Changeset 813dfd86 for driver

Timestamp:

Dec 6, 2021, 5:06:04 PM (3 years ago)

Author:

Peter A. Buhr <pabuhr@…>

Branches:

ADT, ast-experimental, enum, forall-pointer-decay, master, pthread-emulation, qualifiedEnum

Children:

295dd61

Parents:

c60e5094

Message:

print better information when asm check fails to find debug C code

File:

• driver/as.cc (modified) (3 diffs)

driver/as.cc

@@ -11 +11 @@
 // Created On       : Wed Aug  1 10:49:42 2018
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Sat Sep  8 08:40:16 2018
-// Update Count     : 97
+// Last Modified On : Mon Dec  6 16:57:45 2021
+// Update Count     : 104
 //
 
@@ -48 +48 @@
                 if ( start == (void *)-1 ) { perror( "mmap" ); exit( EXIT_FAILURE ); };
 
-                if ( char * cursor = strstr( start, ".Ldebug_info0:" ) ) { // debug information ?
+                if ( char * dcursor = strstr( start, ".Ldebug_info0:" ) ) { // debug information ?
                         // Expand file by one byte to hold 2 character Cforall language code.
                         if ( ftruncate( fd, size + 1 ) ) { perror( "ftruncate" ); exit( EXIT_FAILURE ); };
 
+                        char * cursor = dcursor;
                         for ( int i = 0; i < 8; i += 1 ) {                      // move N (magic) lines forward
                                 cursor = strstr( cursor, "\n" ) + 1;
@@ -57 +58 @@
 
                         cursor -= 2;                                                            // backup over "c\n" language value
-                        if ( *(cursor - 1) != 'x' ) { fprintf( stderr, "invalid C language code\n" ); exit( EXIT_FAILURE ); };
+                        if ( *(cursor - 1) != 'x' ) {                           // 0x before code
+                                fprintf( stderr, "*** ERROR *** Invalid C language code found in assembler file: %s\n"
+                                                 "Assembler debug information:\n%.*s",
+                                                 argv[argc - 1], (int)(cursor - dcursor) + 2, dcursor );
+                                exit( EXIT_FAILURE );
+                        };
 
                         memmove( cursor + 2, cursor + 1, start + size - cursor - 1 ); // move remaining text 1 character right