#include <config.h>
#include <stddef.h>
#include <stdlib.h>
#include <java/lang/Class.h>
#include <java/lang/NullPointerException.h>
#include <gnu/gcj/runtime/StackTrace.h>
#include <gnu/gcj/runtime/MethodRef.h>
#include <gnu/gcj/RawData.h>
#include <gcj/cni.h>
#include <jvm.h>
namespace std
{
static __attribute__ ((__noreturn__)) void
abort ()
{
::abort ();
}
}
#include "unwind.h"
struct alignment_test_struct
{
char space;
char end[0] __attribute__((aligned));
};
struct java_exception_header
{
_Unwind_Ptr landingPad;
int handlerSwitchValue;
char pad[sizeof(jthrowable) < sizeof(alignment_test_struct)
? sizeof(alignment_test_struct) - sizeof(jthrowable) : 0]
__attribute__((aligned));
jthrowable value;
_Unwind_Exception unwindHeader;
};
const _Unwind_Exception_Class __gcj_exception_class
= ((((((((_Unwind_Exception_Class) 'G'
<< 8 | (_Unwind_Exception_Class) 'N')
<< 8 | (_Unwind_Exception_Class) 'U')
<< 8 | (_Unwind_Exception_Class) 'C')
<< 8 | (_Unwind_Exception_Class) 'J')
<< 8 | (_Unwind_Exception_Class) 'A')
<< 8 | (_Unwind_Exception_Class) 'V')
<< 8 | (_Unwind_Exception_Class) 'A');
static inline java_exception_header *
get_exception_header_from_ue (_Unwind_Exception *exc)
{
return reinterpret_cast<java_exception_header *>(exc + 1) - 1;
}
extern "C" void
_Jv_Throw (jthrowable value)
{
java_exception_header *xh
= static_cast<java_exception_header *>(_Jv_AllocRawObj (sizeof (*xh)));
if (value == NULL)
value = new java::lang::NullPointerException ();
xh->value = value;
xh->unwindHeader.exception_class = __gcj_exception_class;
xh->unwindHeader.exception_cleanup = NULL;
_Unwind_Reason_Code code;
#ifdef SJLJ_EXCEPTIONS
code = _Unwind_SjLj_RaiseException (&xh->unwindHeader);
#else
code = _Unwind_RaiseException (&xh->unwindHeader);
#endif
abort();
}
#include "unwind-pe.h"
struct lsda_header_info
{
_Unwind_Ptr Start;
_Unwind_Ptr LPStart;
const unsigned char *TType;
const unsigned char *action_table;
unsigned char ttype_encoding;
unsigned char call_site_encoding;
};
static const unsigned char *
parse_lsda_header (_Unwind_Context *context, const unsigned char *p,
lsda_header_info *info)
{
_Unwind_Word tmp;
unsigned char lpstart_encoding;
info->Start = (context ? _Unwind_GetRegionStart (context) : 0);
lpstart_encoding = *p++;
if (lpstart_encoding != DW_EH_PE_omit)
p = read_encoded_value (context, lpstart_encoding, p, &info->LPStart);
else
info->LPStart = info->Start;
info->ttype_encoding = *p++;
if (info->ttype_encoding != DW_EH_PE_omit)
{
p = read_uleb128 (p, &tmp);
info->TType = p + tmp;
}
else
info->TType = 0;
info->call_site_encoding = *p++;
p = read_uleb128 (p, &tmp);
info->action_table = p + tmp;
return p;
}
static void **
get_ttype_entry (_Unwind_Context *context, lsda_header_info *info, long i)
{
_Unwind_Ptr ptr;
i *= size_of_encoded_value (info->ttype_encoding);
read_encoded_value (context, info->ttype_encoding, info->TType - i, &ptr);
return reinterpret_cast<void **>(ptr);
}
#ifdef SJLJ_EXCEPTIONS
#define PERSONALITY_FUNCTION __gcj_personality_sj0
#define __builtin_eh_return_data_regno(x) x
#else
#define PERSONALITY_FUNCTION __gcj_personality_v0
#endif
extern "C" _Unwind_Reason_Code
PERSONALITY_FUNCTION (int version,
_Unwind_Action actions,
_Unwind_Exception_Class exception_class,
struct _Unwind_Exception *ue_header,
struct _Unwind_Context *context)
{
java_exception_header *xh = get_exception_header_from_ue (ue_header);
lsda_header_info info;
const unsigned char *language_specific_data;
const unsigned char *action_record;
const unsigned char *p;
_Unwind_Ptr landing_pad, ip;
int handler_switch_value;
bool saw_cleanup;
bool saw_handler;
if (version != 1)
return _URC_FATAL_PHASE1_ERROR;
if (actions == (_UA_CLEANUP_PHASE | _UA_HANDLER_FRAME)
&& exception_class == __gcj_exception_class)
{
handler_switch_value = xh->handlerSwitchValue;
landing_pad = xh->landingPad;
goto install_context;
}
language_specific_data = (const unsigned char *)
_Unwind_GetLanguageSpecificData (context);
if (! language_specific_data)
return _URC_CONTINUE_UNWIND;
p = parse_lsda_header (context, language_specific_data, &info);
ip = _Unwind_GetIP (context) - 1;
landing_pad = 0;
action_record = 0;
handler_switch_value = 0;
#ifdef SJLJ_EXCEPTIONS
if ((int) ip <= 0)
return _URC_CONTINUE_UNWIND;
else
{
_Unwind_Word cs_lp, cs_action;
do
{
p = read_uleb128 (p, &cs_lp);
p = read_uleb128 (p, &cs_action);
}
while (--ip);
landing_pad = cs_lp + 1;
if (cs_action)
action_record = info.action_table + cs_action - 1;
goto found_something;
}
#else
while (p < info.action_table)
{
_Unwind_Ptr cs_start, cs_len, cs_lp;
_Unwind_Word cs_action;
p = read_encoded_value (0, info.call_site_encoding, p, &cs_start);
p = read_encoded_value (0, info.call_site_encoding, p, &cs_len);
p = read_encoded_value (0, info.call_site_encoding, p, &cs_lp);
p = read_uleb128 (p, &cs_action);
if (ip < info.Start + cs_start)
p = info.action_table;
else if (ip < info.Start + cs_start + cs_len)
{
if (cs_lp)
landing_pad = info.LPStart + cs_lp;
if (cs_action)
action_record = info.action_table + cs_action - 1;
goto found_something;
}
}
#endif // SJLJ_EXCEPTIONS
return _URC_CONTINUE_UNWIND;
found_something:
saw_cleanup = false;
saw_handler = false;
if (landing_pad == 0)
{
}
else if (action_record == 0)
{
saw_cleanup = true;
}
else
{
_Unwind_Sword ar_filter, ar_disp;
while (1)
{
p = action_record;
p = read_sleb128 (p, &ar_filter);
read_sleb128 (p, &ar_disp);
if (ar_filter == 0)
{
saw_cleanup = true;
}
else if ((actions & _UA_FORCE_UNWIND)
|| exception_class != __gcj_exception_class)
;
else if (ar_filter > 0)
{
void **catch_word = get_ttype_entry (context, &info, ar_filter);
jclass catch_type = (jclass)*catch_word;
if (catch_type == *(void **)&java::lang::Class::class$)
catch_type = (jclass)catch_word;
if (_Jv_IsInstanceOf (xh->value, catch_type))
{
handler_switch_value = ar_filter;
saw_handler = true;
break;
}
}
else
{
abort ();
}
if (ar_disp == 0)
break;
action_record = p + ar_disp;
}
}
if (! saw_handler && ! saw_cleanup)
return _URC_CONTINUE_UNWIND;
if (actions & _UA_SEARCH_PHASE)
{
if (! saw_handler)
return _URC_CONTINUE_UNWIND;
if (exception_class == __gcj_exception_class)
{
xh->handlerSwitchValue = handler_switch_value;
xh->landingPad = landing_pad;
}
return _URC_HANDLER_FOUND;
}
install_context:
_Unwind_SetGR (context, __builtin_eh_return_data_regno (0),
(_Unwind_Ptr) &xh->unwindHeader);
_Unwind_SetGR (context, __builtin_eh_return_data_regno (1),
handler_switch_value);
_Unwind_SetIP (context, landing_pad);
return _URC_INSTALL_CONTEXT;
}