[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v5 03/17] xenctx: Add -n (--display-stack-pages) option to output larger stack
From: Don Slutz <Don@xxxxxxxxxxxxxxx> Important: This is the stack size to display not the configured stack size. Note: use with caution (easy to get garbage). Below is various pictures of a configured 3 page stack, and where the SP currently is. Each box is a page. +------------------+ | | | | | | | | | | +------------------+ | | | | | | | | | | +------------------+ | | | | | | SP --> | | | | +------------------+ Display using "-n 1" since the used stack pages is 1. +------------------+ | | | | | | | | | | +------------------+ | | SP --> | | | | | | | | +------------------+ | | | | | | | | | | +------------------+ Display using "-n 2" since the used stack pages is 2. +------------------+ | | | | | | | | SP --> | | +------------------+ | | | | | | | | | | +------------------+ | | | | | | | | | | +------------------+ Display using "-n 3" since the used stack pages is 3. Signed-off-by: Don Slutz <Don@xxxxxxxxxxxxxxx> --- v5: Adjust option to -n, --display-stack-pages. Adjust usage message. tools/xentrace/xenctx.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/tools/xentrace/xenctx.c b/tools/xentrace/xenctx.c index 42a47f3..caa8899 100644 --- a/tools/xentrace/xenctx.c +++ b/tools/xentrace/xenctx.c @@ -35,6 +35,7 @@ static struct xenctx { int frame_ptrs; int stack_trace; int disp_all; + int multiple_pages; int all_vcpus; int self_paused; xc_dominfo_t dominfo; @@ -664,6 +665,8 @@ static int print_stack(vcpu_guest_context_any_t *ctx, int vcpu, int width) stack_limit = ((stack_pointer(ctx) + XC_PAGE_SIZE) & ~((guest_word_t) XC_PAGE_SIZE - 1)); + if ( xenctx.multiple_pages > 1 ) + stack_limit += (xenctx.multiple_pages - 1) * XC_PAGE_SIZE; printf("\n"); printf("Stack:\n"); for (i=1; i<5 && stack < stack_limit; i++) { @@ -834,18 +837,22 @@ static void usage(void) kernel_start); printf(" -a, --all display more registers\n"); printf(" -C, --all-vcpus print info for all vcpus\n"); + printf(" -n PAGES, --display-stack-pages=PAGES\n"); + printf(" Display N pages from the stack pointer.\n"); + printf(" Note: use with caution (easy to get garbage).\n"); } int main(int argc, char **argv) { int ch; int ret; - static const char *sopts = "fs:hak:SC"; + static const char *sopts = "fs:hak:SCn:"; static const struct option lopts[] = { {"stack-trace", 0, NULL, 'S'}, {"symbol-table", 1, NULL, 's'}, {"frame-pointers", 0, NULL, 'f'}, {"kernel-start", 1, NULL, 'k'}, + {"display-stack-pages", 0, NULL, 'n'}, {"all", 0, NULL, 'a'}, {"all-vcpus", 0, NULL, 'C'}, {"help", 0, NULL, 'h'}, @@ -869,6 +876,9 @@ int main(int argc, char **argv) case 'a': xenctx.disp_all = 1; break; + case 'n': + xenctx.multiple_pages = strtol(optarg, NULL, 0); + break; case 'C': xenctx.all_vcpus = 1; break; -- 1.8.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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