[LLVMbugs] [Bug 12209] New: Incorrect debug info for large parameters

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12209

             Bug #: 12209
           Summary: Incorrect debug info for large parameters
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: matthewbg at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


$ cat test.c
#include <stdio.h>
#include <string.h>
struct big_struct_t {
  int values[10];
};
void foo (struct big_struct_t list) {
 int index;
 for (index = 0; index < 10; index++)
   printf("%4d ", list.values[index]);
}

int main ()  {
 struct big_struct_t list;
 memset(&list, 0, sizeof (list));
 foo(list);
 return 0;
}
$ clang test.c -g && gdb -q -ex "b foo" -ex run -ex "p list" -ex c -ex q
./a.out
Reading symbols from ./a.out...done.
Breakpoint 1 at 0x40057c: file test.c, line 13.
Starting program: ./a.out

Breakpoint 1, foo (list=...) at test.c:13
13        for (index = 0; index < 10; index++)
$1 = {values = {-8368, 32767, 40, 0, 16843009, 16843009, -8928, 32767,
-139593382, 32767}}
Continuing.
  0    0    0    0    0    0    0    0    0    0 [Inferior 1 (process 30234)
exited normally]

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