Fix warnings for gcc 12.3 (#3286)

* Silence a few gcc out of bounds warnings

* Search upwards from executable for prelude directory instead of assuming depth

* comment wording

* Check return values of read and write

* Correct path to vulkan headers in gfx

* Correct diagnostic on missing file in slang-embed

* Do not use absolute path to libraries in test-context.cpp

---------

Co-authored-by: Yong He <yonghe@outlook.com>

5 files changed, 14 insertions, 7 deletions

diff --git a/tools/gfx/vulkan/vk-module.h b/tools/gfx/vulkan/vk-module.h
index 5e67a0a7f..97a0c8aba 100644
--- a/tools/gfx/vulkan/vk-module.h
+++ b/tools/gfx/vulkan/vk-module.h
@@ -13,7 +13,7 @@
 
 #define VK_NO_PROTOTYPES
 
-#include <vulkan/include/vulkan/vulkan.h>
+#include <vulkan/vulkan.h>
 
 // Undef xlib macros
 #ifdef Always
diff --git a/tools/render-test/slang-support.cpp b/tools/render-test/slang-support.cpp
index d9d8ddb45..82d292cee 100644
--- a/tools/render-test/slang-support.cpp
+++ b/tools/render-test/slang-support.cpp
@@ -348,7 +348,11 @@ void ShaderCompilerUtil::Output::reset()
     fseek(sourceFile, 0, SEEK_SET);
 
     outSourceText.setCount(sourceSize + 1);
-    fread(outSourceText.getBuffer(), sourceSize, 1, sourceFile);
+    if(fread(outSourceText.getBuffer(), sourceSize, 1, sourceFile) != 1)
+    {
+        fprintf(stderr, "error: failed to read from '%s'\n", inSourcePath.getBuffer());
+        return SLANG_FAIL;
+    }
     fclose(sourceFile);
     outSourceText[sourceSize] = 0;
 
diff --git a/tools/slang-embed/slang-embed.cpp b/tools/slang-embed/slang-embed.cpp
index 80ee6c237..0edc13683 100644
--- a/tools/slang-embed/slang-embed.cpp
+++ b/tools/slang-embed/slang-embed.cpp
@@ -213,7 +213,7 @@ struct App
 
         FILE* outputFile = fopen(outputPath, "w");
         ScopedFile outputFileCleanup(outputFile);
-        if( !outputPath )
+        if( !outputFile )
         {
             fprintf(stderr, "%s: error: failed to open '%s' for reading\n", appName, outputPath);
             exit(1);
diff --git a/tools/slang-generate/main.cpp b/tools/slang-generate/main.cpp
index 7d07cd613..af81385dd 100644
--- a/tools/slang-generate/main.cpp
+++ b/tools/slang-generate/main.cpp
@@ -809,7 +809,11 @@ SourceFile* parseSourceFile(const String& path)
     fseek(inputStream, 0, SEEK_SET);
 
     char* input = (char*)malloc(inputSize + 1);
-    fread(input, inputSize, 1, inputStream);
+    if(fread(input, inputSize, 1, inputStream) != 1)
+    {
+        fprintf(stderr, "unable to read input file: %s\n", path.getBuffer());
+        return nullptr;
+    }
     input[inputSize] = 0;
 
     char const* inputEnd = input + inputSize;
diff --git a/tools/slang-test/test-context.cpp b/tools/slang-test/test-context.cpp
index 39f5c92ed..b1be005cb 100644
--- a/tools/slang-test/test-context.cpp
+++ b/tools/slang-test/test-context.cpp
@@ -122,9 +122,8 @@ TestContext::InnerMainFunc TestContext::getInnerMainFunc(const String& dirPath,
     sharedLibToolBuilder.append(name);
     sharedLibToolBuilder.append("-tool");
 
-    StringBuilder builder;
-    SharedLibrary::appendPlatformFileName(sharedLibToolBuilder.getUnownedSlice(), builder);
-    String path = Path::combine(dirPath, builder);
+    StringBuilder path;
+    SharedLibrary::appendPlatformFileName(sharedLibToolBuilder.getUnownedSlice(), path);
 
     DefaultSharedLibraryLoader* loader = DefaultSharedLibraryLoader::getSingleton();