On (09/27/12 00:09), Magnus Fromreide wrote:
That they fail to throw exceptions from new is no reason to disable set_new_handler, the newhandler is called by the runtime on out of memory and is intended to allow the user to try fixing the issue. This is true for the noexcept version as well. Is this yet another incompatibility?
right. the funny thing is, guess what, gcc actually has "#ifdef __EXCEPTIONS" within operator new()
44 _GLIBCXX_WEAK_DEFINITION void * 45 operator new (std::size_t sz) _GLIBCXX_THROW (std::bad_alloc) 46 { 47 void *p; 48 49 /* malloc (0) is unpredictable; avoid it. */ 50 if (sz == 0) 51 sz = 1; 52 p = (void *) malloc (sz); 53 while (p == 0) 54 { 55 new_handler handler = __new_handler; 56 if (! handler) 57 #ifdef __EXCEPTIONS 58 throw bad_alloc(); 59 #else 60 std::abort(); 61 #endif 62 handler (); 63 p = (void *) malloc (sz); 64 } 65 66 return p; 67 }
It tourned out, that __EXCEPTIONS with us (for operator new and STL) since 2001 "2001-02-15 Benjamin Kosnik bkoz@redhat.com"
So, I guess this is how Google has came up with the idea of C++ w/o exceptions.
Wow.
-ss
+/* define stubs for C++ exception handling */ +#define try if (true) +#define catch(x) if (false)
If you should do this then I think it should be spelled
#define try if (true) #define catch else if (false)
in order to not break
if (condition) try { } catch(type variable) { }
but it still breaks the syntax for it which can be shown by simply adding an else clause to the if statement.
Oh, and furthermore I consider that Android needs a C++ compiler.
+/* Define __NR_perf_event_open if not already defined */ +#if __arm__ +#ifndef __NR_perf_event_open +#define __NR_perf_event_open 364 +#endif +#endif
+/*
- bionic libc mbstowcs version returns zero when max parameter
- is zero, resulting infinite loops in powertop source. Add
- mbstowcs wrapper to fix it.
- */
+namespace pandroid {
- extern "C" inline size_t mbstowcs(wchar_t *dst,
const char *src, size_t len)- {
return ::mbstowcs(dst, src, ::strlen(src));- }
+}
+#define mbstowcs(dst, src, len) pandroid::mbstowcs(dst, src, len)
Still broken. If dst isn't a NULL pointer then len is the limit on the length of the destination buffer. In throwing away this you open up for stack smashing attacks.