Merge branch 'develop' into feature-34-test_framework

cmake_targets/CMakeLists.txt

@@ -238,6 +238,7 @@ add_boolean_option(TEST_OMG            False "???")
 add_boolean_option(DEBUG_OMG           False "???")
 add_boolean_option(XFORMS              False "This adds the possibility to see the signal oscilloscope")
 add_boolean_option(PRINT_STATS         False "This adds the possibility to see the status")
+add_boolean_option(T_TRACER            False "Activate the T tracer, a debugging/monitoring framework" )
 
 add_boolean_option(DEBUG_CONSOLE False "makes debugging easier, disables stdout/stderr buffering")
 
@@ -1559,6 +1560,36 @@ endif (${XFORMS})
 
 set(CMAKE_MODULE_PATH "${OPENAIR_DIR}/cmake_targets/tools/MODULES" "${CMAKE_MODULE_PATH}")
 
+#include T directory even if the T is off because T macros are in the code
+#no matter what
+include_directories("${OPENAIR_DIR}/common/utils/T")
+
+if (${T_TRACER})
+  set(T_SOURCE
+      ${OPENAIR_DIR}/common/utils/T/T.c
+      ${OPENAIR_DIR}/common/utils/T/local_tracer.c)
+  set (T_LIB "rt")
+endif (${T_TRACER})
+
+#Some files in the T directory are generated.
+#This rule and the following deal with it.
+add_custom_command (
+  OUTPUT ${OPENAIR_DIR}/common/utils/T/T_IDs.h
+  COMMAND make
+  WORKING_DIRECTORY ${OPENAIR_DIR}/common/utils/T
+  DEPENDS ${OPENAIR_DIR}/common/utils/T/T_messages.txt
+  )
+
+#This rule is specifically needed to generate T files
+#before anything else in a project that uses the T.
+#See below, there are some 'add_dependencies' showing that.
+#Basically we create a custom target and we make other
+#targets depend on it. That forces cmake to generate
+#T files before anything else.
+add_custom_target (
+  generate_T
+  DEPENDS ${OPENAIR_DIR}/common/utils/T/T_IDs.h
+)
 
 # Hack on a test of asn1c version (already dirty)
 add_definitions(-DASN1_MINIMUM_VERSION=924)
@@ -1591,6 +1622,7 @@ add_executable(lte-softmodem
   ${RTAI_SOURCE}
   ${XFORMS_SOURCE}
   ${XFORMS_SOURCE_SOFTMODEM}
+  ${T_SOURCE}
   )
 
 target_link_libraries (lte-softmodem
@@ -1603,6 +1635,7 @@ target_link_libraries (lte-softmodem ${LIBXML2_LIBRARIES})
 target_link_libraries (lte-softmodem pthread m ${CONFIG_LIBRARIES} rt crypt ${CRYPTO_LIBRARIES} ${OPENSSL_LIBRARIES} ${NETTLE_LIBRARIES} sctp ${option_HW_lib} ${option_TP_lib} ${XFORMS_LIBRARIES} ) 
 target_link_libraries (lte-softmodem ${LIBBOOST_LIBRARIES})
 target_link_libraries (lte-softmodem ${LIB_LMS_LIBRARIES})
+target_link_libraries (lte-softmodem ${T_LIB})
 
 # lte-softmodem-nos1 is both eNB and UE implementation
 ###################################################
@@ -1627,6 +1660,7 @@ add_executable(lte-softmodem-nos1
   ${RTAI_SOURCE}
   ${XFORMS_SOURCE}
   ${XFORMS_SOURCE_SOFTMODEM}
+  ${T_SOURCE}
   )
 target_link_libraries (lte-softmodem-nos1
   -Wl,--start-group
@@ -1637,6 +1671,7 @@ target_link_libraries (lte-softmodem-nos1 ${LIBXML2_LIBRARIES})
 target_link_libraries (lte-softmodem-nos1 pthread m ${CONFIG_LIBRARIES} rt crypt ${CRYPTO_LIBRARIES} ${OPENSSL_LIBRARIES} ${NETTLE_LIBRARIES}  ${option_HW_lib}  ${option_TP_lib} ${XFORMS_LIBRARIES} )
 target_link_libraries (lte-softmodem-nos1 ${LIBBOOST_LIBRARIES})
 target_link_libraries (lte-softmodem-nos1  ${LIB_LMS_LIBRARIES})
+target_link_libraries (lte-softmodem ${T_LIB})
 
 # rrh
 ################################
@@ -1649,6 +1684,7 @@ add_executable(rrh_gw
   ${OPENAIR_TARGETS}/ARCH/COMMON/common_lib.c		
   ${HW_SOURCE}
   ${TRANSPORT_SOURCE}  
+  ${T_SOURCE}
   )
 target_include_directories(rrh_gw PRIVATE  ${OPENAIR_DIR}/common/utils/itti)
 target_link_libraries(rrh_gw
@@ -1658,6 +1694,7 @@ target_link_libraries(rrh_gw
 target_link_libraries (rrh_gw rt pthread m )
 target_link_libraries (rrh_gw  ${option_HW_lib} ${option_TP_lib} ${LIBBOOST_LIBRARIES} )
 target_link_libraries (rrh_gw ${LIB_LMS_LIBRARIES})
+target_link_libraries (rrh_gw ${T_LIB})
 
 Message("-- option_HW_lib=${option_HW_lib}")
 Message("-- HW_SOURCE=${HW_SOURCE}")
@@ -1723,6 +1760,7 @@ add_executable(oaisim
   ${HW_SOURCE}
   ${TRANSPORT_SOURCE}  
   ${XFORMS_SOURCE}
+  ${T_SOURCE}
 )
 
 
@@ -1737,6 +1775,7 @@ target_link_libraries (oaisim pthread m ${CONFIG_LIBRARIES} rt crypt ${CRYPTO_LI
   ${ATLAS_LIBRARIES} ${XFORMS_LIBRARIES} ${OPENPGM_LIBRARIES})
 #Force link with forms, regardless XFORMS option
 target_link_libraries (oaisim forms)
+target_link_libraries (oaisim ${T_LIB})
 
 
 
@@ -1762,6 +1801,7 @@ add_executable(oaisim_nos1
   ${HW_SOURCE}
   ${TRANSPORT_SOURCE}  
   ${XFORMS_SOURCE}
+  ${T_SOURCE}
 )
 target_include_directories(oaisim_nos1 PUBLIC  ${OPENAIR_TARGETS}/SIMU/USER)
 target_link_libraries (oaisim_nos1
@@ -1774,7 +1814,7 @@ target_link_libraries (oaisim_nos1 pthread m ${CONFIG_LIBRARIES} rt crypt ${CRYP
   ${ATLAS_LIBRARIES} ${XFORMS_LIBRARIES} ${OPENPGM_LIBRARIES})
 #Force link with forms, regardless XFORMS option
 target_link_libraries (oaisim_nos1 forms)
-
+target_link_libraries (oaisim_nos1 ${T_LIB})
 
 # Unitary tests for each piece of L1: example, mbmssim is MBMS L1 simulator
 #####################################
@@ -1784,10 +1824,11 @@ foreach(myExe dlsim ulsim pbchsim scansim mbmssim pdcchsim pucchsim prachsim syn
     ${OPENAIR_BIN_DIR}/messages_xml.h
     ${OPENAIR1_DIR}/SIMULATION/LTE_PHY/${myExe}.c
     ${XFORMS_SOURCE}
+    ${T_SOURCE}
     )
   target_link_libraries (${myExe}
     -Wl,--start-group SIMU UTIL SCHED_LIB PHY LFDS ${ITTI_LIB} -Wl,--end-group
-    pthread m rt ${CONFIG_LIBRARIES} ${ATLAS_LIBRARIES} ${XFORMS_LIBRARIES}
+    pthread m rt ${CONFIG_LIBRARIES} ${ATLAS_LIBRARIES} ${XFORMS_LIBRARIES} ${T_LIB}
     )
 endforeach(myExe)
 
@@ -1852,8 +1893,23 @@ endforeach(myExe)
 #../targets/TEST/PDCP/test_pdcp.c
 #../targets/TEST/PDCP/with_rlc/test_pdcp_rlc.c
 
-
-
+#ensure that the T header files are generated before targets depending on them
+if (${T_TRACER})
+  add_dependencies(lte-softmodem generate_T)
+  add_dependencies(lte-softmodem-nos1 generate_T)
+  add_dependencies(rrh_gw generate_T)
+  add_dependencies(oaisim generate_T)
+  add_dependencies(oaisim_nos1 generate_T)
+  add_dependencies(dlsim generate_T)
+  add_dependencies(ulsim generate_T)
+  add_dependencies(pbchsim generate_T)
+  add_dependencies(scansim generate_T)
+  add_dependencies(mbmssim generate_T)
+  add_dependencies(pdcchsim generate_T)
+  add_dependencies(pucchsim generate_T)
+  add_dependencies(prachsim generate_T)
+  add_dependencies(syncsim generate_T)
+endif (${T_TRACER})
 
 ##################################################
 # Generated specific cases is not regular code

cmake_targets/build_oai

@@ -58,6 +58,7 @@ CFLAGS_PROCESSOR_USER=""
 RUN_GROUP=0
 TEST_CASE_GROUP=""
 BUILD_DOXYGEN=0
+T_TRACER="False"
 trap handle_ctrl_c INT
 
 function print_help() {
@@ -128,6 +129,8 @@ Options
    Enable deadline scheduler of Linux kernel (>=3.14.x). 
 --disable-cpu-affinity
    Disables CPU Affinity between UHD/TX/RX Threads (Valid only when deadline scheduler is disabled). By defaulT, CPU Affinity is enabled when not using deadline scheduler. It is enabled only with >2 CPUs. For eNB, CPU_0-> Device library (UHD), CPU_1->TX Threads, CPU_2...CPU_MAX->Rx Threads. For UE, CPU_0->Device Library(UHD), CPU_1..CPU_MAX -> All the UE threads
+--T-tracer
+   Enables the T tracer.
 Usage (first build):
  oaisim (eNB + UE): ./build_oai -I -g --oaisim -x --install-system-files
  Eurecom EXMIMO + COTS UE : ./build_oai -I -g --eNB -x --install-system-files
@@ -270,6 +273,10 @@ function main() {
             CPU_AFFINITY_FLAG_USER="False"
             echo_info "Disabling CPU Affinity (only valid when not using deadline scheduler)"
             shift 1;;
+       --T-tracer)
+            T_TRACER="True"
+            echo_info "Enabling the T tracer"
+            shift 1;;
         -h | --help)
             print_help
             exit 1;;
@@ -434,6 +441,7 @@ function main() {
     echo "set(PACKAGE_NAME \"${lte_exec}\")"       >>  $cmake_file
     echo "set (DEADLINE_SCHEDULER \"${DEADLINE_SCHEDULER_FLAG_USER}\" )"    >>$cmake_file
     echo "set (CPU_AFFINITY \"${CPU_AFFINITY_FLAG_USER}\" )"      >>$cmake_file
+    echo "set ( T_TRACER $T_TRACER )"              >>  $cmake_file
     echo 'include(${CMAKE_CURRENT_SOURCE_DIR}/../CMakeLists.txt)' >> $cmake_file
     cd  $DIR/$lte_build_dir/build
     cmake ..
@@ -567,6 +575,7 @@ function main() {
     echo "set ( PRINT_STATS $PRINT_STATS )" >>  $cmake_file
     echo "set ( RRC_ASN1_VERSION \"${REL}\")" >>  $cmake_file
     echo "set ( ENABLE_VCD_FIFO $VCD_TIMING )" >>  $cmake_file
+    echo "set ( T_TRACER $T_TRACER )"          >>  $cmake_file
     echo 'include(${CMAKE_CURRENT_SOURCE_DIR}/../CMakeLists.txt)' >> $cmake_file
     [ "$CLEAN" = "1" ] && rm -rf $DIR/$oaisim_build_dir/build
     mkdir -p $DIR/$oaisim_build_dir/build
@@ -632,6 +641,7 @@ function main() {
     echo "set(XFORMS $XFORMS )" >>  $cmake_file
     echo "set(RRC_ASN1_VERSION \"${REL}\")" >>  $cmake_file
     echo "set(ENABLE_VCD_FIFO $VCD_TIMING )" >>  $cmake_file
+    echo "set ( T_TRACER $T_TRACER )"        >>  $cmake_file
     echo 'include(${CMAKE_CURRENT_SOURCE_DIR}/../CMakeLists.txt)' >> $cmake_file
     #[ "$CLEAN" = "1" ] && rm -rf $DIR/oaisim_mme_build_oai/build
     #mkdir -p $DIR/oaisim_mme_build_oai/build
@@ -662,6 +672,7 @@ function main() {
      echo 'set(PACKAGE_NAME "\"rrh_gw\"")'        >>  $cmake_file
      echo "set (DEADLINE_SCHEDULER \"${DEADLINE_SCHEDULER_FLAG_USER}\" )"    >>$cmake_file
      echo "set (CPU_AFFINITY \"${CPU_AFFINITY_FLAG_USER}\" )"    >>$cmake_file
+     echo "set ( T_TRACER $T_TRACER )"            >>  $cmake_file
      echo 'include(${CMAKE_CURRENT_SOURCE_DIR}/../CMakeLists.txt)' >> $cmake_file    
      cd $DIR/$rrh_build_dir/build
      cmake ..

common/utils/T/Makefile

+CC=gcc
+CFLAGS=-Wall -g
+
+GENIDS=genids
+GENIDS_OBJS=genids.o
+
+all : $(GENIDS) T_messages.txt.h T_IDs.h
+
+$(GENIDS): $(GENIDS_OBJS)
+	$(CC) $(CFLAGS) -o $(GENIDS) $(GENIDS_OBJS)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+T_messages.txt.h: T_messages.txt
+	xxd -i T_messages.txt > T_messages.txt.h
+
+T_IDs.h: $(GENIDS) T_messages.txt
+	./$(GENIDS) T_messages.txt T_IDs.h
+
+clean:
+	rm -f *.o $(GENIDS) core T_IDs.h T_messages.txt.h
+	cd tracer && make clean

common/utils/T/T.c

+#include "T.h"
+#include "T_messages.txt.h"
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+
+#define QUIT(x) do { \
+  printf("T tracer: QUIT: %s\n", x); \
+  exit(1); \
+} while (0)
+
+/* array used to activate/disactivate a log */
+static int T_IDs[T_NUMBER_OF_IDS];
+int *T_active = T_IDs;
+
+static int T_socket;
+
+/* T_cache
+ * - the T macro picks up the head of freelist and marks it busy
+ * - the T sender thread periodically wakes up and sends what's to be sent
+ */
+volatile int _T_freelist_head;
+volatile int *T_freelist_head = &_T_freelist_head;
+T_cache_t *T_cache;
+
+static void get_message(int s)
+{
+  char t;
+  int l;
+  int id;
+  int is_on;
+
+  if (read(s, &t, 1) != 1) QUIT("get_message fails");
+printf("got mess %d\n", t);
+  switch (t) {
+  case 0:
+    /* toggle all those IDs */
+    /* optimze? (too much syscalls) */
+    if (read(s, &l, sizeof(int)) != sizeof(int)) QUIT("get_message fails");
+    while (l) {
+      if (read(s, &id, sizeof(int)) != sizeof(int)) QUIT("get_message fails");
+      T_IDs[id] = 1 - T_IDs[id];
+      l--;
+    }
+    break;
+  case 1:
+    /* set IDs as given */
+    /* optimize? */
+    if (read(s, &l, sizeof(int)) != sizeof(int)) QUIT("get_message fails");
+    id = 0;
+    while (l) {
+      if (read(s, &is_on, sizeof(int)) != sizeof(int))
+        QUIT("get_message fails");
+      T_IDs[id] = is_on;
+      id++;
+      l--;
+    }
+    break;
+  case 2: break; /* do nothing, this message is to wait for local tracer */
+  }
+}
+
+static void *T_receive_thread(void *_)
+{
+  while (1) get_message(T_socket);
+  return NULL;
+}
+
+static void new_thread(void *(*f)(void *), void *data)
+{
+  pthread_t t;
+  pthread_attr_t att;
+
+  if (pthread_attr_init(&att))
+    { fprintf(stderr, "pthread_attr_init err\n"); exit(1); }
+  if (pthread_attr_setdetachstate(&att, PTHREAD_CREATE_DETACHED))
+    { fprintf(stderr, "pthread_attr_setdetachstate err\n"); exit(1); }
+  if (pthread_create(&t, &att, f, data))
+    { fprintf(stderr, "pthread_create err\n"); exit(1); }
+  if (pthread_attr_destroy(&att))
+    { fprintf(stderr, "pthread_attr_destroy err\n"); exit(1); }
+}
+
+/* defined in local_tracer.c */
+void T_local_tracer_main(int remote_port, int wait_for_tracer,
+    int local_socket);
+
+/* We monitor the tracee and the local tracer processes.
+ * When one dies we forcefully kill the other.
+ */
+#include <sys/types.h>
+#include <sys/wait.h>
+static void monitor_and_kill(int child1, int child2)
+{
+  int child;
+  int status;
+
+  child = wait(&status);
+  if (child == -1) perror("wait");
+  kill(child1, SIGKILL);
+  kill(child2, SIGKILL);
+  exit(0);
+}
+
+void T_init(int remote_port, int wait_for_tracer)
+{
+  int socket_pair[2];
+  int s;
+  int T_shm_fd;
+  unsigned char *buf;
+  int len;
+  int child1, child2;
+
+  if (socketpair(AF_UNIX, SOCK_STREAM, 0, socket_pair))
+    { perror("socketpair"); abort(); }
+
+  /* child1 runs the local tracer and child2 runs the tracee */
+
+  child1 = fork(); if (child1 == -1) abort();
+  if (child1 == 0) {
+    close(socket_pair[1]);
+    T_local_tracer_main(remote_port, wait_for_tracer, socket_pair[0]);
+    exit(0);
+  }
+  close(socket_pair[0]);
+
+  child2 = fork(); if (child2 == -1) abort();
+  if (child2 != 0) {
+    close(socket_pair[1]);
+    monitor_and_kill(child1, child2);
+  }
+
+  s = socket_pair[1];
+  /* wait for first message - initial list of active T events */
+  get_message(s);
+
+  T_socket = s;
+
+  /* setup shared memory */
+  T_shm_fd = shm_open(T_SHM_FILENAME, O_RDWR /*| O_SYNC*/, 0666);
+  shm_unlink(T_SHM_FILENAME);
+  if (T_shm_fd == -1) { perror(T_SHM_FILENAME); abort(); }
+  T_cache = mmap(NULL, T_CACHE_SIZE * sizeof(T_cache_t),
+                 PROT_READ | PROT_WRITE, MAP_SHARED, T_shm_fd, 0);
+  if (T_cache == NULL)
+    { perror(T_SHM_FILENAME); abort(); }
+  close(T_shm_fd);
+
+  new_thread(T_receive_thread, NULL);
+
+  /* trace T_message.txt
+   * Send several messages -1 with content followed by message -2.
+   * We can't use the T macro directly, events -1 and -2 are special.
+   */
+  buf = T_messages_txt;
+  len = T_messages_txt_len;
+  while (len) {
+    int send_size = len;
+    if (send_size > T_PAYLOAD_MAXSIZE - sizeof(int))
+      send_size = T_PAYLOAD_MAXSIZE - sizeof(int);
+    do {
+      T_LOCAL_DATA
+      T_HEADER(T_ID(-1));
+      T_PUT_buffer(1, ((T_buffer){addr:(buf), length:(len)}));
+      T_COMMIT();
+    } while (0);
+    buf += send_size;
+    len -= send_size;
+  }
+  do {
+    T_LOCAL_DATA
+    T_HEADER(T_ID(-2));
+    T_COMMIT();
+  } while (0);
+}

common/utils/T/T_defs.h

+#ifndef _T_defs_H_
+#define _T_defs_H_
+
+/* comment (and recompile everything) to not send time in events */
+#define T_SEND_TIME
+
+/* maximum number of arguments for the T macro */
+#define T_MAX_ARGS 16
+
+/* maximum size of a message - increase if needed */
+#define T_BUFFER_MAX (1024*64)
+
+/* size of the local cache for messages (must be pow(2,something)) */
+#define T_CACHE_SIZE (8192 * 2)
+
+/* maximum number of bytes a message can contain */
+#ifdef T_SEND_TIME
+#  define T_PAYLOAD_MAXSIZE (T_BUFFER_MAX-sizeof(int)-sizeof(struct timespec))
+#else
+#  define T_PAYLOAD_MAXSIZE (T_BUFFER_MAX-sizeof(int))
+#endif
+
+typedef struct {
+  volatile int busy;
+  char buffer[T_BUFFER_MAX];
+  int length;
+} T_cache_t;
+
+#define T_SHM_FILENAME "/T_shm_segment"
+
+/* number of VCD functions (to be kept up to date! see in T_messages.txt) */
+#define VCD_NUM_FUNCTIONS 139
+
+/* number of VCD variables (to be kept up to date! see in T_messages.txt) */
+#define VCD_NUM_VARIABLES 45
+
+/* first VCD function (to be kept up to date! see in T_messages.txt) */
+#define VCD_FIRST_FUNCTION    ((uintptr_t)T_VCD_FUNCTION_RT_SLEEP)
+
+/* first VCD variable (to be kept up to date! see in T_messages.txt) */
+#define VCD_FIRST_VARIABLE    ((uintptr_t)T_VCD_VARIABLE_FRAME_NUMBER_TX_ENB)
+
+#endif /* _T_defs_H_ */

common/utils/T/defs.h

+#ifndef _TRACER_DEFS_H_
+#define _TRACER_DEFS_H_
+
+/* types of plots */
+#define PLOT_VS_TIME   0
+#define PLOT_IQ_POINTS 1
+#define PLOT_MINMAX    2
+
+void new_thread(void *(*f)(void *), void *data);
+
+/* ... is { int count; int type; char *color; } for 'nplots' plots */
+void *make_plot(int width, int height, char *title, int nplots, ...);
+void plot_set(void *plot, float *data, int len, int pos, int pp);
+void iq_plot_set(void *plot, short *data, int len, int pos, int pp);
+void iq_plot_set_sized(void *_plot, short *data, int len, int pp);
+void iq_plot_add_iq_point_loop(void *_plot, short i, short q, int pp);
+void iq_plot_add_energy_point_loop(void *_plot, int e, int pp);
+
+/* returns an opaque pointer - truly a 'database *', see t_data.c */
+void *parse_database(char *filename);
+void dump_database(void *database);
+void list_ids(void *database);
+void list_groups(void *database);
+void on_off(void *d, char *item, int *a, int onoff);
+
+void *forwarder(char *ip, int port);
+void forward(void *forwarder, char *buf, int size);
+void forward_start_client(void *forwarder, int socket);
+
+#endif /* _TRACER_DEFS_H_ */

common/utils/T/generate_Txx.c

+#include <stdio.h>
+
+void print(int n)
+{
+  int i;
+  printf("#define T%d(t", n);
+  for(i=0; i<(n-1)/2; i++) printf(",t%d,x%d", i, i);
+  printf(") \\\n");
+  printf("  do { \\\n");
+  printf("    if (T_ACTIVE(t)) { \\\n");
+  printf("      T_LOCAL_DATA \\\n");
+  printf("      T_HEADER(t); \\\n");
+  for(i=0; i<(n-1)/2; i++) printf("      T_PUT_##t%d(%d, x%d); \\\n", i, i+2, i);
+  printf("      T_COMMIT(); \\\n");
+  printf("    } \\\n");
+  printf("  } while (0)\n");
+  printf("\n");
+}
+
+int main(void)
+{
+  int i;
+  for (i = 11; i <= 33; i+=2) print(i);
+  return 0;
+}

common/utils/T/genids.c

+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+char **unique_ids;
+int unique_ids_size;
+int unique_ids_maxsize;
+
+int cmp(const void *p1, const void *p2)
+{
+  return strcmp(*(char * const *)p1, *(char * const *)p2);
+}
+
+/* return 1 if s was not already known, 0 if it was */
+int new_unique_id(char *s)
+{
+  if (unique_ids_size)
+  if (bsearch(&s, unique_ids, unique_ids_size, sizeof(char *), cmp) != NULL) {
+    printf("FATAL: ID %s is not unique\n", s);
+    return 0;
+  }
+  if (unique_ids_size == unique_ids_maxsize) {
+    unique_ids_maxsize += 256;
+    unique_ids = realloc(unique_ids, unique_ids_maxsize * sizeof(char *));
+    if (unique_ids == NULL) { printf("out of memory\n"); abort(); }
+  }
+  unique_ids[unique_ids_size] = strdup(s);
+  if (unique_ids[unique_ids_size] == NULL)
+    { printf("out of memory\n"); abort(); }
+  unique_ids_size++;
+  qsort(unique_ids, unique_ids_size, sizeof(char *), cmp);
+  return 1;
+}
+
+char *bufname;
+int bufname_size;
+int bufname_maxsize;
+
+void putname(int c)
+{
+  if (bufname_size == bufname_maxsize) {
+    bufname_maxsize += 256;
+    bufname = realloc(bufname, bufname_maxsize);
+    if (bufname == NULL) { printf("memory allocation error\n"); exit(1); }
+  }
+  bufname[bufname_size] = c;
+  bufname_size++;
+}
+
+char *bufvalue;
+int bufvalue_size;
+int bufvalue_maxsize;
+
+void putvalue(int c)
+{
+  if (bufvalue_size == bufvalue_maxsize) {
+    bufvalue_maxsize += 256;
+    bufvalue = realloc(bufvalue, bufvalue_maxsize);
+    if (bufvalue == NULL) { printf("memory allocation error\n"); exit(1); }
+  }
+  bufvalue[bufvalue_size] = c;
+  bufvalue_size++;
+}
+
+void smash_spaces(FILE *f)
+{
+  int c;
+  while (1) {
+    c = fgetc(f);
+    if (isspace(c)) continue;
+    if (c == ' ') continue;
+    if (c == '\t') continue;
+    if (c == '\n') continue;
+    if (c == 10 || c == 13) continue;
+    if (c == '#') {
+      while (1) {
+        c = fgetc(f);
+        if (c == '\n' || c == EOF) break;
+      }
+      continue;
+    }
+    break;
+  }
+  if (c != EOF) ungetc(c, f);
+}
+
+void get_line(FILE *f, char **name, char **value)
+{
+  int c;
+  bufname_size = 0;
+  bufvalue_size = 0;
+  *name = NULL;
+  *value = NULL;
+  smash_spaces(f);
+  c = fgetc(f);
+  while (!(c == '=' || isspace(c) || c == EOF)) { putname(c); c = fgetc(f); }
+  if (c == EOF) return;
+  putname(0);
+  while (!(c == EOF || c == '=')) c = fgetc(f);
+  if (c == EOF) return;
+  smash_spaces(f);
+  c = fgetc(f);
+  while (!(c == 10 || c == 13 || c == EOF)) { putvalue(c); c = fgetc(f); }
+  putvalue(0);
+  if (bufname_size <= 1) return;
+  if (bufvalue_size <= 1) return;
+  *name = bufname;
+  *value = bufvalue;
+}
+
+int main(int n, char **v)
+{
+  FILE *in;
+  FILE *out;
+  char *name;
+  char *value;
+  char *in_name;
+  char *out_name;
+
+  if (n != 3) { printf("gimme <source> <dest>\n"); exit(1); }
+
+  n = 0;
+
+  in_name = v[1];
+  out_name = v[2];
+
+  in = fopen(in_name, "r"); if (in == NULL) { perror(in_name); exit(1); }
+  out = fopen(out_name, "w"); if (out == NULL) { perror(out_name); exit(1); }
+
+  fprintf(out, "/* generated file, do not edit by hand */\n\n");
+
+  while (1) {
+    get_line(in, &name, &value);
+    if (name == NULL) break;
+    printf("name '%s' value '%s'\n", name, value);
+    if (isspace(value[strlen(value)-1])) {
+      printf("bad value '%s' (no space at the end please!)\n", value);
+      unlink(out_name);
+      exit(1);
+    }
+    if (!strcmp(name, "ID")) {
+      if (!new_unique_id(value)) { unlink(out_name); exit(1); }
+      fprintf(out, "#define T_%s T_ID(%d)\n", value, n);
+      n++;
+    }
+  }
+  fprintf(out, "#define T_NUMBER_OF_IDS %d\n", n);
+
+  fclose(in);
+  fclose(out);
+
+  return 0;
+}

common/utils/T/local_tracer.c

+#include <stdio.h>
+#include <string.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <inttypes.h>
+#include <signal.h>
+
+#include "T_defs.h"
+#include "T_IDs.h"
+
+static T_cache_t *T_cache;
+static int T_busylist_head;
+
+typedef struct databuf {
+  char *d;
+  int l;
+  struct databuf *next;
+} databuf;
+
+typedef struct {
+  int socket_local;
+  volatile int socket_remote;
+  int remote_port;
+  pthread_mutex_t lock;
+  pthread_cond_t cond;
+  databuf * volatile head, *tail;
+  uint64_t memusage;
+  uint64_t last_warning_memusage;
+} forward_data;
+
+/****************************************************************************/
+/*                      utility functions                                   */
+/****************************************************************************/
+
+static void new_thread(void *(*f)(void *), void *data)
+{
+  pthread_t t;
+  pthread_attr_t att;
+
+  if (pthread_attr_init(&att))
+    { fprintf(stderr, "pthread_attr_init err\n"); exit(1); }
+  if (pthread_attr_setdetachstate(&att, PTHREAD_CREATE_DETACHED))
+    { fprintf(stderr, "pthread_attr_setdetachstate err\n"); exit(1); }
+  if (pthread_attr_setstacksize(&att, 10000000))
+    { fprintf(stderr, "pthread_attr_setstacksize err\n"); exit(1); }
+  if (pthread_create(&t, &att, f, data))
+    { fprintf(stderr, "pthread_create err\n"); exit(1); }
+  if (pthread_attr_destroy(&att))
+    { fprintf(stderr, "pthread_attr_destroy err\n"); exit(1); }
+}
+
+static int get_connection(char *addr, int port)
+{
+  struct sockaddr_in a;
+  socklen_t alen;
+  int s, t;
+
+  printf("waiting for connection on %s:%d\n", addr, port);
+
+  s = socket(AF_INET, SOCK_STREAM, 0);
+  if (s == -1) { perror("socket"); exit(1); }
+  t = 1;
+  if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &t, sizeof(int)))
+    { perror("setsockopt"); exit(1); }
+
+  a.sin_family = AF_INET;
+  a.sin_port = htons(port);
+  a.sin_addr.s_addr = inet_addr(addr);
+
+  if (bind(s, (struct sockaddr *)&a, sizeof(a))) { perror("bind"); exit(1); }
+  if (listen(s, 5)) { perror("bind"); exit(1); }
+  alen = sizeof(a);
+  t = accept(s, (struct sockaddr *)&a, &alen);
+  if (t == -1) { perror("accept"); exit(1); }
+  close(s);
+
+  printf("connected\n");
+
+  return t;
+}
+
+/****************************************************************************/
+/*                      forward functions                                   */
+/****************************************************************************/
+
+static void *data_sender(void *_f)
+{
+  forward_data *f = _f;
+  databuf *cur;
+  char *buf, *b;
+  int size;
+
+wait:
+  if (pthread_mutex_lock(&f->lock)) abort();
+  while (f->head == NULL)
+    if (pthread_cond_wait(&f->cond, &f->lock)) abort();
+  cur = f->head;
+  buf = cur->d;
+  size = cur->l;
+  f->head = cur->next;
+  f->memusage -= size;
+  if (f->head == NULL) f->tail = NULL;
+  if (pthread_mutex_unlock(&f->lock)) abort();
+  free(cur);
+  goto process;
+
+process:
+  b = buf;
+  if (f->socket_remote != -1)
+  while (size) {
+    int l = write(f->socket_remote, b, size);
+    if (l <= 0) {
+      printf("forward error\n");
+      close(f->socket_remote);
+      f->socket_remote = -1;
+      break;
+    }
+    size -= l;
+    b += l;
+  }
+
+  free(buf);
+
+  goto wait;
+}
+
+static void *forward_remote_messages(void *_f)
+{
+#define PUT(x) do { \
+    if (bufsize == bufmaxsize) { \
+      bufmaxsize += 4096; \
+      buf = realloc(buf, bufmaxsize); \
+      if (buf == NULL) abort(); \
+    } \
+    buf[bufsize] = x; \
+    bufsize++; \
+  } while (0)
+#define PUT_BUF(x, l) do { \
+    char *zz = (char *)(x); \
+    int len = l; \
+    while (len) { PUT(*zz); zz++; len--; } \
+  } while (0)
+
+  forward_data *f = _f;
+  int from;
+  int to;
+  int l, len;
+  char *b;
+  char *buf = NULL;
+  int bufsize = 0;
+  int bufmaxsize = 0;
+  char t;
+
+again:
+
+  while (1) {
+    from = f->socket_remote;
+    to = f->socket_local;
+
+    bufsize = 0;
+
+    /* let's read and process messages */
+    len = read(from, &t, 1); if (len <= 0) goto dead;
+    PUT(t);
+
+    switch (t) {
+    case 0:
+    case 1:
+      /* message 0 and 1: get a length and then 'length' numbers */
+      if (read(from, &len, sizeof(int)) != sizeof(int)) goto dead;
+      PUT_BUF(&len, 4);
+      while (len) {
+        if (read(from, &l, sizeof(int)) != sizeof(int)) goto dead;
+        PUT_BUF(&l, 4);
+        len--;
+      }
+      break;
+
+    case 2: break;
+    default:
+      printf("%s:%d:%s: unhandled message type %d\n",
+          __FILE__, __LINE__, __FUNCTION__, t);
+      abort();
+    }
+
+    b = buf;
+    while (bufsize) {
+      l = write(to, b, bufsize);
+      if (l <= 0) abort();
+      bufsize -= l;
+      b += l;
+    }
+  }
+
+dead:
+  /* socket died, let's stop all traces and wait for another tracer */
+  /* TODO: be careful with those write, they might write less than wanted */
+  buf[0] = 1;
+  if (write(to, buf, 1) != 1) abort();
+  len = T_NUMBER_OF_IDS;
+  if (write(to, &len, sizeof(int)) != sizeof(int)) abort();
+  l = 0;
+  while (len) {
+    if (write(to, &l, sizeof(int)) != sizeof(int)) abort();
+    len--;
+  };
+
+  close(f->socket_remote);
+  f->socket_remote = get_connection("0.0.0.0", f->remote_port);
+  goto again;
+
+  return NULL;
+}
+
+static void *forwarder(int port, int s)
+{
+  forward_data *f;
+
+  f = malloc(sizeof(*f)); if (f == NULL) abort();
+
+  pthread_mutex_init(&f->lock, NULL);
+  pthread_cond_init(&f->cond, NULL);
+
+  f->socket_local = s;
+  f->head = f->tail = NULL;
+
+  f->memusage = 0;
+  f->last_warning_memusage = 0;
+
+  printf("waiting for remote tracer on port %d\n", port);
+
+  f->remote_port = port;
+  f->socket_remote = get_connection("0.0.0.0", port);
+
+  new_thread(data_sender, f);
+  new_thread(forward_remote_messages, f);
+
+  return f;
+}
+
+static void forward(void *_forwarder, char *buf, int size)
+{
+  forward_data *f = _forwarder;
+  int32_t ssize = size;
+  databuf *new;
+
+  new = malloc(sizeof(*new)); if (new == NULL) abort();
+
+  if (pthread_mutex_lock(&f->lock)) abort();
+
+  new->d = malloc(size + 4); if (new->d == NULL) abort();
+  /* put the size of the message at the head */
+  memcpy(new->d, &ssize, 4);
+  memcpy(new->d+4, buf, size);
+  new->l = size+4;
+  new->next = NULL;
+  if (f->head == NULL) f->head = new;
+  if (f->tail != NULL) f->tail->next = new;
+  f->tail = new;
+
+  f->memusage += size+4;
+  /* warn every 100MB */
+  if (f->memusage > f->last_warning_memusage &&
+      f->memusage - f->last_warning_memusage > 100000000) {
+    f->last_warning_memusage += 100000000;
+    printf("WARNING: memory usage is over %"PRIu64"MB\n",
+           f->last_warning_memusage / 1000000);
+  } else
+  if (f->memusage < f->last_warning_memusage &&
+      f->last_warning_memusage - f->memusage > 100000000) {
+    f->last_warning_memusage = (f->memusage/100000000) * 100000000;
+  }
+
+  if (pthread_cond_signal(&f->cond)) abort();
+  if (pthread_mutex_unlock(&f->lock)) abort();
+}
+
+/****************************************************************************/
+/*                      local functions                                     */
+/****************************************************************************/
+
+static void wait_message(void)
+{
+  while (T_cache[T_busylist_head].busy == 0) usleep(1000);
+}
+
+static void init_shm(void)
+{
+  int i;
+  int s = shm_open(T_SHM_FILENAME, O_RDWR | O_CREAT /*| O_SYNC*/, 0666);
+  if (s == -1) { perror(T_SHM_FILENAME); abort(); }
+  if (ftruncate(s, T_CACHE_SIZE * sizeof(T_cache_t)))
+    { perror(T_SHM_FILENAME); abort(); }
+  T_cache = mmap(NULL, T_CACHE_SIZE * sizeof(T_cache_t),
+                 PROT_READ | PROT_WRITE, MAP_SHARED, s, 0);
+  if (T_cache == NULL)
+    { perror(T_SHM_FILENAME); abort(); }
+  close(s);
+
+  /* let's garbage the memory to catch some potential problems
+   * (think multiprocessor sync issues, barriers, etc.)
+   */
+  memset(T_cache, 0x55, T_CACHE_SIZE * sizeof(T_cache_t));
+  for (i = 0; i < T_CACHE_SIZE; i++) T_cache[i].busy = 0;
+}
+
+void T_local_tracer_main(int remote_port, int wait_for_tracer,
+    int local_socket)
+{
+  int s;
+  int port = remote_port;
+  int dont_wait = wait_for_tracer ? 0 : 1;
+  void *f;
+
+  /* write on a socket fails if the other end is closed and we get SIGPIPE */
+  if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) abort();
+
+  init_shm();
+  s = local_socket;
+
+  if (dont_wait) {
+    char t = 2;
+    if (write(s, &t, 1) != 1) abort();
+  }
+
+  f = forwarder(port, s);
+
+  /* read messages */
+  while (1) {
+    wait_message();
+    __sync_synchronize();
+    forward(f, T_cache[T_busylist_head].buffer,
+            T_cache[T_busylist_head].length);
+    T_cache[T_busylist_head].busy = 0;
+    T_busylist_head++;
+    T_busylist_head &= T_CACHE_SIZE - 1;
+  }
+}

common/utils/T/plot.c

+#include "defs.h"
+#include <X11/Xlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include <math.h>
+#include <unistd.h>
+#include <sys/select.h>
+#include <stdarg.h>
+
+typedef struct {
+  float *buf;
+  short *iqbuf;
+  int count;
+  int type;
+  volatile int iq_count;  /* for ULSCH IQ data */
+  int iq_insert_pos;
+  GC g;
+} data;
+
+typedef struct {
+  Display *d;
+  Window w;
+  Pixmap px;
+  GC bg;
+  int width;
+  int height;
+  pthread_mutex_t lock;
+  float zoom;
+  int timer_pipe[2];
+  data *p;             /* list of plots */
+  int nplots;
+} plot;
+
+static void *timer_thread(void *_p)
+{
+  plot *p = _p;
+  char c;
+
+  while (1) {
+    /* more or less 10Hz */
+    usleep(100*1000);
+    c = 1;
+    if (write(p->timer_pipe[1], &c, 1) != 1) abort();
+  }
+
+  return NULL;
+}
+
+static void *plot_thread(void *_p)
+{
+  float v;
+  float *s;
+  int i, j;
+  plot *p = _p;
+  int redraw = 0;
+  int replot = 0;
+  fd_set rset;
+  int xfd = ConnectionNumber(p->d);
+  int maxfd = xfd > p->timer_pipe[0] ? xfd : p->timer_pipe[0];
+  int pp;
+
+  while (1) {
+    while (XPending(p->d)) {
+      XEvent e;
+      XNextEvent(p->d, &e);
+      switch (e.type) {
+      case ButtonPress:
+        /* button 4: zoom out */
+        if (e.xbutton.button == 4) { p->zoom = p->zoom * 1.25; replot = 1; }
+        /* button 5: zoom in */
+        if (e.xbutton.button == 5) { p->zoom = p->zoom * 0.8; replot = 1; }
+        printf("zoom: %f\n", p->zoom);
+        break;
+      case Expose: redraw = 1; break;
+      }
+    }
+
+    if (replot == 1) {
+      replot = 0;
+      redraw = 1;
+
+      if (pthread_mutex_lock(&p->lock)) abort();
+
+      XFillRectangle(p->d, p->px, p->bg, 0, 0, p->width, p->height);
+
+      for (pp = 0; pp < p->nplots; pp++) {
+        if (p->p[pp].type == PLOT_MINMAX) {
+          s = p->p[pp].buf;
+          for (i = 0; i < 512; i++) {
+            int min = *s;
+            int max = *s;
+            for (j = 0; j < p->p[pp].count/512; j++, s++) {
+              if (*s < min) min = *s;
+              if (*s > max) max = *s;
+            }
+            XDrawLine(p->d, p->px, p->p[pp].g, i, 100-min, i, 100-max);
+          }
+        } else if (p->p[pp].type == PLOT_VS_TIME) {
+          for (i = 0; i < p->p[pp].count; i++)
+            p->p[pp].buf[i] =
+                10*log10(1.0+(float)(p->p[pp].iqbuf[2*i]*p->p[pp].iqbuf[2*i]+
+                p->p[pp].iqbuf[2*i+1]*p->p[pp].iqbuf[2*i+1]));
+          s = p->p[pp].buf;
+          for (i = 0; i < 512; i++) {
+            v = 0;
+            for (j = 0; j < p->p[pp].count/512; j++, s++) v += *s;
+            v /= p->p[pp].count/512;
+            XDrawLine(p->d, p->px, p->p[pp].g, i, 100, i, 100-v);
+          }
+        } else if (p->p[pp].type == PLOT_IQ_POINTS) {
+          XPoint pts[p->p[pp].iq_count];
+          int count = p->p[pp].iq_count;
+          for (i = 0; i < count; i++) {
+            pts[i].x = p->p[pp].iqbuf[2*i]*p->zoom/20+50;
+            pts[i].y = -p->p[pp].iqbuf[2*i+1]*p->zoom/20+50;
+          }
+          XDrawPoints(p->d, p->px, p->p[pp].g, pts, count, CoordModeOrigin);
+        }
+      }
+
+      if (pthread_mutex_unlock(&p->lock)) abort();
+    }
+
+    if (redraw) {
+      redraw = 0;
+      XCopyArea(p->d, p->px, p->w, DefaultGC(p->d, DefaultScreen(p->d)),
+                0, 0, p->width, p->height, 0, 0);
+    }
+
+    XFlush(p->d);
+
+    FD_ZERO(&rset);
+    FD_SET(p->timer_pipe[0], &rset);
+    FD_SET(xfd, &rset);
+    if (select(maxfd+1, &rset, NULL, NULL, NULL) == -1) abort();
+    if (FD_ISSET(p->timer_pipe[0], &rset)) {
+      char b[512];
+      if (read(p->timer_pipe[0], b, 512) <= 0) abort();
+      replot = 1;
+    }
+  }
+
+  return NULL;
+}
+
+void *make_plot(int width, int height, char *title, int nplots, ...)
+{
+  plot *p;
+  Display *d;
+  Window w;
+  Pixmap pm;
+  int i;
+  va_list ap;
+  XGCValues gcv;
+
+  p = malloc(sizeof(*p)); if (p == NULL) abort();
+
+  d = XOpenDisplay(0); if (d == NULL) abort();
+  w = XCreateSimpleWindow(d, DefaultRootWindow(d), 0, 0, width, height,
+        0, WhitePixel(d, DefaultScreen(d)), WhitePixel(d, DefaultScreen(d)));
+  XSelectInput(d, w, ExposureMask | ButtonPressMask);
+  XMapWindow(d, w);
+
+  {
+    XSetWindowAttributes att;
+    att.backing_store = Always;
+    XChangeWindowAttributes(d, w, CWBackingStore, &att);
+  }
+
+  XStoreName(d, w, title);
+
+  p->bg = XCreateGC(d, w, 0, NULL);
+  XCopyGC(d, DefaultGC(d, DefaultScreen(d)), -1L, p->bg);
+  gcv.foreground = WhitePixel(d, DefaultScreen(d));
+  XChangeGC(d, p->bg, GCForeground, &gcv);
+
+  pm = XCreatePixmap(d, w, width, height, DefaultDepth(d, DefaultScreen(d)));
+
+  p->width = width;
+  p->height = height;
+  p->p = malloc(nplots * sizeof(data)); if (p->p == NULL) abort();
+
+  va_start(ap, nplots);
+  for (i = 0; i < nplots; i++) {
+    int count;
+    int type;
+    char *color;
+    XColor rcol, scol;
+
+    count = va_arg(ap, int);
+    type = va_arg(ap, int);
+    color = va_arg(ap, char *);
+
+    p->p[i].g = XCreateGC(d, w, 0, NULL);
+    XCopyGC(d, DefaultGC(d, DefaultScreen(d)), -1L, p->p[i].g);
+    if (XAllocNamedColor(d, DefaultColormap(d, DefaultScreen(d)),
+                         color, &scol, &rcol)) {
+      gcv.foreground = scol.pixel;
+      XChangeGC(d, p->p[i].g, GCForeground, &gcv);
+    } else {
+      printf("could not allocate color '%s'\n", color);
+      abort();
+    }
+
+    if (type == PLOT_VS_TIME) {
+      p->p[i].buf = malloc(sizeof(float) * count);
+      if (p->p[i].buf == NULL) abort();
+      p->p[i].iqbuf = malloc(sizeof(short) * count * 2);
+      if(p->p[i].iqbuf==NULL)abort();
+    } else if (type == PLOT_MINMAX) {
+      p->p[i].buf = malloc(sizeof(float) * count);
+      if (p->p[i].buf == NULL) abort();
+      p->p[i].iqbuf = NULL;
+    } else {
+      p->p[i].buf = NULL;
+      p->p[i].iqbuf = malloc(sizeof(short) * count * 2);
+      if(p->p[i].iqbuf==NULL)abort();
+    }
+    p->p[i].count = count;
+    p->p[i].type = type;
+    p->p[i].iq_count = 0;
+    p->p[i].iq_insert_pos = 0;
+  }
+  va_end(ap);
+
+  p->d = d;
+  p->w = w;
+  p->px = pm;
+
+  p->zoom = 1;
+  p->nplots = nplots;
+
+  pthread_mutex_init(&p->lock, NULL);
+
+  if (pipe(p->timer_pipe)) abort();
+
+  new_thread(plot_thread, p);
+  new_thread(timer_thread, p);
+
+  return p;
+}
+
+void plot_set(void *_plot, float *data, int len, int pos, int pp)
+{
+  plot *p = _plot;
+  if (pthread_mutex_lock(&p->lock)) abort();
+  memcpy(p->p[pp].buf + pos, data, len * sizeof(float));
+  if (pthread_mutex_unlock(&p->lock)) abort();
+}
+
+void iq_plot_set(void *_plot, short *data, int count, int pos, int pp)
+{
+  plot *p = _plot;
+  if (pthread_mutex_lock(&p->lock)) abort();
+  memcpy(p->p[pp].iqbuf + pos * 2, data, count * 2 * sizeof(short));
+  if (pthread_mutex_unlock(&p->lock)) abort();
+}
+
+void iq_plot_set_sized(void *_plot, short *data, int count, int pp)
+{
+  plot *p = _plot;
+  if (pthread_mutex_lock(&p->lock)) abort();
+  memcpy(p->p[pp].iqbuf, data, count * 2 * sizeof(short));
+  p->p[pp].iq_count = count;
+  if (pthread_mutex_unlock(&p->lock)) abort();
+}
+
+void iq_plot_add_iq_point_loop(void *_plot, short i, short q, int pp)
+{
+  plot *p = _plot;
+  if (pthread_mutex_lock(&p->lock)) abort();
+  p->p[pp].iqbuf[p->p[pp].iq_insert_pos*2] = i;
+  p->p[pp].iqbuf[p->p[pp].iq_insert_pos*2+1] = q;
+  if (p->p[pp].iq_count != p->p[pp].count) p->p[pp].iq_count++;
+  p->p[pp].iq_insert_pos++;
+  if (p->p[pp].iq_insert_pos == p->p[pp].count) p->p[pp].iq_insert_pos = 0;
+  if (pthread_mutex_unlock(&p->lock)) abort();
+}
+
+void iq_plot_add_energy_point_loop(void *_plot, int e, int pp)
+{
+  plot *p = _plot;
+  if (pthread_mutex_lock(&p->lock)) abort();
+  p->p[pp].buf[p->p[pp].iq_insert_pos] = e;
+  if (p->p[pp].iq_count != p->p[pp].count) p->p[pp].iq_count++;
+  p->p[pp].iq_insert_pos++;
+  if (p->p[pp].iq_insert_pos == p->p[pp].count) p->p[pp].iq_insert_pos = 0;
+  if (pthread_mutex_unlock(&p->lock)) abort();
+}

common/utils/T/tracee/Makefile

+CC=gcc
+CFLAGS=-Wall -g -pthread -DT_TRACER -I.
+
+PROG=tracee
+OBJS=tracee.o ../T.o
+
+$(PROG): $(OBJS)
+	$(CC) $(CFLAGS) -o $(PROG) $(OBJS) -lrt
+
+tracee.o: tracee.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -f *.o $(PROG) core

common/utils/T/tracee/README

+this is a very basic tracee, used to debug the tracer

common/utils/T/tracee/tracee.c

+#include "../T.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(void)
+{
+  int frame = 0;
+  T_connect_to_tracer("127.0.0.1", 2020);
+  while (1) {
+    getchar();
+    T(T_PUCCH_1AB_IQ, T_INT(0), T_INT(0), T_INT(frame), T_INT(0), T_INT(0), T_INT(0));
+    frame++;
+  }
+  return 0;
+}

common/utils/T/tracer/Makefile

+CC=gcc
+CFLAGS=-Wall -g -pthread -DT_TRACER -I.
+
+#CFLAGS += -O3 -ffast-math -fomit-frame-pointer
+
+LIBS=-lX11 -lm -lpng -lXft
+
+all: textlog enb vcd
+
+textlog: utils.o textlog.o database.o event.o handler.o config.o \
+         event_selector.o view/view.a gui/gui.a logger/logger.a \
+         filter/filter.a
+	$(CC) $(CFLAGS) -o textlog $^ $(LIBS)
+
+enb: utils.o enb.o database.o event.o handler.o config.o \
+         event_selector.o view/view.a gui/gui.a logger/logger.a \
+         filter/filter.a
+	$(CC) $(CFLAGS) -o enb $^ $(LIBS)
+
+vcd: utils.o vcd.o database.o event.o handler.o config.o \
+         event_selector.o view/view.a gui/gui.a logger/logger.a \
+         filter/filter.a
+	$(CC) $(CFLAGS) -o vcd $^ $(LIBS)
+
+.PHONY: all gui/gui.a view/view.a logger/logger.a filter/filter.a
+
+gui/gui.a:
+	cd gui && make
+
+view/view.a:
+	cd view && make
+
+logger/logger.a:
+	cd logger && make
+
+filter/filter.a:
+	cd filter && make
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -f *.o core tracer_remote textlog enb vcd
+	cd gui && make clean
+	cd view && make clean
+	cd logger && make clean
+	cd filter && make clean

common/utils/T/tracer/config.c

+#include "config.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static char *local;
+static int local_size;
+static char *remote;
+static int remote_size;
+
+static char *PUT(char *to, int tosize, char c)
+{
+  if ((tosize & 4095) == 0) {
+    to = realloc(to, tosize + 4096); if (to == NULL) abort();
+  }
+  to[tosize] = c;
+  return to;
+}
+
+void  clear_remote_config(void)
+{
+  free(remote);
+  remote = NULL;
+  remote_size = 0;
+}
+
+void append_received_config_chunk(char *buf, int length)
+{
+  int buflen = *(int *)buf;
+  if (buflen != length - sizeof(int)) {
+    printf("ERROR: bad trace -1, should not happen...\n");
+    abort();
+  }
+  buf += sizeof(int);
+  while (buflen) {
+    remote = PUT(remote, remote_size, *buf);
+    remote_size++;
+    buf++;
+    buflen--;
+  }
+}
+
+void load_config_file(char *filename)
+{
+  int c;
+  FILE *f = fopen(filename, "r");
+  if (f == NULL) { perror(filename); abort(); }
+  while (1) {
+    c = fgetc(f); if (c == EOF) break;
+    local = PUT(local, local_size, c);
+    local_size++;
+  }
+  fclose(f);
+}
+
+void verify_config(void)
+{
+  if (local_size != remote_size || memcmp(local, remote, local_size) != 0) {
+    printf("ERROR: local and remote T_messages.txt not identical\n");
+    abort();
+  }
+}

common/utils/T/tracer/config.h

+#ifndef _CONFIG_H_
+#define _CONFIG_H_
+
+void clear_remote_config(void);
+void append_received_config_chunk(char *buf, int length);
+void load_config_file(char *filename);
+void verify_config(void);
+
+#endif /* _CONFIG_H_ */

common/utils/T/tracer/database.h

+#ifndef _DATABASE_H_
+#define _DATABASE_H_
+
+/* returns an opaque pointer - truly a 'database *', see database.c */
+void *parse_database(char *filename);
+void dump_database(void *database);
+void list_ids(void *database);
+void list_groups(void *database);
+void on_off(void *d, char *item, int *a, int onoff);
+char *event_name_from_id(void *database, int id);
+int event_id_from_name(void *database, char *name);
+int number_of_ids(void *database);
+int database_get_ids(void *database, char ***ids);
+int database_get_groups(void *database, char ***groups);
+int database_pos_to_id(void *database, int pos);
+void database_get_generic_description(void *database, int id,
+    char **name, char **desc);
+
+/****************************************************************************/
+/* get format of an event                                                   */
+/****************************************************************************/
+
+typedef struct {
+  char **type;
+  char **name;
+  int count;
+} database_event_format;
+
+database_event_format get_format(void *database, int event_id);
+
+#endif /* _DATABASE_H_ */

common/utils/T/tracer/defs.h

+#ifndef _TRACER_DEFS_H_
+#define _TRACER_DEFS_H_
+
+/* types of plots */
+#define PLOT_VS_TIME   0
+#define PLOT_IQ_POINTS 1
+#define PLOT_MINMAX    2
+
+void new_thread(void *(*f)(void *), void *data);
+
+/* ... is { int count; int type; char *color; } for 'nplots' plots */
+void *make_plot(int width, int height, char *title, int nplots, ...);
+void plot_set(void *plot, float *data, int len, int pos, int pp);
+void iq_plot_set(void *plot, short *data, int len, int pos, int pp);
+void iq_plot_set_sized(void *_plot, short *data, int len, int pp);
+void iq_plot_add_iq_point_loop(void *_plot, short i, short q, int pp);
+void iq_plot_add_energy_point_loop(void *_plot, int e, int pp);
+
+/* T gui functions */
+void t_gui_start(void);
+void t_gui_set_input_signal(int eNB, int frame, int subframe, int antenna,
+    int size, void *buf);
+
+#endif /* _TRACER_DEFS_H_ */

common/utils/T/tracer/event.c

+#include "event.h"
+#include "database.h"
+#include "utils.h"
+#include "config.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+event get_event(int socket, char *event_buffer, void *database)
+{
+#ifdef T_SEND_TIME
+  struct timespec t;
+#endif
+  int type;
+  int32_t length;
+
+  /* Events type -1 and -2 are special: the tracee sends its version
+   * of T_messages.txt using those events.
+   * We have to check that the local version of T_messages.txt is identical
+   * to the one the tracee uses. We don't report those events to the
+   * application.
+   */
+
+again:
+  if (fullread(socket, &length, 4) == -1) goto read_error;
+#ifdef T_SEND_TIME
+  if (fullread(socket, &t, sizeof(struct timespec)) == -1) goto read_error;
+  length -= sizeof(struct timespec);
+#endif
+  if (fullread(socket, &type, sizeof(int)) == -1) goto read_error;
+  length -= sizeof(int);
+  if (fullread(socket, event_buffer, length) == -1) goto read_error;
+
+  if (type == -1) append_received_config_chunk(event_buffer, length);
+  if (type == -2) verify_config();
+
+  if (type == -1 || type == -2) goto again;
+
+#ifdef T_SEND_TIME
+  return new_event(t, type, length, event_buffer, database);
+#else
+  return new_event(type, length, event_buffer, database);
+#endif
+
+read_error:
+  return (event){type: -1};
+}
+
+#ifdef T_SEND_TIME
+event new_event(struct timespec sending_time, int type,
+    int length, char *buffer, void *database)
+#else
+event new_event(int type, int length, char *buffer, void *database)
+#endif
+{
+  database_event_format f;
+  event e;
+  int i;
+  int offset;
+
+#ifdef T_SEND_TIME
+  e.sending_time = sending_time;
+#endif
+  e.type = type;
+  e.buffer = buffer;
+
+  f = get_format(database, type);
+
+  e.ecount = f.count;
+
+  offset = 0;
+
+  /* setup offsets */
+  /* TODO: speedup (no strcmp, string event to include length at head) */
+  for (i = 0; i < f.count; i++) {
+    //e.e[i].offset = offset;
+    if (!strcmp(f.type[i], "int")) {
+      e.e[i].type = EVENT_INT;
+      e.e[i].i = *(int *)(&buffer[offset]);
+      offset += 4;
+    } else if (!strcmp(f.type[i], "ulong")) {
+      e.e[i].type = EVENT_ULONG;
+      e.e[i].ul = *(unsigned long *)(&buffer[offset]);
+      offset += sizeof(unsigned long);
+    } else if (!strcmp(f.type[i], "string")) {
+      e.e[i].type = EVENT_STRING;
+      e.e[i].s = &buffer[offset];
+      while (buffer[offset]) offset++;
+      offset++;
+    } else if (!strcmp(f.type[i], "buffer")) {
+      int len;
+      e.e[i].type = EVENT_BUFFER;
+      len = *(int *)(&buffer[offset]);
+      e.e[i].bsize = len;
+      e.e[i].b = &buffer[offset+sizeof(int)];
+      offset += len+sizeof(int);
+    } else {
+      printf("unhandled type '%s'\n", f.type[i]);
+      abort();
+    }
+  }
+
+  if (e.ecount==0) { printf("FORMAT not set in event %d\n", type); abort(); }
+
+  return e;
+}

common/utils/T/tracer/event.h

+#ifndef _EVENT_H_
+#define _EVENT_H_
+
+#include "../T_defs.h"
+#ifdef T_SEND_TIME
+#include <time.h>
+#endif
+
+enum event_arg_type {
+  EVENT_INT,
+  EVENT_ULONG,
+  EVENT_STRING,
+  EVENT_BUFFER
+};
+
+typedef struct {
+  enum event_arg_type type;
+  //int offset;
+  union {
+    int i;
+    unsigned long ul;
+    char *s;
+    struct {
+      int bsize;
+      void *b;
+    };
+  };
+} event_arg;
+
+typedef struct {
+#ifdef T_SEND_TIME
+  struct timespec sending_time;
+#endif
+  int type;
+  char *buffer;
+  event_arg e[T_MAX_ARGS];
+  int ecount;
+} event;
+
+event get_event(int s, char *v, void *d);
+
+#ifdef T_SEND_TIME
+event new_event(struct timespec sending_time, int type,
+    int length, char *buffer, void *database);
+#else
+event new_event(int type, int length, char *buffer, void *database);
+#endif
+
+#endif /* _EVENT_H_ */

common/utils/T/tracer/event_selector.h

+#ifndef _EVENT_SELECTOR_H_
+#define _EVENT_SELECTOR_H_
+
+#include "gui/gui.h"
+
+typedef void event_selector;
+
+event_selector *setup_event_selector(gui *g, void *database, int *is_on,
+    void (*change_callback)(void *), void *change_callback_data);
+
+#endif /* _EVENT_SELECTOR_H_ */

common/utils/T/tracer/filter/Makefile

+CC=gcc
+CFLAGS=-Wall -g -pthread -I..
+
+OBJS=filter.o
+
+filter.a: $(OBJS)
+	ar cr filter.a $(OBJS)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -o $@ -c $<
+
+clean:
+	rm -f *.a *.o

common/utils/T/tracer/filter/filter.c

+#include "filter.h"
+#include "event.h"
+#include "database.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct filter {
+  union {
+    struct { struct filter *a, *b; } op2;
+    int v;
+    struct { int event_type; int arg_index; } evarg;
+  } v;
+
+  int (*eval)(struct filter *this, event e);
+};
+
+/****************************************************************************/
+/*                     evaluation functions                                 */
+/****************************************************************************/
+
+int eval_and(struct filter *f, event e)
+{
+  if (f->v.op2.a->eval(f->v.op2.a, e) == 0) return 0;
+  return f->v.op2.b->eval(f->v.op2.b, e);
+}
+
+int eval_eq(struct filter *f, event e)
+{
+  int a = f->v.op2.a->eval(f->v.op2.a, e);
+  int b = f->v.op2.b->eval(f->v.op2.b, e);
+  return a == b;
+}
+
+int eval_int(struct filter *f, event e)
+{
+  return f->v.v;
+}
+
+int eval_evarg(struct filter *f, event e)
+{
+  if (e.type != f->v.evarg.event_type) {
+    printf("%s:%d:%s: bad event type\n", __FILE__, __LINE__, __FUNCTION__);
+    abort();
+  }
+  if (e.e[f->v.evarg.arg_index].type != EVENT_INT) {
+    printf("%s:%d:%s: bad event argtype; has to be 'int'\n",
+        __FILE__, __LINE__, __FUNCTION__);
+    abort();
+  }
+  return e.e[f->v.evarg.arg_index].i;
+}
+
+/****************************************************************************/
+/*                     filter construction functions                        */
+/****************************************************************************/
+
+filter *filter_and(filter *a, filter *b)
+{
+  struct filter *ret = calloc(1, sizeof(struct filter));
+  if (ret == NULL) abort();
+  ret->eval = eval_and;
+  ret->v.op2.a = a;
+  ret->v.op2.b = b;
+  return ret;
+}
+
+filter *filter_eq(filter *a, filter *b)
+{
+  struct filter *ret = calloc(1, sizeof(struct filter));
+  if (ret == NULL) abort();
+  ret->eval = eval_eq;
+  ret->v.op2.a = a;
+  ret->v.op2.b = b;
+  return ret;
+}
+
+filter *filter_int(int v)
+{
+  struct filter *ret = calloc(1, sizeof(struct filter));
+  if (ret == NULL) abort();
+  ret->eval = eval_int;
+  ret->v.v = v;
+  return ret;
+}
+
+filter *filter_evarg(void *database, char *event_name, char *varname)
+{
+  struct filter *ret;
+  int event_id;
+  database_event_format f;
+  int i;
+
+  ret = calloc(1, sizeof(struct filter)); if (ret == NULL) abort();
+
+  event_id = event_id_from_name(database, event_name);
+  f = get_format(database, event_id);
+
+  ret->eval = eval_evarg;
+  ret->v.evarg.event_type = event_id;
+  ret->v.evarg.arg_index = -1;
+
+  for (i = 0; i < f.count; i++) {
+    if (strcmp(f.name[i], varname) != 0) continue;
+    ret->v.evarg.arg_index = i;
+    break;
+  }
+  if (ret->v.evarg.arg_index == -1) {
+    printf("%s:%d:%s: event '%s' has no argument '%s'\n",
+        __FILE__, __LINE__, __FUNCTION__, event_name, varname);
+    abort();
+  }
+
+  return ret;
+}
+
+/****************************************************************************/
+/*                     eval function                                        */
+/****************************************************************************/
+
+int filter_eval(filter *_f, event e)
+{
+  struct filter *f = _f;
+  return f->eval(f, e);
+}

common/utils/T/tracer/filter/filter.h

+#ifndef _FILTER_H_
+#define _FILTER_H_
+
+#include "event.h"
+
+typedef void filter;
+
+filter *filter_and(filter *a, filter *b);
+filter *filter_eq(filter *a, filter *b);
+filter *filter_int(int v);
+filter *filter_evarg(void *database, char *event_name, char *varname);
+
+int filter_eval(filter *f, event e);
+
+#endif /* _FILTER_H_ */