gcc/libgo/runtime
Ian Lance Taylor abd471378c runtime: fix 32-bit malloc for pointers >= 0x80000000
The spans array is allocated in runtime_mallocinit.  On a
32-bit system the number of entries in the spans array is
MaxArena32 / PageSize, which (2U << 30) / (1 << 12) == (1 << 19).
So we are allocating an array that can hold 19 bits for an
index that can hold 20 bits.  According to the comment in the
function, this is intentional: we only allocate enough spans
(and bitmaps) for a 2G arena, because allocating more would
probably be wasteful.

But since the span index is simply the upper 20 bits of the
memory address, this scheme only works if memory addresses are
limited to the low 2G of memory.  That would be OK if we were
careful to enforce it, but we're not.  What we are careful to
enforce, in functions like runtime_MHeap_SysAlloc, is that we
always return addresses between the heap's arena_start and
arena_start + MaxArena32.

We generally get away with it because we start allocating just
after the program end, so we only run into trouble with
programs that allocate a lot of memory, enough to get past
address 0x80000000.

This changes the code that computes a span index to subtract
arena_start on 32-bit systems just as we currently do on
64-bit systems.

From-SVN: r206501
2014-01-09 23:16:56 +00:00
..
arch.h
array.h
chan.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
cpuprof.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
defs.h
env_posix.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
getncpu-bsd.c
getncpu-irix.c
getncpu-linux.c
getncpu-none.c
getncpu-solaris.c
go-alloc.h
go-append.c runtime: Fix append of slice with elements of zero size. 2013-10-02 23:49:39 +00:00
go-assert-interface.c
go-assert.c
go-assert.h
go-breakpoint.c
go-byte-array-to-string.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
go-caller.c runtime: Update for change to libbacktrace library. 2013-11-19 15:02:27 +00:00
go-callers.c libgo: Avoid some cases of getting callers recursively. 2013-12-01 01:40:16 +00:00
go-can-convert-interface.c
go-cdiv.c compiler, runtime: Fix complex division of NaN / 0. 2013-10-09 22:31:15 +00:00
go-cgo.c
go-check-interface.c
go-construct-map.c
go-convert-interface.c
go-copy.c
go-defer.c runtime: Fix defer of unlock thread at program startup. 2013-12-12 20:13:58 +00:00
go-defer.h runtime: Fix defer of unlock thread at program startup. 2013-12-12 20:13:58 +00:00
go-deferred-recover.c
go-eface-compare.c
go-eface-val-compare.c
go-fieldtrack.c
go-getgoroot.c
go-int-array-to-string.c runtime: Fix handling of surrogate pairs in string([]rune). 2013-11-26 23:27:29 +00:00
go-int-to-string.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
go-interface-compare.c
go-interface-eface-compare.c
go-interface-val-compare.c
go-main.c
go-make-slice.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
go-map-delete.c
go-map-index.c
go-map-len.c
go-map-range.c
go-matherr.c
go-memcmp.c
go-nanotime.c
go-new-map.c
go-new.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
go-nosys.c runtime: Fix typo in dup3 fallback implementation. 2013-10-18 13:26:40 +00:00
go-now.c
go-panic.c runtime: Fix defer of unlock thread at program startup. 2013-12-12 20:13:58 +00:00
go-panic.h
go-print.c
go-recover.c compiler, reflect, runtime: Implement method values in reflect. 2013-12-12 01:08:52 +00:00
go-reflect-call.c reflect: Handle calls to functions that take or return empty structs 2013-11-19 02:30:03 +00:00
go-reflect-map.c
go-rune.c
go-runtime-error.c
go-setenv.c
go-signal.c runtime: Use pthread_sigmask instead of sigprocmask. 2013-12-04 01:35:53 +00:00
go-strcmp.c
go-string-to-byte-array.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
go-string-to-int-array.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
go-string.h
go-strplus.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
go-strslice.c
go-traceback.c
go-trampoline.c
go-type-complex.c
go-type-eface.c
go-type-error.c
go-type-float.c
go-type-identity.c
go-type-interface.c
go-type-string.c
go-type.h
go-typedesc-equal.c
go-typestring.c
go-unsafe-new.c
go-unsafe-newarray.c
go-unsafe-pointer.c
go-unwind.c runtime: Fix defer of unlock thread at program startup. 2013-12-12 20:13:58 +00:00
go-varargs.c syscall: Only call varargs libc functions from C code. 2013-11-24 02:38:28 +00:00
goc2c.c
iface.goc
interface.h
lfstack.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
lock_futex.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
lock_sema.c re PR go/59408 (Many Go tests FAIL with notesleep not on g0) 2013-12-06 18:26:27 +00:00
malloc.goc runtime: fix 32-bit malloc for pointers >= 0x80000000 2014-01-09 23:16:56 +00:00
malloc.h runtime: Add netpoll code that uses select. 2013-11-14 20:15:04 +00:00
map.goc
map.h
mcache.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
mcentral.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
mem_posix_memalign.c
mem.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
mfinal.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
mfixalloc.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
mgc0.c runtime: fix 32-bit malloc for pointers >= 0x80000000 2014-01-09 23:16:56 +00:00
mgc0.h libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
mheap.c runtime: fix 32-bit malloc for pointers >= 0x80000000 2014-01-09 23:16:56 +00:00
mprof.goc libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
msize.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
netpoll_epoll.c runtime: Add netpoll code that uses select. 2013-11-14 20:15:04 +00:00
netpoll_kqueue.c runtime: Add netpoll code that uses select. 2013-11-14 20:15:04 +00:00
netpoll_select.c re PR go/59433 (Many 64-bit Go tests SEGV on Solaris) 2014-01-08 00:42:45 +00:00
netpoll_stub.c runtime: Add netpoll code that uses select. 2013-11-14 20:15:04 +00:00
netpoll.goc libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
panic.c runtime: Fix defer of unlock thread at program startup. 2013-12-12 20:13:58 +00:00
parfor.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
print.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
proc.c runtime: Fix defer of unlock thread at program startup. 2013-12-12 20:13:58 +00:00
race.h libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
reflect.goc
rtems-task-variable-add.c
runtime1.goc
runtime.c runtime: Remove unused runtime_cpuid variables. 2014-01-06 03:01:58 +00:00
runtime.h runtime: Fix prototype and one use of runtime_traceback. 2013-12-03 14:51:07 +00:00
sema.goc libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
signal_unix.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
signal_unix.h
sigqueue.goc libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
string.goc libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
thread-linux.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
thread-sema.c
thread.c
time.goc libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
yield.c