X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs%2F.git;a=blobdiff_plain;f=direct%2Fdtest.c;h=6f32cb53d81ac028a86c20f00f08ae4df32de1db;hp=de1eaa2d66fb7776ca60bcf2e1220b6c799b0a38;hb=f312fc5a4e1e46509129caf3d7fd2edafc743d15;hpb=2724e648ea75872c7638f52420679b2d3682ebb4

diff --git a/direct/dtest.c b/direct/dtest.c
index de1eaa2..6f32cb5 100644
--- a/direct/dtest.c
+++ b/direct/dtest.c
@@ -32,6 +32,30 @@ void copy_in_a_file(char *yaffsName,char *inName)
 	close(inh);
 }
 
+void make_a_file(char *yaffsName,char bval,int sizeOfFile)
+{
+	int outh;
+	int i;
+	unsigned char buffer[100];
+
+	outh = yaffs_open(yaffsName, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
+	
+	memset(buffer,bval,100);
+	
+	do{
+		i = sizeOfFile;
+		if(i > 100) i = 100;
+		sizeOfFile -= i;
+		
+		yaffs_write(outh,buffer,i);
+		
+	} while (sizeOfFile > 0);
+	
+		
+	yaffs_close(outh);
+
+}
+
 
 
 
@@ -555,10 +579,94 @@ int directory_rename_test(void)
 	
 }
 
+int cache_read_test(void)
+{
+	int a,b,c;
+	int i;
+	int sizeOfFiles = 500000;
+	char buffer[100];
+	
+	yaffs_StartUp();
+	
+	yaffs_mount("/boot");
+	
+	make_a_file("/boot/a",'a',sizeOfFiles);
+	make_a_file("/boot/b",'b',sizeOfFiles);
+
+	a = yaffs_open("/boot/a",O_RDONLY,0);
+	b = yaffs_open("/boot/b",O_RDONLY,0);
+	c = yaffs_open("/boot/c", O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
+
+	do{
+		i = sizeOfFiles;
+		if (i > 100) i = 100;
+		sizeOfFiles  -= i;
+		yaffs_read(a,buffer,i);
+		yaffs_read(b,buffer,i);
+		yaffs_write(c,buffer,i);
+	} while(sizeOfFiles > 0);
+	
+	
+	
+	return 1;
+	
+}
+
+int cache_bypass_bug_test(void)
+{
+	// This test reporoduces a bug whereby YAFFS caching is buypassed
+	// resulting in erroneous reads after writes.
+	int a;
+	int i;
+	char buffer1[1000];
+	char buffer2[1000];
+	
+	memset(buffer1,0,sizeof(buffer1));
+	memset(buffer2,0,sizeof(buffer2));
+		
+	yaffs_StartUp();
+	
+	yaffs_mount("/boot");
+	
+	// Create a file of 2000 bytes.
+	make_a_file("/boot/a",'X',2000);
+
+	a = yaffs_open("/boot/a",O_RDWR, S_IREAD | S_IWRITE);
+	
+	// Write a short sequence to the file.
+	// This will go into the cache.
+	yaffs_lseek(a,0,SEEK_SET);
+	yaffs_write(a,"abcdefghijklmnopqrstuvwxyz",20); 
+
+	// Read a short sequence from the file.
+	// This will come from the cache.
+	yaffs_lseek(a,0,SEEK_SET);
+	yaffs_read(a,buffer1,30); 
+
+	// Read a page size sequence from the file.
+	yaffs_lseek(a,0,SEEK_SET);
+	yaffs_read(a,buffer2,512); 
+	
+	printf("buffer 1 %s\n",buffer1);
+	printf("buffer 2 %s\n",buffer2);
+	
+	if(strncmp(buffer1,buffer2,20))
+	{
+		printf("Cache bypass bug detected!!!!!\n");
+	}
+	
+	
+	return 1;
+}
+
+
+
 int main(int argc, char *argv[])
 {
 	//return long_test(argc,argv);
 	
-	return directory_rename_test();
+	//return cache_read_test();
+	
+	return cache_bypass_bug_test();
 	
 }