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Make signal handling work well across platforms

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- Fix sigsuspend() on XNU
- Fix strsignal() on non-Linux
- Add unit tests for strsignal()
- Add unit tests for setitimer()
- Add unit tests for sigsuspend()
- Rewrite setitimer() for New Technology
- Rewrite nanosleep() for New Technology
- Polyfill SIGALRM on the New Technology
- select(0,0,0,0) on NT now calls pause()
- Remove some NTDLL calls that aren't needed
- Polyfill SA_NOCLDWAIT on the New Technology
- Polyfill SA_RESETHAND on the New Technology
- Polyfill sigprocmask() on the New Technology
- Polyfill SIGCHLD+SIG_IGN on the New Technology
- Polyfill SA_RESTART masking on the New Technology
- Deliver console signals from main thread on New Technology
- Document SA_RESTART behavior w/ @sarestartable / @norestart
- System call trace in MODE=dbg now prints inherited FDs and signal mask
This commit is contained in:
Justine Tunney 2022-03-25 07:11:44 -07:00
parent 3b9e66ecba
commit 072e1d2910
82 changed files with 1388 additions and 450 deletions
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30
tool/build/strace.c
View file

@ -61,6 +61,7 @@
#define INTPTR 7
#define STAT 8
#define SIG 9
#define SIGSET 10
#define OCTAL 0x80
static const struct Syscall {
@ -87,15 +88,19 @@ static const struct Syscall {
{&__NR_msync, "msync", 3, INT, {PTR, ULONG, INT}},
{&__NR_mprotect, "mprotect", 3, INT, {PTR, ULONG, INT}},
{&__NR_munmap, "munmap", 2, INT, {PTR, ULONG}},
{&__NR_sigaction, "sigaction", 4, INT, {SIG}},
{&__NR_sigprocmask, "sigprocmask", 3, INT},
{&__NR_sigaction, "rt_sigaction", 4, INT, {SIG}},
{&__NR_sigprocmask, "rt_sigprocmask", 4, INT, {INT, SIGSET, SIGSET, LONG}},
{&__NR_sigpending, "rt_sigpending", 2, INT, {SIGSET, LONG}},
{&__NR_sigsuspend, "rt_sigsuspend", 2, INT, {SIGSET, LONG}},
{&__NR_rt_sigqueueinfo, "rt_sigqueueinfo", 6},
{&__NR_ioctl, "ioctl", 3, INT, {INT, ULONG, ULONG}},
{&__NR_pread, "pread", 4, LONG, {INT, BUF, ULONG, ULONG}},
{&__NR_pwrite, "pwrite", 4, LONG, {INT, BUF, ULONG, ULONG}},
{&__NR_pread, "pread64", 4, LONG, {INT, BUF, ULONG, ULONG}},
{&__NR_pwrite, "pwrite64", 4, LONG, {INT, BUF, ULONG, ULONG}},
{&__NR_readv, "readv", 3, LONG, {INT, IOV, INT}},
{&__NR_writev, "writev", 3, LONG, {INT, IOV, INT}},
{&__NR_access, "access", 2, INT, {STR, OCTAL|INT}},
{&__NR_pipe, "pipe", 1, INT},
{&__NR_pipe2, "pipe2", 2, INT},
{&__NR_select, "select", 5},
{&__NR_pselect, "pselect", 6},
{&__NR_pselect6, "pselect6", 6},
@ -201,8 +206,6 @@ static const struct Syscall {
{&__NR_setresgid, "setresgid", 6},
{&__NR_getresuid, "getresuid", 6},
{&__NR_getresgid, "getresgid", 6},
{&__NR_sigpending, "sigpending", 6},
{&__NR_sigsuspend, "sigsuspend", 6},
{&__NR_sigaltstack, "sigaltstack", 6},
{&__NR_mknod, "mknod", 6},
{&__NR_mknodat, "mknodat", 6},
@ -229,7 +232,6 @@ static const struct Syscall {
{&__NR_capget, "capget", 6},
{&__NR_capset, "capset", 6},
{&__NR_sigtimedwait, "sigtimedwait", 6},
{&__NR_rt_sigqueueinfo, "rt_sigqueueinfo", 6},
{&__NR_personality, "personality", 6},
{&__NR_ustat, "ustat", 6},
{&__NR_sysfs, "sysfs", 6},
@ -283,7 +285,7 @@ static const struct Syscall {
{&__NR_epoll_create, "epoll_create", 6},
{&__NR_epoll_wait, "epoll_wait", 6},
{&__NR_epoll_ctl, "epoll_ctl", 6},
{&__NR_getdents, "getdents", 6},
{&__NR_getdents, "getdents64", 6},
{&__NR_set_tid_address, "set_tid_address", 1},
{&__NR_restart_syscall, "restart_syscall", 6},
{&__NR_semtimedop, "semtimedop", 6},
@ -325,7 +327,7 @@ static const struct Syscall {
{&__NR_futimesat, "futimesat", 6},
{&__NR_futimes, "futimes", 6},
{&__NR_futimens, "futimens", 6},
{&__NR_fstatat, "fstatat", 4, INT, {INT, STR, STAT, INT}},
{&__NR_fstatat, "newfstatat", 4, INT, {INT, STR, STAT, INT}},
{&__NR_unlinkat, "unlinkat", 3, INT, {INT, STR, INT}},
{&__NR_renameat, "renameat", 4, INT, {INT, STR, INT, STR}},
{&__NR_linkat, "linkat", 6},
@ -347,7 +349,6 @@ static const struct Syscall {
{&__NR_posix_fallocate, "posix_fallocate", 6},
{&__NR_accept4, "accept4", 4},
{&__NR_dup3, "dup3", 3, INT},
{&__NR_pipe2, "pipe2", 2},
{&__NR_epoll_pwait, "epoll_pwait", 6},
{&__NR_epoll_create1, "epoll_create1", 6},
{&__NR_perf_event_open, "perf_event_open", 6},
@ -613,7 +614,7 @@ static char *PrintString(char *s) {
return s;
}
static char *PeekData(unsigned long x, size_t size) {
static void *PeekData(unsigned long x, size_t size) {
union {
char buf[8];
long word;
@ -760,6 +761,10 @@ static struct stat *PrintStat(struct stat *st) {
return st;
}
static void PrintSigset(unsigned long p) {
kappendf(&ob, "{%#lx}", ptrace(PTRACE_PEEKTEXT, sp->pid, p));
}
static void PrintSyscallArg(int type, unsigned long x, unsigned long y) {
char *s;
switch (type & 31) {
@ -791,6 +796,9 @@ static void PrintSyscallArg(int type, unsigned long x, unsigned long y) {
case SIG:
appends(&ob, strsignal(x));
break;
case SIGSET:
PrintSigset(x);
break;
case STRLIST:
FreeStringList(PrintStringList(PeekStringList(x)));
break;