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exception_support.h: New header file.

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* libsupc++/exception_support.h: New header file.
	* libsupc++/vec.cc: Include it.
	(__cxa_vec_new2): Recatch exceptions before rethrows.
	(__cxa_vec_new3): Likewise.
	(__cxa_vec_ctor): Likewise.
	(__cxa_vec_cctor): Likewise.
	(__cxa_vec_dtor): Likewise.
	(__cxa_vec_delete2): Likewise.
	(__cxa_vec_delete3): Likewise.

From-SVN: r37551
This commit is contained in:
Mark Mitchell 2000-11-19 02:22:53 +00:00 committed by Mark Mitchell
parent 0a8ad41790
commit f1f0c5a2f7
3 changed files with 64 additions and 54 deletions
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12
libstdc++-v3/ChangeLog
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@ -1,3 +1,15 @@
2000-11-18 Mark Mitchell <mark@codesourcery.com>
* libsupc++/exception_support.h: New header file.
* libsupc++/vec.cc: Include it.
(__cxa_vec_new2): Recatch exceptions before rethrows.
(__cxa_vec_new3): Likewise.
(__cxa_vec_ctor): Likewise.
(__cxa_vec_cctor): Likewise.
(__cxa_vec_dtor): Likewise.
(__cxa_vec_delete2): Likewise.
(__cxa_vec_delete3): Likewise.
2000-11-17 Theodore Papadopoulo <Theodore.Papadopoulo@sophia.inria.fr>
* include/bits/stl_tree.h: Overload operators == and != to be able

49
libstdc++-v3/libsupc++/exception_support.cc
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@ -32,8 +32,7 @@
#include "typeinfo"
#include "exception"
#include <cstddef>
#include "gansidecl.h" /* Needed to support macros used in eh-common.h. */
#include "eh-common.h"
#include "exception_support.h"
/* Define terminate, unexpected, set_terminate, set_unexpected as
well as the default terminate func and default unexpected func. */
@ -80,40 +79,6 @@ std::unexpected ()
__unexpected_func ();
}
/* The type of a function called to clean up an exception object.
(These will be destructors.) Under the old ABI, these take a
second argument (the `in-charge' argument), that indicates whether
or not do delete the object, and whether or not to destroy virtual
bases. Under the new ABI, there is no second argument. */
#if !defined (__GXX_ABI_VERSION) || __GXX_ABI_VERSION < 100
typedef void (*cleanup_fn)(void *, int);
/* The `2' is the value for the in-charge parameter that indicates
that virtual bases should be destroyed. */
#define CALL_CLEANUP(FN, THIS) FN (THIS, 2)
#else
typedef void (*cleanup_fn)(void *);
#define CALL_CLEANUP(FN, THIS) FN (THIS)
#endif
/* C++-specific state about the current exception.
This must match init_exception_processing().
Note that handlers and caught are not redundant; when rethrown, an
exception can have multiple active handlers and still be considered
uncaught. */
struct cp_eh_info
{
__eh_info eh_info;
void *value;
void *type;
cleanup_fn cleanup;
bool caught;
cp_eh_info *next;
long handlers;
void *original_value;
};
/* Language-specific EH info pointer, defined in libgcc2. */
extern "C" cp_eh_info **__get_eh_info (); // actually void **
@ -281,7 +246,7 @@ __cp_pop_exception (cp_eh_info *p)
/* We're doing a rethrow. Find the currently handled exception, mark it
uncaught, and move it to the top of the EH stack. */
extern "C" void
extern "C" cp_eh_info *
__uncatch_exception (void)
{
cp_eh_info **stack = __get_eh_info ();
@ -308,6 +273,16 @@ __uncatch_exception (void)
}
p->caught = false;
return p;
}
/* Mark P as caught after we previously marked it as uncaught. */
extern "C" void
__recatch_exception (cp_eh_info *p)
{
p->caught = true;
}
/* As per [except.unexpected]:

57
libstdc++-v3/libsupc++/vec.cc
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@ -32,13 +32,21 @@
#include <new>
#include <exception>
// Exception handling hook, to mark current exception as not caught --
// generally because we're about to rethrow it after some cleanup.
extern "C" void __uncatch_exception (void);
#include "exception_support.h"
namespace __cxxabiv1
{
namespace
{
struct uncatch_exception {
uncatch_exception () { p = __uncatch_exception (); }
~uncatch_exception () { __recatch_exception (p); }
cp_eh_info *p;
};
}
/* allocate and construct array */
extern "C" void *
__cxa_vec_new (std::size_t element_count,
@ -76,8 +84,10 @@ __cxa_vec_new2 (std::size_t element_count,
}
catch (...)
{
__uncatch_exception ();
dealloc (base - padding_size);
{
uncatch_exception ue;
dealloc (base - padding_size);
}
throw;
}
return base;
@ -107,8 +117,10 @@ __cxa_vec_new3 (std::size_t element_count,
}
catch (...)
{
__uncatch_exception ();
dealloc (base - padding_size, size);
{
uncatch_exception ue;
dealloc (base - padding_size, size);
}
throw;
}
return base;
@ -133,8 +145,10 @@ __cxa_vec_ctor (void *array_address,
}
catch (...)
{
__uncatch_exception ();
__cxa_vec_dtor (array_address, ix, element_size, destructor);
{
uncatch_exception ue;
__cxa_vec_dtor (array_address, ix, element_size, destructor);
}
throw;
}
}
@ -162,8 +176,10 @@ __cxa_vec_cctor (void *dest_array,
}
catch (...)
{
__uncatch_exception ();
__cxa_vec_dtor (dest_array, ix, element_size, destructor);
{
uncatch_exception ue;
__cxa_vec_dtor (dest_array, ix, element_size, destructor);
}
throw;
}
}
@ -197,8 +213,11 @@ __cxa_vec_dtor (void *array_address,
// [except.ctor]/3 If a destructor called during stack unwinding
// exits with an exception, terminate is called.
std::terminate ();
__uncatch_exception ();
__cxa_vec_dtor (array_address, ix, element_size, destructor);
{
uncatch_exception ue;
__cxa_vec_dtor (array_address, ix, element_size,
destructor);
}
throw;
}
}
@ -236,8 +255,10 @@ __cxa_vec_delete2 (void *array_address,
}
catch (...)
{
__uncatch_exception ();
dealloc (base);
{
uncatch_exception ue;
dealloc (base);
}
throw;
}
}
@ -266,8 +287,10 @@ __cxa_vec_delete3 (void *array_address,
}
catch (...)
{
__uncatch_exception ();
dealloc (base, size);
{
uncatch_exception ue;
dealloc (base, size);
}
throw;
}
}