Merge pull request #17447 from tchaikov/wip-freebsd-coredump

test/coredumpctl: support freebsd

Reviewed-by: Willem Jan Withagen <wjw@digiware.nl>

src/include/coredumpctl.h

@@ -1,13 +1,24 @@
 #pragma once
 
+#include "acconfig.h"
+
 #ifdef HAVE_SYS_PRCTL_H
 #include <iostream>
 #include <sys/prctl.h>
 #include "common/errno.h"
 
-struct PrCtl {
+class PrCtl {
   int saved_state = -1;
-  int set_dumpable(int new_state) {
+  static int get_dumpable() {
+    int r = prctl(PR_GET_DUMPABLE);
+    if (r == -1) {
+      r = errno;
+      std::cerr << "warning: unable to get dumpable flag: " << cpp_strerror(r)
+                << std::endl;
+    }
+    return r;
+  }
+  static int set_dumpable(bool new_state) {
     int r = prctl(PR_SET_DUMPABLE, new_state);
     if (r) {
       r = -errno;
@@ -17,13 +28,13 @@ struct PrCtl {
     }
     return r;
   }
+public:
   PrCtl(int new_state = 0) {
-    int r = prctl(PR_GET_DUMPABLE);
+    int r = get_dumpable();
     if (r == -1) {
-      r = errno;
-      std::cerr << "warning: unable to get dumpable flag: " << cpp_strerror(r)
-                << std::endl;
-    } else if (r != new_state) {
+      return;
+    }
+    if (r != new_state) {
       if (!set_dumpable(new_state)) {
         saved_state = r;
       }
@@ -38,10 +49,57 @@ struct PrCtl {
 };
 
 #else
+#include <sys/resource.h>
+#ifdef RLIMIT_CORE
+#include <iostream>
+#include <sys/resource.h>
+#include "common/errno.h"
 
+class PrCtl {
+  rlimit saved_lim;
+  static int get_dumpable(rlimit* saved) {
+    int r = getrlimit(RLIMIT_CORE, saved);
+    if (r) {
+      r = errno;
+      std::cerr << "warning: unable to getrlimit(): " << cpp_strerror(r)
+                << std::endl;
+    }
+    return r;
+  }
+  static void set_dumpable(const rlimit& rlim) {
+    int r = setrlimit(RLIMIT_CORE, &rlim);
+    if (r) {
+      r = -errno;
+      std::cerr << "warning: unable to setrlimit(): " << cpp_strerror(r)
+                << std::endl;
+    }
+  }
+public:
+  PrCtl(int new_state = 0) {
+    int r = get_dumpable(&saved_lim);
+    if (r == -1) {
+      return;
+    }
+    rlimit new_lim;
+    if (new_state) {
+      new_lim.rlim_cur = saved_lim.rlim_max;
+    } else {
+      new_lim.rlim_cur = new_lim.rlim_max = 0;
+    }
+    if (new_lim.rlim_cur == saved_lim.rlim_cur) {
+      return;
+    }
+    set_dumpable(new_lim);
+  }
+  ~PrCtl() {
+    set_dumpable(saved_lim);
+  }
+};
+#else
 struct PrCtl {
   // to silence the Wunused-variable warning
   PrCtl() {}
 };
 
+#endif  // RLIMIT_CORE
 #endif