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authorPedro Alves <palves@redhat.com>2017-09-04 20:21:13 +0100
committerPedro Alves <palves@redhat.com>2017-09-04 20:21:13 +0100
commit54990598c4c74b6af113baf801064d3b1837973f (patch)
treeae03eeeaca8298edb3fc821edcc4841afbce58df /gdb/infcall.c
parent34d16ea2a144cdac8a89050d9aab723fb675cb45 (diff)
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Fix calling prototyped functions via function pointers
Calling a prototyped function via a function pointer with the right prototype doesn't work correctly, if the called function requires argument coercion... Like, e.g., with: float mult (float f1, float f2) { return f1 * f2; } (gdb) p mult (2, 3.5) $1 = 7 (gdb) p ((float (*) (float, float)) mult) (2, 3.5) $2 = 0 both calls should have returned the same, of course. The problem is that GDB misses marking the type of the function pointer target as prototyped... Without the fix, the new test fails like this: (gdb) p ((int (*) (float, float)) t_float_values2)(3.14159,float_val2) $30 = 0 (gdb) FAIL: gdb.base/callfuncs.exp: p ((int (*) (float, float)) t_float_values2)(3.14159,float_val2) gdb/ChangeLog: 2017-09-04 Pedro Alves <palves@redhat.com> * gdbtypes.c (lookup_function_type_with_arguments): Mark function types with more than one parameter as prototyped. gdb/testsuite/ChangeLog: 2017-09-04 Pedro Alves <palves@redhat.com> * gdb.base/callfuncs.exp (do_function_calls): New parameter "prototypes". Test calling float functions via prototyped and unprototyped function pointers. (perform_all_tests): New parameter "prototypes". Pass it down. (top level): Pass down "prototypes" parameter to perform_all_tests.
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