* 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) 1999-2017 The strace developers.
+ * Copyright (c) 1999-2018 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
*/
#include "defs.h"
-#include <sys/param.h>
+#include <limits.h>
#include <fcntl.h>
#include <stdarg.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
#ifdef HAVE_SYS_XATTR_H
# include <sys/xattr.h>
#endif
#include <sys/uio.h>
-#include <asm/unistd.h>
-#include "scno.h"
-#include "regs.h"
-#include "ptrace.h"
+#include "largefile_wrappers.h"
+#include "xlat.h"
+#include "xstring.h"
int
-string_to_uint_ex(const char *const str, char **const endptr,
- const unsigned int max_val, const char *const accepted_ending)
+ts_nz(const struct timespec *a)
{
- char *end;
- long val;
-
- if (!*str)
- return -1;
-
- errno = 0;
- val = strtol(str, &end, 10);
-
- if (str == end || val < 0 || (unsigned long) val > max_val
- || (val == LONG_MAX && errno == ERANGE))
- return -1;
-
- if (*end && (!accepted_ending || !strchr(accepted_ending, *end)))
- return -1;
-
- if (endptr)
- *endptr = end;
-
- return (int) val;
+ return a->tv_sec || a->tv_nsec;
}
int
-string_to_uint(const char *const str)
-{
- return string_to_uint_upto(str, INT_MAX);
-}
-
-int
-tv_nz(const struct timeval *a)
-{
- return a->tv_sec || a->tv_usec;
-}
-
-int
-tv_cmp(const struct timeval *a, const struct timeval *b)
+ts_cmp(const struct timespec *a, const struct timespec *b)
{
if (a->tv_sec < b->tv_sec
- || (a->tv_sec == b->tv_sec && a->tv_usec < b->tv_usec))
+ || (a->tv_sec == b->tv_sec && a->tv_nsec < b->tv_nsec))
return -1;
if (a->tv_sec > b->tv_sec
- || (a->tv_sec == b->tv_sec && a->tv_usec > b->tv_usec))
+ || (a->tv_sec == b->tv_sec && a->tv_nsec > b->tv_nsec))
return 1;
return 0;
}
double
-tv_float(const struct timeval *tv)
+ts_float(const struct timespec *tv)
{
- return tv->tv_sec + tv->tv_usec/1000000.0;
+ return tv->tv_sec + tv->tv_nsec/1000000000.0;
}
void
-tv_add(struct timeval *tv, const struct timeval *a, const struct timeval *b)
+ts_add(struct timespec *tv, const struct timespec *a, const struct timespec *b)
{
tv->tv_sec = a->tv_sec + b->tv_sec;
- tv->tv_usec = a->tv_usec + b->tv_usec;
- if (tv->tv_usec >= 1000000) {
+ tv->tv_nsec = a->tv_nsec + b->tv_nsec;
+ if (tv->tv_nsec >= 1000000000) {
tv->tv_sec++;
- tv->tv_usec -= 1000000;
+ tv->tv_nsec -= 1000000000;
}
}
void
-tv_sub(struct timeval *tv, const struct timeval *a, const struct timeval *b)
+ts_sub(struct timespec *tv, const struct timespec *a, const struct timespec *b)
{
tv->tv_sec = a->tv_sec - b->tv_sec;
- tv->tv_usec = a->tv_usec - b->tv_usec;
- if (((long) tv->tv_usec) < 0) {
+ tv->tv_nsec = a->tv_nsec - b->tv_nsec;
+ if (tv->tv_nsec < 0) {
tv->tv_sec--;
- tv->tv_usec += 1000000;
+ tv->tv_nsec += 1000000000;
}
}
void
-tv_div(struct timeval *tv, const struct timeval *a, int n)
+ts_div(struct timespec *tv, const struct timespec *a, int n)
{
- tv->tv_usec = (a->tv_sec % n * 1000000 + a->tv_usec + n / 2) / n;
- tv->tv_sec = a->tv_sec / n + tv->tv_usec / 1000000;
- tv->tv_usec %= 1000000;
+ long long nsec = (a->tv_sec % n * 1000000000LL + a->tv_nsec + n / 2) / n;
+ tv->tv_sec = a->tv_sec / n + nsec / 1000000000;
+ tv->tv_nsec = nsec % 1000000000;
}
void
-tv_mul(struct timeval *tv, const struct timeval *a, int n)
+ts_mul(struct timespec *tv, const struct timespec *a, int n)
{
- tv->tv_usec = a->tv_usec * n;
- tv->tv_sec = a->tv_sec * n + tv->tv_usec / 1000000;
- tv->tv_usec %= 1000000;
-}
-
-const char *
-xlookup(const struct xlat *xlat, const uint64_t val)
-{
- for (; xlat->str != NULL; xlat++)
- if (xlat->val == val)
- return xlat->str;
- return NULL;
-}
-
-static int
-xlat_bsearch_compare(const void *a, const void *b)
-{
- const uint64_t val1 = *(const uint64_t *) a;
- const uint64_t val2 = ((const struct xlat *) b)->val;
- return (val1 > val2) ? 1 : (val1 < val2) ? -1 : 0;
-}
-
-const char *
-xlat_search(const struct xlat *xlat, const size_t nmemb, const uint64_t val)
-{
- const struct xlat *e =
- bsearch((const void*) &val,
- xlat, nmemb, sizeof(*xlat), xlat_bsearch_compare);
-
- return e ? e->str : NULL;
+ long long nsec = a->tv_nsec * n;
+ tv->tv_sec = a->tv_sec * n + nsec / 1000000000;
+ tv->tv_nsec = nsec % 1000000000;
}
#if !defined HAVE_STPCPY
next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits)
{
const unsigned endian = 1;
- int little_endian = * (char *) (void *) &endian;
+ int little_endian = *(char *) (void *) &endian;
const uint8_t *array = bit_array;
unsigned pos = cur_bit / 8;
}
}
-/**
- * Print entry in struct xlat table, if there.
- *
- * @param val Value to search a literal representation for.
- * @param dflt String (abbreviated in comment syntax) which should be emitted
- * if no appropriate xlat value has been found.
- * @param xlat (And the following arguments) Pointers to arrays of xlat values.
- * The last argument should be NULL.
- * @return 1 if appropriate xlat value has been found, 0 otherwise.
- */
-int
-printxvals(const uint64_t val, const char *dflt, const struct xlat *xlat, ...)
-{
- va_list args;
-
- va_start(args, xlat);
- for (; xlat; xlat = va_arg(args, const struct xlat *)) {
- const char *str = xlookup(xlat, val);
-
- if (str) {
- tprints(str);
- va_end(args);
- return 1;
- }
- }
- /* No hits -- print raw # instead. */
- tprintf("%#" PRIx64, val);
- tprints_comment(dflt);
-
- va_end(args);
-
- return 0;
-}
-
-/**
- * Print entry in sorted struct xlat table, if it is there.
- *
- * @param xlat Pointer to an array of xlat values (not terminated with
- * XLAT_END).
- * @param xlat_size Number of xlat elements present in array (usually ARRAY_SIZE
- * if array is declared in the unit's scope and not
- * terminated with XLAT_END).
- * @param val Value to search literal representation for.
- * @param dflt String (abbreviated in comment syntax) which should be
- * emitted if no appropriate xlat value has been found.
- * @return 1 if appropriate xlat value has been found, 0
- * otherwise.
- */
-int
-printxval_searchn(const struct xlat *xlat, size_t xlat_size, uint64_t val,
- const char *dflt)
-{
- const char *s = xlat_search(xlat, xlat_size, val);
-
- if (s) {
- tprints(s);
- return 1;
- }
-
- tprintf("%#" PRIx64, val);
- tprints_comment(dflt);
-
- return 0;
-}
-
/*
* Fetch 64bit argument at position arg_no and
* return the index of the next argument.
arg_no++;
}
#else /* SIZEOF_KERNEL_LONG_T == 4 */
-# if defined __ARM_EABI__ || \
- defined LINUX_MIPSO32 || \
- defined POWERPC || \
- defined XTENSA
+# if defined __ARM_EABI__ \
+ || defined LINUX_MIPSO32 \
+ || defined POWERPC \
+ || defined XTENSA
/* Align arg_no to the next even number. */
arg_no = (arg_no + 1) & 0xe;
# elif defined SH
return arg_no;
}
-/*
- * Interpret `xlat' as an array of flags
- * print the entries whose bits are on in `flags'
- */
-void
-addflags(const struct xlat *xlat, uint64_t flags)
-{
- for (; xlat->str; xlat++) {
- if (xlat->val && (flags & xlat->val) == xlat->val) {
- tprintf("|%s", xlat->str);
- flags &= ~xlat->val;
- }
- }
- if (flags) {
- tprintf("|%#" PRIx64, flags);
- }
-}
-
-/*
- * Interpret `xlat' as an array of flags.
- * Print to static string the entries whose bits are on in `flags'
- * Return static string.
- */
-const char *
-sprintflags(const char *prefix, const struct xlat *xlat, uint64_t flags)
-{
- static char outstr[1024];
- char *outptr;
- int found = 0;
-
- outptr = stpcpy(outstr, prefix);
-
- if (flags == 0 && xlat->val == 0 && xlat->str) {
- strcpy(outptr, xlat->str);
- return outstr;
- }
-
- for (; xlat->str; xlat++) {
- if (xlat->val && (flags & xlat->val) == xlat->val) {
- if (found)
- *outptr++ = '|';
- outptr = stpcpy(outptr, xlat->str);
- found = 1;
- flags &= ~xlat->val;
- if (!flags)
- break;
- }
- }
- if (flags) {
- if (found)
- *outptr++ = '|';
- outptr += sprintf(outptr, "%#" PRIx64, flags);
- }
-
- return outstr;
-}
-
-int
-printflags64(const struct xlat *xlat, uint64_t flags, const char *dflt)
-{
- int n;
- const char *sep;
-
- if (flags == 0 && xlat->val == 0 && xlat->str) {
- tprints(xlat->str);
- return 1;
- }
-
- sep = "";
- for (n = 0; xlat->str; xlat++) {
- if (xlat->val && (flags & xlat->val) == xlat->val) {
- tprintf("%s%s", sep, xlat->str);
- flags &= ~xlat->val;
- sep = "|";
- n++;
- }
- }
-
- if (n) {
- if (flags) {
- tprintf("%s%#" PRIx64, sep, flags);
- n++;
- }
- } else {
- if (flags) {
- tprintf("%#" PRIx64, flags);
- tprints_comment(dflt);
- } else {
- if (dflt)
- tprints("0");
- }
- }
-
- return n;
-}
-
void
-printaddr(const kernel_ulong_t addr)
+printaddr64(const uint64_t addr)
{
if (!addr)
tprints("NULL");
else
- tprintf("%#" PRI_klx, addr);
+ tprintf("%#" PRIx64, addr);
}
#define DEF_PRINTNUM(name, type) \
if (umove_or_printaddr(tcp, addr, &num)) \
return false; \
tprints("["); \
- printaddr(num); \
+ printaddr64(num); \
tprints("]"); \
return true; \
}
/**
* Prints time to a (static internal) buffer and returns pointer to it.
+ * Returns NULL if the provided time specification is not correct.
*
* @param sec Seconds since epoch.
* @param part_sec Amount of second parts since the start of a second.
* @param max_part_sec Maximum value of a valid part_sec.
* @param width 1 + floor(log10(max_part_sec)).
+ * @return Pointer to a statically allocated string on success,
+ * NULL on error.
*/
static const char *
sprinttime_ex(const long long sec, const unsigned long long part_sec,
if (!pos)
return NULL;
- if (part_sec > 0) {
- int ret = snprintf(buf + pos, sizeof(buf) - pos, ".%0*llu",
- width, part_sec);
-
- if (ret < 0 || (size_t) ret >= sizeof(buf) - pos)
- return NULL;
-
- pos += ret;
- }
+ if (part_sec > 0)
+ pos += xsnprintf(buf + pos, sizeof(buf) - pos, ".%0*llu",
+ width, part_sec);
return strftime(buf + pos, sizeof(buf) - pos, "%z", tmp) ? buf : NULL;
}
if (fd < 0)
return SOCK_PROTO_UNKNOWN;
- sprintf(path, "/proc/%u/fd/%u", tcp->pid, fd);
+ xsprintf(path, "/proc/%u/fd/%u", tcp->pid, fd);
r = getxattr(path, "system.sockprotoname", buf, bufsize - 1);
if (r <= 0)
return SOCK_PROTO_UNKNOWN;
#endif
}
+unsigned long
+getfdinode(struct tcb *tcp, int fd)
+{
+ char path[PATH_MAX + 1];
+
+ if (getfdpath(tcp, fd, path, sizeof(path)) >= 0) {
+ const char *str = STR_STRIP_PREFIX(path, "socket:[");
+
+ if (str != path) {
+ const size_t str_len = strlen(str);
+ if (str_len && str[str_len - 1] == ']')
+ return strtoul(str, NULL, 10);
+ }
+ }
+
+ return 0;
+}
+
+static bool
+printsocket(struct tcb *tcp, int fd, const char *path)
+{
+ const char *str = STR_STRIP_PREFIX(path, "socket:[");
+ size_t len;
+ unsigned long inode;
+
+ return (str != path)
+ && (len = strlen(str))
+ && (str[len - 1] == ']')
+ && (inode = strtoul(str, NULL, 10))
+ && print_sockaddr_by_inode(tcp, fd, inode);
+}
+
+static bool
+printdev(struct tcb *tcp, int fd, const char *path)
+{
+ struct_stat st;
+
+ if (path[0] != '/')
+ return false;
+
+ if (stat_file(path, &st)) {
+ debug_func_perror_msg("stat(\"%s\")", path);
+ return false;
+ }
+
+ switch (st.st_mode & S_IFMT) {
+ case S_IFBLK:
+ case S_IFCHR:
+ print_quoted_string_ex(path, strlen(path),
+ QUOTE_OMIT_LEADING_TRAILING_QUOTES,
+ "<>");
+ tprintf("<%s %u:%u>",
+ S_ISBLK(st.st_mode)? "block" : "char",
+ major(st.st_rdev), minor(st.st_rdev));
+ return true;
+ }
+
+ return false;
+}
+
void
printfd(struct tcb *tcp, int fd)
{
char path[PATH_MAX + 1];
if (show_fd_path && getfdpath(tcp, fd, path, sizeof(path)) >= 0) {
- const char *str;
- size_t len;
- unsigned long inode;
-
tprintf("%d<", fd);
if (show_fd_path <= 1
- || (str = STR_STRIP_PREFIX(path, "socket:[")) == path
- || !(len = strlen(str))
- || str[len - 1] != ']'
- || !(inode = strtoul(str, NULL, 10))
- || !print_sockaddr_by_inode(tcp, fd, inode)) {
- print_quoted_string(path, strlen(path),
- QUOTE_OMIT_LEADING_TRAILING_QUOTES);
+ || (!printsocket(tcp, fd, path)
+ && !printdev(tcp, fd, path))) {
+ print_quoted_string_ex(path, strlen(path),
+ QUOTE_OMIT_LEADING_TRAILING_QUOTES, "<>");
}
tprints(">");
} else
* Quote string `instr' of length `size'
* Write up to (3 + `size' * 4) bytes to `outstr' buffer.
*
+ * `escape_chars' specifies characters (in addition to characters with
+ * codes 0..31, 127..255, single and double quotes) that should be escaped.
+ *
* If QUOTE_0_TERMINATED `style' flag is set,
* treat `instr' as a NUL-terminated string,
* checking up to (`size' + 1) bytes of `instr'.
*/
int
string_quote(const char *instr, char *outstr, const unsigned int size,
- const unsigned int style)
+ const unsigned int style, const char *escape_chars)
{
const unsigned char *ustr = (const unsigned char *) instr;
char *s = outstr;
unsigned int i;
int usehex, c, eol;
+ bool escape;
if (style & QUOTE_0_TERMINATED)
eol = '\0';
}
}
+ if (style & QUOTE_EMIT_COMMENT)
+ s = stpcpy(s, " /* ");
if (!(style & QUOTE_OMIT_LEADING_TRAILING_QUOTES))
*s++ = '\"';
*s++ = "0123456789abcdef"[c >> 4];
*s++ = "0123456789abcdef"[c & 0xf];
}
- } else {
- for (i = 0; i < size; ++i) {
- c = ustr[i];
- /* Check for NUL-terminated string. */
- if (c == eol)
- goto asciz_ended;
- if ((i == (size - 1)) &&
- (style & QUOTE_OMIT_TRAILING_0) && (c == '\0'))
- goto asciz_ended;
- switch (c) {
- case '\"': case '\\':
- *s++ = '\\';
- *s++ = c;
- break;
- case '\f':
- *s++ = '\\';
- *s++ = 'f';
- break;
- case '\n':
- *s++ = '\\';
- *s++ = 'n';
- break;
- case '\r':
- *s++ = '\\';
- *s++ = 'r';
- break;
- case '\t':
- *s++ = '\\';
- *s++ = 't';
- break;
- case '\v':
- *s++ = '\\';
- *s++ = 'v';
- break;
- default:
- if (c >= ' ' && c <= 0x7e)
- *s++ = c;
- else {
- /* Print \octal */
- *s++ = '\\';
- if (i + 1 < size
- && ustr[i + 1] >= '0'
- && ustr[i + 1] <= '9'
- ) {
- /* Print \ooo */
+
+ goto string_ended;
+ }
+
+ for (i = 0; i < size; ++i) {
+ c = ustr[i];
+ /* Check for NUL-terminated string. */
+ if (c == eol)
+ goto asciz_ended;
+ if ((i == (size - 1)) &&
+ (style & QUOTE_OMIT_TRAILING_0) && (c == '\0'))
+ goto asciz_ended;
+ switch (c) {
+ case '\"': case '\\':
+ *s++ = '\\';
+ *s++ = c;
+ break;
+ case '\f':
+ *s++ = '\\';
+ *s++ = 'f';
+ break;
+ case '\n':
+ *s++ = '\\';
+ *s++ = 'n';
+ break;
+ case '\r':
+ *s++ = '\\';
+ *s++ = 'r';
+ break;
+ case '\t':
+ *s++ = '\\';
+ *s++ = 't';
+ break;
+ case '\v':
+ *s++ = '\\';
+ *s++ = 'v';
+ break;
+ default:
+ escape = (c < ' ') || (c > 0x7e);
+
+ if (!escape && escape_chars)
+ escape = !!strchr(escape_chars, c);
+
+ if (!escape) {
+ *s++ = c;
+ } else {
+ /* Print \octal */
+ *s++ = '\\';
+ if (i + 1 < size
+ && ustr[i + 1] >= '0'
+ && ustr[i + 1] <= '7'
+ ) {
+ /* Print \ooo */
+ *s++ = '0' + (c >> 6);
+ *s++ = '0' + ((c >> 3) & 0x7);
+ } else {
+ /* Print \[[o]o]o */
+ if ((c >> 3) != 0) {
+ if ((c >> 6) != 0)
*s++ = '0' + (c >> 6);
- *s++ = '0' + ((c >> 3) & 0x7);
- } else {
- /* Print \[[o]o]o */
- if ((c >> 3) != 0) {
- if ((c >> 6) != 0)
- *s++ = '0' + (c >> 6);
- *s++ = '0' + ((c >> 3) & 0x7);
- }
- }
- *s++ = '0' + (c & 0x7);
+ *s++ = '0' + ((c >> 3) & 0x7);
}
- break;
+ }
+ *s++ = '0' + (c & 0x7);
}
}
}
+ string_ended:
if (!(style & QUOTE_OMIT_LEADING_TRAILING_QUOTES))
*s++ = '\"';
+ if (style & QUOTE_EMIT_COMMENT)
+ s = stpcpy(s, " */");
*s = '\0';
/* Return zero if we printed entire ASCIZ string (didn't truncate it) */
asciz_ended:
if (!(style & QUOTE_OMIT_LEADING_TRAILING_QUOTES))
*s++ = '\"';
+ if (style & QUOTE_EMIT_COMMENT)
+ s = stpcpy(s, " */");
*s = '\0';
/* Return zero: we printed entire ASCIZ string (didn't truncate it) */
return 0;
* Note that if QUOTE_0_TERMINATED is not set, always returns 1.
*/
int
-print_quoted_string(const char *str, unsigned int size,
- const unsigned int style)
+print_quoted_string_ex(const char *str, unsigned int size,
+ const unsigned int style, const char *escape_chars)
{
char *buf;
char *outstr;
alloc_size = 4 * size;
if (alloc_size / 4 != size) {
- error_msg("Out of memory");
+ error_func_msg("requested %u bytes exceeds %u bytes limit",
+ size, -1U / 4);
tprints("???");
return -1;
}
- alloc_size += 1 + (style & QUOTE_OMIT_LEADING_TRAILING_QUOTES ? 0 : 2);
+ alloc_size += 1 + (style & QUOTE_OMIT_LEADING_TRAILING_QUOTES ? 0 : 2) +
+ (style & QUOTE_EMIT_COMMENT ? 7 : 0);
if (use_alloca(alloc_size)) {
outstr = alloca(alloc_size);
} else {
outstr = buf = malloc(alloc_size);
if (!buf) {
- error_msg("Out of memory");
+ error_func_msg("memory exhausted when tried to allocate"
+ " %u bytes", alloc_size);
tprints("???");
return -1;
}
}
- rc = string_quote(str, outstr, size, style);
+ rc = string_quote(str, outstr, size, style, escape_chars);
tprints(outstr);
free(buf);
return rc;
}
+inline int
+print_quoted_string(const char *str, unsigned int size,
+ const unsigned int style)
+{
+ return print_quoted_string_ex(str, size, style, NULL);
+}
+
+/*
+ * Quote a NUL-terminated string `str' of length up to `size' - 1
+ * and print the result.
+ *
+ * Returns 0 if NUL was seen, 1 otherwise.
+ */
+int
+print_quoted_cstring(const char *str, unsigned int size)
+{
+ int unterminated =
+ print_quoted_string(str, size, QUOTE_0_TERMINATED);
+
+ if (unterminated)
+ tprints("...");
+
+ return unterminated;
+}
+
/*
* Print path string specified by address `addr' and length `n'.
* If path length exceeds `n', append `...' to the output.
+ *
+ * Returns the result of umovenstr.
*/
-void
+int
printpathn(struct tcb *const tcp, const kernel_ulong_t addr, unsigned int n)
{
- char path[PATH_MAX + 1];
+ char path[PATH_MAX];
int nul_seen;
if (!addr) {
tprints("NULL");
- return;
+ return -1;
}
/* Cap path length to the path buffer size */
- if (n > sizeof path - 1)
- n = sizeof path - 1;
+ if (n > sizeof(path) - 1)
+ n = sizeof(path) - 1;
/* Fetch one byte more to find out whether path length > n. */
nul_seen = umovestr(tcp, addr, n + 1, path);
if (nul_seen < 0)
printaddr(addr);
else {
- path[n++] = '\0';
- print_quoted_string(path, n, QUOTE_0_TERMINATED);
- if (!nul_seen)
- tprints("...");
+ path[n++] = !nul_seen;
+ print_quoted_cstring(path, n);
}
+
+ return nul_seen;
}
-void
+int
printpath(struct tcb *const tcp, const kernel_ulong_t addr)
{
/* Size must correspond to char path[] size in printpathn */
- printpathn(tcp, addr, PATH_MAX);
+ return printpathn(tcp, addr, PATH_MAX - 1);
}
/*
* Pass `user_style' on to `string_quote'.
* Append `...' to the output if either the string length exceeds `max_strlen',
* or QUOTE_0_TERMINATED bit is set and the string length exceeds `len'.
+ *
+ * Returns the result of umovenstr if style has QUOTE_0_TERMINATED,
+ * or the result of umoven otherwise.
*/
-void
+int
printstr_ex(struct tcb *const tcp, const kernel_ulong_t addr,
const kernel_ulong_t len, const unsigned int user_style)
{
- static char *str = NULL;
+ static char *str;
static char *outstr;
+
unsigned int size;
unsigned int style = user_style;
int rc;
if (!addr) {
tprints("NULL");
- return;
+ return -1;
}
/* Allocate static buffers if they are not allocated yet. */
if (!str) {
- unsigned int outstr_size = 4 * max_strlen + /*for quotes and NUL:*/ 3;
+ const unsigned int outstr_size =
+ 4 * max_strlen + /* for quotes and NUL */ 3;
+ /*
+ * We can assume that outstr_size / 4 == max_strlen
+ * since we have a guarantee that max_strlen <= -1U / 4.
+ */
- if (outstr_size / 4 != max_strlen)
- die_out_of_memory();
str = xmalloc(max_strlen + 1);
outstr = xmalloc(outstr_size);
}
if (rc < 0) {
printaddr(addr);
- return;
+ return rc;
}
if (size > max_strlen)
/* If string_quote didn't see NUL and (it was supposed to be ASCIZ str
* or we were requested to print more than -s NUM chars)...
*/
- ellipsis = string_quote(str, outstr, size, style)
+ ellipsis = string_quote(str, outstr, size, style, NULL)
&& len
&& ((style & QUOTE_0_TERMINATED)
|| len > max_strlen);
tprints(outstr);
if (ellipsis)
tprints("...");
+
+ return rc;
}
void
} iovu;
#define iov iovu.iov64
#define sizeof_iov \
- (current_wordsize == 4 ? sizeof(*iovu.iov32) : sizeof(*iovu.iov64))
+ (current_wordsize == 4 ? (unsigned int) sizeof(*iovu.iov32) \
+ : (unsigned int) sizeof(*iovu.iov64))
#define iov_iov_base(i) \
(current_wordsize == 4 ? (uint64_t) iovu.iov32[i].base : iovu.iov64[i].base)
#define iov_iov_len(i) \
(current_wordsize == 4 ? (uint64_t) iovu.iov32[i].len : iovu.iov64[i].len)
#else
struct iovec *iov;
-#define sizeof_iov sizeof(*iov)
+#define sizeof_iov ((unsigned int) sizeof(*iov))
#define iov_iov_base(i) ptr_to_kulong(iov[i].iov_base)
#define iov_iov_len(i) iov[i].iov_len
#endif
int i;
- unsigned size;
+ unsigned int size = sizeof_iov * len;
+ if (size / sizeof_iov != (unsigned int) len) {
+ error_func_msg("requested %u iovec elements exceeds"
+ " %u iovec limit", len, -1U / sizeof_iov);
+ return;
+ }
- size = sizeof_iov * len;
- /* Assuming no sane program has millions of iovs */
- if ((unsigned)len > 1024*1024 /* insane or negative size? */
- || (iov = malloc(size)) == NULL) {
- error_msg("Out of memory");
+ iov = malloc(size);
+ if (!iov) {
+ error_func_msg("memory exhausted when tried to allocate"
+ " %u bytes", size);
return;
}
if (umoven(tcp, addr, size, iov) >= 0) {
const unsigned char *src;
int i;
+ if ((len < 0) || (len > INT_MAX - 16))
+ return;
+
memset(outbuf, ' ', sizeof(outbuf));
if (strsize < len + 16) {
str = malloc(len + 16);
if (!str) {
strsize = -1;
- error_msg("Out of memory");
+ error_func_msg("memory exhausted when tried to allocate"
+ " %zu bytes", (size_t) (len + 16));
return;
}
strsize = len + 16;
if (i < len) {
*dst++ = "0123456789abcdef"[*src >> 4];
*dst++ = "0123456789abcdef"[*src & 0xf];
- }
- else {
+ } else {
*dst++ = ' ';
*dst++ = ' ';
}
}
}
-static bool process_vm_readv_not_supported = 0;
-#ifndef HAVE_PROCESS_VM_READV
-/*
- * Need to do this since process_vm_readv() is not yet available in libc.
- * When libc is be updated, only "static bool process_vm_readv_not_supported"
- * line should remain.
- */
-/* Have to avoid duplicating with the C library headers. */
-static ssize_t strace_process_vm_readv(pid_t pid,
- const struct iovec *lvec,
- unsigned long liovcnt,
- const struct iovec *rvec,
- unsigned long riovcnt,
- unsigned long flags)
+bool
+tfetch_mem64(struct tcb *const tcp, const uint64_t addr,
+ const unsigned int len, void *const our_addr)
{
- return syscall(__NR_process_vm_readv, (long)pid, lvec, liovcnt, rvec, riovcnt, flags);
+ return addr && verbose(tcp) &&
+ (entering(tcp) || !syserror(tcp)) &&
+ !umoven(tcp, addr, len, our_addr);
}
-# define process_vm_readv strace_process_vm_readv
-#endif /* !HAVE_PROCESS_VM_READV */
-static ssize_t
-vm_read_mem(const pid_t pid, void *const laddr,
- const kernel_ulong_t raddr, const size_t len)
+bool
+tfetch_mem64_ignore_syserror(struct tcb *const tcp, const uint64_t addr,
+ const unsigned int len, void *const our_addr)
{
- const unsigned long truncated_raddr = raddr;
-
- if (raddr != (kernel_ulong_t) truncated_raddr) {
- errno = EIO;
- return -1;
- }
-
- const struct iovec local = {
- .iov_base = laddr,
- .iov_len = len
- };
- const struct iovec remote = {
- .iov_base = (void *) truncated_raddr,
- .iov_len = len
- };
-
- return process_vm_readv(pid, &local, 1, &remote, 1, 0);
+ return addr && verbose(tcp) &&
+ !umoven(tcp, addr, len, our_addr);
}
-/*
- * move `len' bytes of data from process `pid'
- * at address `addr' to our space at `our_addr'
- */
int
-umoven(struct tcb *const tcp, kernel_ulong_t addr, unsigned int len,
- void *const our_addr)
+umoven_or_printaddr64(struct tcb *const tcp, const uint64_t addr,
+ const unsigned int len, void *const our_addr)
{
- char *laddr = our_addr;
- int pid = tcp->pid;
- unsigned int n, m, nread;
- union {
- long val;
- char x[sizeof(long)];
- } u;
-
-#if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
- if (current_wordsize < sizeof(addr)
- && (addr & (~ (kernel_ulong_t) -1U))) {
- return -1;
- }
-#endif
-
- if (!process_vm_readv_not_supported) {
- int r = vm_read_mem(pid, laddr, addr, len);
- if ((unsigned int) r == len)
- return 0;
- if (r >= 0) {
- error_msg("umoven: short read (%u < %u) @0x%" PRI_klx,
- (unsigned int) r, len, addr);
- return -1;
- }
- switch (errno) {
- case ENOSYS:
- process_vm_readv_not_supported = 1;
- break;
- case EPERM:
- /* operation not permitted, try PTRACE_PEEKDATA */
- break;
- case ESRCH:
- /* the process is gone */
- return -1;
- case EFAULT: case EIO:
- /* address space is inaccessible */
- return -1;
- default:
- /* all the rest is strange and should be reported */
- perror_msg("process_vm_readv");
- return -1;
- }
- }
-
- nread = 0;
- if (addr & (sizeof(long) - 1)) {
- /* addr not a multiple of sizeof(long) */
- n = addr & (sizeof(long) - 1); /* residue */
- addr &= -sizeof(long); /* aligned address */
- errno = 0;
- u.val = ptrace(PTRACE_PEEKDATA, pid, addr, 0);
- switch (errno) {
- case 0:
- break;
- case ESRCH: case EINVAL:
- /* these could be seen if the process is gone */
- return -1;
- case EFAULT: case EIO: case EPERM:
- /* address space is inaccessible */
- return -1;
- default:
- /* all the rest is strange and should be reported */
- perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%" PRI_klx,
- pid, addr);
- return -1;
- }
- m = MIN(sizeof(long) - n, len);
- memcpy(laddr, &u.x[n], m);
- addr += sizeof(long);
- laddr += m;
- nread += m;
- len -= m;
- }
- while (len) {
- errno = 0;
- u.val = ptrace(PTRACE_PEEKDATA, pid, addr, 0);
- switch (errno) {
- case 0:
- break;
- case ESRCH: case EINVAL:
- /* these could be seen if the process is gone */
- return -1;
- case EFAULT: case EIO: case EPERM:
- /* address space is inaccessible */
- if (nread) {
- perror_msg("umoven: short read (%u < %u) @0x%" PRI_klx,
- nread, nread + len, addr - nread);
- }
- return -1;
- default:
- /* all the rest is strange and should be reported */
- perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%" PRI_klx,
- pid, addr);
- return -1;
- }
- m = MIN(sizeof(long), len);
- memcpy(laddr, u.x, m);
- addr += sizeof(long);
- laddr += m;
- nread += m;
- len -= m;
- }
-
- return 0;
+ if (tfetch_mem64(tcp, addr, len, our_addr))
+ return 0;
+ printaddr64(addr);
+ return -1;
}
int
-umoven_or_printaddr(struct tcb *const tcp, const kernel_ulong_t addr,
- const unsigned int len, void *const our_addr)
+umoven_or_printaddr64_ignore_syserror(struct tcb *const tcp,
+ const uint64_t addr,
+ const unsigned int len,
+ void *const our_addr)
{
- if (!addr || !verbose(tcp) || (exiting(tcp) && syserror(tcp)) ||
- umoven(tcp, addr, len, our_addr) < 0) {
- printaddr(addr);
- return -1;
- }
- return 0;
+ if (tfetch_mem64_ignore_syserror(tcp, addr, len, our_addr))
+ return 0;
+ printaddr64(addr);
+ return -1;
}
-int
-umoven_or_printaddr_ignore_syserror(struct tcb *const tcp,
- const kernel_ulong_t addr,
- const unsigned int len,
- void *const our_addr)
+bool
+print_int32_array_member(struct tcb *tcp, void *elem_buf, size_t elem_size,
+ void *data)
{
- if (!addr || !verbose(tcp) || umoven(tcp, addr, len, our_addr) < 0) {
- printaddr(addr);
- return -1;
- }
- return 0;
+ tprintf("%" PRId32, *(int32_t *) elem_buf);
+
+ return true;
}
-/*
- * Like `umove' but make the additional effort of looking
- * for a terminating zero byte.
- *
- * Returns < 0 on error, > 0 if NUL was seen,
- * (TODO if useful: return count of bytes including NUL),
- * else 0 if len bytes were read but no NUL byte seen.
- *
- * Note: there is no guarantee we won't overwrite some bytes
- * in laddr[] _after_ terminating NUL (but, of course,
- * we never write past laddr[len-1]).
- */
-int
-umovestr(struct tcb *const tcp, kernel_ulong_t addr, unsigned int len, char *laddr)
+bool
+print_uint32_array_member(struct tcb *tcp, void *elem_buf, size_t elem_size,
+ void *data)
{
- const unsigned long x01010101 = (unsigned long) 0x0101010101010101ULL;
- const unsigned long x80808080 = (unsigned long) 0x8080808080808080ULL;
-
- int pid = tcp->pid;
- unsigned int n, m, nread;
- union {
- unsigned long val;
- char x[sizeof(long)];
- } u;
-
-#if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
- if (current_wordsize < sizeof(addr)
- && (addr & (~ (kernel_ulong_t) -1U))) {
- return -1;
- }
-#endif
+ tprintf("%" PRIu32, *(uint32_t *) elem_buf);
- nread = 0;
- if (!process_vm_readv_not_supported) {
- const size_t page_size = get_pagesize();
- const size_t page_mask = page_size - 1;
-
- while (len > 0) {
- unsigned int chunk_len;
- unsigned int end_in_page;
+ return true;
+}
- /*
- * Don't cross pages, otherwise we can get EFAULT
- * and fail to notice that terminating NUL lies
- * in the existing (first) page.
- */
- chunk_len = len > page_size ? page_size : len;
- end_in_page = (addr + chunk_len) & page_mask;
- if (chunk_len > end_in_page) /* crosses to the next page */
- chunk_len -= end_in_page;
-
- int r = vm_read_mem(pid, laddr, addr, chunk_len);
- if (r > 0) {
- if (memchr(laddr, '\0', r))
- return 1;
- addr += r;
- laddr += r;
- nread += r;
- len -= r;
- continue;
- }
- switch (errno) {
- case ENOSYS:
- process_vm_readv_not_supported = 1;
- goto vm_readv_didnt_work;
- case ESRCH:
- /* the process is gone */
- return -1;
- case EPERM:
- /* operation not permitted, try PTRACE_PEEKDATA */
- if (!nread)
- goto vm_readv_didnt_work;
- /* fall through */
- case EFAULT: case EIO:
- /* address space is inaccessible */
- if (nread) {
- perror_msg("umovestr: short read (%d < %d) @0x%" PRI_klx,
- nread, nread + len, addr - nread);
- }
- return -1;
- default:
- /* all the rest is strange and should be reported */
- perror_msg("process_vm_readv");
- return -1;
- }
- }
- return 0;
- }
- vm_readv_didnt_work:
-
- if (addr & (sizeof(long) - 1)) {
- /* addr not a multiple of sizeof(long) */
- n = addr & (sizeof(long) - 1); /* residue */
- addr &= -sizeof(long); /* aligned address */
- errno = 0;
- u.val = ptrace(PTRACE_PEEKDATA, pid, addr, 0);
- switch (errno) {
- case 0:
- break;
- case ESRCH: case EINVAL:
- /* these could be seen if the process is gone */
- return -1;
- case EFAULT: case EIO: case EPERM:
- /* address space is inaccessible */
- return -1;
- default:
- /* all the rest is strange and should be reported */
- perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%" PRI_klx,
- pid, addr);
- return -1;
- }
- m = MIN(sizeof(long) - n, len);
- memcpy(laddr, &u.x[n], m);
- while (n & (sizeof(long) - 1))
- if (u.x[n++] == '\0')
- return 1;
- addr += sizeof(long);
- laddr += m;
- nread += m;
- len -= m;
- }
+bool
+print_uint64_array_member(struct tcb *tcp, void *elem_buf, size_t elem_size,
+ void *data)
+{
+ tprintf("%" PRIu64, *(uint64_t *) elem_buf);
- while (len) {
- errno = 0;
- u.val = ptrace(PTRACE_PEEKDATA, pid, addr, 0);
- switch (errno) {
- case 0:
- break;
- case ESRCH: case EINVAL:
- /* these could be seen if the process is gone */
- return -1;
- case EFAULT: case EIO: case EPERM:
- /* address space is inaccessible */
- if (nread) {
- perror_msg("umovestr: short read (%d < %d) @0x%" PRI_klx,
- nread, nread + len, addr - nread);
- }
- return -1;
- default:
- /* all the rest is strange and should be reported */
- perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%" PRI_klx,
- pid, addr);
- return -1;
- }
- m = MIN(sizeof(long), len);
- memcpy(laddr, u.x, m);
- /* "If a NUL char exists in this word" */
- if ((u.val - x01010101) & ~u.val & x80808080)
- return 1;
- addr += sizeof(long);
- laddr += m;
- nread += m;
- len -= m;
- }
- return 0;
+ return true;
}
/*
*
* Array elements are being fetched to the address specified by elem_buf.
*
- * The fetcher callback function specified by umoven_func should follow
- * the same semantics as umoven_or_printaddr function.
+ * The fetcher callback function specified by tfetch_mem_func should follow
+ * the same semantics as tfetch_mem function.
*
* The printer callback function specified by print_func is expected
* to print something; if it returns false, no more iterations will be made.
* - "NULL", if start_addr is NULL;
* - "[]", if nmemb is 0;
* - start_addr, if nmemb * elem_size overflows or wraps around;
- * - nothing, if the first element cannot be fetched
- * (if umoven_func returns non-zero), but it is assumed that
- * umoven_func has printed the address it failed to fetch data from;
+ * - start_addr, if the first tfetch_mem_func invocation returned false;
* - elements of the array, delimited by ", ", with the array itself
* enclosed with [] brackets.
*
* - "..." is printed instead of max_strlen+1 element
* and no more iterations will be made.
*
- * This function returns true only if
- * - umoven_func has been called at least once AND
- * - umoven_func has not returned false.
+ * This function returns true only if tfetch_mem_func has returned true
+ * at least once.
*/
bool
-print_array(struct tcb *const tcp,
- const kernel_ulong_t start_addr,
- const size_t nmemb,
- void *const elem_buf,
- const size_t elem_size,
- int (*const umoven_func)(struct tcb *,
- kernel_ulong_t,
- unsigned int,
- void *),
- bool (*const print_func)(struct tcb *,
- void *elem_buf,
- size_t elem_size,
- void *opaque_data),
- void *const opaque_data)
+print_array_ex(struct tcb *const tcp,
+ const kernel_ulong_t start_addr,
+ const size_t nmemb,
+ void *const elem_buf,
+ const size_t elem_size,
+ tfetch_mem_fn tfetch_mem_func,
+ print_fn print_func,
+ void *const opaque_data,
+ unsigned int flags,
+ const struct xlat *index_xlat,
+ size_t index_xlat_size,
+ const char *index_dflt)
{
if (!start_addr) {
tprints("NULL");
(abbrev(tcp) && max_strlen < nmemb) ?
start_addr + elem_size * max_strlen : end_addr;
kernel_ulong_t cur;
+ kernel_ulong_t idx = 0;
+ enum xlat_style xlat_style = flags & XLAT_STYLE_MASK;
- for (cur = start_addr; cur < end_addr; cur += elem_size) {
+ for (cur = start_addr; cur < end_addr; cur += elem_size, idx++) {
if (cur != start_addr)
tprints(", ");
- if (umoven_func(tcp, cur, elem_size, elem_buf))
+ if (!tfetch_mem_func(tcp, cur, elem_size, elem_buf)) {
+ if (cur == start_addr)
+ printaddr(cur);
+ else {
+ tprints("...");
+ printaddr_comment(cur);
+ }
break;
+ }
if (cur == start_addr)
tprints("[");
break;
}
+ if (flags & PAF_PRINT_INDICES) {
+ tprints("[");
+
+ if (!index_xlat) {
+ print_xlat_ex(idx, NULL, xlat_style);
+ } else if (flags & PAF_INDEX_XLAT_VALUE_INDEXED) {
+ printxval_indexn_ex(index_xlat,
+ index_xlat_size, idx,
+ index_dflt, xlat_style);
+ } else {
+ printxvals_ex(idx, index_dflt, xlat_style,
+ (flags & PAF_INDEX_XLAT_SORTED)
+ && idx ? NULL : index_xlat,
+ NULL);
+ }
+
+ tprints("] = ");
+ }
+
if (!print_func(tcp, elem_buf, elem_size, opaque_data)) {
cur = end_addr;
break;
#endif
int
-read_int_from_file(const char *const fname, int *const pvalue)
+read_int_from_file(struct tcb *tcp, const char *const fname, int *const pvalue)
{
const int fd = open_file(fname, O_RDONLY);
if (fd < 0)
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