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dbghelp: In i386 stack unwinder, only check for NULL ebp after calling the dwarf/MSVC unwinders as they allow NULL ebp.

This commit is contained in:
Eric Pouech 2012-02-13 21:42:04 +01:00 committed by Alexandre Julliard
parent 0905afd0bc
commit 90207b1d69
1 changed files with 3 additions and 2 deletions
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5
dlls/dbghelp/cpu_i386.c
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@ -115,6 +115,7 @@ static BOOL fetch_next_frame32(struct cpu_stack_walk* csw,
/* do a simple unwind using ebp
* we assume a "regular" prologue in the function has been used
*/
if (!context->Ebp) return FALSE;
context->Esp = context->Ebp + 2 * sizeof(DWORD);
if (!sw_read_mem(csw, context->Ebp + sizeof(DWORD), &val32, sizeof(DWORD)))
{
@ -273,7 +274,6 @@ static BOOL i386_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, CO
}
else
{
if (frame->AddrFrame.Offset == 0) goto done_err;
if (frame->AddrFrame.Mode == AddrModeFlat)
{
assert(curr_mode == stm_32bit);
@ -389,7 +389,8 @@ static BOOL i386_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, CO
frame->AddrPC = frame->AddrReturn;
frame->AddrStack.Offset = frame->AddrFrame.Offset + 2 * sizeof(WORD);
/* "pop up" previous BP value */
if (!sw_read_mem(csw, sw_xlat_addr(csw, &frame->AddrFrame),
if (!frame->AddrFrame.Offset ||
!sw_read_mem(csw, sw_xlat_addr(csw, &frame->AddrFrame),
&val16, sizeof(WORD)))
goto done_err;
frame->AddrFrame.Offset = val16;