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| author | Andrew Cooper <andrew.cooper3@citrix.com> | 2013-08-27 11:28:26 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-08-27 11:28:26 +0200 |
| commit | 8a3c4acc9907cfec9aae9f1bc251fbf50af6828e (patch) | |
| tree | 3e93a1da7124e4538579b65a894106e9ba0e01e0 /xen/arch/x86/smpboot.c | |
| parent | 483814219bc4d47db8a56116290ec7878b794c09 (diff) | |
| download | xen-8a3c4acc9907cfec9aae9f1bc251fbf50af6828e.tar.gz xen-8a3c4acc9907cfec9aae9f1bc251fbf50af6828e.tar.bz2 xen-8a3c4acc9907cfec9aae9f1bc251fbf50af6828e.zip | |
x86/boot: Explicitly clean pcpu stacks in debug builds
This reduces confusion when looking at a hexdump of the pcpu stacks and
wondering were on earth some of the junk was coming from. Also leave some
grep fodder for finding where the BSP switches stack (because it took me
far longer to find than I care to admit to).
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Diffstat (limited to 'xen/arch/x86/smpboot.c')
| -rw-r--r-- | xen/arch/x86/smpboot.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c index 9f81c7ba62..8bfa151a40 100644 --- a/xen/arch/x86/smpboot.c +++ b/xen/arch/x86/smpboot.c @@ -659,6 +659,10 @@ static int cpu_smpboot_alloc(unsigned int cpu) stack_base[cpu] = alloc_xenheap_pages(STACK_ORDER, 0); if ( stack_base[cpu] == NULL ) goto oom; +#ifndef NDEBUG + for ( order = 0 ; order < (1<<STACK_ORDER); ++order ) + clear_page(stack_base[cpu] + order * PAGE_SIZE); +#endif memguard_guard_stack(stack_base[cpu]); order = get_order_from_pages(NR_RESERVED_GDT_PAGES); |