summaryrefslogtreecommitdiffstats
path: root/pkgs/development/compilers/arachne-pnr
stat options
Period:
Authors:

Commits per author per week (path 'pkgs/development/compilers/arachne-pnr')

AuthorW26 2024W27 2024W28 2024W29 2024Total
Total00000
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 17:57:39 +0000
115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 
/*
htop - TraceScreen.c
(C) 2005-2006 Hisham H. Muhammad
Released under the GNU GPLv2, see the COPYING file
in the source distribution for its full text.
*/

#include "config.h" // IWYU pragma: keep

#include "TraceScreen.h"

#include <assert.h>
#include <fcntl.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/wait.h>

#include "CRT.h"
#include "FunctionBar.h"
#include "IncSet.h"
#include "Panel.h"
#include "ProvideCurses.h"
#include "XUtils.h"


static const char* const TraceScreenFunctions[] = {"Search ", "Filter ", "AutoScroll ", "Stop Tracing   ", "Done   ", NULL};

static const char* const TraceScreenKeys[] = {"F3", "F4", "F8", "F9", "Esc"};

static const int TraceScreenEvents[] = {KEY_F(3), KEY_F(4), KEY_F(8), KEY_F(9), 27};

TraceScreen* TraceScreen_new(const Process* process) {
   // This initializes all TraceScreen variables to "false" so only default = true ones need to be set below
   TraceScreen* this = xCalloc(1, sizeof(TraceScreen));
   Object_setClass(this, Class(TraceScreen));
   this->tracing = true;
   FunctionBar* fuBar = FunctionBar_new(TraceScreenFunctions, TraceScreenKeys, TraceScreenEvents);
   CRT_disableDelay();
   return (TraceScreen*) InfoScreen_init(&this->super, process, fuBar, LINES - 2, " ");
}

void TraceScreen_delete(Object* cast) {
   TraceScreen* this = (TraceScreen*) cast;
   if (this->child > 0) {
      kill(this->child, SIGTERM);
      waitpid(this->child, NULL, 0);
   }

   if (this->strace) {
      fclose(this->strace);
   }

   CRT_enableDelay();
   free(InfoScreen_done((InfoScreen*)this));
}

static void TraceScreen_draw(InfoScreen* this) {
   InfoScreen_drawTitled(this, "Trace of process %d - %s", this->process->pid, Process_getCommand(this->process));
}

bool TraceScreen_forkTracer(TraceScreen* this) {
   int fdpair[2] = {0, 0};

   if (pipe(fdpair) == -1)
      return false;

   if (fcntl(fdpair[0], F_SETFL, O_NONBLOCK) < 0)
      goto err;

   if (fcntl(fdpair[1], F_SETFL, O_NONBLOCK) < 0)
      goto err;

   pid_t child = fork();
   if (child == -1)
      goto err;

   if (child == 0) {
      close(fdpair[0]);

      dup2(fdpair[1], STDOUT_FILENO);
      dup2(fdpair[1], STDERR_FILENO);
      close(fdpair[1]);

      char buffer[32] = {0};
      xSnprintf(buffer, sizeof(buffer), "%d", this->super.process->pid);
      execlp("strace", "strace", "-T", "-tt", "-s", "512", "-p", buffer, NULL);

      // Should never reach here, unless execlp fails ...
      const char* message = "Could not execute 'strace'. Please make sure it is available in your $PATH.";
      ssize_t written = write(STDERR_FILENO, message, strlen(message));
      (void) written;

      exit(127);
   }

   FILE* fd = fdopen(fdpair[0], "r");
   if (!fd)
      goto err;

   close(fdpair[1]);

   this->child = child;
   this->strace = fd;
   return true;

err:
   close(fdpair[1]);
   close(fdpair[0]);
   return false;
}

static void TraceScreen_updateTrace(InfoScreen* super) {
   TraceScreen* this = (TraceScreen*) super;
   char buffer[1025];

   int fd_strace = fileno(this->strace);
   assert(fd_strace != -1);

   fd_set fds;
   FD_ZERO(&fds);
// FD_SET(STDIN_FILENO, &fds);
   FD_SET(fd_strace, &fds);

   struct timeval tv = { .tv_sec = 0, .tv_usec = 500 };
   int ready = select(fd_strace + 1, &fds, NULL, NULL, &tv);

   size_t nread = 0;
   if (ready > 0 && FD_ISSET(fd_strace, &fds))
      nread = fread(buffer, 1, sizeof(buffer) - 1, this->strace);

   if (nread && this->tracing) {
      const char* line = buffer;
      buffer[nread] = '\0';
      for (size_t i = 0; i < nread; i++) {
         if (buffer[i] == '\n') {
            buffer[i] = '\0';
            if (this->contLine) {
               InfoScreen_appendLine(&this->super, line);
               this->contLine = false;
            } else {
               InfoScreen_addLine(&this->super, line);
            }
            line = buffer + i + 1;
         }
      }
      if (line < buffer + nread) {
         InfoScreen_addLine(&this->super, line);
         buffer[nread] = '\0';
         this->contLine = true;
      }
      if (this->follow) {
         Panel_setSelected(this->super.display, Panel_size(this->super.display) - 1);
      }
   }
}

static bool TraceScreen_onKey(InfoScreen* super, int ch) {
   TraceScreen* this = (TraceScreen*) super;
   switch(ch) {
      case 'f':
      case KEY_F(8):
         this->follow = !(this->follow);
         if (this->follow)
            Panel_setSelected(super->display, Panel_size(super->display)-1);
         return true;
      case 't':
      case KEY_F(9):
         this->tracing = !this->tracing;
         FunctionBar_setLabel(super->display->defaultBar, KEY_F(9), this->tracing?"Stop Tracing   ":"Resume Tracing ");
         InfoScreen_draw(this);
         return true;
   }
   this->follow = false;
   return false;
}

const InfoScreenClass TraceScreen_class = {
   .super = {
      .extends = Class(Object),
      .delete = TraceScreen_delete
   },
   .draw = TraceScreen_draw,
   .onErr = TraceScreen_updateTrace,
   .onKey = TraceScreen_onKey,
};