Add WIP implementation for the exception memory model:

add header m-try that defines the M_TRY / M_CATCH macros
that macros similarly to the C++ try / catch keywords.
Add implementation for C++, GCC, CLANG and pure C compiler.

tests/test-mtry.c

@@ -0,0 +1,367 @@
+/*
+ * Copyright (c) 2017-2023, Patrick Pelissier
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * + Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * + Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include <stdio.h>
+#include "m-try.h"
+#include "test-obj.h"
+
+M_TRY_DEF_ONCE()
+
+static void test_throw(void)
+{
+  M_TRY(protect) {
+    M_THROW(67, 56);
+  } M_CATCH(protect, 67) {
+    assert(protect->n == 1);
+    M_THROW(M_ERROR_MEMORY, protect->error[0], 4, 6, 8);
+  }
+}
+
+// Test of try / catch with throw.
+// No memory allocation
+static void test1(void)
+{
+  volatile int flow = 0;
+
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+  } M_CATCH(test1, M_ERROR_MEMORY) {
+    assert(0);
+  }
+  assert(flow ++ == 2);
+
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+    M_THROW(M_ERROR_MEMORY, 0);
+    assert(0);
+  } M_CATCH(test1, M_ERROR_MEMORY) {
+    assert(flow++ == 2);
+  }
+  assert(flow ++ == 3);
+
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+    M_TRY(test2) {
+      assert(flow ++ == 2);
+      M_THROW(189, 0);
+      assert(0);
+    } M_CATCH(test2, 189) {
+      assert(flow++ == 3);
+    }
+  } M_CATCH(test1, M_ERROR_MEMORY) {
+    assert(0);
+  }
+  assert(flow ++ == 4);
+  
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+    M_TRY(test2) {
+      assert(flow ++ == 2);
+      M_TRY(test3) {
+        assert(flow ++ == 3);
+      } M_CATCH(test3, 67) {}
+      assert(flow ++ == 4);
+      M_TRY(test4) {
+        assert(flow ++ == 5);
+        M_THROW(M_ERROR_ACCESS, 12);
+        assert(0);
+      } M_CATCH(test4, 67) {}
+      assert(0);
+    } M_CATCH(test2, M_ERROR_ACCESS) {
+      assert(flow++ == 6);
+      assert(test2->n == 1);
+      assert(test2->error[0] == 12);
+    }
+  } M_CATCH(test1, M_ERROR_MEMORY) {
+    assert(0);
+  }
+  assert(flow ++ == 7);
+
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+    M_TRY(test2) {
+      assert(flow ++ == 2);
+      M_TRY(test3) {
+        assert(flow ++ == 3);
+      } M_CATCH(test3, 42) {
+        assert(0);
+      }
+      assert(flow ++ == 4);
+      M_TRY(test4) {
+        assert(flow ++ == 5);
+        M_THROW(42, 1, 3);
+        assert(0);
+      } M_CATCH(test4, 67) {}
+      assert(0);
+    } M_CATCH(test2, M_ERROR_ACCESS) {
+      assert(0);
+    }
+  } M_CATCH(test1, M_ERROR_MEMORY) {
+    assert(0);
+  }  M_CATCH(test1, 42) {
+    assert(flow++ == 6);
+    assert(test1->n == 2);
+    assert(test1->error[0] == 1);
+    assert(test1->error[1] == 3);
+  }
+  assert(flow ++ == 7);
+
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+    M_TRY(test2) {
+      assert(flow ++ == 2);
+      M_TRY(test3) {
+        assert(flow ++ == 3);
+      } M_CATCH(test3, 42) {
+        assert(0);
+      }
+      assert(flow ++ == 4);
+      M_TRY(test4) {
+        assert(flow ++ == 5);
+      } M_CATCH(test4, 67) {}
+      assert(flow ++ == 6);
+    } M_CATCH(test2, M_ERROR_ACCESS) {
+      assert(0);
+    }
+  } M_CATCH(test1, M_ERROR_MEMORY) {
+    assert(0);
+  }  M_CATCH(test1, 42) {
+    assert(0);
+  }
+  assert(flow ++ == 7);
+
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+    M_TRY(test2) {
+      assert(flow ++ == 2);
+      test_throw();
+    } M_CATCH(test2, M_ERROR_ACCESS) {
+      assert(0);
+    }
+  } M_CATCH(test1, M_ERROR_MEMORY) {
+    assert(flow ++ == 3);
+  } M_CATCH(test1, 42) {
+    assert(0);
+  }
+  assert(flow ++ == 4);
+
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+    M_TRY(test2) {
+      assert(flow ++ == 2);
+      test_throw();
+    } M_CATCH(test2, M_ERROR_MEMORY) {
+      assert(flow ++ == 3);
+      M_RETHROW();
+    }
+  } M_CATCH(test1, M_ERROR_MEMORY) {
+    assert(flow ++ == 4);
+    assert(test1->n == 4);
+    assert(test1->error[0] == 56);
+    assert(test1->error[1] == 4);
+    assert(test1->error[2] == 6);
+    assert(test1->error[3] == 8);
+  } M_CATCH(test1, 42) {
+    assert(0);
+  }
+  assert(flow ++ == 5);
+
+  flow = 0;
+  assert(flow ++ == 0);
+  M_TRY(test1) {
+    assert(flow ++ == 1);
+    M_TRY(test2) {
+      assert(flow ++ == 2);
+      M_THROW(23);
+      assert(0);
+    } M_CATCH(test2, M_ERROR_MEMORY) {
+      assert(0);
+    }
+  } M_CATCH(test1, 42) {
+    assert(0);
+  } M_CATCH(test1, 0) {
+    // Error code 0 is special and catch all errors.
+    assert(flow ++ == 3);
+#ifndef __cplusplus
+    assert(test1->error_code == 23);
+    assert(test1->n == 0);
+#endif
+  } 
+  assert(flow ++ == 4);
+
+}
+
+static void test2(void)
+{
+  M_TRY(test1) {
+    M_LET(obj, TESTOBJ_OPLIST) {
+      testobj_set_ui(obj, 15);
+    }
+  } M_CATCH(test1, 0) {
+    assert(0);
+  }
+
+  M_TRY(test1) {
+    M_LET(obj, TESTOBJ_OPLIST) {
+      testobj_set_ui(obj, 15);
+      M_THROW(1);
+      assert(0);
+    }
+  } M_CATCH(test1, 0) {
+    // Nothing to do
+  }
+  
+  M_TRY(test1) {
+    M_LET(obj, TESTOBJ_OPLIST) {
+      testobj_set_ui(obj, 15);
+      M_LET(obj2, TESTOBJ_OPLIST) {
+        testobj_set_ui(obj2, 16);
+        M_THROW(1);
+        assert(0);
+      }
+    }
+  } M_CATCH(test1, 0) {
+    // Nothing to do
+  }
+
+  M_TRY(test1) {
+    M_LET(obj, TESTOBJ_OPLIST) {
+      testobj_set_ui(obj, 15);
+      M_LET(obj2, TESTOBJ_OPLIST) {
+        testobj_set_ui(obj2, 16);
+      }
+      M_THROW(1);
+      assert(0);
+    }
+  } M_CATCH(test1, 1) {
+    // Nothing to do
+  }
+
+  M_TRY(test1) {
+    M_LET(obj, TESTOBJ_OPLIST) {
+      testobj_set_ui(obj, 15);
+      M_TRY(test2) {
+        M_LET(obj2, TESTOBJ_OPLIST) {
+          testobj_set_ui(obj2, 16);
+        }
+      } M_CATCH(test2, 67) {}
+      M_THROW(1);
+      assert(0);
+    }
+  } M_CATCH(test1, 1) {
+    // Nothing to do
+  }
+
+  M_TRY(test1) {
+    M_LET(obj, TESTOBJ_OPLIST) {
+      testobj_set_ui(obj, 15);
+      M_TRY(test2) {
+        M_LET(obj2, TESTOBJ_OPLIST) {
+          testobj_set_ui(obj2, 16);
+        }
+        M_THROW(1);
+        assert(0);
+      } M_CATCH(test2, 67) {}
+    }
+  } M_CATCH(test1, 1) {
+    // Nothing to do
+  }
+  
+  M_TRY(test1) {
+    M_LET(obj, TESTOBJ_OPLIST) {
+      testobj_set_ui(obj, 15);
+      M_TRY(test2) {
+        M_LET(obj2, TESTOBJ_OPLIST) {
+          testobj_set_ui(obj2, 16);
+          M_THROW(1);
+          assert(0);
+        }
+      } M_CATCH(test2, 1) {
+        assert(testobj_cmp_ui(obj, 15) == 0);
+        M_THROW(1);
+        assert(0);
+      }
+    }
+  } M_CATCH(test1, 1) {
+    // Nothing to do
+  }
+  
+  M_TRY(test1) {
+    M_LET(obj, TESTOBJ_OPLIST) {
+      testobj_set_ui(obj, 15);
+      M_TRY(test2) {
+        M_LET(obj2, TESTOBJ_OPLIST) {
+          testobj_set_ui(obj2, 16);
+          M_THROW(1);
+          assert(0);
+        }
+      } M_CATCH(test2, 1) {
+        // Nothing to do
+        assert(testobj_cmp_ui(obj, 15) == 0);
+      }
+    }
+  } M_CATCH(test1, 1) {
+    // Nothing to do
+    assert(0);
+  }
+
+  M_TRY(test1) {
+    M_LET( (obj, (19)), TESTOBJ_OPLIST) {
+      M_TRY(test2) {
+        M_LET( (obj2, (16)), TESTOBJ_OPLIST) {
+          M_THROW(1);
+          assert(0);
+        }
+      } M_CATCH(test2, 1) {
+        // Nothing to do
+        assert(testobj_cmp_ui(obj, 19) == 0);
+      }
+    }
+  } M_CATCH(test1, 1) {
+    // Nothing to do
+    assert(0);
+  }
+}
+
+int main(void)
+{
+  test1();
+  test2();
+  testobj_final_check();
+  exit(0);
+}