4d804846db
This makes sure that the types of the arguments are taken into account
when performing an inferior function call to a non-C (or C-like)
function. In particular, this makes sure that the arguments are
appropriatly converted to the correct type.
For instance, on x86_64-linux, with the following Ada code:
procedure Set_Float (F : Float) is
begin
Global_Float := F;
end Set_Float;
The following sequence shows that Float arguments are incorrectly
passed (Ada's Float type is the equivalent of type "float" in C):
(gdb) call set_float (2.0)
(gdb) print global_float
$1 = 0.0
Putting a breakpoint inside set_float to inspect the value of
register xmm0 gives the first hint of the problem:
(gdb) p $xmm0
$2 = (v4_float => (0 => 0.0, 2.0, 0.0, 0.0),
v2_double => (0 => 2.0, 0.0),
[...]
It shows that the argument was passed as a double.
The code responsible for doing appropriate type conversions
for the arguments (value_arg_coerce) found that our function
was not prototyped, and thus could not use typing information
for the arguments. Instead, it defaulted to the value of "set
coerce-float-to-double", which by default is true, to determine
the argument type.
This patch fixes the problem by setting the PROTOTYPE flag
for all functions of any language except C and Objective C.
gdb/ChangeLog:
* dwarf2read.c (prototyped_function_p): New function.
(read_subroutine_type): Use it.
gdb/testsuite/ChangeLog:
* gdb.ada/float_param: New testcase.
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| .. | ||
| boards | ||
| config | ||
| gdb.ada | ||
| gdb.arch | ||
| gdb.asm | ||
| gdb.base | ||
| gdb.btrace | ||
| gdb.cell | ||
| gdb.cp | ||
| gdb.disasm | ||
| gdb.dwarf2 | ||
| gdb.fortran | ||
| gdb.gdb | ||
| gdb.go | ||
| gdb.hp | ||
| gdb.java | ||
| gdb.linespec | ||
| gdb.mi | ||
| gdb.modula2 | ||
| gdb.multi | ||
| gdb.objc | ||
| gdb.opencl | ||
| gdb.opt | ||
| gdb.pascal | ||
| gdb.python | ||
| gdb.reverse | ||
| gdb.server | ||
| gdb.stabs | ||
| gdb.threads | ||
| gdb.trace | ||
| gdb.xml | ||
| lib | ||
| aclocal.m4 | ||
| ChangeLog | ||
| configure | ||
| configure.ac | ||
| dg-extract-results.sh | ||
| Makefile.in | ||
| TODO | ||