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proj: Implement mmap, munmap

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This commit is contained in:
Lorenz Stechauner
2025-03-01 22:54:51 +01:00
parent aa5cb0ae9d
commit cf71b7b9d1
3 changed files with 114 additions and 31 deletions
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21
proj/server/src/intercept.py
View File

@@ -10,7 +10,8 @@ import re
type Pointer = int type Pointer = int
type PointerTo[T] = tuple[Pointer, T] type PointerTo[T] = tuple[Pointer, T]
type Flags = tuple[Pointer, list[str]] type Constant = tuple[int, str]
type Flags = tuple[int, list[str]]
StructTimeSpec = TypedDict('StructTimeSpec', {'tv_sec': int, 'tv_nsec': int}) StructTimeSpec = TypedDict('StructTimeSpec', {'tv_sec': int, 'tv_nsec': int})
StructSigAction = TypedDict('StructSigAction', {'sa_flags': Flags, 'sa_handler': NotRequired[Pointer], 'sa_sigaction': NotRequired[Pointer], 'sa_mask': list[str]}) StructSigAction = TypedDict('StructSigAction', {'sa_flags': Flags, 'sa_handler': NotRequired[Pointer], 'sa_sigaction': NotRequired[Pointer], 'sa_mask': list[str]})
@@ -234,14 +235,14 @@ class Handler(StreamRequestHandler):
def after_close(self, fildes: int, def after_close(self, fildes: int,
ret_value: int, errno: str = None) -> None: ret_value: int, errno: str = None) -> None:
raise NotImplementedError() raise NotImplementedError()
def before_sigaction(self, sig: int, act: PointerTo[StructSigAction], oact_ptr: Pointer) -> str: def before_sigaction(self, sig: Constant, act: PointerTo[StructSigAction], oact_ptr: Pointer) -> str:
raise NotImplementedError() raise NotImplementedError()
def after_sigaction(self, sig: int, act: PointerTo[StructSigAction], oact_ptr: Pointer, def after_sigaction(self, sig: Constant, act: PointerTo[StructSigAction], oact_ptr: Pointer,
ret_value: int, errno: str = None, oact: StructSigAction = None) -> None: ret_value: int, errno: str = None, oact: StructSigAction = None) -> None:
raise NotImplementedError() raise NotImplementedError()
def before_sem_init(self, sem: int, pshared: int, value: int) -> str: def before_sem_init(self, sem: Pointer, pshared: int, value: int) -> str:
raise NotImplementedError() raise NotImplementedError()
def after_sem_init(self, sem: int, pshared: int, value: int, def after_sem_init(self, sem: Pointer, pshared: int, value: int,
ret_value: int, errno: str = None) -> None: ret_value: int, errno: str = None) -> None:
raise NotImplementedError() raise NotImplementedError()
def before_sem_open(self, name: str, oflag: Flags, mode: Optional[int], value: Optional[int]) -> str: def before_sem_open(self, name: str, oflag: Flags, mode: Optional[int], value: Optional[int]) -> str:
@@ -299,6 +300,16 @@ class Handler(StreamRequestHandler):
def after_shm_unlink(self, name: PointerTo[bytes], def after_shm_unlink(self, name: PointerTo[bytes],
ret_value: int, errno: str = None) -> None: ret_value: int, errno: str = None) -> None:
raise NotImplementedError() raise NotImplementedError()
def before_mmap(self, addr: Pointer, len_value: int, prot: Flags, flags: Flags, fildes: int, off: int) -> str:
raise NotImplementedError()
def after_mmap(self, addr: Pointer, len_value: int, prot: Flags, flags: Flags, fildes: int, off: int,
ret_value: Pointer, errno: str = None) -> None:
raise NotImplementedError()
def before_munmap(self, addr: Pointer, len_value: int) -> str:
raise NotImplementedError()
def after_munmap(self, addr: Pointer, len_value: int,
ret_value: int, errno: str = None) -> None:
raise NotImplementedError()
class MemoryAllocationTester(Handler): class MemoryAllocationTester(Handler):

2
proj/test1/Makefile
View File

@@ -27,7 +27,7 @@ main: bin/main.o
main_intercept: bin/main.o src/intercept.c main_intercept: bin/main.o src/intercept.c
$(CC) -o $@ $^ $(CFLAGS) -lc -Wl,--wrap=malloc,--wrap=free,--wrap=calloc,--wrap=realloc,--wrap=reallocarray,--wrap=getopt,--wrap=exit,--wrap=close,--wrap=sigaction,\ $(CC) -o $@ $^ $(CFLAGS) -lc -Wl,--wrap=malloc,--wrap=free,--wrap=calloc,--wrap=realloc,--wrap=reallocarray,--wrap=getopt,--wrap=exit,--wrap=close,--wrap=sigaction,\
--wrap=sem_init,--wrap=sem_open,--wrap=sem_post,--wrap=sem_wait,--wrap=sem_trywait,--wrap=sem_timedwait,--wrap=sem_getvalue,--wrap=sem_close,--wrap=sem_unlink,--wrap=sem_destroy,\ --wrap=sem_init,--wrap=sem_open,--wrap=sem_post,--wrap=sem_wait,--wrap=sem_trywait,--wrap=sem_timedwait,--wrap=sem_getvalue,--wrap=sem_close,--wrap=sem_unlink,--wrap=sem_destroy,\
--wrap=shm_open,--wrap=shm_unlink --wrap=shm_open,--wrap=shm_unlink,--wrap=mmap,--wrap=munmap
clean: clean:
rm -rf main main_wrapped bin/* *.so *.ko *.o rm -rf main main_wrapped bin/* *.so *.ko *.o

122
proj/test1/src/intercept.c
View File

@@ -17,6 +17,7 @@
#include <stdarg.h> #include <stdarg.h>
#include <semaphore.h> #include <semaphore.h>
#include <signal.h> #include <signal.h>
#include <sys/mman.h>
#define BUFFER_SIZE 256 #define BUFFER_SIZE 256
@@ -42,6 +43,8 @@ static int (*__real_sem_unlink)(const char *);
static int (*__real_sem_destroy)(sem_t *); static int (*__real_sem_destroy)(sem_t *);
static int (*__real_shm_open)(const char *, int, mode_t); static int (*__real_shm_open)(const char *, int, mode_t);
static int (*__real_shm_unlink)(const char *); static int (*__real_shm_unlink)(const char *);
static void *(*__real_mmap)(void *, size_t, int, int, int, off_t);
static int (*__real_munmap)(void *, size_t);
#define load(name) \ #define load(name) \
if (((__real_ ## name) = dlsym(RTLD_NEXT, #name)) == NULL) { \ if (((__real_ ## name) = dlsym(RTLD_NEXT, #name)) == NULL) { \
fprintf(stderr, "intercept: unable to load symbol '%s': %s", #name, strerror(errno)); \ fprintf(stderr, "intercept: unable to load symbol '%s': %s", #name, strerror(errno)); \
@@ -70,12 +73,14 @@ extern int __real_sem_unlink(const char *);
extern int __real_sem_destroy(sem_t *); extern int __real_sem_destroy(sem_t *);
extern int __real_shm_open(const char *, int, mode_t); extern int __real_shm_open(const char *, int, mode_t);
extern int __real_shm_unlink(const char *); extern int __real_shm_unlink(const char *);
extern void *__real_mmap(void *, size_t, int, int, int, off_t);
extern int __real_munmap(void *, size_t);
#define sym(name) __wrap_ ## name #define sym(name) __wrap_ ## name
#endif #endif
#define ret_addr __builtin_return_address(0) #define ret_addr __builtin_return_address(0)
#define if_invalid(name) if (strcmp(buf, "ok") != 0) { fprintf(stderr, "intercept: " #name ": invalid command: '%s'\n", buf); } #define if_invalid(name) if (strcmp(buf, "ok") != 0) { fprintf(stderr, "intercept: %s: invalid command: '%s'\n", #name, buf); }
#define if_modify_int(name, type_1, var_1) if (strncmp(buf, "modify ", 7) == 0) { \ #define if_modify_int(name, type_1, var_1) if (strncmp(buf, "modify ", 7) == 0) { \
char *end_ptr = NULL; \ char *end_ptr = NULL; \
@@ -83,7 +88,7 @@ extern int __real_shm_unlink(const char *);
if (end_ptr != NULL && end_ptr[0] == 0 && end_ptr != buf + 7) { \ if (end_ptr != NULL && end_ptr[0] == 0 && end_ptr != buf + 7) { \
var_1 = (type_1)val; \ var_1 = (type_1)val; \
} else { \ } else { \
fprintf(stderr, "intercept: " #name ": invalid args in modify command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in modify command: '%s'\n", #name, buf + 7); \
} } } }
#define if_modify_int_int(name, type_1, var_1, type_2, var_2) if (strncmp(buf, "modify ", 7) == 0) { \ #define if_modify_int_int(name, type_1, var_1, type_2, var_2) if (strncmp(buf, "modify ", 7) == 0) { \
@@ -97,7 +102,7 @@ extern int __real_shm_unlink(const char *);
var_1 = (type_1)val_1; \ var_1 = (type_1)val_1; \
var_2 = (type_2)val_2; \ var_2 = (type_2)val_2; \
} else { \ } else { \
fprintf(stderr, "intercept: " #name ": invalid args in modify command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in modify command: '%s'\n", #name, buf + 7); \
} } } }
#define if_modify_int_int_int(name, type_1, var_1, type_2, var_2, type_3, var_3) if (strncmp(buf, "modify ", 7) == 0) { \ #define if_modify_int_int_int(name, type_1, var_1, type_2, var_2, type_3, var_3) if (strncmp(buf, "modify ", 7) == 0) { \
@@ -114,7 +119,7 @@ extern int __real_shm_unlink(const char *);
var_2 = (type_2)val_2; \ var_2 = (type_2)val_2; \
var_3 = (type_3)val_3; \ var_3 = (type_3)val_3; \
} else { \ } else { \
fprintf(stderr, "intercept: " #name ": invalid args in modify command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in modify command: '%s'\n", #name, buf + 7); \
} } } }
#define if_return if (strcmp(buf, "return") == 0) { \ #define if_return if (strcmp(buf, "return") == 0) { \
@@ -128,7 +133,7 @@ extern int __real_shm_unlink(const char *);
msg("return %i", val); \ msg("return %i", val); \
return val; \ return val; \
} else { \ } else { \
fprintf(stderr, "intercept: " #name ": invalid args in return command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in return command: '%s'\n", #name, buf + 7); \
} } } }
#define if_return_int_errno(name) if (strncmp(buf, "return ", 7) == 0) { \ #define if_return_int_errno(name) if (strncmp(buf, "return ", 7) == 0) { \
@@ -138,7 +143,7 @@ extern int __real_shm_unlink(const char *);
msg("return %i; errno %s", val, strerrorname_np(errno)); \ msg("return %i; errno %s", val, strerrorname_np(errno)); \
return val; \ return val; \
} else { \ } else { \
fprintf(stderr, "intercept: " #name ": invalid args in return command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in return command: '%s'\n", #name, buf + 7); \
} } } }
#define if_return_int_errno_int(name, type_1, var_1, name_1) if (strncmp(buf, "return ", 7) == 0) { \ #define if_return_int_errno_int(name, type_1, var_1, name_1) if (strncmp(buf, "return ", 7) == 0) { \
@@ -150,10 +155,10 @@ extern int __real_shm_unlink(const char *);
end_ptr_2 != NULL && end_ptr_2[0] == 0 && end_ptr_2 != end_ptr_1 + 1) \ end_ptr_2 != NULL && end_ptr_2[0] == 0 && end_ptr_2 != end_ptr_1 + 1) \
{ \ { \
var_1 = (type_1)val_2; \ var_1 = (type_1)val_2; \
msg("return %i; errno %s; " name_1 "=%i", val_1, strerrorname_np(errno), var_1); \ msg("return %i; errno %s; %s=%i", val_1, strerrorname_np(errno), name_1, var_1); \
return val_1; \ return val_1; \
} else { \ } else { \
fprintf(stderr, "intercept: " #name ": invalid args in return command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in return command: '%s'\n", #name, buf + 7); \
} } } }
#define if_return_ptr_errno(name) if (strncmp(buf, "return ", 7) == 0) { \ #define if_return_ptr_errno(name) if (strncmp(buf, "return ", 7) == 0) { \
@@ -163,14 +168,14 @@ extern int __real_shm_unlink(const char *);
msg("return %p; errno %s", val, strerrorname_np(errno)); \ msg("return %p; errno %s", val, strerrorname_np(errno)); \
return (void *)val; \ return (void *)val; \
} else { \ } else { \
fprintf(stderr, "intercept: " #name ": invalid args in return command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in return command: '%s'\n", #name, buf + 7); \
} } } }
#define if_error_1_ptr_errno(name, err1) if (strncmp(buf, "fail ", 5) == 0) { \ #define if_error_1_ptr_errno(name, err1) if (strncmp(buf, "fail ", 5) == 0) { \
if (strcmp(buf + 5, #err1) == 0) { errno = err1; \ if (strcmp(buf + 5, #err1) == 0) { errno = err1; \
} else { \ } else { \
errno = 0; \ errno = 0; \
fprintf(stderr, "intercept: " #name ": invalid error code in fail command: '%s'\n", buf + 5); \ fprintf(stderr, "intercept: %s: invalid error code in fail command: '%s'\n", #name, buf + 5); \
} \ } \
msg("return %p; errno %s", NULL, strerrorname_np(errno)); \ msg("return %p; errno %s", NULL, strerrorname_np(errno)); \
return NULL; } return NULL; }
@@ -179,7 +184,7 @@ extern int __real_shm_unlink(const char *);
if (strcmp(buf + 5, #err1) == 0) { errno = err1; \ if (strcmp(buf + 5, #err1) == 0) { errno = err1; \
} else { \ } else { \
errno = 0; \ errno = 0; \
fprintf(stderr, "intercept: " #name ": invalid error code in fail command: '%s'\n", buf + 5); \ fprintf(stderr, "intercept: %s: invalid error code in fail command: '%s'\n", #name, buf + 5); \
} \ } \
msg("return %i; errno %s", -1, strerrorname_np(errno)); \ msg("return %i; errno %s", -1, strerrorname_np(errno)); \
return -1; } return -1; }
@@ -189,7 +194,7 @@ extern int __real_shm_unlink(const char *);
} else if (strcmp(buf + 5, #err2) == 0) { errno = err2; \ } else if (strcmp(buf + 5, #err2) == 0) { errno = err2; \
} else { \ } else { \
errno = 0; \ errno = 0; \
fprintf(stderr, "intercept: " #name ": invalid error code in fail command: '%s'\n", buf + 5); \ fprintf(stderr, "intercept: %s: invalid error code in fail command: '%s'\n", #name, buf + 5); \
} \ } \
msg("return %i; errno %s", -1, strerrorname_np(errno)); \ msg("return %i; errno %s", -1, strerrorname_np(errno)); \
return -1; } return -1; }
@@ -200,7 +205,7 @@ extern int __real_shm_unlink(const char *);
} else if (strcmp(buf + 5, #err3) == 0) { errno = err3; \ } else if (strcmp(buf + 5, #err3) == 0) { errno = err3; \
} else { \ } else { \
errno = 0; \ errno = 0; \
fprintf(stderr, "intercept: " #name ": invalid error code in fail command: '%s'\n", buf + 5); \ fprintf(stderr, "intercept: %s: invalid error code in fail command: '%s'\n", #name, buf + 5); \
} \ } \
msg("return %i; errno %s", -1, strerrorname_np(errno)); \ msg("return %i; errno %s", -1, strerrorname_np(errno)); \
return -1; } return -1; }
@@ -212,10 +217,10 @@ extern int __real_shm_unlink(const char *);
} else if (strcmp(buf + 5, #err4) == 0) { errno = err4; \ } else if (strcmp(buf + 5, #err4) == 0) { errno = err4; \
} else if (strcmp(buf + 5, #err5) == 0) { errno = err5; \ } else if (strcmp(buf + 5, #err5) == 0) { errno = err5; \
} else if (strcmp(buf + 5, #err6) == 0) { errno = err6; \ } else if (strcmp(buf + 5, #err6) == 0) { errno = err6; \
} else if (strcmp(buf + 5, #err6) == 0) { errno = err7; \ } else if (strcmp(buf + 5, #err7) == 0) { errno = err7; \
} else { \ } else { \
errno = 0; \ errno = 0; \
fprintf(stderr, "intercept: " #name ": invalid error code in fail command: '%s'\n", buf + 5); \ fprintf(stderr, "intercept: %s: invalid error code in fail command: '%s'\n", #name, buf + 5); \
} \ } \
msg("return %i; errno %s", -1, strerrorname_np(errno)); \ msg("return %i; errno %s", -1, strerrorname_np(errno)); \
return -1; } return -1; }
@@ -231,11 +236,29 @@ extern int __real_shm_unlink(const char *);
} else if (strcmp(buf + 5, #err8) == 0) { errno = err8; \ } else if (strcmp(buf + 5, #err8) == 0) { errno = err8; \
} else { \ } else { \
errno = 0; \ errno = 0; \
fprintf(stderr, "intercept: " #name ": invalid error code in fail command: '%s'\n", buf + 5); \ fprintf(stderr, "intercept: %s: invalid error code in fail command: '%s'\n", #name, buf + 5); \
} \ } \
msg("return %p; errno %s", NULL, strerrorname_np(errno)); \ msg("return %p; errno %s", NULL, strerrorname_np(errno)); \
return NULL; } return NULL; }
#define if_error_10_map_errno(name, err1, err2, err3, err4, err5, err6, err7, err8, err9, err10) if (strncmp(buf, "fail ", 5) == 0) { \
if (strcmp(buf + 5, #err1) == 0) { errno = err1; \
} else if (strcmp(buf + 5, #err2) == 0) { errno = err2; \
} else if (strcmp(buf + 5, #err3) == 0) { errno = err3; \
} else if (strcmp(buf + 5, #err4) == 0) { errno = err4; \
} else if (strcmp(buf + 5, #err5) == 0) { errno = err5; \
} else if (strcmp(buf + 5, #err6) == 0) { errno = err6; \
} else if (strcmp(buf + 5, #err7) == 0) { errno = err7; \
} else if (strcmp(buf + 5, #err8) == 0) { errno = err8; \
} else if (strcmp(buf + 5, #err9) == 0) { errno = err9; \
} else if (strcmp(buf + 5, #err10) == 0) { errno = err10; \
} else { \
errno = 0; \
fprintf(stderr, "intercept: %s: invalid error code in fail command: '%s'\n", #name, buf + 5); \
} \
msg("return %i; errno %s", MAP_FAILED, strerrorname_np(errno)); \
return MAP_FAILED; }
static char *strtostr(char *ptr, char **end_ptr, char *buf) { static char *strtostr(char *ptr, char **end_ptr, char *buf) {
if (ptr[0] != '"') return NULL; if (ptr[0] != '"') return NULL;
@@ -479,6 +502,8 @@ static void init(void) {
load(sem_destroy); load(sem_destroy);
load(shm_open); load(shm_open);
load(shm_unlink); load(shm_unlink);
load(mmap);
load(munmap);
#endif #endif
atexit(fin); atexit(fin);
const char *val = getenv("INTERCEPT"); const char *val = getenv("INTERCEPT");
@@ -614,7 +639,7 @@ int sym(getopt)(const int argc, char *const argv[], const char *shortopts) {
if (strncmp(buf, "modify ", 7) == 0) { if (strncmp(buf, "modify ", 7) == 0) {
// modify <argc>,<argv>,<shortopts> // modify <argc>,<argv>,<shortopts>
// TODO getopt modify // TODO getopt modify
fprintf(stderr, "intercept: getopt: modify command not implemented\n"); fprintf(stderr, "intercept: %s: modify command not implemented\n", "getopt");
} else if_return_int(getopt) } else if_return_int(getopt)
else if_invalid(getopt) else if_invalid(getopt)
} }
@@ -717,10 +742,10 @@ int sym(sigaction)(int sig, const struct sigaction *restrict act, struct sigacti
rcv(buf, sizeof(buf)); rcv(buf, sizeof(buf));
if (strncmp(buf, "modify ", 7) == 0) { if (strncmp(buf, "modify ", 7) == 0) {
// TODO sigaction modify // TODO sigaction modify
fprintf(stderr, "intercept: sigaction: modify command not implemented\n"); fprintf(stderr, "intercept: %s: modify command not implemented\n", "sigaction");
} else if (strncmp(buf, "return ", 7) == 0) { } else if (strncmp(buf, "return ", 7) == 0) {
// TODO sigaction return // TODO sigaction return
fprintf(stderr, "intercept: sigaction: return command not implemented\n"); fprintf(stderr, "intercept: %s: return command not implemented\n", "sigaction");
} else if_error_1_int_errno(sigaction, EINVAL) } else if_error_1_int_errno(sigaction, EINVAL)
else if_invalid(sigaction) else if_invalid(sigaction)
} }
@@ -835,7 +860,7 @@ sem_t *sym(sem_open)(const char *name, int oflag, ...) {
value = val_4; value = val_4;
} }
} else { } else {
fprintf(stderr, "intercept: sem_open: invalid args in modify command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in modify command: '%s'\n", "sem_open", buf + 7); \
} }
} else if_return_ptr_errno(sem_open) } else if_return_ptr_errno(sem_open)
else if_error_8_ptr_errno(sem_open, EACCES, EEXIST, EINVAL, EMFILE, ENAMETOOLONG, ENFILE, ENOENT, ENOMEM) else if_error_8_ptr_errno(sem_open, EACCES, EEXIST, EINVAL, EMFILE, ENAMETOOLONG, ENFILE, ENOENT, ENOMEM)
@@ -934,7 +959,7 @@ int sym(sem_timedwait)(sem_t *restrict sem, const struct timespec *restrict abs_
sem = (sem_t *)val_1; sem = (sem_t *)val_1;
abs_timeout = val_2; abs_timeout = val_2;
} else { } else {
fprintf(stderr, "intercept: sem_timedwait: invalid args in modify command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in modify command: '%s'\n", "sem_timedwait", buf + 7); \
} }
} else if_return_int_errno(sem_timedwait) } else if_return_int_errno(sem_timedwait)
else if_error_3_int_errno(sem_timedwait, EINTR, EINVAL, ETIMEDOUT) else if_error_3_int_errno(sem_timedwait, EINTR, EINVAL, ETIMEDOUT)
@@ -1001,7 +1026,7 @@ int sym(sem_unlink)(const char *name) {
if (end_ptr != NULL && end_ptr[0] == 0 && end_ptr != buf + 7) { if (end_ptr != NULL && end_ptr[0] == 0 && end_ptr != buf + 7) {
name = val; name = val;
} else { } else {
fprintf(stderr, "intercept: sem_unlink: invalid args in modify command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in modify command: '%s'\n", "sem_unlink", buf + 7); \
} }
} else if_return_int_errno(sem_unlink) } else if_return_int_errno(sem_unlink)
else if_error_3_int_errno(sem_unlink, EACCES, ENAMETOOLONG, ENOENT) else if_error_3_int_errno(sem_unlink, EACCES, ENAMETOOLONG, ENOENT)
@@ -1038,7 +1063,7 @@ int sym(shm_open)(const char *name, int oflag, mode_t mode_arg) {
if (oflag & O_TRUNC) strcat(ostr, "O_TRUNC|"); if (oflag & O_TRUNC) strcat(ostr, "O_TRUNC|");
if (oflag & ~(O_RDONLY | O_RDWR | O_CREAT | O_EXCL | O_TRUNC)) strcat(ostr, "?|"); if (oflag & ~(O_RDONLY | O_RDWR | O_CREAT | O_EXCL | O_TRUNC)) strcat(ostr, "?|");
msg("shm_open(%es, 0%o:%s, 0%o): %p", name, oflag, ostr, mode_arg, ret_addr); msg("shm_open(%es, 0%o:%s, 0%03o): %p", name, oflag, ostr, mode_arg, ret_addr);
char overwrite[BUFFER_SIZE]; char overwrite[BUFFER_SIZE];
if (mode >= 4) { if (mode >= 4) {
char buf[BUFFER_SIZE]; char buf[BUFFER_SIZE];
@@ -1093,7 +1118,7 @@ int sym(shm_open)(const char *name, int oflag, mode_t mode_arg) {
oflag = (int)val_2; oflag = (int)val_2;
mode_arg = val_3; mode_arg = val_3;
} else { } else {
fprintf(stderr, "intercept: shm_open: invalid args in modify command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in modify command: '%s'\n", "shm_open", buf + 7); \
} }
} else if_return_int_errno(shm_open) } else if_return_int_errno(shm_open)
else if_error_7_int_errno(shm_open, EACCES, EEXIST, EINVAL, EMFILE, ENAMETOOLONG, ENFILE, ENOENT) else if_error_7_int_errno(shm_open, EACCES, EEXIST, EINVAL, EMFILE, ENAMETOOLONG, ENFILE, ENOENT)
@@ -1124,7 +1149,7 @@ int sym(shm_unlink)(const char *name) {
if (end_ptr != NULL && end_ptr[0] == 0 && end_ptr != buf + 7) { if (end_ptr != NULL && end_ptr[0] == 0 && end_ptr != buf + 7) {
name = val; name = val;
} else { } else {
fprintf(stderr, "intercept: shm_unlink: invalid args in modify command: '%s'\n", buf + 7); \ fprintf(stderr, "intercept: %s: invalid args in modify command: '%s'\n", "shm_unlink", buf + 7); \
} }
} else if_return_int_errno(shm_unlink) } else if_return_int_errno(shm_unlink)
else if_error_3_int_errno(shm_unlink, EACCES, ENAMETOOLONG, ENOENT) else if_error_3_int_errno(shm_unlink, EACCES, ENAMETOOLONG, ENOENT)
@@ -1134,3 +1159,50 @@ int sym(shm_unlink)(const char *name) {
msg("return %i; errno %s", ret, strerrorname_np(errno)); msg("return %i; errno %s", ret, strerrorname_np(errno));
return ret; return ret;
} }
void *sym(mmap)(void *addr, size_t len, int prot, int flags, int fildes, off_t off) {
init();
char pstr[64] = "|";
if (prot == PROT_NONE) strcat(pstr, "PROT_NONE|");
if (prot & PROT_READ) strcat(pstr, "PROT_READ|");
if (prot & PROT_WRITE) strcat(pstr, "PROT_WRITE|");
if (prot & PROT_EXEC) strcat(pstr, "PROT_EXEC|");
if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) strcat(pstr, "?|");
char fstr[64] = "|";
if (prot & MAP_SHARED) strcat(fstr, "MAP_SHARED|");
if (prot & MAP_PRIVATE) strcat(fstr, "MAP_PRIVATE|");
if (prot & MAP_FIXED) strcat(fstr, "MAP_FIXED|");
if (prot & MAP_ANONYMOUS) strcat(fstr, "MAP_ANONYMOUS|");
if (prot & ~(MAP_SHARED | MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS)) strcat(fstr, "?|");
msg("mmap(%p, %i, 0x%x:%s, %0x%x:%s, %i, %i): %p", addr, len, prot, pstr, flags, fstr, fildes, off, ret_addr);
if (mode >= 4) {
char buf[BUFFER_SIZE];
rcv(buf, sizeof(buf));
if (strncmp(buf, "modify ", 7) == 0) {
// TODO mmap modify
fprintf(stderr, "intercept: %s: modify command not implemented\n", "mmap");
} else if_return_ptr_errno(mmap)
else if_error_10_map_errno(mmap, EACCES, EAGAIN, EBADF, EINVAL, EMFILE, ENODEV, ENOMEM, ENOTSUP, ENXIO, EOVERFLOW)
else if_invalid(mmap)
}
void *ret = __real_mmap(addr, len, prot, flags, fildes, off);
msg("return %p; errno %s", ret, strerrorname_np(errno));
return ret;
}
int sym(munmap)(void *addr, size_t len) {
init();
msg("munmap(%p, %i): %p", addr, len, ret_addr);
if (mode >= 4) {
char buf[BUFFER_SIZE];
rcv(buf, sizeof(buf));
if_modify_int_int(munmap, void *, addr, size_t, len)
else if_return_int_errno(munmap)
else if_error_1_int_errno(munmap, EINVAL)
else if_invalid(munmap)
}
const int ret = __real_munmap(addr, len);
msg("return %i; errno %s", ret, strerrorname_np(errno));
return ret;
}