6 #include <linux/types.h>
8 #include <sys/syscall.h>
12 #include "linux/ptrace.h"
14 static int sys_rt_sigqueueinfo(pid_t tgid, int sig, siginfo_t *uinfo)
16 return syscall(SYS_rt_sigqueueinfo, tgid, sig, uinfo);
19 static int sys_rt_tgsigqueueinfo(pid_t tgid, pid_t tid,
20 int sig, siginfo_t *uinfo)
22 return syscall(SYS_rt_tgsigqueueinfo, tgid, tid, sig, uinfo);
25 static int sys_ptrace(int request, pid_t pid, void *addr, void *data)
27 return syscall(SYS_ptrace, request, pid, addr, data);
31 #define TEST_SICODE_PRIV -1
32 #define TEST_SICODE_SHARE -2
35 #define PAGE_SIZE sysconf(_SC_PAGESIZE)
38 #define err(fmt, ...) \
40 "Error (%s:%d): " fmt, \
41 __FILE__, __LINE__, ##__VA_ARGS__)
43 static int check_error_paths(pid_t child)
45 struct ptrace_peeksiginfo_args arg;
46 int ret, exit_code = -1;
47 void *addr_rw, *addr_ro;
50 * Allocate two contiguous pages. The first one is for read-write,
51 * another is for read-only.
53 addr_rw = mmap(NULL, 2 * PAGE_SIZE, PROT_READ | PROT_WRITE,
54 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
55 if (addr_rw == MAP_FAILED) {
56 err("mmap() failed: %m\n");
60 addr_ro = mmap(addr_rw + PAGE_SIZE, PAGE_SIZE, PROT_READ,
61 MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
62 if (addr_ro == MAP_FAILED) {
63 err("mmap() failed: %m\n");
70 /* Unsupported flags */
72 ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, addr_rw);
73 if (ret != -1 || errno != EINVAL) {
74 err("sys_ptrace() returns %d (expected -1),"
75 " errno %d (expected %d): %m\n",
81 /* A part of the buffer is read-only */
82 ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg,
83 addr_ro - sizeof(siginfo_t) * 2);
85 err("sys_ptrace() returns %d (expected 2): %m\n", ret);
89 /* Read-only buffer */
90 ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, addr_ro);
91 if (ret != -1 && errno != EFAULT) {
92 err("sys_ptrace() returns %d (expected -1),"
93 " errno %d (expected %d): %m\n",
100 munmap(addr_rw, 2 * PAGE_SIZE);
104 int check_direct_path(pid_t child, int shared, int nr)
106 struct ptrace_peeksiginfo_args arg = {.flags = 0, .nr = nr, .off = 0};
107 int i, j, ret, exit_code = -1;
108 siginfo_t siginfo[SIGNR];
112 arg.flags = PTRACE_PEEKSIGINFO_SHARED;
113 si_code = TEST_SICODE_SHARE;
116 si_code = TEST_SICODE_PRIV;
119 for (i = 0; i < SIGNR; ) {
121 ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, siginfo);
123 err("ptrace() failed: %m\n");
130 for (j = 0; j < ret; j++, i++) {
131 if (siginfo[j].si_code == si_code &&
132 siginfo[j].si_int == i)
135 err("%d: Wrong siginfo i=%d si_code=%d si_int=%d\n",
136 shared, i, siginfo[j].si_code, siginfo[j].si_int);
142 err("Only %d signals were read\n", i);
151 int main(int argc, char *argv[])
153 siginfo_t siginfo[SIGNR];
154 int i, exit_code = 1;
158 sigemptyset(&blockmask);
159 sigaddset(&blockmask, SIGRTMIN);
160 sigprocmask(SIG_BLOCK, &blockmask, NULL);
164 err("fork() failed: %m");
166 } else if (child == 0) {
167 pid_t ppid = getppid();
169 if (ppid != getppid())
176 /* Send signals in process-wide and per-thread queues */
177 for (i = 0; i < SIGNR; i++) {
178 siginfo->si_code = TEST_SICODE_SHARE;
180 sys_rt_sigqueueinfo(child, SIGRTMIN, siginfo);
182 siginfo->si_code = TEST_SICODE_PRIV;
184 sys_rt_tgsigqueueinfo(child, child, SIGRTMIN, siginfo);
187 if (sys_ptrace(PTRACE_ATTACH, child, NULL, NULL) == -1)
190 waitpid(child, NULL, 0);
192 /* Dump signals one by one*/
193 if (check_direct_path(child, 0, 1))
195 /* Dump all signals for one call */
196 if (check_direct_path(child, 0, SIGNR))
200 * Dump signal from the process-wide queue.
201 * The number of signals is not multible to the buffer size
203 if (check_direct_path(child, 1, 3))
206 if (check_error_paths(child))
212 if (sys_ptrace(PTRACE_KILL, child, NULL, NULL) == -1)
215 waitpid(child, NULL, 0);