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runtime: don't use MAP_STACK in SigStack test

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On DragonFly mmap with MAP_STACK returns the top of the region, not
the bottom. Rather than try to cope, just don't use the flag anywhere.

Fixes #23061

Change-Id: Ib5df4dd7c934b3efecfc4bc87f8989b4c37555d7
Reviewed-on: https://go-review.googlesource.com/83035
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Ian Lance Taylor 2017-12-08 16:05:22 -08:00 committed by Brad Fitzpatrick
parent 840fad13ec
commit 29cb57c5bd
1 changed files with 1 additions and 5 deletions
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6
src/runtime/testdata/testprogcgo/sigstack.go vendored
View File

@ -17,15 +17,11 @@ package main
#include <stdlib.h>
#include <sys/mman.h>
#ifndef MAP_STACK
#define MAP_STACK 0
#endif
extern void SigStackCallback();
static void* WithSigStack(void* arg __attribute__((unused))) {
// Set up an alternate system stack.
void* base = mmap(0, SIGSTKSZ, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON|MAP_STACK, -1, 0);
void* base = mmap(0, SIGSTKSZ, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
if (base == MAP_FAILED) {
perror("mmap failed");
abort();