diff options
Diffstat (limited to 'ptrace/peeksiginfo.c')
| -rw-r--r-- | ptrace/peeksiginfo.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/ptrace/peeksiginfo.c b/ptrace/peeksiginfo.c deleted file mode 100644 index d46558b..0000000 --- a/ptrace/peeksiginfo.c +++ /dev/null @@ -1,214 +0,0 @@ -#define _GNU_SOURCE -#include <stdio.h> -#include <signal.h> -#include <unistd.h> -#include <errno.h> -#include <linux/types.h> -#include <sys/wait.h> -#include <sys/syscall.h> -#include <sys/user.h> -#include <sys/mman.h> - -#include "linux/ptrace.h" - -static int sys_rt_sigqueueinfo(pid_t tgid, int sig, siginfo_t *uinfo) -{ - return syscall(SYS_rt_sigqueueinfo, tgid, sig, uinfo); -} - -static int sys_rt_tgsigqueueinfo(pid_t tgid, pid_t tid, - int sig, siginfo_t *uinfo) -{ - return syscall(SYS_rt_tgsigqueueinfo, tgid, tid, sig, uinfo); -} - -static int sys_ptrace(int request, pid_t pid, void *addr, void *data) -{ - return syscall(SYS_ptrace, request, pid, addr, data); -} - -#define SIGNR 10 -#define TEST_SICODE_PRIV -1 -#define TEST_SICODE_SHARE -2 - -#define err(fmt, ...) \ - fprintf(stderr, \ - "Error (%s:%d): " fmt, \ - __FILE__, __LINE__, ##__VA_ARGS__) - -static int check_error_paths(pid_t child) -{ - struct ptrace_peeksiginfo_args arg; - int ret, exit_code = -1; - void *addr_rw, *addr_ro; - - /* - * Allocate two contiguous pages. The first one is for read-write, - * another is for read-only. - */ - addr_rw = mmap(NULL, 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if (addr_rw == MAP_FAILED) { - err("mmap() failed: %m\n"); - return 1; - } - - addr_ro = mmap(addr_rw + PAGE_SIZE, PAGE_SIZE, PROT_READ, - MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0); - if (addr_ro == MAP_FAILED) { - err("mmap() failed: %m\n"); - goto out; - } - - arg.nr = SIGNR; - arg.off = 0; - - /* Unsupported flags */ - arg.flags = ~0; - ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, addr_rw); - if (ret != -1 || errno != EINVAL) { - err("sys_ptrace() returns %d (expected -1)," - " errno %d (expected %d): %m\n", - ret, errno, EINVAL); - goto out; - } - arg.flags = 0; - - /* A part of the buffer is read-only */ - ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, - addr_ro - sizeof(siginfo_t) * 2); - if (ret != 2) { - err("sys_ptrace() returns %d (expected 2): %m\n", ret); - goto out; - } - - /* Read-only buffer */ - ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, addr_ro); - if (ret != -1 && errno != EFAULT) { - err("sys_ptrace() returns %d (expected -1)," - " errno %d (expected %d): %m\n", - ret, errno, EFAULT); - goto out; - } - - exit_code = 0; -out: - munmap(addr_rw, 2 * PAGE_SIZE); - return exit_code; -} - -int check_direct_path(pid_t child, int shared, int nr) -{ - struct ptrace_peeksiginfo_args arg = {.flags = 0, .nr = nr, .off = 0}; - int i, j, ret, exit_code = -1; - siginfo_t siginfo[SIGNR]; - int si_code; - - if (shared == 1) { - arg.flags = PTRACE_PEEKSIGINFO_SHARED; - si_code = TEST_SICODE_SHARE; - } else { - arg.flags = 0; - si_code = TEST_SICODE_PRIV; - } - - for (i = 0; i < SIGNR; ) { - arg.off = i; - ret = sys_ptrace(PTRACE_PEEKSIGINFO, child, &arg, siginfo); - if (ret == -1) { - err("ptrace() failed: %m\n"); - goto out; - } - - if (ret == 0) - break; - - for (j = 0; j < ret; j++, i++) { - if (siginfo[j].si_code == si_code && - siginfo[j].si_int == i) - continue; - - err("%d: Wrong siginfo i=%d si_code=%d si_int=%d\n", - shared, i, siginfo[j].si_code, siginfo[j].si_int); - goto out; - } - } - - if (i != SIGNR) { - err("Only %d signals were read\n", i); - goto out; - } - - exit_code = 0; -out: - return exit_code; -} - -int main(int argc, char *argv[]) -{ - siginfo_t siginfo[SIGNR]; - int i, exit_code = 1; - sigset_t blockmask; - pid_t child; - - sigemptyset(&blockmask); - sigaddset(&blockmask, SIGRTMIN); - sigprocmask(SIG_BLOCK, &blockmask, NULL); - - child = fork(); - if (child == -1) { - err("fork() failed: %m"); - return 1; - } else if (child == 0) { - pid_t ppid = getppid(); - while (1) { - if (ppid != getppid()) - break; - sleep(1); - } - return 1; - } - - /* Send signals in process-wide and per-thread queues */ - for (i = 0; i < SIGNR; i++) { - siginfo->si_code = TEST_SICODE_SHARE; - siginfo->si_int = i; - sys_rt_sigqueueinfo(child, SIGRTMIN, siginfo); - - siginfo->si_code = TEST_SICODE_PRIV; - siginfo->si_int = i; - sys_rt_tgsigqueueinfo(child, child, SIGRTMIN, siginfo); - } - - if (sys_ptrace(PTRACE_ATTACH, child, NULL, NULL) == -1) - return 1; - - waitpid(child, NULL, 0); - - /* Dump signals one by one*/ - if (check_direct_path(child, 0, 1)) - goto out; - /* Dump all signals for one call */ - if (check_direct_path(child, 0, SIGNR)) - goto out; - - /* - * Dump signal from the process-wide queue. - * The number of signals is not multible to the buffer size - */ - if (check_direct_path(child, 1, 3)) - goto out; - - if (check_error_paths(child)) - goto out; - - printf("PASS\n"); - exit_code = 0; -out: - if (sys_ptrace(PTRACE_KILL, child, NULL, NULL) == -1) - return 1; - - waitpid(child, NULL, 0); - - return exit_code; -} |