeration_type: fprintf(ofile, " fillcolor=magenta"); break;
case DW_TAG_array_type: fprintf(ofile, " fillcolor=gray80"); break;
case DW_TAG_pointer_type: fprintf(ofile, " fillcolor=gray90"); break;
case DW_TAG_base_type: fprintf(ofile, " fillcolor=yellow rank=min"); break;
case DW_TAG_enumerator: fprintf(ofile, " fillcolor=pink rank=min"); break;
case DW_TAG_subrange_type: fprintf(ofile, " fillcolor=gray80 rank=min"); break;
case DW_TAG_type_unit: fprintf(ofile, " fillcolor=darkred rank=min"); break;
}
done:
return status;
}
LTV *cif_find_base(LTV *type,int tag)
{
TYPE_INFO_LTV *type_info=NULL;
while (type && (type->flags<_TYPE)) {
type_info=(TYPE_INFO_LTV *) type;
if (type_info->tag==tag)
return type;
type=LT_get(type,TYPE_BASE,HEAD,KEEP);
}
return NULL;
}
LTV *cif_find_symbolic(LTV *type)
{
TYPE_INFO_LTV *type_info=NULL;
while (type && (type->flags<_TYPE)) {
type_info=(TYPE_INFO_LTV *) type;
if (type_info->flags&TYPEF_SYMBOLIC)
return type;
type=LT_get(type,TYPE_BASE,HEAD,KEEP);
}
return NULL;
}
LTV *cif_find_concrete(LTV *type)
{
TYPE_INFO_LTV *type_info=NULL;
while (type && (type->flags<_TYPE)) {
type_info=(TYPE_INFO_LTV *) type;
if (!(type_info->flags&TYPEF_SIGNATURE) || (type_info->flags&TYPEF_IS_DECL))
switch (type_info->tag) {
case DW_TAG_structure_type:
case DW_TAG_class_type:
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
case DW_TAG_array_type:
case DW_TAG_pointer_type:
case DW_TAG_base_type:
return type;
default:
break;
}
type=LT_get(type,TYPE_BASE,HEAD,KEEP);
}
return NULL;
}
LTV *cif_find_indexable(LTV *type)
{
TYPE_INFO_LTV *type_info=NULL;
while (type && (type->flags<_TYPE)) {
type_info=(TYPE_INFO_LTV *) type;
if (!(type_info->flags&TYPEF_SIGNATURE) || (type_info->flags&TYPEF_IS_DECL))
switch (type_info->tag) {
case DW_TAG_structure_type:
case DW_TAG_class_type:
case DW_TAG_union_type:
case DW_TAG_array_type:
case DW_TAG_pointer_type:
return type;
default:
break;
}
type=LT_get(type,TYPE_BASE,HEAD,KEEP);
}
return NULL;
}
LTV *cif_find_function(LTV *type)
{
TYPE_INFO_LTV *type_info=NULL;
while (type && (type->flags<_TYPE)) {
type_info=(TYPE_INFO_LTV *) type;
if (type_info->tag==DW_TAG_subprogram || type_info->tag==DW_TAG_subroutine_type)
return type;
type=LT_get(type,TYPE_BASE,HEAD,KEEP);
}
return NULL;
}
LTV *cif_get_child(LTV *type,char *childname)
{
if (type->flags<_TYPE) {
LTV *child=LT_get(type,childname,HEAD,KEEP);
if (child && child->flags<_TYPE)
return child;
}
return NULL;
}
LTV *cif_get_element(LTV *type,int index)
{
// see Type_findMemberByIndex
}
LTV *cif_create_cvar(LTV *type,void *data,char *member)
{
int status=0;
LTV *basic_type=NULL,*member_type=NULL,*cvar=NULL;
TYPE_INFO_LTV *type_info=(TYPE_INFO_LTV *) type->data;
basic_type=member?cif_find_indexable(type):cif_find_concrete(type);
int size=0;
int is_array=0;
if (!basic_type) {
switch(type_info->tag) {
case DW_TAG_subprogram:
case DW_TAG_subroutine_type:
size=sizeof(void *);
break;
default:
goto done;
}
} else {
TYPE_INFO_LTV *basic_type_info=(TYPE_INFO_LTV *) basic_type->data;
switch(basic_type_info->tag) {
case DW_TAG_structure_type:
case DW_TAG_class_type:
case DW_TAG_union_type:
if (member) {
if ((status=!(member_type=cif_get_child(basic_type,member))))
goto done; // fail w/o message
TYPE_INFO_LTV *member_type_info=(TYPE_INFO_LTV *) member_type->data;
cvar=cif_create_cvar(member_type,data+member_type_info->data_member_location,NULL);
goto done;
}
break;
case DW_TAG_array_type:
is_array=LT_ARR; // when arranging ffi args, use address of data (i.e. pointer to array location)
// fall thru
case DW_TAG_pointer_type:
if (member) {
errno=0;
char *end;
int index=strtol(member,&end,0);
if (errno || (end==member))
return NULL; // failed to find member, but we don't need to STRY/report it so just return right here
STRY(!(basic_type=cif_find_concrete(LT_get(basic_type,TYPE_BASE,HEAD,KEEP))),"dereference pointer type");
basic_type_info=(TYPE_INFO_LTV *) basic_type->data;
int offset=index*basic_type_info->bytesize;
if (!is_array) // data points to location of a pointer
data=*(void **) data;
// else data points to location of first element of array
cvar=cif_create_cvar(basic_type,data+offset,NULL);
goto done;
}
break;
default:
if ((status=member!=NULL))
goto done; // fail w/o message
break;
}
size=basic_type_info->bytesize;
}
if (data)
STRY(!(cvar=LTV_init(NEW(LTV),data,size,LT_BIN|LT_CVAR|is_array)),"create reference cvar");
else
STRY(!(cvar=LTV_init(NEW(LTV),(void *) mymalloc(size),size,LT_OWN|LT_BIN|LT_CVAR|is_array)),"create allocated cvar");
LT_put(cvar,TYPE_BASE,HEAD,type);
done:
return status?NULL:cvar;
}
LTV *cif_assign_cvar(LTV *dst,LTV *src)
{
int status=0;
LTV *type=NULL;
TYPE_UVALUE dst_uval={},src_uval={};
STRY(!Type_getUVAL(dst,&dst_uval),"test cvar dest compatibility");
if (Type_getUVAL(src,&src_uval))
Type_putUVAL(dst,&src_uval);
else
Type_putUVAL(dst,Type_pullUVAL(&dst_uval,src->data));
done:
return status?NULL:dst;
}
int cif_dump_cvar(FILE *ofile,LTV *cvar,int depth)
{
int status=0;
LTV *type;
TRY(!(type=LT_get(cvar,TYPE_BASE,HEAD,KEEP)),"validate cvar via type");
CATCH(status, 0, goto done, "not descendable");
CLL queue;
CLL_init(&queue);
LTV_enq(&queue,cif_create_cvar(type,cvar->data,NULL),TAIL); // copy cvar so we don't mess with it
int traverse_array(LTV *cvar,int count)
{
int status=0;
STRY(!(type=LT_get(cvar,TYPE_BASE,HEAD,KEEP)),"look up cvar type");
TYPE_INFO_LTV *type_info=(TYPE_INFO_LTV *) type->data;
for (int i=0;i<count;i++) {
cif_dump_cvar(ofile,cvar,depth+4);
cvar->data+=type_info->bytesize;
}
done:
return status;
}
int process_type_info(LTV *cvar) {
int status=0;
LTV *type=NULL;
void *type_info_op(CLL *lnk) {
LTV *ltv=((LTVR *) lnk)->ltv;
TYPE_INFO_LTV *type_info=(TYPE_INFO_LTV *) ltv;
switch (type_info->tag) {
case DW_TAG_member:
LTV_enq(&queue,cif_create_cvar(ltv,cvar->data+type_info->data_member_location,NULL),TAIL);
break;
default:
fprintf(ofile,CODE_RED "child tag %d unimplemented" CODE_RESET "\n",type_info->tag);
break;
}
done:
return status?(void *) NON_NULL:(void *) NULL;
};
STRY(!(type=LT_get(cvar,TYPE_BASE,HEAD,KEEP)),"look up cvar type");
TYPE_INFO_LTV *type_info=(TYPE_INFO_LTV *) type->data;
char *name=attr_get(type,TYPE_SYMB);
{
const char *str=NULL;
dwarf_get_TAG_name(type_info->tag,&str);
fprintf(ofile,"%*c%s \"%s\" ",depth*4,' ',str+7,name);
switch(type_info->tag) {
case DW_TAG_union_type:
case DW_TAG_structure_type:
case DW_TAG_class_type: {
LTI *children=NULL;
if ((children=LTI_resolve(type,TYPE_LIST,false)))
CLL_map(&children->ltvs,FWD,type_info_op);
break;
}
case DW_TAG_subprogram:
case DW_TAG_subroutine_type:
fprintf(ofile,"0x%x",cvar->data);
break;
case DW_TAG_pointer_type:
fprintf(ofile,"0x%x",*((void **) cvar->data));
break;
case DW_TAG_array_type: {
TYPE_INFO_LTV *base_info=NULL;
if (type_info->flags&TYPEF_BASE) // link to base type
STRY(!(base_info=(TYPE_INFO_LTV *) LT_get(&type_info->ltv,TYPE_BASE,HEAD,KEEP)),"look up base die for %s",type_info->id_str);
char *base_symb=base_info && (base_info->flags&TYPEF_SYMBOLIC)? attr_get(&base_info->ltv,TYPE_SYMB):NULL;
if (base_symb) {
LTV *subrange_ltv=LT_get(&type_info->ltv,"subrange type",HEAD,KEEP);
TYPE_INFO_LTV *subrange=subrange_ltv?(TYPE_INFO_LTV *) subrange_ltv->data:NULL;
if (subrange && (subrange->flags&TYPEF_UPPERBOUND)) {
fprintf(ofile,"\n");
LTV *tcvar=cif_create_cvar(&base_info->ltv,cvar->data,NULL);
traverse_array(tcvar,subrange->upper_bound+1);
LTV_release(tcvar);
}
else
fprintf(ofile,"(unbounded array of %s)",base_symb);
}
break;
}
case DW_TAG_enumeration_type:
fprintf(ofile,"(enum display unimplemented)");
break;
case DW_TAG_enumerator:
fprintf(ofile,"0x%x",type_info->const_value);
break;
case DW_TAG_member:
if (type_info->flags&TYPEF_BYTESIZE)
; /* fall thru! */
else {
LTV_enq(&queue,cif_create_cvar(cif_find_concrete(type),cvar->data,NULL),HEAD);
break;
}
case DW_TAG_base_type: {
TYPE_UVALUE uval={};
char buf[64];
if (Type_getUVAL(cvar,&uval))
fprintf(ofile,"%s (%p)",Type_pushUVAL(&uval,buf),cvar->data);
break;
}
default:
LTV_enq(&queue,cif_create_cvar(cif_find_concrete(type),cvar->data,NULL),HEAD);
break;
}
}
done:
fprintf(ofile,"\n");
return status;
};
while ((cvar=LTV_deq(&queue,HEAD))) {
process_type_info(cvar);
LTV_release(cvar);
}
done:
return status;
}
int cif_print_cvar(FILE *ofile,LTV *ltv,int depth) {
int status=0;
if (ltv->flags<_FFI)
fprintf(ofile,"FFI ");
if (ltv->flags<_CIF)
fprintf(ofile,"CIF ");
if (ltv->flags<_TYPE) // special case
print_type_info(ofile, ltv);
else
cif_dump_cvar(ofile,ltv,depth); // use reflection!!!!!
done:
fprintf(ofile,"\n");
return status;
}
int cif_dot_cvar(FILE *ofile,LTV *ltv) {
int status=0;
fprintf(ofile, "\"LTV%x\" [", ltv);
dot_type_info(ofile, ltv);
fprintf(ofile, "]\n");
done:
return status;
}
extern void graph_types_to_file(char *filename,LTV *ltv) {
FILE *ofile=fopen(filename,"w");
CLL ltvs;
CLL_init(<vs);
LTV_enq(<vs,ltv,HEAD);
fprintf(ofile,"digraph iftree\n{\ngraph [rankdir=LR, ratio=compress, concentrate=true] node [shape=record] edge []\n");
ltvs2dot_simple(ofile,<vs,0,filename);
//ltvs2dot(ofile,<vs,0,filename);
fprintf(ofile,"}\n");
LTV_deq(<vs,HEAD);
fclose(ofile);
}
int cif_die_offset(Dwarf_Die die,Dwarf_Off *offset,Dwarf_Error *error) {
int status=0;
Dwarf_Off cu_offset=0,die_offset=0;
STRY(dwarf_CU_dieoffset_given_die(die,&cu_offset,error),"get cu offset");
STRY(dwarf_die_CU_offset(die,&cu_offset,error),"get cu offset");
*offset=cu_offset+die_offset;
done:
return status;
}
#define IF_OK(cond,followup) if (cond==DW_DLV_OK) followup
int populate_type_info(Dwarf_Debug dbg,Dwarf_Die die,TYPE_INFO_LTV *type_info,CU_DATA *cu_data)
{
int status=0;
Dwarf_Error error=0;
char *diename = NULL;
STRY(!type_info || !cu_data,"validat params");
STRY(die==NULL,"test for null die");
STRY(dwarf_die_CU_offset(die,&type_info->offset,&error),"get CU-relative die offset");
Dwarf_Off goff;
STRY(dwarf_dieoffset(die,&goff,&error),"get global die offset");
DWARF_ID(type_info->id_str,goff);
STRY(dwarf_tag(die,&type_info->tag,&error),"get die tag");
if (dwarf_get_die_infotypes_flag(die))
type_info->flags|=TYPEF_IS_INFO;
switch (type_info->tag) {
case DW_TAG_type_unit:
case DW_TAG_compile_unit:
DWARF_ID(cu_data->offset_str,goff);
// FALL THRU!
case DW_TAG_pointer_type:
case DW_TAG_array_type:
case DW_TAG_volatile_type:
case DW_TAG_const_type:
case DW_TAG_restrict_type:
case DW_TAG_structure_type:
case DW_TAG_class_type:
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
case DW_TAG_base_type:
case DW_TAG_typedef:
case DW_TAG_subrange_type:
case DW_TAG_member:
case DW_TAG_enumerator:
case DW_TAG_formal_parameter:
case DW_TAG_unspecified_parameters: // varargs
case DW_TAG_rvalue_reference_type:
case DW_TAG_reference_type:
case DW_TAG_template_type_parameter:
case DW_TAG_template_value_parameter:
break;
case DW_TAG_variable:
case DW_TAG_subprogram:
case DW_TAG_subroutine_type:
if (0 && type_info->depth>1) {
type_info->tag=0;
goto done;
}
break;
default:
fprintf(stderr,CODE_RED "Unrecognized tag 0x%x\n" CODE_RESET,type_info->tag);
case DW_TAG_lexical_block:
case DW_AT_GNU_all_tail_call_sites:
case DW_TAG_label:
case DW_TAG_inlined_subroutine:
case DW_TAG_GNU_call_site:
case DW_TAG_GNU_call_site_parameter:
case DW_TAG_dwarf_procedure:
case DW_TAG_namespace:
case DW_TAG_inheritance:
case DW_TAG_imported_declaration:
case DW_TAG_imported_module:
case DW_TAG_ptr_to_member_type:
case DW_TAG_GNU_template_parameter_pack:
case DW_TAG_unspecified_type:
type_info->tag=0; // reject
goto done;
}
Dwarf_Signed atcnt=0;
Dwarf_Attribute *atlist=NULL;
TRY(dwarf_attrlist(die,&atlist,&atcnt,&error),"get die attrlist");
CATCH(status==DW_DLV_NO_ENTRY,0,goto done,"check for DW_DLV_NO_ENTRY in dwarf_attrlist");
SCATCH("get die attrlist");
Dwarf_Attribute *attr=NULL;
while (atcnt--) {
char *prefix;
attr=&atlist[atcnt];
Dwarf_Half vshort;
STRY(dwarf_whatattr(*attr,&vshort,&error),"get attr type");
Dwarf_Off voffset;
Dwarf_Sig8 vsig8;
char *vstr;
int dump_attr(FILE *ofile) {
int status=0;
fprintf(ofile,CODE_RED "dump attr 0x%x\n",vshort);
Dwarf_Signed vint;
Dwarf_Unsigned vuint;
Dwarf_Addr vaddr;
Dwarf_Off voffset;
Dwarf_Half vshort;
Dwarf_Bool vbool;
Dwarf_Ptr vptr;
Dwarf_Block *vblock;
Dwarf_Sig8 vsig8;
char *vstr;
const char *vcstr;
STRY(dwarf_whatform(*attr,&vshort,&error),"get attr form");
STRY(dwarf_get_FORM_name(vshort,&vcstr),"get attr formname");
fprintf(ofile,"form %d (%s) ",vshort,vcstr);
STRY(dwarf_whatform_direct(*attr,&vshort,&error),"get attr form_direct");
STRY(dwarf_get_FORM_name(vshort,&vcstr),"get attr form_direct name");
fprintf(ofile,"form_direct %d (%s) ",vshort,vcstr);
IF_OK(dwarf_formref(*attr,&voffset,&error), fprintf(ofile,"formref 0x%" DW_PR_DSx " ",voffset));
IF_OK(dwarf_global_formref(*attr,&voffset,&error),fprintf(ofile,"global_formref 0x%" DW_PR_DSx " ",voffset));
IF_OK(dwarf_formaddr(*attr,&vaddr,&error), fprintf(ofile,"addr 0x%" DW_PR_DUx " ",vaddr));
IF_OK(dwarf_formflag(*attr,&vbool,&error), fprintf(ofile,"flag %" DW_PR_DSd " ",vbool));
IF_OK(dwarf_formudata(*attr,&vuint,&error), fprintf(ofile,"udata %" DW_PR_DUu " ",vuint));
IF_OK(dwarf_formsdata(*attr,&vint,&error), fprintf(ofile,"sdata %" DW_PR_DSd " ",vint));
IF_OK(dwarf_formblock(*attr,&vblock,&error), fprintf(ofile,"block 0x%" DW_PR_DUx " ",vblock->bl_len));
IF_OK(dwarf_formstring(*attr,&vstr,&error), fprintf(ofile,"string %s ", vstr));
IF_OK(dwarf_formsig8(*attr,&vsig8,&error), fprintf(ofile,"addr %02d:%02d:%02d:%02d:%02d:%02d:%02d:%02d ",
vsig8.signature[0],vsig8.signature[1],vsig8.signature[2],vsig8.signature[3],
vsig8.signature[4],vsig8.signature[5],vsig8.signature[6],vsig8.signature[7]));
fprintf(ofile,"\n");
done:
return status;
};
switch (vshort) {
case DW_AT_name: // string
type_info->flags|=TYPEF_HAS_NAME;
break;
case DW_AT_type: // global_formref
//STRY(dwarf_whatform(*attr,&vshort,&error),"get attr form");
IF_OK(dwarf_global_formref(*attr,&type_info->base,&error),type_info->flags|=TYPEF_BASE);
DWARF_ID(type_info->base_str,type_info->base);
IF_OK(dwarf_formsig8(*attr,&type_info->sig8,&error),type_info->flags|=(TYPEF_BASE|TYPEF_SIGNATURE));
break;
case DW_AT_low_pc:
IF_OK(dwarf_formsdata(*attr,&type_info->low_pc,&error),type_info->flags|=TYPEF_LOWPC);
break;
case DW_AT_data_member_location: // sdata
IF_OK(dwarf_formsdata(*attr,&type_info->data_member_location,&error),type_info->flags|=TYPEF_MEMBERLOC);
break;
case DW_AT_const_value: // sdata
IF_OK(dwarf_formsdata(*attr,&type_info->const_value,&error),type_info->flags|=TYPEF_CONSTVAL);
break;
case DW_AT_location: // sdata
IF_OK(dwarf_formsdata(*attr,&type_info->location,&error),type_info->flags|=TYPEF_LOCATION);
break;
case DW_AT_byte_size:
IF_OK(dwarf_formudata(*attr,&type_info->bytesize,&error),type_info->flags|=TYPEF_BYTESIZE);
break;
case DW_AT_bit_offset:
IF_OK(dwarf_formudata(*attr,&type_info->bitoffset,&error),type_info->flags|=TYPEF_BITOFFSET);
break;
case DW_AT_bit_size:
IF_OK(dwarf_formudata(*attr,&type_info->bitsize,&error),type_info->flags|=TYPEF_BITSIZE);
break;
case DW_AT_external:
IF_OK(dwarf_formflag(*attr,&type_info->external,&error),type_info->flags|=TYPEF_EXTERNAL);
break;
case DW_AT_upper_bound:
IF_OK(dwarf_formudata(*attr,&type_info->upper_bound,&error),type_info->flags|=TYPEF_UPPERBOUND);
break;
case DW_AT_encoding: // DW_ATE_unsigned, etc.
IF_OK(dwarf_formudata(*attr,&type_info->encoding,&error),type_info->flags|=TYPEF_ENCODING);
break;
case DW_AT_GNU_vector: // "The main difference between a regular array and the vector variant is that vectors are passed by value to functions."
type_info->flags|=TYPEF_VECTOR; // an attribute of an array
break;
case DW_AT_signature:
//case DW_AT_GNU_odr_signature: // One Definition Rule
IF_OK(dwarf_formsig8(*attr,&type_info->sig8,&error),type_info->flags|=TYPEF_SIGNATURE);
IF_OK(dwarf_formudata(*attr,(Dwarf_Unsigned *) &type_info->sig8,&error),type_info->flags|=TYPEF_SIGNATURE);
if (!(type_info->flags&TYPEF_SIGNATURE)) {
printf("sig attr (%d) with wrong form\n",vshort);
dump_attr(stderr);
}
break;
case DW_AT_linkage_name: // C++ mangling
IF_OK(dwarf_formstring(*attr,&vstr,&error),type_info->flags|=TYPEF_LINKAGE);
attr_set(&type_info->ltv,TYPE_LINK,vstr);
break;
case DW_AT_declaration: // i.e. not a definition (BOOLEAN)
type_info->flags|=TYPEF_IS_DECL;
break;
case DW_AT_GNU_odr_signature: // One Definition Rule
case DW_AT_sibling:
case DW_AT_high_pc:
case DW_AT_decl_column:
case DW_AT_decl_line:
case DW_AT_decl_file:
case DW_AT_call_line:
case DW_AT_call_file:
case DW_AT_GNU_all_tail_call_sites:
case DW_AT_GNU_all_call_sites:
case DW_AT_stmt_list:
case DW_AT_comp_dir:
case DW_AT_static_link:
case DW_AT_artificial: // __line__, etc.
case DW_AT_frame_base: // stack?
case DW_AT_inline:
case DW_AT_prototyped: // signature?
case DW_AT_language:
case DW_AT_producer:
case DW_AT_abstract_origin: // associated with DW_TAG_inlined_subroutine
case DW_AT_GNU_tail_call:
case DW_AT_GNU_call_site_value:
case DW_AT_GNU_macros: //
case DW_AT_specification: // C++?
case DW_AT_object_pointer: // C++
case DW_AT_pure: // C++
case DW_AT_accessibility:
case DW_AT_ranges:
case DW_AT_explicit:
case DW_AT_alignment:
case DW_AT_identifier_case:
case DW_AT_deleted:
case DW_AT_defaulted:
case DW_AT_const_expr:
case DW_AT_noreturn:
case DW_AT_default_value:
case DW_AT_GNU_dwo_id: // GNU DebugFission (split dwarf)
break;
default:
dump_attr(stderr);
break;
}
int get_expr_loclist_data(Dwarf_Unsigned exprlen,Dwarf_Ptr exprloc) {
int status=0;
Dwarf_Locdesc *llbuf;
Dwarf_Signed listlen;
STRY(dwarf_loclist_from_expr(dbg,exprloc,exprlen,&llbuf,&listlen,&error),"get exprloc");
for (int j=0;j<llbuf->ld_cents;j++)
{
if (llbuf->ld_s[j].lr_atom >= DW_OP_breg0 && llbuf->ld_s[j].lr_atom <= DW_OP_breg31) ;
else if (llbuf->ld_s[j].lr_atom >= DW_OP_reg0 && llbuf->ld_s[j].lr_atom <= DW_OP_reg31) ;
else if (llbuf->ld_s[j].lr_atom >= DW_OP_lit0 && llbuf->ld_s[j].lr_atom <= DW_OP_lit31) ;
else
switch(llbuf->ld_s[j].lr_atom)
{
case DW_OP_addr:
type_info->addr=llbuf->ld_s[j].lr_number;
type_info->flags|=TYPEF_ADDR;
break;
case DW_OP_GNU_push_tls_address: // THREAD LOCAL STORAGE
type_info->tag=0; // disqualify TLS variables
break;
case DW_OP_consts: case DW_OP_const1s: case DW_OP_const2s: case DW_OP_const4s: case DW_OP_const8s: // (Dwarf_Signed) llbuf->ld_s[j].lr_number
case DW_OP_constu: case DW_OP_const1u: case DW_OP_const2u: case DW_OP_const4u: case DW_OP_const8u: // llbuf->ld_s[j].lr_number
case DW_OP_fbreg: // (Dwarf_Signed) llbuf->ld_s[j].lr_number
case DW_OP_bregx: // printf(stdout," bregx %" DW_PR_DUu " + (%" DW_PR_DSd ") ",llbuf->ld_s[j].lr_number,llbuf->ld_s[j].lr_number2);
case DW_OP_regx: // printf(stdout," regx %" DW_PR_DUu " + (%" DW_PR_DSd ") ",llbuf->ld_s[j].lr_number,llbuf->ld_s[j].lr_number2);
case DW_OP_pick:
case DW_OP_plus_uconst:
case DW_OP_piece:
case DW_OP_deref_size:
case DW_OP_xderef_size:
case DW_OP_GNU_uninit:
case DW_OP_GNU_encoded_addr:
case DW_OP_GNU_implicit_pointer:
case DW_OP_GNU_entry_value:
case DW_OP_call_frame_cfa:
case DW_OP_deref:
case DW_OP_skip:
case DW_OP_bra:
case DW_OP_plus:
case DW_OP_shl:
case DW_OP_or:
case DW_OP_and:
case DW_OP_xor:
case DW_OP_eq:
case DW_OP_ne:
case DW_OP_gt:
case DW_OP_lt:
case DW_OP_shra:
case DW_OP_mul:
case DW_OP_minus:
case DW_OP_stack_value: // 0x9f
case DW_OP_lit16: // 0x40
case DW_OP_GNU_parameter_ref: // unreferenced parameter
case DW_OP_GNU_addr_index: // GNU DebugFission
case DW_OP_GNU_const_index: // GNU DebugFission
// fprintf(stdout," Ingnored DW_OP 0x%x n 0x%x n2 0x%x offset 0x%x",llbuf->ld_s[j].lr_atom,llbuf->ld_s[j].lr_number,llbuf->ld_s[j].lr_number2,llbuf->ld_s[j].lr_offset);
break;
default:
fprintf(stderr," Unrecognized DW_OP 0x%x n 0x%x n2 0x%x offset 0x%x",llbuf->ld_s[j].lr_atom,llbuf->ld_s[j].lr_number,llbuf->ld_s[j].lr_number2,llbuf->ld_s[j].lr_offset);
fprintf(stderr,CODE_RED " lowpc %" DW_PR_DUx " hipc %" DW_PR_DUx " ld_section_offset %" DW_PR_DUx " ld_from_loclist %s ld_cents %d ",
llbuf->ld_lopc,llbuf->ld_hipc,llbuf->ld_section_offset,llbuf->ld_from_loclist?"debug_loc":"debug_info",llbuf->ld_cents);
fprintf(stderr,CODE_RESET "\n");
break;
}
}
dwarf_dealloc(dbg,llbuf->ld_s, DW_DLA_LOC_BLOCK);
dwarf_dealloc(dbg,llbuf, DW_DLA_LOCDESC);
done:
return status;
};
Dwarf_Unsigned vuint;