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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
#include <test_progs.h>
#include <sys/mman.h>
#include "stream.skel.h"
#include "stream_fail.skel.h"
void test_stream_failure(void)
{
RUN_TESTS(stream_fail);
}
void test_stream_success(void)
{
RUN_TESTS(stream);
return;
}
void test_stream_syscall(void)
{
LIBBPF_OPTS(bpf_test_run_opts, opts);
LIBBPF_OPTS(bpf_prog_stream_read_opts, ropts);
struct stream *skel;
int ret, prog_fd;
char buf[64];
skel = stream__open_and_load();
if (!ASSERT_OK_PTR(skel, "stream__open_and_load"))
return;
prog_fd = bpf_program__fd(skel->progs.stream_syscall);
ret = bpf_prog_test_run_opts(prog_fd, &opts);
ASSERT_OK(ret, "ret");
ASSERT_OK(opts.retval, "retval");
ASSERT_LT(bpf_prog_stream_read(0, BPF_STREAM_STDOUT, buf, sizeof(buf), &ropts), 0, "error");
ret = -errno;
ASSERT_EQ(ret, -EINVAL, "bad prog_fd");
ASSERT_LT(bpf_prog_stream_read(prog_fd, 0, buf, sizeof(buf), &ropts), 0, "error");
ret = -errno;
ASSERT_EQ(ret, -ENOENT, "bad stream id");
ASSERT_LT(bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, NULL, sizeof(buf), NULL), 0, "error");
ret = -errno;
ASSERT_EQ(ret, -EFAULT, "bad stream buf");
ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, 2, NULL);
ASSERT_EQ(ret, 2, "bytes");
ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, 2, NULL);
ASSERT_EQ(ret, 1, "bytes");
ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, 1, &ropts);
ASSERT_EQ(ret, 0, "no bytes stdout");
ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDERR, buf, 1, &ropts);
ASSERT_EQ(ret, 0, "no bytes stderr");
stream__destroy(skel);
}
static void test_address(struct bpf_program *prog, unsigned long *fault_addr_p)
{
LIBBPF_OPTS(bpf_test_run_opts, opts);
LIBBPF_OPTS(bpf_prog_stream_read_opts, ropts);
int ret, prog_fd;
char fault_addr[64];
char buf[1024];
prog_fd = bpf_program__fd(prog);
ret = bpf_prog_test_run_opts(prog_fd, &opts);
ASSERT_OK(ret, "ret");
ASSERT_OK(opts.retval, "retval");
sprintf(fault_addr, "0x%lx", *fault_addr_p);
ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDERR, buf, sizeof(buf), &ropts);
ASSERT_GT(ret, 0, "stream read");
ASSERT_LE(ret, 1023, "len for buf");
buf[ret] = '\0';
if (!ASSERT_HAS_SUBSTR(buf, fault_addr, "fault_addr")) {
fprintf(stderr, "Output from stream:\n%s\n", buf);
fprintf(stderr, "Fault Addr: %s\n", fault_addr);
}
}
void test_stream_arena_fault_address(void)
{
struct stream *skel;
#if !defined(__x86_64__) && !defined(__aarch64__)
printf("%s:SKIP: arena fault reporting not supported\n", __func__);
test__skip();
return;
#endif
skel = stream__open_and_load();
if (!ASSERT_OK_PTR(skel, "stream__open_and_load"))
return;
if (test__start_subtest("read_fault"))
test_address(skel->progs.stream_arena_read_fault, &skel->bss->fault_addr);
if (test__start_subtest("write_fault"))
test_address(skel->progs.stream_arena_write_fault, &skel->bss->fault_addr);
stream__destroy(skel);
}
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