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gcc/libgo/runtime
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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 compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
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 compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-assert.c
go-assert.h
go-breakpoint.c re PR go/46986 (Go is not supported on Darwin) 2013-01-24 19:44:23 +00:00
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 compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-cdiv.c compiler, runtime: Fix complex division of NaN / 0. 2013-10-09 22:31:15 +00:00
go-cgo.c runtime: Support cgo callbacks from threads started by C. 2013-07-23 20:26:09 +00:00
go-check-interface.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-construct-map.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-convert-interface.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
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 compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-eface-val-compare.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-fieldtrack.c re PR go/46986 (Go is not supported on Darwin) 2013-01-24 19:44:23 +00:00
go-getgoroot.c re PR go/46986 (Go is not supported on Darwin) 2013-01-24 19:44:23 +00:00
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 compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-interface-eface-compare.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-interface-val-compare.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-main.c libgo: Update to Go 1.1.1. 2013-07-16 06:54:42 +00:00
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 runtime: Delete from a nil map is now a no-op. 2012-12-12 23:29:10 +00:00
go-map-index.c libgo: Update to Go 1.1.1. 2013-07-16 06:54:42 +00:00
go-map-len.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-map-range.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-matherr.c
go-memcmp.c compiler, runtime: Memcmp routine returns intgo. 2012-11-06 18:12:45 +00:00
go-nanotime.c
go-new-map.c compiler, libgo: Fixes to prepare for 64-bit int. 2012-11-06 18:28:21 +00:00
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 re PR go/46986 (Go is not supported on Darwin) 2013-01-24 19:44:23 +00:00
go-panic.c runtime: Fix defer of unlock thread at program startup. 2013-12-12 20:13:58 +00:00
go-panic.h compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-print.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
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 libgo: Update to Go 1.1.1. 2013-07-16 06:54:42 +00:00
go-rune.c compiler, libgo: Fixes to prepare for 64-bit int. 2012-11-06 18:28:21 +00:00
go-runtime-error.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-setenv.c libgo: Update Go library to master revision 15489/921e53d4863c. 2013-01-29 20:52:43 +00:00
go-signal.c runtime: Use pthread_sigmask instead of sigprocmask. 2013-12-04 01:35:53 +00:00
go-strcmp.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
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 compiler, libgo: Fixes to prepare for 64-bit int. 2012-11-06 18:28:21 +00:00
go-strplus.c libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
go-strslice.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-traceback.c runtime: In backtraces, get inline functions, skip split-stack fns. 2013-01-30 22:24:40 +00:00
go-trampoline.c libgo: Update to revision 15193:6fdc1974457c of master library. 2012-12-22 01:15:33 +00:00
go-type-complex.c
go-type-eface.c
go-type-error.c
go-type-float.c
go-type-identity.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-type-interface.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-type-string.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-type.h compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-typedesc-equal.c compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
go-typestring.c re PR go/46986 (Go is not supported on Darwin) 2013-01-24 19:44:23 +00:00
go-unsafe-new.c libgo: Update to Go 1.1.1. 2013-07-16 06:54:42 +00:00
go-unsafe-newarray.c libgo: Update to Go 1.1.1. 2013-07-16 06:54:42 +00:00
go-unsafe-pointer.c re PR go/46986 (Go is not supported on Darwin) 2013-01-24 19:44:23 +00:00
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 runtime: Change main in goc2c to return int. 2013-02-07 22:24:34 +00:00
iface.goc
interface.h compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
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 compiler, runtime: More steps toward separating int and intgo. 2012-11-01 03:02:13 +00:00
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 libgo: Update to Go 1.1.1. 2013-07-16 06:54:42 +00:00
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 libgo: Update to Go 1.1.1. 2013-07-16 06:54:42 +00:00
time.goc libgo: Update to October 24 version of master library. 2013-11-06 19:49:01 +00:00
yield.c