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strace/process.c
Dmitry V. Levin d6c71dd061 Fix preprocessor indentation 
Indent the C preprocessor directives to reflect their nesting
using the following script:

$ cppi -l $(git grep -El '^[[:space:]]*#[[:space:]]*(if|ifdef|ifndef|elif|else|endif|define|pragma)[[:space:]]' |grep -v '\.sh$') |while read f; do
	cppi < "$f" > "$f".cppi; mv "$f".cppi "$f"
done
2018-12-30 15:35:21 +00:00

297 lines
6.7 KiB
C
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/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Linux for s390 port by D.J. Barrow
* <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
* Copyright (c) 2000 PocketPenguins Inc. Linux for Hitachi SuperH
* port by Greg Banks <gbanks@pocketpenguins.com>
* Copyright (c) 1999-2018 The strace developers.
*
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#ifdef HAVE_ELF_H
# include <elf.h>
#endif
#include "ptrace.h"
#include "ptrace_syscall_info.h"
#include "regs.h"
#include "xlat/nt_descriptor_types.h"
#include "xlat/ptrace_cmds.h"
#include "xlat/ptrace_setoptions_flags.h"
#include "xlat/ptrace_peeksiginfo_flags.h"
#define uoff(member) offsetof(struct user, member)
#define XLAT_UOFF(member) { uoff(member), "offsetof(struct user, " #member ")" }
static const struct xlat struct_user_offsets[] = {
#include "userent.h"
XLAT_END
};
static void
print_user_offset_addr(const kernel_ulong_t addr)
{
bool no_str = false;
const struct xlat *x;
for (x = struct_user_offsets; x->str; ++x) {
if (x->val >= addr)
break;
}
if (!x->str || (x == struct_user_offsets && x->val > addr))
no_str = true;
if (no_str || xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV)
printaddr(addr);
if (no_str || xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
return;
if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE)
tprints(" /* ");
if (x->val > addr) {
--x;
tprintf("%s + %" PRI_klu,
x->str, addr - (kernel_ulong_t) x->val);
} else {
tprints(x->str);
}
if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE)
tprints(" */");
}
SYS_FUNC(ptrace)
{
const kernel_ulong_t request = tcp->u_arg[0];
const int pid = tcp->u_arg[1];
const kernel_ulong_t addr = tcp->u_arg[2];
const kernel_ulong_t data = tcp->u_arg[3];
if (entering(tcp)) {
/* request */
printxval64(ptrace_cmds, request, "PTRACE_???");
if (request == PTRACE_TRACEME) {
/* pid, addr, and data are ignored. */
return RVAL_DECODED;
}
/* pid */
tprintf(", %d", pid);
/* addr */
switch (request) {
case PTRACE_ATTACH:
case PTRACE_INTERRUPT:
case PTRACE_KILL:
case PTRACE_LISTEN:
/* addr and data are ignored */
return RVAL_DECODED;
case PTRACE_PEEKUSER:
case PTRACE_POKEUSER:
tprints(", ");
print_user_offset_addr(addr);
break;
case PTRACE_GETREGSET:
case PTRACE_SETREGSET:
tprints(", ");
printxval(nt_descriptor_types, addr, "NT_???");
break;
case PTRACE_GETSIGMASK:
case PTRACE_SETSIGMASK:
case PTRACE_SECCOMP_GET_FILTER:
case PTRACE_SECCOMP_GET_METADATA:
case PTRACE_GET_SYSCALL_INFO:
tprintf(", %" PRI_klu, addr);
break;
case PTRACE_PEEKSIGINFO: {
tprints(", ");
struct {
uint64_t off;
uint32_t flags;
uint32_t nr;
} psi;
if (umove_or_printaddr(tcp, addr, &psi)) {
tprints(", ");
printaddr(data);
return RVAL_DECODED;
}
tprintf("{off=%" PRIu64 ", flags=", psi.off);
printflags(ptrace_peeksiginfo_flags, psi.flags,
"PTRACE_PEEKSIGINFO_???");
tprintf(", nr=%u}", psi.nr);
break;
}
default:
tprints(", ");
printaddr(addr);
}
#if defined IA64 || defined SPARC || defined SPARC64
switch (request) {
# ifdef IA64
case PTRACE_PEEKDATA:
case PTRACE_PEEKTEXT:
case PTRACE_PEEKUSER:
/* data is ignored */
return RVAL_DECODED | RVAL_HEX;
# endif /* IA64 */
# if defined SPARC || defined SPARC64
case PTRACE_GETREGS:
case PTRACE_SETREGS:
case PTRACE_GETFPREGS:
case PTRACE_SETFPREGS:
/* data is ignored */
return RVAL_DECODED;
# endif /* SPARC || SPARC64 */
}
#endif /* IA64 || SPARC || SPARC64 */
tprints(", ");
/* data */
switch (request) {
case PTRACE_CONT:
case PTRACE_DETACH:
case PTRACE_SYSCALL:
#ifdef PTRACE_SINGLESTEP
case PTRACE_SINGLESTEP:
#endif
#ifdef PTRACE_SINGLEBLOCK
case PTRACE_SINGLEBLOCK:
#endif
#ifdef PTRACE_SYSEMU
case PTRACE_SYSEMU:
#endif
#ifdef PTRACE_SYSEMU_SINGLESTEP
case PTRACE_SYSEMU_SINGLESTEP:
#endif
printsignal(data);
break;
case PTRACE_SEIZE:
case PTRACE_SETOPTIONS:
#ifdef PTRACE_OLDSETOPTIONS
case PTRACE_OLDSETOPTIONS:
#endif
printflags64(ptrace_setoptions_flags, data, "PTRACE_O_???");
break;
case PTRACE_SETSIGINFO:
printsiginfo_at(tcp, data);
break;
case PTRACE_SETSIGMASK:
print_sigset_addr_len(tcp, data, addr);
break;
case PTRACE_SETREGSET:
tprint_iov(tcp, /*len:*/ 1, data, IOV_DECODE_ADDR);
break;
case PTRACE_SECCOMP_GET_METADATA:
if (verbose(tcp)) {
uint64_t filter_off;
if (addr < sizeof(filter_off) ||
umove(tcp, data, &filter_off)) {
printaddr(data);
return RVAL_DECODED;
}
tprintf("{filter_off=%" PRIu64, filter_off);
return 0;
}
printaddr(data);
break;
#ifndef IA64
case PTRACE_PEEKDATA:
case PTRACE_PEEKTEXT:
case PTRACE_PEEKUSER:
#endif
case PTRACE_GETEVENTMSG:
case PTRACE_GETREGSET:
case PTRACE_GETSIGINFO:
case PTRACE_GETSIGMASK:
case PTRACE_PEEKSIGINFO:
case PTRACE_SECCOMP_GET_FILTER:
case PTRACE_GET_SYSCALL_INFO:
if (verbose(tcp)) {
/* print data on exiting syscall */
return 0;
}
ATTRIBUTE_FALLTHROUGH;
default:
printaddr(data);
break;
}
return RVAL_DECODED;
} else {
switch (request) {
#ifndef IA64
case PTRACE_PEEKDATA:
case PTRACE_PEEKTEXT:
case PTRACE_PEEKUSER:
printnum_ptr(tcp, data);
break;
#endif
case PTRACE_GETEVENTMSG:
printnum_ulong(tcp, data);
break;
case PTRACE_GETREGSET:
tprint_iov(tcp, /*len:*/ 1, data, IOV_DECODE_ADDR);
break;
case PTRACE_GETSIGINFO:
printsiginfo_at(tcp, data);
break;
case PTRACE_GETSIGMASK:
print_sigset_addr_len(tcp, data, addr);
break;
case PTRACE_PEEKSIGINFO:
print_siginfo_array(tcp, data, tcp->u_rval);
break;
case PTRACE_SECCOMP_GET_FILTER:
print_seccomp_fprog(tcp, data, tcp->u_rval);
break;
case PTRACE_SECCOMP_GET_METADATA: {
const size_t offset = sizeof(uint64_t);
uint64_t flags = 0;
size_t ret_size = MIN((kernel_ulong_t) tcp->u_rval,
offset + sizeof(flags));
if (syserror(tcp) || ret_size <= offset) {
tprints("}");
return 0;
}
if (umoven(tcp, data + offset, ret_size - offset,
&flags)) {
tprints(", ...}");
return 0;
}
tprints(", flags=");
printflags64(seccomp_filter_flags, flags,
"SECCOMP_FILTER_FLAG_???");
if ((kernel_ulong_t) tcp->u_rval > ret_size)
tprints(", ...");
tprints("}");
break;
}
case PTRACE_GET_SYSCALL_INFO:
print_ptrace_syscall_info(tcp, data, addr);
break;
}
}
return 0;
}
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