c3-lang/libffi/testsuite/libffi.call/struct10.c

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• Hash : 45da2fcb
  Author :
  Date : 2018-02-17T18:53:02
  

  new test: return small struct The bug originally was discovered in https://bugs.gentoo.org/634190 where complicated callback was returning invalid data on ia64. This change adds minimal reproducer that fails only on ia64 as: FAIL: libffi.call/struct10.c -W -Wall -Wno-psabi -O0 execution test FAIL: libffi.call/struct10.c -W -Wall -Wno-psabi -O2 execution test FAIL: libffi.call/struct10.c -W -Wall -Wno-psabi -O3 execution test FAIL: libffi.call/struct10.c -W -Wall -Wno-psabi -Os execution test Test passes on amd64. The fix is in the following commit. Bug: https://bugs.gentoo.org/634190 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

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• testsuite/libffi.call/struct10.c

• /* Area:	ffi_call
     Purpose:	Check structures.
     Limitations:	none.
     PR:		none.
     Originator:	Sergei Trofimovich <slyfox@gentoo.org>
  
     The test originally discovered in ruby's bindings
     for ffi in https://bugs.gentoo.org/634190  */
  
  /* { dg-do run } */
  #include "ffitest.h"
  
  struct s {
    int s32;
    float f32;
    signed char s8;
  };
  
  struct s make_s(void) {
    struct s r;
    r.s32 = 0x1234;
    r.f32 = 7.0;
    r.s8  = 0x78;
    return r;
  }
  
  int main() {
    ffi_cif cif;
    struct s r;
    ffi_type rtype;
    ffi_type* s_fields[] = {
      &ffi_type_sint,
      &ffi_type_float,
      &ffi_type_schar,
      NULL,
    };
  
    rtype.size      = 0;
    rtype.alignment = 0,
    rtype.type      = FFI_TYPE_STRUCT,
    rtype.elements  = s_fields,
  
    r.s32 = 0xbad;
    r.f32 = 999.999;
    r.s8  = 0x51;
  
    // Here we emulate the following call:
    //r = make_s();
  
    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 0, &rtype, NULL) == FFI_OK);
    ffi_call(&cif, FFI_FN(make_s), &r, NULL);
  
    CHECK(r.s32 == 0x1234);
    CHECK(r.f32 == 7.0);
    CHECK(r.s8  == 0x78);
    exit(0);
  }
  

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