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strace: fix revents output for poll syscall

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each poll_fd struct should be checked, valid when not -1 and revents not zero.

Change-Id: Ia624ad1369ad1a6066c9970a47cfac63fa773702
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4821
Reviewed-by: waddlesplash <[email protected]>
This commit is contained in:
Jérôme Duval
2021-12-17 20:40:55 +00:00
committed by waddlesplash
parent 3285dcae22
commit 101dc0ba83
1 changed files with 6 additions and 6 deletions
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src/bin/debug/strace/NetworkTypes.cpp
+6 -6
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@@ -134,11 +134,7 @@ format_signed_number(int32 value)
static string
read_pollfd(Context &context, void *data)
{
nfds_t numfds = 0;
if (context.GetContents(Context::INPUT_VALUES))
numfds = get_value<nfds_t>(context.GetValue(context.GetSibling(1)));
else if (context.GetContents(Context::OUTPUT_VALUES))
numfds = context.GetReturnValue();
nfds_t numfds = get_value<nfds_t>(context.GetValue(context.GetSibling(1)));
if ((int64)numfds <= 0)
return string();
@@ -157,6 +153,10 @@ read_pollfd(Context &context, void *data)
r = "[";
for (nfds_t i = 0; i < numfds && added < 8; i++) {
if ((tmp[i].fd == -1 || tmp[i].revents == 0)
&& context.GetContents(Context::OUTPUT_VALUES)) {
continue;
}
if (added > 0)
r += ", ";
r += "{fd=" + format_signed_number(tmp[i].fd);
@@ -176,7 +176,7 @@ read_pollfd(Context &context, void *data)
flags++;
}
}
if (tmp[i].fd != -1 && context.GetContents(Context::OUTPUT_VALUES)) {
if (context.GetContents(Context::OUTPUT_VALUES)) {
r += ", revents=";
int flags = 0;
if ((tmp[i].revents & POLLIN) != 0) {