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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2011-11-01 04:55:15 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2011-11-01 04:55:15 +0000 |
| commit | 3d4339609875e273966ffab5b76526a0bf07963d (patch) | |
| tree | 5d35e97f65efa83ed31a6a591452049c0b193422 /libgo | |
| parent | 207c35fa9ee1cde68cb992aa2525d96fa86d1f20 (diff) | |
| download | gcc-3d4339609875e273966ffab5b76526a0bf07963d.zip gcc-3d4339609875e273966ffab5b76526a0bf07963d.tar.gz gcc-3d4339609875e273966ffab5b76526a0bf07963d.tar.bz2 | |
runtime: Correct test of mmap return value.
From-SVN: r180731
Diffstat (limited to 'libgo')
| -rw-r--r-- | libgo/runtime/mem.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libgo/runtime/mem.c b/libgo/runtime/mem.c index 4267c55..4e1103e 100644 --- a/libgo/runtime/mem.c +++ b/libgo/runtime/mem.c @@ -85,6 +85,7 @@ void* runtime_SysReserve(void *v, uintptr n) { int fd = -1; + void *p; // On 64-bit, people with ulimit -v set complain if we reserve too // much address space. Instead, assume that the reservation is okay @@ -103,7 +104,11 @@ runtime_SysReserve(void *v, uintptr n) fd = dev_zero; #endif - return runtime_mmap(v, n, PROT_NONE, MAP_ANON|MAP_PRIVATE, fd, 0); + p = runtime_mmap(v, n, PROT_NONE, MAP_ANON|MAP_PRIVATE, fd, 0); + if((uintptr)p < 4096 || -(uintptr)p < 4096) { + return nil; + } + return p; } void |