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contributed by <datuiji>
NAME="Ubuntu"
VERSION="16.04.5 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.5 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial
--- Trace Points
+++ TESTING trace trace-01-ops:
# Test of insert_head and remove_head
--- trace-01-ops 6/6
+++ TESTING trace trace-02-ops:
# Test of insert_head, insert_tail, and remove_head
--- trace-02-ops 6/6
+++ TESTING trace trace-03-ops:
# Test of insert_head, insert_tail, reverse, and remove_head
--- trace-03-ops 6/6
+++ TESTING trace trace-04-ops:
# Test of insert_head, insert_tail, and size
--- trace-04-ops 6/6
+++ TESTING trace trace-05-ops:
# Test of insert_head, insert_tail, remove_head reverse, and size
--- trace-05-ops 6/6
+++ TESTING trace trace-06-string:
# Test of truncated strings
--- trace-06-string 7/7
+++ TESTING trace trace-07-robust:
# Test operations on NULL queue
--- trace-07-robust 7/7
+++ TESTING trace trace-08-robust:
# Test operations on empty queue
--- trace-08-robust 7/7
+++ TESTING trace trace-09-robust:
# Test remove_head with NULL argument
--- trace-09-robust 7/7
+++ TESTING trace trace-10-malloc:
# Test of malloc failure on new
--- trace-10-malloc 7/7
+++ TESTING trace trace-11-malloc:
# Test of malloc failure on insert_head
--- trace-11-malloc 7/7
+++ TESTING trace trace-12-malloc:
# Test of malloc failure on insert_tail
--- trace-12-malloc 7/7
+++ TESTING trace trace-13-perf:
# Test performance of insert_tail
--- trace-13-perf 7/7
+++ TESTING trace trace-14-perf:
# Test performance of size
--- trace-14-perf 7/7
+++ TESTING trace trace-15-perf:
# Test performance of insert_tail, size, and reverse
--- trace-15-perf 7/7
--- TOTAL 100/100
/* Queue structure */
typedef struct {
list_ele_t *head; /* Linked list of elements */
list_ele_t *tail;
int size; /*
You will need to add more fields to this structure
to efficiently implement q_size and q_insert_tail
*/
} queue_t;
queue_t *q_new()
{
queue_t *q = malloc(sizeof(queue_t));
/* What if malloc returned NULL? */
if (q == NULL) {
return NULL;
} else {
q->head = NULL;
q->tail = NULL;
q->size = 0;
return q;
}
}
void q_free(queue_t *q)
{
/* How about freeing the list elements and the strings? */
if (q == NULL) {
return;
} else {
while (q->head) {
list_ele_t *temp = q->head;
free(temp->value);
q->head = q->head->next;
free(temp);
}
}
bool q_insert_head(queue_t *q, char *s)
{
/* What should you do if the q is NULL? */
if (q == NULL) {
return false;
} else {
/* Don't forget to allocate space for the string and copy it */
/* What if either call to malloc returns NULL? */
list_ele_t *newh;
newh = malloc(sizeof(list_ele_t));
if (newh == NULL) {
return false;
} else {
newh->value = malloc(sizeof(char) * (strlen(s) + 1));
if (newh->value == NULL) {
free(newh);
return false;
}
strcpy(newh->value, s);
if (q->head == NULL) {
q->head = newh;
q->tail = newh;
newh->next = NULL;
} else {
newh->next = q->head;
q->head = newh;
}
q->size++;
return true;
}
}
}
bool q_insert_head(queue_t *q, char *s)
{
/* What should you do if the q is NULL? */
if(q == NULL){
return false;
}
else{
/* Don't forget to allocate space for the string and copy it */
/* What if either call to malloc returns NULL? */
list_ele_t *newh;
newh = malloc(sizeof(list_ele_t));
if(newh == NULL){
return false;
}
else{
newh->value = strdup(s);
if(q->head == NULL){
q->head = newh;
q->tail = newh;
newh->next = NULL;
}
else{
newh->next = q->head;
q->head = newh;
}
q->size++;
return true;
}
}
}
+++ TESTING trace trace-01-ops:
# Test of insert_head and remove_head
ERROR: Attempted to free unallocated block. Address = 0xc56500
ERROR: Attempted to free unallocated or corrupted block. Address = 0xc56500
ERROR: Segmentation fault occurred. You dereferenced a NULL or invalid pointer
ERROR: Removal from queue failed (1 failures total)
ERROR: Attempted to free unallocated block. Address = 0xc56520
ERROR: Attempted to free unallocated or corrupted block. Address = 0xc56520
ERROR: Corruption detected in block with address 0xc56520 when attempting to free it
ERROR: Segmentation fault occurred. You dereferenced a NULL or invalid pointer
ERROR: Removal from queue failed (2 failures total)
ERROR: Attempted to free unallocated block. Address = 0xc56560
ERROR: Attempted to free unallocated or corrupted block. Address = 0xc56560
ERROR: Corruption detected in block with address 0xc56560 when attempting to free it
ERROR: Segmentation fault occurred. You dereferenced a NULL or invalid pointer
ERROR: Removal from queue failed (3 failures total)
--- trace-01-ops 0/6
bool q_insert_tail(queue_t *q, char *s)
{
/* You need to write the complete code for this function */
/* Remember: It should operate in O(1) time */
if (q == NULL) {
return false;
} else {
list_ele_t *newh;
newh = malloc(sizeof(list_ele_t));
if (newh == NULL) {
return false;
} else {
newh->value = malloc(sizeof(char) * (strlen(s) + 1));
if (newh->value == NULL) {
free(newh);
return false;
}
strcpy(newh->value, s);
if (q->head == NULL) {
q->head = newh;
q->tail = newh;
newh->next = NULL;
} else {
q->tail->next = newh;
q->tail = newh;
newh->next = NULL;
}
q->size++;
return true;
}
}
}
bool q_remove_head(queue_t *q, char *sp, size_t bufsize)
{
/* You need to fix up this code. */
if (q == NULL || q->size == 0) {
return false;
} else {
list_ele_t *temp = q->head;
q->head = q->head->next;
if (sp != NULL) {
memset(sp, '\0', bufsize);
strncpy(sp, temp->value, bufsize - 1);
}
free(temp->value);
free(temp);
q->size--;
if (q->size == 0) {
q->tail = NULL;
}
return true;
}
}
bool q_remove_head(queue_t *q, char *sp, size_t bufsize)
{
/* You need to fix up this code. */
if(q == NULL || q->size == 0){
return false;
}
else{
list_ele_t *temp = q->head;
if(temp->value != NULL){
strncpy(sp, temp->value, bufsize);
free(temp->value);
}
q->head = q->head->next;
free(temp);
q->size--;
if(q->size == 0){
q->tail = NULL;
}
return true;
}
}
+++ TESTING trace trace-06-string:
# Test of truncated strings
ERROR: Removed value meerkat_panda_squirrel_vulture_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX != expected value meerkat_panda_squirrel_vulture
ERROR: Removed value aardvark_bear_dolphin_gerbil_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX != expected value aardvark_bear_dolphin_gerbil
ERROR: Removed value aardvark_bear_dolphin_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX != expected value aardvark_bear_dolphin
ERROR: Removed value meerkat_panda_squirrel_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX != expected value meerkat_panda_squirrel
ERROR: Removed value meerkat_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX != expected value meerkat
Error limit exceeded. Stopping command execution
--- trace-06-string 0/7
int q_size(queue_t *q)
{
/* You need to write the code for this function */
/* Remember: It should operate in O(1) time */
if (q == NULL) {
return 0;
} else {
return q->size;
}
}
void q_reverse(queue_t *q)
{
/* You need to write the code for this function */
if (q == NULL || q->size == 0) {
return;
}
list_ele_t *pre = NULL;
list_ele_t *cur = q->head;
list_ele_t *next = NULL;
while (cur != NULL) {
next = cur->next;
cur->next = pre;
pre = cur;
cur = next;
}
q->tail = q->head;
q->head = pre;
return;
}
CC = gcc
CFLAGS = -O0 -g -Wall -Werror
GIT_HOOKS := .git/hooks/applied
all: $(GIT_HOOKS) qtest
$(GIT_HOOKS):
@scripts/install-git-hooks
@echo
queue.o: queue.c queue.h harness.h
$(CC) $(CFLAGS) -c queue.c
qtest: qtest.c report.c console.c harness.c queue.o
$(CC) $(CFLAGS) -o qtest qtest.c report.c console.c harness.c queue.o
test: qtest scripts/driver.py
scripts/driver.py
clean:
rm -f *.o *~ qtest
rm -rf *.dSYM
(cd traces; rm -f *~)
#!/usr/bin/python
import subprocess
import sys
import getopt
# Driver program for C programming exercise
class Tracer:
traceDirectory = "./traces"
qtest = "./qtest"
verbLevel = 0
autograde = False
traceDict = {
1 : "trace-01-ops",
2 : "trace-02-ops",
3 : "trace-03-ops",
4 : "trace-04-ops",
5 : "trace-05-ops",
6 : "trace-06-string",
7 : "trace-07-robust",
8 : "trace-08-robust",
9 : "trace-09-robust",
10 : "trace-10-malloc",
11 : "trace-11-malloc",
12 : "trace-12-malloc",
13 : "trace-13-perf",
14 : "trace-14-perf",
15 : "trace-15-perf"
}
traceProbs = {
1 : "Trace-01",
2 : "Trace-02",
3 : "Trace-03",
4 : "Trace-04",
5 : "Trace-05",
6 : "Trace-06",
7 : "Trace-07",
8 : "Trace-08",
9 : "Trace-09",
10 : "Trace-10",
11 : "Trace-11",
12 : "Trace-12",
13 : "Trace-13",
14 : "Trace-14",
15 : "Trace-15"
}
maxScores = [0, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]
def __init__(self, qtest = "", verbLevel = 0, autograde = False):
if qtest != "":
self.qtest = qtest
self.verbLevel = verbLevel
self.autograde = autograde
def runTrace(self, tid):
if not tid in self.traceDict:
print("ERROR: No trace with id %d" % tid)
return False
fname = "%s/%s.cmd" % (self.traceDirectory, self.traceDict[tid])
vname = "%d" % self.verbLevel
clist = [self.qtest, "-v", vname, "-f", fname]
try:
retcode = subprocess.call(clist)
except Exception as e:
print("Call of '%s' failed: %s" % (" ".join(clist), e))
return False
return retcode == 0
def run(self, tid = 0):
scoreDict = { k : 0 for k in self.traceDict.keys() }
print("---\tTrace\t\tPoints")
if tid == 0:
tidList = self.traceDict.keys()
else:
if not tid in self.traceDict:
print("ERROR: Invalid trace ID %d" % tid)
return
tidList = [tid]
score = 0
maxscore = 0
for t in tidList:
tname = self.traceDict[t]
if self.verbLevel > 0:
print("+++ TESTING trace %s:" % tname)
ok = self.runTrace(t)
maxval = self.maxScores[t]
tval = maxval if ok else 0
print("---\t%s\t%d/%d" % (tname, tval, maxval))
score += tval
maxscore += maxval
scoreDict[t] = tval
print("---\tTOTAL\t\t%d/%d" % (score, maxscore))
if self.autograde:
# Generate JSON string
jstring = '{"scores": {'
first = True
for k in scoreDict.keys():
if not first:
jstring += ', '
first = False
jstring += '"%s" : %d' % (self.traceProbs[k], scoreDict[k])
jstring += '}}'
print(jstring)
def usage(name):
print("Usage: %s [-h] [-p PROG] [-t TID] [-v VLEVEL]" % name)
print(" -h Print this message")
print(" -p PROG Program to test")
print(" -t TID Trace ID to test")
print(" -v VLEVEL Set verbosity level (0-3)")
sys.exit(0)
def run(name, args):
prog = ""
tid = 0
vlevel = 1
levelFixed = False
autograde = False
optlist, args = getopt.getopt(args, 'hp:t:v:A')
for (opt, val) in optlist:
if opt == '-h':
usage(name)
elif opt == '-p':
prog = val
elif opt == '-t':
tid = int(val)
elif opt == '-v':
vlevel = int(val)
levelFixed = True
elif opt == '-A':
autograde = True
else:
print("Unrecognized option '%s'" % opt)
usage(name)
if not levelFixed and autograde:
vlevel = 0
t = Tracer(qtest = prog, verbLevel = vlevel, autograde = autograde)
t.run(tid)
if __name__ == "__main__":
run(sys.argv[0], sys.argv[1:])
2.5. Adding Commands to GDB
As noted in Section 2.2, GDB's command handling is extensible. Commands are grouped into a number of command lists (of type struct cmd_list_element), pointed to by a number of global variables (defined in cli-cmds.h). Of these, cmdlist is the list of all defined commands, with separate lists defined for sub-commands of various top level commands. For example infolist is the list of all info sub-commands.
Each command (or sub-command) is associated with a callback function which implements the behavior of the functions. There are additional requirements for functions which set or show values within GDB. Each function also takes a documentation string (used by the help command). Functions for adding commands all return a pointer to the struct cmd_list_element for the command added (which is not necessarily the head of its command list). The most useful functions are:
add_cmd. Add a function to a command list.
add_com. Add a function to the main command list, cmdlist. This is a convenience wrapper for add_cmd.
add_prefix_cmd. Add a new prefix command. This command should have its own function for use if it is called on its own, and a global command list pointer specific to the prefix command to which all its sub-commands will be added. If a prefix command is called with an unknown sub-command, it can either give an error or call the function of the prefix command itself. Which of these is used is specified by a flag in the call to add_prefix_cmd.
add_alias_cmd. Add an alias for a command already defined.
add_info. Add a sub-command to the info. A convenience wrapper for add_cmd.
New commands are usually added in the _initialize_arch function after the struct gdbarch has been defined.
static void console_init()
{
add_cmd("new", do_new, " | Create new queue");
add_cmd("free", do_free, " | Delete queue");
add_cmd("ih", do_insert_head,
" str [n] | Insert string str at head of queue n times "
"(default: n == 1)");
add_cmd("it", do_insert_tail,
" str [n] | Insert string str at tail of queue n times "
"(default: n == 1)");
add_cmd("rh", do_remove_head,
" [str] | Remove from head of queue. Optionally compare "
"to expected value str");
add_cmd(
"rhq", do_remove_head_quiet,
" | Remove from head of queue without reporting value.");
add_cmd("reverse", do_reverse, " | Reverse queue");
add_cmd("size", do_size,
" [n] | Compute queue size n times (default: n == 1)");
add_cmd("show", do_show, " | Show queue contents");
add_param("length", &string_length, "Maximum length of displayed string",
NULL);
add_param("malloc", &fail_probability, "Malloc failure probability percent",
NULL);
add_param("fail", &fail_limit,
"Number of times allow queue operations to return false", NULL);
}
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