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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@1012 626c5289-ae23-0410-ae9c-e8d60b6d4f22
This commit is contained in:
Dave Beazley 2001-02-01 13:34:18 +00:00
commit 9f8c7a554a
14 changed files with 720 additions and 625 deletions
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149
Tools/WAD/Include/wad.h
View file

@ -33,7 +33,7 @@ extern "C" {
#define MAX_PATH 1024
#endif
/* --- Low level memory management --- */
/* --- Low level memory management functions --- */
extern int wad_memory_init();
extern void *wad_malloc(int nbytes);
@ -59,8 +59,9 @@ typedef struct WadSegment {
extern int wad_segment_read();
extern WadSegment *wad_segment_find(void *vaddr);
extern int wad_segment_valid(void *vaddr);
/* --- Object file handling --- */
/* --- Object files --- */
typedef struct WadObjectFile {
void *ptr; /* Pointer to data */
int len; /* Length of data */
@ -72,89 +73,101 @@ typedef struct WadObjectFile {
extern void wad_object_reset();
extern WadObjectFile *wad_object_load(const char *path);
/* --- Symbol table information --- */
typedef struct WadSymbol {
char *name; /* Symbol table name */
char *file; /* Source file (if any) */
int type; /* Symbol type */
int bind; /* Symbol bind */
unsigned long value; /* Symbol value */
} WadSymbol;
#define WS_LOCAL 1
#define WS_GLOBAL 2
extern char *wad_find_symbol(WadObjectFile *wo, void *ptr, unsigned base, WadSymbol *ws);
#define SYM_LOCAL 1
#define SYM_GLOBAL 2
/* Signal handling */
extern void wad_init();
extern void wad_signalhandler(int, siginfo_t *, void *);
extern void wad_signal_init();
extern void wad_signal_clear();
extern void wad_set_return(const char *name, long value);
extern void wad_set_return_value(long value);
extern void wad_set_return_func(void (*f)(void));
extern int wad_elf_check(WadObjectFile *wo);
extern void wad_elf_debug(WadObjectFile *wo);
typedef struct WadLocal {
char *name; /* Name of the local */
void *ptr; /* Pointer to data */
int size; /* Size of the data */
int type; /* Data type */
int loc; /* Location: register or stack */
int type; /* Argument type */
unsigned long position; /* Position on the stack */
int stack; /* location on the stack */
int reg; /* Register number */
int line; /* Line number where defined */
struct WadLocal *next;
} WadLocal;
/* Debugging information */
typedef struct WadDebug {
int found; /* Whether or not debugging information was found */
char srcfile[1024]; /* Source file */
char objfile[1024]; /* Object file */
int line_number; /* Line number */
int nargs; /* Number of function arguments */
WadLocal *args; /* Arguments */
WadLocal *lastarg;
} WadDebug;
#define PARM_REGISTER 1
#define PARM_STACK 2
extern int wad_search_stab(void *stab, int size, char *stabstr, WadSymbol *symbol, unsigned long offset, WadDebug *wd);
extern int wad_debug_info(WadObjectFile *wo, WadSymbol *wsym, unsigned long offset, WadDebug *wd);
/* Type codes for local variables */
#define TYPE_UNKNOWN 0
#define TYPE_INT32 1
#define TYPE_INT16 2
#define TYPE_INT8 3
#define TYPE_INT64 4
#define TYPE_UINT32 5
#define TYPE_UINT16 6
#define TYPE_UINT8 7
#define TYPE_UINT64 8
#define TYPE_FLOAT 9
#define TYPE_DOUBLE 10
#define TYPE_POINTER 11
/* Data structure containing information about each stack frame */
typedef struct WadFrame {
long frameno; /* Frame number */
long pc; /* Real PC */
long sp; /* Real SP */
long fp; /* Real FP */
char *psp; /* Pointer to where the actual stack data is stored */
int stack_size; /* Stack frame size */
char *symbol; /* Symbol name */
long sym_base; /* Symbol base address */
char *objfile; /* Object file */
char *srcfile; /* Source file */
int line_number; /* Source line */
int nargs; /* Number of arguments */
WadLocal *args; /* Function arguments */
WadLocal *lastarg; /* Last argument */
int nlocals; /* Number of locals */
long frameno; /* Frame number */
struct WadFrame *next; /* Next frame up the stack */
struct WadFrame *prev; /* Previous frame down the stack */
/* Stack context information */
long pc; /* Real PC */
long sp; /* Real SP */
long fp; /* Real FP */
char *stack; /* Pointer to where a copy of the stack frame is stored */
int stack_size; /* Stack frame size (fp-sp) */
/* Loading information. Contains information from /proc as well as a pointer to
the executable or shared library in which the PC is located */
WadSegment *segment; /* Memory segment corresponding to PC */
WadObjectFile *object; /* Object file corresponding to PC */
/* Symbol table information for PC */
char *sym_name; /* Symbol name */
char *sym_file; /* Source file (if any) */
unsigned long sym_base; /* Symbol base address */
unsigned long sym_size; /* Symbol size */
int sym_type; /* Symbol type */
int sym_bind; /* Symbol binding */
/* Location information */
char *loc_objfile; /* Object filename */
char *loc_srcfile; /* Source filename */
int loc_line; /* Source line */
/* Debugging information */
int debug_nargs; /* Number of arguments */
WadLocal *debug_args; /* Arguments */
WadLocal *debug_lastarg; /* Last argument */
int last; /* Last frame flag */
struct WadFrame *next; /* Next frame up the stack */
struct WadFrame *prev; /* Previous frame down the stack */
} WadFrame;
extern WadFrame *wad_stack_trace(unsigned long, unsigned long, unsigned long);
extern char *wad_strip_dir(char *);
extern void wad_default_callback(int signo, WadFrame *frame, char *ret);
extern void wad_set_callback(void (*h)(int, WadFrame *, char *));
extern char *wad_load_source(char *, int line);
extern void wad_release_source();
extern void wad_release_trace();
extern long wad_steal_arg(WadFrame *f, char *symbol, int argno, int *error);
extern long wad_steal_outarg(WadFrame *f, char *symbol, int argno, int *error);
extern void wad_stack_debug(WadFrame *f);
extern char *wad_strip_dir(char *);
extern void wad_default_callback(int signo, WadFrame *frame, char *ret);
extern void wad_set_callback(void (*h)(int, WadFrame *, char *));
extern char *wad_load_source(char *, int line);
extern void wad_release_source();
extern void wad_release_trace();
extern long wad_steal_arg(WadFrame *f, char *symbol, int argno, int *error);
extern long wad_steal_outarg(WadFrame *f, char *symbol, int argno, int *error);
extern char *wad_arg_string(WadFrame *f);
@ -166,6 +179,14 @@ typedef struct {
extern void wad_set_returns(WadReturnFunc *rf);
extern WadReturnFunc *wad_check_return(const char *name);
extern int wad_search_stab(void *stab, int size, char *stabstr, WadFrame *f);
extern void wad_find_object(WadFrame *f);
extern void wad_find_symbol(WadFrame *f);
extern void wad_find_debug(WadFrame *f);
extern void wad_build_vars(WadFrame *f);
extern char *wad_format_var(WadLocal *l);
/* --- Debugging Interface --- */
#define DEBUG_SEGMENT 0x1
@ -186,7 +207,17 @@ extern WadReturnFunc *wad_check_return(const char *name);
extern int wad_debug_mode;
extern int wad_heap_overflow;
#ifdef WAD_LINUX
#define WAD_LITTLE_ENDIAN
#endif
#ifdef WAD_SOLARIS
#define WAD_BIG_ENDIAN
#endif
#ifdef __cplusplus
}
#endif

22
Tools/WAD/Wad/Makefile
View file

@ -7,10 +7,10 @@
#######################################################################
# These are the files that make up the WAD core
WADSRCS = io.c memory.c return.c default.c stack.c stab.c elf.c object.c init.c segment.c signal.c
WADOBJS = io.o memory.o return.o default.o stack.o stab.o elf.o object.o signal.o segment.o init.o
WADSRCS = vars.c default.c io.c memory.c return.c stack.c stab.c elf.c object.c init.c segment.c signal.c
WADOBJS = vars.o default.o io.o memory.o return.o stack.o stab.o elf.o object.o signal.o segment.o init.o
INCLUDE = -I../Include -I. $(SINCLUDE)
WADOPT = -DWAD_SOLARIS
WADOPT = -DWAD_LINUX
# Location of your Python installation
PYINCLUDE = -I/usr/local/include/python2.0
@ -23,21 +23,21 @@ TCLSRCS = wadtcl.cxx
TCLOBJS = wadtcl.o
# Location of your Perl installation
PERLINCLUDE = -I/usr/perl5/5.00503/sun4-solaris/CORE
PERLINCLUDE = -I/usr/lib/perl5/5.00503/i386-linux/CORE
PERLSRCS = wadpl.cxx
PERLOBJS = wadpl.o
# C Compiler
CC = cc
CFLAGS = #
CC = gcc
CFLAGS = #-fpic
# C++ Compiler
CXX = CC
CXXFLAGS = #-Kpic
CXX = c++
CXXFLAGS = #-fpic
# Linking options
CLINK =
CXXLINK = CC -G
CXXLINK = g++ -shared
# Rules for creation of a .o file from .cxx
.SUFFIXES: .cxx
@ -67,7 +67,7 @@ wad_perl_handler.c:
python makehandler.py
debug::
cc -g debug.c $(INCLUDE) -L. -R. -lwad
cc -g debug.c $(INCLUDE) -L. -Xlinker -rpath . -lwad
plus::
CC -g debug.cxx $(INCLUDE) -L. -R. -lwad
@ -76,7 +76,7 @@ wc::
wc $(SRCS)
semi::
egrep ";" $(SRCS) wadpy.cxx | wc
egrep ";" $(WADSRCS) wadpy.cxx | wc
clean::

4
Tools/WAD/Wad/Makefile.in
View file

@ -6,8 +6,8 @@
#######################################################################
# These are the files that make up the WAD core
WADSRCS = io.c memory.c return.c default.c stack.c stab.c elf.c object.c init.c segment.c signal.c
WADOBJS = io.o memory.o return.o default.o stack.o stab.o elf.o object.o signal.o segment.o init.o
WADSRCS = vars.c io.c memory.c return.c default.c stack.c stab.c elf.c object.c init.c segment.c signal.c
WADOBJS = vars.o io.o memory.o return.o default.o stack.o stab.o elf.o object.o signal.o segment.o init.o
INCLUDE = -I../Include -I. $(SINCLUDE)
WADOPT = @WADOPT@

25
Tools/WAD/Wad/debug.c
View file

@ -3,9 +3,21 @@
#include "wad.h"
#include <assert.h>
int seg_crash(int n) {
typedef struct Foo {
double a;
double b;
float c;
} Foo;
static int type_crash(int n, short m, char c, double x, float y, Foo f, void *ptr) {
int *a = 0;
if (n > 0) seg_crash(n-1);
*a = 3;
return 1;
}
static int seg_crash(int n, double x,
float y) {
int *a = 0;
if (n > 0) seg_crash(n-1,x,y);
*a = 3;
return 1;
}
@ -61,23 +73,26 @@ static int test(int x, int (*f)(int)) {
int main(int argc, char **argv) {
int n;
int (*f)(int);
Foo foo = { 3.14, 28.18, 1.0 };
printf("starting.\n");
if (strcmp(argv[1],"abort") == 0) {
abort_crash(0);
} else if (strcmp(argv[1],"seg") ==0) {
seg_crash(0);
seg_crash(0,1,2);
} else if (strcmp(argv[1],"bus") == 0) {
bus_crash(0);
} else if (strcmp(argv[1],"ret") == 0) {
call_func(4,seg_crash);
call_func(4,abort_crash);
} else if (strcmp(argv[1],"test") == 0) {
test(-1000,seg_crash);
test(-1000,abort_crash);
} else if (strcmp(argv[1],"double") == 0) {
double_crash(3.14159,2.1828);
} else if (strcmp(argv[1],"math") == 0) {
math_crash(3,0);
} else if (strcmp(argv[1],"type") == 0) {
type_crash(34,42,17, 3.14159, 2.1828, foo, &foo);
}
multi(3,5,10,3.14);
}

105
Tools/WAD/Wad/default.c
View file

@ -26,15 +26,15 @@ char *wad_arg_string(WadFrame *frame) {
long *nextstack;
int i;
WadFrame *nf;
nf = frame->next;
if (nf)
nextstack = (long *) nf->psp;
nextstack = (long *) nf->stack;
else
nextstack = 0;
str[0] = 0;
stack = (long *) frame->psp;
stack = (long *) frame->stack;
#ifdef WAD_LINUX
if (!nf) {
@ -42,7 +42,7 @@ char *wad_arg_string(WadFrame *frame) {
}
#endif
if (frame->nargs < 0) {
if (frame->debug_nargs < 0) {
/* No argument information is available. If we are on SPARC, we'll dump
the %in registers since these usually hold input parameters. On
Linux, we do nothing */
@ -57,52 +57,16 @@ char *wad_arg_string(WadFrame *frame) {
#endif
} else {
/* We were able to get some argument information out the debugging table */
wp = frame->args;
for (i = 0; i < frame->nargs; i++, wp = wp->next) {
wp = frame->debug_args;
for (i = 0; i < frame->debug_nargs; i++, wp = wp->next) {
strcat(str,wp->name);
strcat(str,"=");
/* Try to figure out where the value is */
if ((wp->loc == PARM_STACK) && nf) {
/* Parameter is located on the call stack */
unsigned long argloc = wp->position; /* Location relative to frame pointer */
if ((argloc & 0x3) == 0) {
if (argloc >= 0) {
/* Is word aligned, make some kind of attempt to print this out */
unsigned long *p = (unsigned long *) (((char *) nextstack) + argloc);
sprintf(temp,"0x%x", *p);
strcat(str,temp);
} else {
unsigned long *p = (unsigned long *) (((char *) stack) + frame->stack_size + argloc);
sprintf(temp,"0x%x", *p);
strcat(str,temp);
}
}
} else if (wp->loc == PARM_REGISTER) {
#ifdef WAD_SOLARIS
if ((wp->position >= 24) && (wp->position < 32)) {
/* Value is located in the %in registers */
sprintf(temp,"0x%x", stack[wp->position - 16]);
strcat(str,temp);
} else if ((wp->position >= 8) && (wp->position < 16)) {
/* Value is located in the %on registers */
/* sprintf(temp,"0x%x", frame->regs[wp->value]);
strcat(str,temp); */
} else if ((wp->position >= 16) && (wp->position < 24)) {
/* Value has been placed in the %ln registers */
/*
sprintf(temp,"0x%x", frame->regs[wp->value - 16]);
strcat(str,temp); */
}
#endif
#ifdef WAD_LINUX
strcat(str,"?");
#endif
}
if (i < (frame->nargs-1)) strcat(str,",");
strcat(str,wad_format_var(wp));
if (i < (frame->debug_nargs-1)) strcat(str,",");
}
}
return str;
}
char *wad_strip_dir(char *name) {
@ -168,54 +132,45 @@ void wad_release_source() {
* Default callback
* ----------------------------------------------------------------------------- */
void wad_default_callback(int signo, WadFrame *framedata, char *ret) {
void wad_default_callback(int signo, WadFrame *f, char *ret) {
char *fd;
WadFrame *f;
WadFrame *fline = 0;
switch(signo) {
case SIGSEGV:
fprintf(stderr,"Segmentation fault.\n");
fprintf(stderr,"WAD: Segmentation fault.\n");
break;
case SIGBUS:
fprintf(stderr,"Bus error.\n");
fprintf(stderr,"WAD: Bus error.\n");
break;
case SIGABRT:
fprintf(stderr,"Abort.\n");
fprintf(stderr,"WAD: Abort.\n");
break;
case SIGFPE:
fprintf(stderr,"Floating point exception.\n");
fprintf(stderr,"WAD: Floating point exception.\n");
break;
case SIGILL:
fprintf(stderr,"Illegal instruction.\n");
fprintf(stderr,"WAD: Illegal instruction.\n");
break;
default:
fprintf(stderr,"Signal %d\n", signo);
fprintf(stderr,"WAD: Signal %d\n", signo);
break;
}
fd = (char *) framedata;
f = (WadFrame *) fd;
/* Find the last exception frame */
while (f && !f->last) {
while (f && !(f->last)) {
f = f->next;
}
/* Now work backwards */
if (f) {
f = f->prev;
}
while (f) {
fprintf(stderr,"#%-3d 0x%08x in %s(%s)", f->frameno, f->pc, f->symbol ? f->symbol : "?",
fprintf(stderr,"#%-3d 0x%08x in %s(%s)", f->frameno, f->pc, f->sym_name ? f->sym_name : "?",
wad_arg_string(f));
if (f->srcfile && strlen(f->srcfile)) {
fprintf(stderr," in '%s'", wad_strip_dir(f->srcfile));
if (f->line_number > 0) {
fprintf(stderr,", line %d", f->line_number);
if (f->loc_srcfile && strlen(f->loc_srcfile)) {
fprintf(stderr," in '%s'", wad_strip_dir(f->loc_srcfile));
if (f->loc_line > 0) {
fprintf(stderr,", line %d", f->loc_line);
{
int fd;
fd = open(f->srcfile, O_RDONLY);
fd = open(f->loc_srcfile, O_RDONLY);
if (fd > 0) {
fline = f;
}
@ -223,8 +178,8 @@ void wad_default_callback(int signo, WadFrame *framedata, char *ret) {
}
}
} else {
if (f->objfile && strlen(f->objfile)) {
fprintf(stderr," from '%s'", f->objfile);
if (f->loc_objfile && strlen(f->loc_objfile)) {
fprintf(stderr," from '%s'", f->loc_objfile);
}
}
fprintf(stderr,"\n");
@ -236,15 +191,15 @@ void wad_default_callback(int signo, WadFrame *framedata, char *ret) {
int last;
char *line, *c;
int i;
first = fline->line_number - 2;
last = fline->line_number + 2;
first = fline->loc_line - 2;
last = fline->loc_line + 2;
if (first < 1) first = 1;
line = wad_load_source(fline->srcfile,first);
line = wad_load_source(fline->loc_srcfile,first);
if (line) {
fprintf(stderr,"\n%s, line %d\n\n", fline->srcfile,fline->line_number);
fprintf(stderr,"\n%s, line %d\n\n", fline->loc_srcfile,fline->loc_line);
for (i = first; i <= last; i++) {
if (i == fline->line_number) fprintf(stderr," => ");
if (i == fline->loc_line) fprintf(stderr," => ");
else fprintf(stderr," ");
c = strchr(line,'\n');
if (c) {

193
Tools/WAD/Wad/elf.c
View file

@ -19,7 +19,6 @@
#include <elf.h>
#endif
/* --- What's needed here (high level interface) :
- Mapping of addresses to symbols
@ -207,30 +206,30 @@ wad_elf_section_byname(WadObjectFile *wo, char *name) {
* base address of the object file.
* ----------------------------------------------------------------------------- */
char *
wad_elf_find_symbol(WadObjectFile *wo, void *ptr, unsigned long base, WadSymbol *ws) {
int nsymtab;
int nstrtab;
int symtab_size;
static
int elf_search_section_sym(WadFrame *f, char *secname, char *strname) {
int nsymtab;
int nstrtab;
int symtab_size;
Elf32_Sym *sym;
int nsym;
char *str;
int i;
unsigned long vaddr;
char *name;
char *localfile = 0;
int i;
unsigned long vaddr, base;
char *name;
char *localfile = 0;
vaddr = (unsigned long) ptr;
vaddr = (unsigned long) f->pc;
base = (unsigned long) f->segment->base;
nsymtab = wad_elf_section_byname(wo,".symtab");
if (nsymtab < 0) goto dynsym;
nstrtab = wad_elf_section_byname(wo,".strtab");
if (nstrtab < 0) goto dynsym;
nsymtab = wad_elf_section_byname(f->object,secname);
if (nsymtab < 0) return 0;
nstrtab = wad_elf_section_byname(f->object,strname);
if (nstrtab < 0) return 0;
symtab_size = wad_elf_section_size(wo,nsymtab);
sym = (Elf32_Sym *) wad_elf_section_data(wo,nsymtab);
str = (char *) wad_elf_section_data(wo,nstrtab);
symtab_size = wad_elf_section_size(f->object,nsymtab);
sym = (Elf32_Sym *) wad_elf_section_data(f->object,nsymtab);
str = (char *) wad_elf_section_data(f->object,nstrtab);
nsym = (symtab_size/sizeof(Elf32_Sym));
for (i = 0; i < nsym; i++) {
@ -242,66 +241,36 @@ wad_elf_find_symbol(WadObjectFile *wo, void *ptr, unsigned long base, WadSymbol
if (wad_debug_mode & DEBUG_SYMBOL_SEARCH) {
wad_printf("%x(%x): %s %x + %x, %x, %x\n", base, vaddr, name, sym[i].st_value, sym[i].st_size, sym[i].st_info, sym[i].st_shndx);
}
if (((base + sym[i].st_value) <= vaddr) && (vaddr <= (base+sym[i].st_value + sym[i].st_size))) {
#ifdef WAD_LINUX
/* If the section index is 0, the symbol is undefined */
if (sym[i].st_shndx == 0) continue;
#endif
ws->value = sym[i].st_value;
f->sym_name = name;
f->sym_base = base + sym[i].st_value;
f->sym_size = sym[i].st_size;
if (ELF32_ST_BIND(sym[i].st_info) == STB_LOCAL) {
ws->file = localfile;
ws->bind = WS_LOCAL;
f->sym_file = localfile;
f->sym_bind = SYM_LOCAL;
} else {
ws->bind = WS_GLOBAL;
f->sym_bind = SYM_GLOBAL;
}
ws->name = name;
return name;
}
}
dynsym:
/* If we didn't find it in the .symtab section. Maybe it's in the .dynsym, .dynstr section */
nsymtab = wad_elf_section_byname(wo,".dynsym");
if (nsymtab < 0) return 0;
nstrtab = wad_elf_section_byname(wo,".dynstr");
if (nstrtab < 0) return 0;
symtab_size = wad_elf_section_size(wo,nsymtab);
sym = (Elf32_Sym *) wad_elf_section_data(wo,nsymtab);
str = (char *) wad_elf_section_data(wo,nstrtab);
nsym = (symtab_size/sizeof(Elf32_Sym));
localfile = 0;
for (i = 0; i < nsym; i++) {
name = str + sym[i].st_name;
if (ELF32_ST_TYPE(sym[i].st_info) == STT_FILE) {
localfile = name;
}
if (wad_debug_mode & DEBUG_SYMBOL_SEARCH) {
wad_printf("%x(%x): %s %x + %x, %x, %x\n", base, vaddr, name, sym[i].st_value, sym[i].st_size, sym[i].st_info, sym[i].st_shndx);
}
if (((base + sym[i].st_value) <= vaddr) && (vaddr <= (base+sym[i].st_value + sym[i].st_size))) {
#ifdef WAD_LINUX
/* If the section index is 0, the symbol is undefined */
if (sym[i].st_shndx == 0) continue;
#endif
ws->value = sym[i].st_value;
if (ELF32_ST_BIND(sym[i].st_info) == STB_LOCAL) {
ws->file = localfile;
ws->bind = WS_LOCAL;
} else {
ws->bind = WS_GLOBAL;
}
ws->name = name;
return name;
return 1;
}
}
return 0;
}
void
wad_elf_find_symbol(WadFrame *f) {
/* We simply try a few possible sections */
if (elf_search_section_sym(f,".symtab",".strtab")) return;
if (elf_search_section_sym(f,".dynsym",".dynstr")) return;
/* Hmmm. No match found. Oh well */
return;
}
/* -----------------------------------------------------------------------------
* wad_elf_debug_info()
*
@ -309,19 +278,19 @@ wad_elf_find_symbol(WadObjectFile *wo, void *ptr, unsigned long base, WadSymbol
* ----------------------------------------------------------------------------- */
int
wad_elf_debug_info(WadObjectFile *wo, WadSymbol *wsym, unsigned long offset, WadDebug *wd) {
wad_elf_debug_info(WadFrame *f) {
int nstab, nstabstr, nstabindex, nstabindexstr, nstabexcl, nstabexclstr;
int ret;
void *stab;
char *stabstr;
int stabsize;
nstab = wad_elf_section_byname(wo,".stab");
nstabstr = wad_elf_section_byname(wo,".stabstr");
nstabindex = wad_elf_section_byname(wo,".stab.index");
nstabindexstr = wad_elf_section_byname(wo,".stab.indexstr");
nstabexcl = wad_elf_section_byname(wo,".stab.excl");
nstabexclstr = wad_elf_section_byname(wo,".stab.exclstr");
nstab = wad_elf_section_byname(f->object,".stab");
nstabstr = wad_elf_section_byname(f->object,".stabstr");
nstabindex = wad_elf_section_byname(f->object,".stab.index");
nstabindexstr = wad_elf_section_byname(f->object,".stab.indexstr");
nstabexcl = wad_elf_section_byname(f->object,".stab.excl");
nstabexclstr = wad_elf_section_byname(f->object,".stab.exclstr");
#ifdef DEBUG_DEBUG
wad_printf("nstab = %d\n", nstab);
@ -336,39 +305,43 @@ wad_elf_debug_info(WadObjectFile *wo, WadSymbol *wsym, unsigned long offset, Wad
/* Look in the .stab section */
if (nstab > 0) {
stab = wad_elf_section_data(wo,nstab);
stabsize = wad_elf_section_size(wo,nstab);
stabstr = (char *) wad_elf_section_data(wo,nstabstr);
stab = wad_elf_section_data(f->object,nstab);
stabsize = wad_elf_section_size(f->object,nstab);
stabstr = (char *) wad_elf_section_data(f->object,nstabstr);
if (wad_search_stab(stab,stabsize,stabstr, wsym, offset,wd)) return 1;
if (wad_search_stab(stab,stabsize,stabstr, f)) return 1;
}
/* Look in the .stab.excl section. A solaris oddity? */
if (nstabexcl > 0) {
stab = wad_elf_section_data(wo,nstabexcl);
stabsize = wad_elf_section_size(wo, nstabexcl);
stabstr = (char *) wad_elf_section_data(wo, nstabexclstr);
if (wad_search_stab(stab,stabsize,stabstr, wsym, offset,wd)) return 1;
stab = wad_elf_section_data(f->object,nstabexcl);
stabsize = wad_elf_section_size(f->object, nstabexcl);
stabstr = (char *) wad_elf_section_data(f->object, nstabexclstr);
if (wad_search_stab(stab,stabsize,stabstr, f)) return 1;
}
/* Look in the .stab.index section. A Solaris oddity? */
if (nstabindex > 0) {
stab = wad_elf_section_data(wo,nstabindex);
stabsize = wad_elf_section_size(wo, nstabindex);
stabstr = (char *) wad_elf_section_data(wo, nstabindexstr);
if (wad_search_stab(stab,stabsize,stabstr, wsym, offset, wd)) {
WadObjectFile *wo1;
stab = wad_elf_section_data(f->object,nstabindex);
stabsize = wad_elf_section_size(f->object, nstabindex);
stabstr = (char *) wad_elf_section_data(f->object, nstabindexstr);
if (wad_search_stab(stab,stabsize,stabstr, f)) {
WadObjectFile *wo1, *wold;
/* Hmmm. Might be in a different file */
char objfile[MAX_PATH];
strcpy(objfile, wd->objfile);
strcpy(objfile, f->loc_objfile);
wo1 = wad_object_load(objfile);
if (wo1) {
ret = wad_debug_info(wo1,wsym,offset,wd);
wold = f->object;
f->object = wo1;
wad_find_debug(f);
f->object = wold;
return ret;
} else {
/* wad_printf("couldn't load %s\n", objfile); */
}
if (!ret) return wad_search_stab(stab,stabsize,stabstr,wsym, offset,wd);
/* if (!ret) return wad_search_stab(stab,stabsize,stabstr,f);*/
return ret;
}
}
@ -402,36 +375,32 @@ wad_elf_debug(WadObjectFile *wo) {
/* -----------------------------------------------------------------------------
* wad_find_symbol()
* ----------------------------------------------------------------------------- */
char *
wad_find_symbol(WadObjectFile *wo, void *ptr, unsigned base, WadSymbol *ws) {
char *r;
ws->name = 0;
ws->file = 0;
ws->type = 0;
ws->bind = 0;
ws->value = 0;
void
wad_find_symbol(WadFrame *f) {
if (wad_debug_mode & DEBUG_SYMBOL) {
wad_printf("wad: Searching for 0x%08x --> ", ptr);
wad_printf("wad: Searching for 0x%08x --> ", f->pc);
}
r = wad_elf_find_symbol(wo,ptr,base,ws);
if (r) {
if (wad_debug_mode & DEBUG_SYMBOL) {
wad_printf("%s", ws->name);
if (ws->file)
wad_printf(" in '%s'\n", ws->file);
if (f->object)
wad_elf_find_symbol(f);
if (wad_debug_mode & DEBUG_SYMBOL) {
if (f->sym_name) {
wad_printf("%s", f->sym_name);
if (f->sym_file)
wad_printf(" in '%s'\n", f->sym_file);
else
wad_printf("\n");
}
} else {
if (wad_debug_mode & DEBUG_SYMBOL) {
} else {
wad_printf("?\n");
}
}
return r;
}
int
wad_debug_info(WadObjectFile *wo, WadSymbol *wsym, unsigned long offset, WadDebug *wd) {
return wad_elf_debug_info(wo,wsym, offset,wd);
void
wad_find_debug(WadFrame *f) {
if (f->object)
wad_elf_debug_info(f);
}

11
Tools/WAD/Wad/object.c
View file

@ -246,3 +246,14 @@ wad_arobject_load(const char *arpath, const char *robjname) {
return 0;
}
/* -----------------------------------------------------------------------------
* wad_find_object(WadFrame *f)
*
* Given a stack frame. Try to locate the object file
* ----------------------------------------------------------------------------- */
void wad_find_object(WadFrame *f) {
if (f->segment) {
f->object = wad_object_load(f->segment->mappath);
}
}

1
Tools/WAD/Wad/return.c
View file

@ -38,6 +38,7 @@ void wad_set_returns(WadReturnFunc *rf) {
WadReturnFunc *wad_check_return(const char *name) {
int i;
if (!name) return 0;
for (i = 0; i < num_return; i++) {
if (strcmp(name,return_points[i].name) == 0) {
if (wad_debug_mode & DEBUG_RETURN) {

11
Tools/WAD/Wad/segment.c
View file

@ -99,7 +99,16 @@ wad_segment_find(void *vaddr) {
return 0;
}
/* -----------------------------------------------------------------------------
* wad_segment_valid()
*
* Checks to see if a memory address is valid or not based on data in the
* segment map
* ----------------------------------------------------------------------------- */
int wad_segment_valid(void *vaddr) {
return wad_segment_find ? 1 : 0;
}

84
Tools/WAD/Wad/signal.c
View file

@ -180,7 +180,6 @@ static void nonlocalret() {
void wad_restore_i386_registers(WadFrame *f, int nlevels) {
WadFrame *lastf = f;
char *fd = (char *) f;
int localsize = 0;
unsigned char *pc;
unsigned long *saved;
@ -226,8 +225,7 @@ void wad_restore_i386_registers(WadFrame *f, int nlevels) {
else break;
}
}
fd += f->size;
f = (WadFrame *) fd;
f = f->next;
}
}
@ -260,6 +258,12 @@ void wad_signalhandler(int sig, siginfo_t *si, void *vcontext) {
wad_nlr_func = 0;
context = (ucontext_t *) vcontext;
/* Read the segments */
if (wad_segment_read() < 0) {
wad_printf("WAD: Unable to read segment map\n");
return;
}
if (wad_debug_mode & DEBUG_SIGNAL) {
printf("WAD: siginfo = %x, context = %x\n", si, vcontext);
@ -302,6 +306,9 @@ void wad_signalhandler(int sig, siginfo_t *si, void *vcontext) {
#ifdef WAD_LINUX
p_fp = (unsigned long) (*fp);
/* printf("fault at address %x, pc = %x, sp = %x, fp = %x\n", addr, p_pc, p_sp, p_fp); */
#endif
#ifdef WAD_SOLARIS
p_fp = (unsigned long) *(((long *) p_sp) + 14);
#endif
/* printf("fault at address %x, pc = %x, sp = %x, fp = %x\n", addr, p_pc, p_sp, p_fp);*/
@ -316,62 +323,50 @@ void wad_signalhandler(int sig, siginfo_t *si, void *vcontext) {
}
wad_stacked_signal++;
frame = wad_stack_trace(p_pc, p_sp, p_fp);
origframe =frame;
if (!frame) {
/* We're really hosed here */
wad_stacked_signal--;
/* We're really hosed. Not possible to generate a stack trace */
printf("WAD: Unable to generate stack trace.\n");
printf("WAD: Maybe the call stack has been corrupted by buffer overflow.\n");
wad_signal_clear();
return;
/* exit(1); */
}
{
WadFrame *f = frame;
while (f) {
wad_find_object(f);
wad_find_symbol(f);
wad_find_debug(f);
wad_build_vars(f);
f = f->next;
}
}
wad_heap_overflow = 0;
if (sig == SIGSEGV) {
if (addr >= current_brk) wad_heap_overflow = 1;
}
if (wad_debug_mode & DEBUG_STACK) {
/* Walk the exception frames and try to find a return point */
while (frame) {
int i;
WadLocal *p;
/* Print out detailed stack trace information */
printf("::: Stack frame - 0x%08x :::\n", frame);
printf(" sp = %x\n", frame->sp);
printf(" fp = %x\n", frame->fp);
printf(" size = %x\n", frame->stack_size);
printf(" pc = %x (base = %x)\n", frame->pc, frame->sym_base);
printf(" symbol = '%s'\n", frame->symbol ? frame->symbol : "?");
printf(" srcfile = '%s'\n", frame->srcfile ? frame->srcfile : "");
printf(" objfile = '%s'\n", frame->objfile ? frame->objfile : "");
printf(" numargs = %d\n", frame->nargs);
printf(" arguments [\n");
p = frame->args;
i = 0;
while (p) {
printf(" arg[%d] : name = '%s', loc = %d, type = %d, value = %d\n", i, p->name, p->loc, p->type, p->position);
p = p->next;
i++;
}
printf(" ]\n");
frame = frame->next;
}
frame = origframe;
}
wad_stack_debug(frame);
/* Walk the exception frames and try to find a return point */
origframe = frame;
while (frame) {
WadReturnFunc *wr = wad_check_return(frame->symbol);
WadReturnFunc *wr = wad_check_return(frame->sym_name);
if (wr) {
found = 1;
wad_nlr_value = wr->value;
retname = wr->name;
}
frame = frame->next;
if (found) {
frame->last = 1; /* Cut off top of the stack trace */
break;
}
frame = frame->next;
nlevels++;
}
if (found) {
wad_nlr_levels = nlevels - 1;
@ -382,12 +377,13 @@ void wad_signalhandler(int sig, siginfo_t *si, void *vcontext) {
wad_nlr_levels = 0;
}
if (sig_callback) {
(*sig_callback)(sig,origframe,retname);
} else {
/* No signal handler defined. Go invoke the default */
wad_default_callback(sig, origframe,retname);
wad_release_trace();
}
if (wad_debug_mode & DEBUG_HOLD) while(1);
@ -464,4 +460,14 @@ void wad_signal_init() {
printf("WAD: Couldn't install signal handler!\n");
}
/* -----------------------------------------------------------------------------
* clear signals
* ----------------------------------------------------------------------------- */
void wad_signal_clear() {
signal(SIGSEGV, SIG_DFL);
signal(SIGBUS, SIG_DFL);
signal(SIGILL, SIG_DFL);
signal(SIGFPE, SIG_DFL);
signal(SIGABRT, SIG_DFL);
}

230
Tools/WAD/Wad/stab.c
View file

@ -55,8 +55,95 @@ match_stab_symbol(char *symbol, char *stabtext, int slen) {
* ----------------------------------------------------------------------------- */
static void
scan_function(Stab *s, int ns, WadDebug *debug) {
scan_function(Stab *s, char *stabstr, int ns, WadFrame *f) {
int i;
unsigned long offset;
offset = f->pc - f->sym_base;
for (i = 0; i < ns; i++,s++) {
if (wad_debug_mode & DEBUG_STABS) {
wad_printf(" %10d %10x %10d %10d %10d: '%s'\n", s->n_strx, s->n_type, s->n_other, s->n_desc, s->n_value,
stabstr+s->n_strx);
}
if ((s->n_type == N_UNDF) || (s->n_type == N_SO) || (s->n_type == N_FUN) ||
(s->n_type == N_OBJ)) return;
if (s->n_type == N_SLINE) {
if (s->n_value < offset) {
f->loc_line = s->n_desc;
}
} else if ((s->n_type == N_PSYM) || (s->n_type == N_RSYM)) {
/* Parameter counting */
char *pname;
char *c;
int len;
WadLocal *arg;
pname = stabstr+s->n_strx;
c = strchr(pname,':');
if (c) {
len = (c-pname);
} else {
len = strlen(pname);
}
/* Check if the argument was already used */
/* In this case, the first stab simply identifies an argument. The second
one identifies its location for the debugger */
if (f->debug_args) {
/* Need to do some fix up for linux here */
WadLocal *a = f->debug_args;
while (a) {
if ((strncmp(a->name,pname,len) == 0) && (strlen(a->name) == len)) {
/* We already saw this argument. Given a choice between a register and a stack
argument. We will choose the stack version */
if (a->loc == PARM_STACK) {
break;
}
/* Go ahead and use the new argument */
if (s->n_type == N_RSYM) {
a->loc = PARM_REGISTER;
a->reg = s->n_value;
} else {
a->loc = PARM_STACK;
a->stack = s->n_value;
}
break;
}
a = a->next;
}
if (a) continue; /* We got an argument match. Just skip to the next stab */
}
arg = (WadLocal *) wad_malloc(sizeof(WadLocal));
arg->name = (char *) wad_malloc(len+1);
strncpy(arg->name, pname, len);
arg->name[len] = 0;
if (s->n_type == N_RSYM) {
arg->loc = PARM_REGISTER;
arg->reg = s->n_value;
arg->stack = 0;
} else {
arg->loc = PARM_STACK;
arg->line = s->n_desc;
arg->stack = s->n_value;
}
arg->type = 0;
arg->next = 0;
if (f->debug_args) {
f->debug_lastarg->next = arg;
f->debug_lastarg = arg;
} else {
f->debug_args = arg;
f->debug_lastarg = arg;
f->debug_nargs= 0;
}
f->debug_nargs++;
}
}
}
/* Given a stabs data segment (obtained somehow), this function tries to
@ -74,43 +161,44 @@ scan_function(Stab *s, int ns, WadDebug *debug) {
*/
int
wad_search_stab(void *sp, int size, char *stabstr, WadSymbol *wsym, unsigned long offset, WadDebug *debug) {
wad_search_stab(void *sp, int size, char *stabstr, WadFrame *f) {
Stab *s;
int ns;
int infunc;
int slen;
int i;
int found = 0;
char *file, *lastfile = 0;
int chk = 0;
WadLocal *arg;
char srcfile[MAX_PATH];
char objfile[MAX_PATH];
if (!f->sym_name) return 0;
s = (Stab *) sp; /* Stabs data */
ns = size/sizeof(Stab); /* number of stabs */
slen = strlen(wsym->name);
/* Reset the debug information section */
debug->found = 0;
debug->srcfile[0] = 0;
debug->objfile[0] = 0;
debug->line_number = -1;
debug->nargs = 0;
debug->args = 0;
debug->lastarg = 0;
slen = strlen(f->sym_name);
srcfile[0] = 0;
objfile[0] = 0;
for (i = 0; i < ns; i++, s++) {
/*
if (wad_debug_mode & DEBUG_STABS) {
wad_printf(" %10d %10x %10d %10d %10d: '%s'\n", s->n_strx, s->n_type, s->n_other, s->n_desc, s->n_value,
stabstr+s->n_strx);
}
*/
if ((s->n_type == N_UNDF)) { /* && (s->n_desc >= 0)) { */
/* New stabs section. We need to be a little careful here. Do a recursive
search of the subsection. */
if (wad_search_stab(s+1,s->n_desc*sizeof(Stab), stabstr, wsym, offset,debug)) return 1;
if (wad_search_stab(s+1,s->n_desc*sizeof(Stab), stabstr, f)) return 1;
/* On solaris, each stabs section seem to increment the stab string pointer. On Linux,
/* On solaris, each stabs section seems to increment the stab string pointer. On Linux,
the linker seems to do a certain amount of optimization that results in a single
string table. */
@ -119,112 +207,48 @@ wad_search_stab(void *sp, int size, char *stabstr, WadSymbol *wsym, unsigned lon
#endif
i += s->n_desc;
s += s->n_desc;
debug->objfile[0] = 0;
debug->srcfile[0] = 0;
debug->line_number = -1;
debug->found = 0;
objfile[0] = 0;
srcfile[0] = 0;
continue;
} else if (s->n_type == N_SO) {
if (debug->found) return 1; /* New file and we already found what we wanted */
/* Source file specification */
/* Look for directory */
file = stabstr+s->n_strx;
if (strlen(file) && (file[strlen(file)-1] == '/')) {
strcpy(debug->srcfile,file);
strcpy(srcfile,file);
} else {
strcat(debug->srcfile,file);
strcat(srcfile,file);
}
debug->objfile[0] = 0;
objfile[0] = 0;
/* If we have a file match, we might be looking for a local symbol. If so,
we'll go ahead and set the srcfile field of the frame */
/* We're going to check for a file match. Maybe we're looking for a local symbol */
if (wsym->file && strcmp(wsym->file,file) == 0) {
debug->found = 1;
if (f->sym_file && strcmp(f->sym_file,file) == 0) {
found = 1;
}
lastfile = file;
} else if (s->n_type == N_OBJ) {
/* Object file specifier */
if (debug->objfile[0]) {
strcat(debug->objfile,"/");
if (objfile[0]) {
strcat(objfile,"/");
}
strcat(debug->objfile,stabstr+s->n_strx);
strcat(objfile,stabstr+s->n_strx);
} else if (s->n_type == N_FUN) {
if (match_stab_symbol(wsym->name, stabstr+s->n_strx, slen)) {
if (!wsym->file || (strcmp(wsym->file,lastfile) == 0)) {
infunc = 1;
debug->found = 1;
debug->nargs = 0;
} else {
infunc = 0;
if (match_stab_symbol(f->sym_name, stabstr+s->n_strx, slen)) {
if (!f->sym_file || (strcmp(f->sym_file,lastfile) == 0)) {
/* Go find debugging information for the function */
scan_function(s+1, stabstr, ns -i - 1, f);
f->loc_srcfile = wad_strdup(srcfile);
f->loc_objfile = wad_strdup(objfile);
return 1;
}
} else {
infunc = 0;
}
} else if (debug->found && (s->n_type == N_SLINE) && (infunc)) {
/* Line number location */
if (s->n_value < offset) {
debug->line_number = s->n_desc;
} else return 1;
} else if (debug->found && ((s->n_type == N_PSYM) || (s->n_type == N_RSYM)) && (infunc)) {
/* Parameter counting */
char *pname;
char *c;
int len;
pname = stabstr+s->n_strx;
c = strchr(pname,':');
if (c) {
len = (c-pname);
} else {
len = strlen(pname);
}
/* Check if the argument was already used */
/* In this case, the first stab simply identifies an argument. The second
one identifies its location for the debugger */
if (debug->args) {
/* Need to do some fix up for linux here */
WadLocal *a = debug->args;
while (a) {
if ((strncmp(a->name,pname,len) == 0) && (strlen(a->name) == len)) {
/* We already saw this argument. Given a choice between a register and a stack
argument. We will choose the stack version */
if (a->loc == PARM_STACK) {
break;
}
/* Go ahead and use the new argument */
if (s->n_type == 0x40)
a->loc = PARM_REGISTER;
else
a->loc = PARM_STACK;
a->position = s->n_value;
break;
}
a = a->next;
}
if (a) continue; /* We got an argument match. Just skip to the next stab */
}
arg = (WadLocal *) wad_malloc(sizeof(WadLocal));
arg->name = (char *) wad_malloc(len+1);
strncpy(arg->name, pname, len);
arg->name[len] = 0;
if (s->n_type == 0x40)
arg->loc = PARM_REGISTER;
else
arg->loc = PARM_STACK;
arg->position = s->n_value;
arg->type = 0;
arg->next = 0;
if (debug->args) {
debug->lastarg->next = arg;
debug->lastarg = arg;
} else {
debug->args = arg;
debug->lastarg = arg;
}
debug->nargs++;
}
}
if (debug->found) return 1;
return 0;
if (found) {
f->loc_srcfile = wad_strdup(srcfile);
f->loc_objfile = wad_strdup(objfile);
}
return found;
}

343
Tools/WAD/Wad/stack.c
View file

@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------------
* stack.c
*
* This file is used to unwind the C call stack.
* This file unwinds the C call stack and creates a list of stack frames.
*
* Author(s) : David Beazley (beazley@cs.uchicago.edu)
*
@ -10,252 +10,211 @@
* ----------------------------------------------------------------------------- */
#include "wad.h"
#include <sys/types.h>
#include <sys/mman.h>
#include <dlfcn.h>
/* This needs to be changed so that the value is dynamically determined
Might also get weird problems with stacks located in different regions. */
/* -----------------------------------------------------------------------------
* new_frame()
*
* Create a new stack frame object and initialize all of the fields.
* ----------------------------------------------------------------------------- */
#ifdef WAD_SOLARIS
#define STACK_BASE 0xffbf0000
#endif
#ifdef WAD_LINUX
#define STACK_BASE 0xc0000000
#endif
static WadFrame *
new_frame() {
WadFrame *f;
f = (WadFrame *) wad_malloc(sizeof(WadFrame));
f->frameno = 0;
f->segment = 0;
f->object = 0;
f->pc = 0;
f->sp = 0;
f->sp = 0;
f->stack = 0;
f->stack_size = 0;
f->sym_name = 0;
f->sym_file = 0;
f->sym_base = 0;
f->sym_size = 0;
f->sym_type = 0;
f->sym_bind = 0;
f->loc_objfile = 0;
f->loc_srcfile = 0;
f->loc_line = 0;
f->debug_nargs = -1;
f->debug_args = 0;
f->debug_lastarg = 0;
f->last = 0;
f->next = 0;
f->prev = 0;
return f;
}
/* -----------------------------------------------------------------------------
* stack_unwind()
*
* Perform a single level of stack unwinding given the stack pointer, frame pointer
* and program counter.
* This function performs a single level of stack unwinding given the stack pointer
* frame pointer and program counter. Validations are made to make sure the stack
* and frame pointers are in valid memory. Updates the values of the sp, pc, and fp
* in-place. Returns a stack frame object on success, 0 if memory is invalid
* or the end of the stack has been reached.
* ----------------------------------------------------------------------------- */
static void
stack_unwind(unsigned long *sp, unsigned long *pc, unsigned long *fp) {
static WadFrame *
stack_unwind(unsigned long *pc, unsigned long *sp, unsigned long *fp) {
WadSegment *sp_seg, *fp_seg;
WadFrame *f;
if (wad_debug_mode & DEBUG_UNWIND) {
wad_printf("::: stack unwind : pc = %x, sp = %x, fp = %x\n", *pc, *sp, *fp);
}
/* Verify that the sp and fp are in mapped memory */
sp_seg = wad_segment_find((void *) *sp);
fp_seg = wad_segment_find((void *) *fp);
if (!(sp_seg && fp_seg && (sp_seg == fp_seg))) {
/* Either the stack pointer or frame pointer is invalid. Or, the stack pointer
and frame pointer are in different memory regions. */
return 0;
}
/* Check to see if the PC is valid */
if (!wad_segment_valid((void *) *pc)) {
return 0;
}
f = new_frame();
f->pc = *pc;
f->sp = *sp;
f->fp = *fp;
f->segment = wad_segment_find((void *) *pc);
f->stack_size = *fp - *sp;
/* Make a copy of the call stack */
f->stack = (char *) wad_malloc(f->stack_size);
memcpy(f->stack,(void *) *sp, f->stack_size);
/* Update the sp, fp, and pc */
#ifdef WAD_SOLARIS
*pc = *((unsigned long *) *sp+15); /* %i7 - Return address */
*sp = *((unsigned long *) *sp+14); /* %i6 - frame pointer */
if (wad_segment_valid((void *) *sp)) {
*fp = *((unsigned long *) *sp+14);
} else {
*fp = 0;
}
#endif
#ifdef WAD_LINUX
*pc = *((unsigned long *) *fp+1);
*sp = *fp;
*fp = *((unsigned long *) *fp);
/* If we get a frame pointer of zero, we've gone off the end of the stack. Set the
stack pointer to zero to signal the stack unwinder. */
if (*fp == 0) {
if (wad_segment_valid((void *) ((unsigned long *) *fp+1))) {
*pc = *((unsigned long *) *fp+1);
*sp = *fp;
} else {
*sp = 0;
}
if (wad_segment_valid((void *) ((unsigned long *) *fp))) {
*fp = *((unsigned long *) *fp);
} else {
*fp = 0;
}
#endif
return f;
}
/* -----------------------------------------------------------------------------
* wad_stack_trace()
*
* Create a stack trace of the process. Returns a linked list of stack frames
* with debugging information and other details.
* with a limited about debugging information and other details.
* ----------------------------------------------------------------------------- */
WadFrame *
wad_stack_trace(unsigned long pc, unsigned long sp, unsigned long fp) {
WadSegment *ws;
WadObjectFile *wo;
WadFrame *firstframe=0, *lastframe=0, *frame=0;
WadDebug wd;
WadSymbol wsym;
unsigned long p_pc;
unsigned long p_sp;
unsigned long p_fp;
unsigned long p_lastsp;
int n = 0;
/* Read the segments */
if (wad_segment_read() < 0) {
wad_printf("WAD: Unable to read segment map\n");
return 0;
}
/* Try to do a stack traceback */
p_pc = pc;
p_sp = sp;
p_fp = fp;
while (p_sp) {
/* Add check for stack validity here */
ws = wad_segment_find((void *) p_sp);
if (!ws) {
/* If the stack is bad, we are really hosed here */
write(1,"Whoa. Stack is corrupted. Bailing out.\n", 39);
exit(1);
break;
}
ws = wad_segment_find((void *) p_pc);
{
int stacksize = 0;
char *symname = 0;
unsigned long value;
/* Try to load the object file for this address */
if (ws) {
wo = wad_object_load(ws->mappath);
}
else {
wo = 0;
}
/* Try to find the symbol corresponding to this PC */
if (wo) {
symname = wad_find_symbol(wo, (void *) p_pc, (unsigned long) ws->base, &wsym);
} else {
symname = 0;
}
value = wsym.value;
frame = (WadFrame *) wad_malloc(sizeof(WadFrame));
frame->frameno = n;
frame->pc = p_pc;
frame->sp = p_sp;
frame->nlocals = -1;
frame->nargs = -1;
frame->objfile = 0;
frame->srcfile = 0;
frame->psp = 0;
frame->next = 0;
while ((frame = stack_unwind(&p_pc, &p_sp, &p_fp))) {
/* Got a frame successfully */
frame->frameno = n;
if (lastframe) {
lastframe->next = frame;
frame->prev = lastframe;
frame->last = 0;
if (lastframe) {
lastframe->next = frame;
lastframe = frame;
} else {
lastframe = frame;
firstframe = frame;
}
frame->symbol = wad_strdup(symname);
frame->sym_base = value + (long) ws->base;
n++;
if (symname) {
/* Try to gather some debugging information about this symbol */
if (wad_debug_info(wo,&wsym, p_pc - (unsigned long) ws->base - value, &wd)) {
frame->srcfile = wad_strdup(wd.srcfile);
frame->objfile = wad_strdup(wd.objfile);
frame->args = wd.args;
frame->lastarg = wd.lastarg;
frame->nargs = wd.nargs;
/*frame.nargs = wd.nargs;
if (wd.nargs > 0) {
argsize = sizeof(WadParm)*wd.nargs;
}
*/
frame->line_number = wd.line_number;
}
}
#ifdef WAD_SOLARIS
#ifdef OLD /* Might not be necessary. Registers stored on stack already */
/* Before unwinding the stack, copy the locals and %o registers from previous frame */
if (!firstframe) {
int i;
long *lsp = (long *) p_lastsp;
for (i = 0; i < 16; i++) {
/* wad_printf("regs[%d] = 0x%x\n", lsp[i]); */
frame.regs[i] = lsp[i];
}
}
#endif
#endif
/* Determine stack frame size */
p_lastsp = p_sp;
stack_unwind(&p_sp, &p_pc, &p_fp);
if (p_sp) {
stacksize = p_sp - p_lastsp;
} else {
stacksize = STACK_BASE - p_lastsp;
}
/* Sanity check */
if ((p_sp + stacksize) > STACK_BASE) {
stacksize = STACK_BASE - p_sp;
}
/* Set the frame pointer and stack size */
frame->fp = p_sp;
frame->stack_size = stacksize;
/* Copy stack data */
frame->psp = (char *) wad_malloc(stacksize);
if (frame->psp) {
memcpy(frame->psp, (void *) p_lastsp, stacksize);
}
lastframe = frame;
} else {
firstframe = frame;
lastframe = frame;
}
n++;
}
lastframe->last = 1;
if (lastframe)
lastframe->last = 1;
return firstframe;
}
void wad_release_trace() {
}
/* -----------------------------------------------------------------------------
* wad_stack_debug()
*
* Make a dump of a stack trace
* ----------------------------------------------------------------------------- */
/* This function steals an argument out of a frame further up the call stack :-) */
long wad_steal_arg(WadFrame *f, char *symbol, int argno, int *error) {
long *regs;
WadFrame *lastf = 0;
void wad_stack_debug(WadFrame *frame) {
if (wad_debug_mode & DEBUG_STACK) {
/* Walk the exception frames and try to find a return point */
while (frame) {
/* Print out detailed stack trace information */
printf("::: Stack frame - 0x%08x :::\n", frame);
printf(" pc = %x\n", frame->pc);
printf(" sp = %x\n", frame->sp);
printf(" fp = %x\n", frame->fp);
printf(" stack = %x\n", frame->stack);
printf(" size = %x\n", frame->stack_size);
printf(" segment = %x (%s)\n", frame->segment, frame->segment ? frame->segment->mappath : "?");
printf(" object = %x (%s)\n", frame->object, frame->object ? frame->object->path : "?");
*error = 0;
/* Start searching */
while (f) {
if (f->symbol && (strcmp(f->symbol,symbol) == 0)) {
/* Got a match */
if (lastf) {
regs = (long *) f->psp;
return regs[8+argno];
if (frame->sym_name) {
printf(" sym_name = %s\n", frame->sym_name);
printf(" sym_base = %x\n", frame->sym_base);
printf(" sym_size = %x\n", frame->sym_size);
printf(" sym_bind = %x\n", frame->sym_bind);
printf(" sym_file = %s\n", frame->sym_file ? frame->sym_file : "");
}
}
lastf = f;
f = f->next;
}
*error = -1;
return 0;
}
long wad_steal_outarg(WadFrame *f, char *symbol, int argno, int *error) {
long *regs;
WadFrame *lastf = 0;
*error = 0;
/* Start searching */
while (f) {
if (f->symbol && (strcmp(f->symbol,symbol) == 0)) {
/* Got a match */
if (lastf) {
#ifdef WAD_SOLARIS
regs = (long *) lastf->psp;
return regs[8+argno];
#endif
#ifdef WAD_LINUX
regs = (long *) f->psp;
return regs[argno+2];
#endif
if (frame->loc_srcfile) {
printf(" loc_srcfile = %s\n", frame->loc_srcfile);
}
if (frame->loc_objfile) {
printf(" loc_objfile = %s\n", frame->loc_objfile);
}
printf(" loc_line = %d\n", frame->loc_line);
printf(" debug_nargs = %d\n", frame->debug_nargs);
if (frame->debug_args) {
int i = 0;
WadLocal *p = frame->debug_args;
printf(" debug_args = [ \n");
while (p) {
printf(" arg[%d] : name = '%s', loc = %d, type = %d, stack = %d, reg = %d, line=%d, ptr=%x(%d)\n", i, p->name, p->loc, p->type, p->stack,p->reg,p->line,p->ptr,p->size);
p = p->next;
}
}
printf(" ]\n");
frame = frame->next;
}
lastf = f;
f = f->next;
}
*error = -1;
return 0;
}

119
Tools/WAD/Wad/vars.c Normal file
View file

@ -0,0 +1,119 @@
/* -----------------------------------------------------------------------------
* vars.c
*
* This file examines the stack trace and tries to make some sense out of
* collected debugging information. This includes locating the data on
* the stack and/or registers.
*
* This feature is detached from the debugging info collector to make
* it independent of debugging formats.
*
* Author(s) : David Beazley (beazley@cs.uchicago.edu)
*
* Copyright (C) 2000. The University of Chicago
* See the file LICENSE for information on usage and redistribution.
* ----------------------------------------------------------------------------- */
#include "wad.h"
/* -----------------------------------------------------------------------------
* wad_build_vars()
*
* Build variable information for a single stack frame
* ----------------------------------------------------------------------------- */
void wad_build_vars(WadFrame *f) {
char *stack = 0;
char *nstack = 0;
char *pstack = 0;
WadLocal *loc;
int laststack = 0;
WadLocal *lastloc = 0;
stack = (char *) f->stack;
if (f->next) {
nstack = (char *) f->next->stack;
}
if (f->prev) {
pstack = (char *) f->prev->stack;
}
loc = f->debug_args;
while (loc) {
loc->ptr = 0;
if (loc->loc == PARM_STACK) {
if ((loc->stack >= 0) && (nstack)) {
loc->ptr = (void *) (nstack + loc->stack);
} else if (loc->stack < 0) {
loc->ptr = (void *) (stack + f->stack_size + loc->stack);
}
}
if (lastloc) {
/* Figure out the size */
if (!lastloc->size)
lastloc->size = abs(loc->stack - lastloc->stack);
}
lastloc = loc;
loc = loc->next;
}
/* If last size is not set. Assume that it is a word */
if (lastloc && (!lastloc->size)) {
lastloc->size = 4;
}
}
/* Try to make a formatted version of a local */
char *wad_format_var(WadLocal *l) {
static char hexdigits[] = "0123456789abcdef";
static char buffer[1024];
buffer[0] = 0;
switch(l->type) {
case TYPE_UNKNOWN:
default:
/* Hmmm. Unknown data type. We'll just dump out digits */
if (l->ptr) {
if (l->size <= 8) {
int incr,i;
int b;
int leading = 1;
char *c;
char *ptr;
#ifdef WAD_LITTLE_ENDIAN
ptr = ((char *) l->ptr) + l->size - 1;
incr = -1;
#else
ptr = (char *) l->ptr;
incr =1 ;
#endif
strcat(buffer,"0x");
c = buffer+2;
for (i = 0; i < l->size; i++) {
b = (int) *ptr;
if (!leading || (b)) {
if (!leading || (b & 0xf0))
*(c++) = hexdigits[(b & 0xf0) >> 4];
*(c++) = hexdigits[(b & 0xf)];
leading = 0;
}
ptr += incr;
}
if (leading)
*(c++) = '0';
*c = 0;
} else {
sprintf(buffer,"unknown(%d bytes)", l->size);
}
}
}
return buffer;
}

48
Tools/WAD/Wad/wadpy.cxx
View file

@ -100,10 +100,11 @@ static void handler(int signo, WadFrame *frame, char *ret) {
int len = 0;
PyObject *type;
char *name;
char *fd;
WadFrame *f;
WadFrame *fline = 0;
printf("python handler.\n");
if (!ret) {
wad_default_callback(signo, frame, ret);
return;
@ -130,34 +131,32 @@ static void handler(int signo, WadFrame *frame, char *ret) {
type = PyExc_RuntimeError;
break;
}
fd = (char *) frame;
f = (WadFrame *) fd;
f = frame;
/* Find the last exception frame */
while (!f->last) {
fd = fd + f->size;
f = (WadFrame *) fd;
f= f->next;
}
printf("f = %x\n", f);
/* Now work backwards */
fd = fd - f->lastsize;
f = (WadFrame *) fd;
while (1) {
f = f->prev;
while (f) {
sprintf(temp,"#%-3d 0x%08x in ", f->frameno, f->pc);
strcat(message,temp);
strcat(message,*(fd + f->sym_off) ? fd+f->sym_off : "?");
strcat(message, f->sym_name ? f->sym_name : "?");
strcat(message,"(");
strcat(message,wad_arg_string(f));
strcat(message,")");
if (strlen(SRCFILE(f))) {
if (f->loc_srcfile && strlen(f->loc_srcfile)) {
strcat(message," in '");
strcat(message, wad_strip_dir(SRCFILE(f)));
strcat(message, wad_strip_dir(f->loc_srcfile));
strcat(message,"'");
if (f->line_number > 0) {
sprintf(temp,", line %d", f->line_number);
if (f->loc_line > 0) {
sprintf(temp,", line %d", f->loc_line);
strcat(message,temp);
{
int fd;
fd = open(SRCFILE(f), O_RDONLY);
fd = open(f->loc_srcfile, O_RDONLY);
if (fd > 0) {
fline = f;
}
@ -165,34 +164,32 @@ static void handler(int signo, WadFrame *frame, char *ret) {
}
}
} else {
if (strlen(fd+f->obj_off)) {
if (f->loc_objfile && strlen(f->loc_objfile)) {
strcat(message," from '");
strcat(message, wad_strip_dir(OBJFILE(f)));
strcat(message, wad_strip_dir(f->loc_objfile));
strcat(message,"'");
}
}
strcat(message,"\n");
if (!f->lastsize) break;
fd = fd - f->lastsize;
f = (WadFrame *) fd;
f = f->prev;
}
if (fline) {
int first;
int last;
char *line, *c;
int i;
first = fline->line_number - 2;
last = fline->line_number + 2;
first = fline->loc_line - 2;
last = fline->loc_line + 2;
if (first < 1) first = 1;
line = wad_load_source(SRCFILE(fline),first);
line = wad_load_source(fline->loc_srcfile,first);
if (line) {
strcat(message,"\n");
strcat(message, SRCFILE(fline));
sprintf(temp,", line %d\n\n", fline->line_number);
strcat(message, fline->loc_srcfile);
sprintf(temp,", line %d\n\n", fline->loc_line);
strcat(message, temp);
for (i = first; i <= last; i++) {
if (i == fline->line_number) strcat(message," => ");
if (i == fline->loc_line) strcat(message," => ");
else strcat(message," ");
c = strchr(line,'\n');
if (c) {
@ -222,7 +219,6 @@ static void handler(int signo, WadFrame *frame, char *ret) {
back. */
PyErr_SetString(type, message);
wad_release_trace();
}
static void pywadinit() {