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vcruntime140_1: Support two continuation addresses for catchblock. 

MSVC generates that sometimes when there is a goto from catch block.

Fixes a crash in Company of Heroes 2.

Signed-off-by: Paul Gofman <pgofman@codeweavers.com>
Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Paul Gofman 2021-03-03 16:10:39 +01:00 committed by Alexandre Julliard
parent e979ee96b6
commit 049bd08d8b
1 changed files with 46 additions and 13 deletions
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59
dlls/vcruntime140_1/except_x86_64.c
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@ -20,6 +20,8 @@
#ifdef __x86_64__
#include <stdlib.h>
#include "wine/exception.h"
#include "wine/debug.h"
#include "cppexcept.h"
@ -66,12 +68,14 @@ typedef struct
UINT type_info;
int offset;
UINT handler;
UINT ret_addr;
UINT ret_addr[2];
} catchblock_info;
#define CATCHBLOCK_FLAGS 0x01
#define CATCHBLOCK_TYPE_INFO 0x02
#define CATCHBLOCK_OFFSET 0x04
#define CATCHBLOCK_RET_ADDR 0x10
#define CATCHBLOCK_RET_ADDR_MASK 0x30
#define CATCHBLOCK_RET_ADDR 0x10
#define CATCHBLOCK_TWO_RET_ADDRS 0x20
#define TYPE_FLAG_CONST 1
#define TYPE_FLAG_VOLATILE 2
@ -82,6 +86,8 @@ typedef struct
#define UNWIND_TYPE_DTOR_PTR 2
#define UNWIND_TYPE_FRAME 3
#define CONSOLIDATE_UNWIND_PARAMETER_COUNT 10
typedef struct
{
UINT start_level;
@ -214,19 +220,31 @@ static void read_tryblock_info(BYTE **b, tryblock_info *ti, ULONG64 image_base)
static BOOL read_catchblock_info(BYTE **b, catchblock_info *ci)
{
BYTE ret_addr_type;
memset(ci, 0, sizeof(*ci));
ci->header = **b;
(*b)++;
if (ci->header & ~(CATCHBLOCK_FLAGS | CATCHBLOCK_TYPE_INFO | CATCHBLOCK_OFFSET | CATCHBLOCK_RET_ADDR))
if (ci->header & ~(CATCHBLOCK_FLAGS | CATCHBLOCK_TYPE_INFO | CATCHBLOCK_OFFSET | CATCHBLOCK_RET_ADDR_MASK))
{
FIXME("unknown header: %x\n", ci->header);
return FALSE;
}
ret_addr_type = ci->header & CATCHBLOCK_RET_ADDR_MASK;
if (ret_addr_type == (CATCHBLOCK_RET_ADDR | CATCHBLOCK_TWO_RET_ADDRS))
{
FIXME("unsupported ret addr type.\n");
return FALSE;
}
if (ci->header & CATCHBLOCK_FLAGS) ci->flags = decode_uint(b);
if (ci->header & CATCHBLOCK_TYPE_INFO) ci->type_info = read_rva(b);
if (ci->header & CATCHBLOCK_OFFSET) ci->offset = decode_uint(b);
ci->handler = read_rva(b);
if (ci->header & CATCHBLOCK_RET_ADDR) ci->ret_addr = decode_uint(b);
if (ret_addr_type == CATCHBLOCK_RET_ADDR || ret_addr_type == CATCHBLOCK_TWO_RET_ADDRS)
ci->ret_addr[0] = decode_uint(b);
if (ret_addr_type == CATCHBLOCK_TWO_RET_ADDRS)
ci->ret_addr[1] = decode_uint(b);
return TRUE;
}
@ -303,9 +321,9 @@ static BOOL validate_cxx_function_descr4(const cxx_function_descr *descr, DISPAT
catchblock_info ci;
if (!read_catchblock_info(&catchblock, &ci)) return FALSE;
TRACE(" %d: header 0x%x offset %d handler 0x%x(%p) "
"ret addr %x type %x %s\n", j, ci.header, ci.offset,
"ret addr[0] %#x ret_addr[1] %#x type %#x %s\n", j, ci.header, ci.offset,
ci.handler, rva_to_ptr(ci.handler, image_base),
ci.ret_addr, ci.type_info,
ci.ret_addr[0], ci.ret_addr[1], ci.type_info,
dbgstr_type_info(rva_to_ptr(ci.type_info, image_base)));
}
}
@ -535,14 +553,26 @@ static void* WINAPI call_catch_block4(EXCEPTION_RECORD *rec)
__FINALLY_CTX(cxx_catch_cleanup, &ctx)
FlsSetValue(fls_index, (void*)-2);
if (rec->ExceptionInformation[8]) return (void*)rec->ExceptionInformation[8];
return ret_addr;
TRACE("handler returned %p, ret_addr[0] %p, ret_addr[1] %p.\n",
ret_addr, rec->ExceptionInformation[8], rec->ExceptionInformation[9]);
if (rec->ExceptionInformation[9])
{
if ((ULONG_PTR)ret_addr > 1)
{
ERR("unexpected handler result %p.\n", ret_addr);
abort();
}
return (void*)rec->ExceptionInformation[8 + (ULONG_PTR)ret_addr];
}
return rec->ExceptionInformation[8] ? (void *)rec->ExceptionInformation[8] : ret_addr;
}
static inline BOOL cxx_is_consolidate(const EXCEPTION_RECORD *rec)
{
return rec->ExceptionCode==STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters==9 &&
rec->ExceptionInformation[0]==(ULONG_PTR)call_catch_block4;
return rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE
&& rec->NumberParameters == CONSOLIDATE_UNWIND_PARAMETER_COUNT
&& rec->ExceptionInformation[0] == (ULONG_PTR)call_catch_block4;
}
static inline void find_catch_block4(EXCEPTION_RECORD *rec, CONTEXT *context,
@ -610,7 +640,7 @@ static inline void find_catch_block4(EXCEPTION_RECORD *rec, CONTEXT *context,
memset(&catch_record, 0, sizeof(catch_record));
catch_record.ExceptionCode = STATUS_UNWIND_CONSOLIDATE;
catch_record.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
catch_record.NumberParameters = 9;
catch_record.NumberParameters = CONSOLIDATE_UNWIND_PARAMETER_COUNT;
catch_record.ExceptionInformation[0] = (ULONG_PTR)call_catch_block4;
catch_record.ExceptionInformation[1] = orig_frame;
catch_record.ExceptionInformation[2] = tryblock.catch_level;
@ -620,9 +650,12 @@ static inline void find_catch_block4(EXCEPTION_RECORD *rec, CONTEXT *context,
(ULONG_PTR)rva_to_ptr(ci.handler, dispatch->ImageBase);
catch_record.ExceptionInformation[6] = (ULONG_PTR)untrans_rec;
catch_record.ExceptionInformation[7] = (ULONG_PTR)context;
if (ci.ret_addr)
if (ci.ret_addr[0])
catch_record.ExceptionInformation[8] = (ULONG_PTR)rva_to_ptr(
ci.ret_addr + dispatch->FunctionEntry->BeginAddress, dispatch->ImageBase);
ci.ret_addr[0] + dispatch->FunctionEntry->BeginAddress, dispatch->ImageBase);
if (ci.ret_addr[1])
catch_record.ExceptionInformation[9] = (ULONG_PTR)rva_to_ptr(
ci.ret_addr[1] + dispatch->FunctionEntry->BeginAddress, dispatch->ImageBase);
RtlUnwindEx((void*)frame, (void*)dispatch->ControlPc, &catch_record, NULL, &ctx, NULL);
}
}