tools/llvm-c-test/diagnostic.c

   1 //===-- diagnostic.cpp - tool for testing libLLVM and llvm-c API ----------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file implements the --test-diagnostic-handler command in llvm-c-test.
  10 //
  11 // This command uses the C API to read a module with a custom diagnostic
  12 // handler set to test the diagnostic handler functionality.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "llvm-c-test.h"
  17 #include "llvm-c/BitReader.h"
  18 #include "llvm-c/Core.h"
  19
  20 #include <stdio.h>
  21
  22 static void diagnosticHandler(LLVMDiagnosticInfoRef DI, void *C) {
  23   fprintf(stderr, "Executing diagnostic handler\n");
  24
  25   fprintf(stderr, "Diagnostic severity is of type ");
  26   switch (LLVMGetDiagInfoSeverity(DI)) {
  27   case LLVMDSError:
  28     fprintf(stderr, "error");
  29     break;
  30   case LLVMDSWarning:
  31     fprintf(stderr, "warning");
  32     break;
  33   case LLVMDSRemark:
  34     fprintf(stderr, "remark");
  35     break;
  36   case LLVMDSNote:
  37     fprintf(stderr, "note");
  38     break;
  39   }
  40   fprintf(stderr, "\n");
  41
  42   (*(int *)C) = 1;
  43 }
  44
  45 static int handlerCalled = 0;
  46
  47 int llvm_test_diagnostic_handler(void) {
  48   LLVMContextRef C = LLVMGetGlobalContext();
  49   LLVMContextSetDiagnosticHandler(C, diagnosticHandler, &handlerCalled);
  50
  51   if (LLVMContextGetDiagnosticHandler(C) != diagnosticHandler) {
  52     fprintf(stderr, "LLVMContext{Set,Get}DiagnosticHandler failed\n");
  53     return 1;
  54   }
  55
  56   int *DC = (int *)LLVMContextGetDiagnosticContext(C);
  57   if (DC != &handlerCalled || *DC) {
  58     fprintf(stderr, "LLVMContextGetDiagnosticContext failed\n");
  59     return 1;
  60   }
  61
  62   LLVMMemoryBufferRef MB;
  63   char *msg = NULL;
  64   if (LLVMCreateMemoryBufferWithSTDIN(&MB, &msg)) {
  65     fprintf(stderr, "Error reading file: %s\n", msg);
  66     LLVMDisposeMessage(msg);
  67     return 1;
  68   }
  69
  70
  71   LLVMModuleRef M;
  72   int Ret = LLVMGetBitcodeModule2(MB, &M);
  73   if (Ret) {
  74     // We do not return if the bitcode was invalid, as we want to test whether
  75     // the diagnostic handler was executed.
  76     fprintf(stderr, "Error parsing bitcode: %s\n", msg);
  77   }
  78
  79   LLVMDisposeMemoryBuffer(MB);
  80
  81   if (handlerCalled) {
  82     fprintf(stderr, "Diagnostic handler was called while loading module\n");
  83   } else {
  84     fprintf(stderr, "Diagnostic handler was not called while loading module\n");
  85   }
  86
  87   return 0;
  88 }