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Check when backtracking the stack if frames are correct (readable).

This commit is contained in:
Eric Pouech 1999-05-24 08:13:49 +00:00 committed by Alexandre Julliard
parent 89fc6fda97
commit cb0f1a9cdc
1 changed files with 35 additions and 2 deletions
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37
debugger/stack.c
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@ -225,10 +225,18 @@ static void DEBUG_DoBackTrace(int noisy)
next_switch = THREAD_Current()->cur_stack;
if (is16) {
if (IsBadReadPtr((STACK32FRAME*)next_switch, sizeof(STACK32FRAME))) {
fprintf( stderr, "Bad stack frame %p\n", (STACK32FRAME*)next_switch );
return;
}
cur_switch = (DWORD)((STACK32FRAME*)next_switch)->frame16;
sw_addr.seg = SELECTOROF(cur_switch);
sw_addr.off = OFFSETOF(cur_switch);
} else {
if (IsBadReadPtr((STACK16FRAME*)PTR_SEG_TO_LIN(next_switch), sizeof(STACK16FRAME))) {
fprintf( stderr, "Bad stack frame %p\n", (STACK16FRAME*)PTR_SEG_TO_LIN(next_switch) );
return;
}
cur_switch = (DWORD)((STACK16FRAME*)PTR_SEG_TO_LIN(next_switch))->frame32;
sw_addr.seg = ss;
sw_addr.off = cur_switch;
@ -245,7 +253,15 @@ static void DEBUG_DoBackTrace(int noisy)
* yes, I know this is confusing, it gave me a headache too */
if (is16) {
STACK32FRAME *frame = (STACK32FRAME*)next_switch;
DBG_ADDR code = { NULL, 0, frame->retaddr };
DBG_ADDR code;
if (IsBadReadPtr((STACK32FRAME*)next_switch, sizeof(STACK32FRAME))) {
fprintf( stderr, "Bad stack frame %p\n", (STACK32FRAME*)next_switch );
return;
}
code.type = NULL;
code.seg = 0;
code.off = frame->retaddr;
cs = 0;
addr.seg = 0;
@ -253,6 +269,10 @@ static void DEBUG_DoBackTrace(int noisy)
DEBUG_ForceFrame( &addr, &code, ++frameno, 32, noisy );
next_switch = cur_switch;
if (IsBadReadPtr((STACK16FRAME*)PTR_SEG_TO_LIN(next_switch), sizeof(STACK16FRAME))) {
fprintf( stderr, "Bad stack frame %p\n", (STACK16FRAME*)PTR_SEG_TO_LIN(next_switch) );
return;
}
cur_switch = (DWORD)((STACK16FRAME*)PTR_SEG_TO_LIN(next_switch))->frame32;
sw_addr.seg = 0;
sw_addr.off = cur_switch;
@ -260,7 +280,16 @@ static void DEBUG_DoBackTrace(int noisy)
is16 = FALSE;
} else {
STACK16FRAME *frame = (STACK16FRAME*)PTR_SEG_TO_LIN(next_switch);
DBG_ADDR code = { NULL, frame->cs, frame->ip };
DBG_ADDR code;
if (IsBadReadPtr((STACK16FRAME*)PTR_SEG_TO_LIN(next_switch), sizeof(STACK16FRAME))) {
fprintf( stderr, "Bad stack frame %p\n", (STACK16FRAME*)PTR_SEG_TO_LIN(next_switch) );
return;
}
code.type = NULL;
code.seg = frame->cs;
code.off = frame->ip;
cs = frame->cs;
addr.seg = SELECTOROF(next_switch);
@ -268,6 +297,10 @@ static void DEBUG_DoBackTrace(int noisy)
DEBUG_ForceFrame( &addr, &code, ++frameno, 16, noisy );
next_switch = cur_switch;
if (IsBadReadPtr((STACK32FRAME*)next_switch, sizeof(STACK32FRAME))) {
fprintf( stderr, "Bad stack frame %p\n", (STACK32FRAME*)next_switch );
return;
}
cur_switch = (DWORD)((STACK32FRAME*)next_switch)->frame16;
sw_addr.seg = SELECTOROF(cur_switch);
sw_addr.off = OFFSETOF(cur_switch);