143 lines
4.6 KiB
Diff
143 lines
4.6 KiB
Diff
http://sourceware.org/ml/gdb-patches/2016-02/msg00842.html
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Subject: [PATCH v2 4/6] fortran: enable parsing of stride parameter for subranges
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From: Christoph Weinmann <christoph.t.weinmann@intel.com>
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Allow the user to provide a stride parameter for Fortran
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subarrays. The stride parameter can be any integer except
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'0'. The default stride value is '1'.
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2013-11-27 Christoph Weinmann <christoph.t.weinmann@intel.com>
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* eval.c (value_f90_subarray): Add expression evaluation
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for a stride parameter in a Fortran range expression.
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* f-exp.y: Add yacc rules for writing info on the elt stack
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when the user provided a stride argument.
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* f-lang.h (F90_RANGE): Add field to enum to show when a
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stride was provided by the user.
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* parse.c (operator_length_standard): Check if a stride
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value was provided, and increment argument counter
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accordingly.
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Signed-off-by: Christoph Weinmann <christoph.t.weinmann@intel.com>
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---
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gdb/eval.c | 10 +++++++++-
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gdb/f-exp.y | 33 +++++++++++++++++++++++++++++++--
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gdb/f-lang.h | 5 +++--
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gdb/parse.c | 3 +++
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4 files changed, 46 insertions(+), 5 deletions(-)
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diff --git a/gdb/eval.c b/gdb/eval.c
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index 9b8b051..308ada3 100644
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--- a/gdb/eval.c
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+++ b/gdb/eval.c
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@@ -438,7 +438,7 @@ value_f90_subarray (struct value *array, struct expression *exp,
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struct subscript_range
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{
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enum f90_range_type f90_range_type;
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- LONGEST low, high;
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+ LONGEST low, high, stride;
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}
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range;
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LONGEST number;
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@@ -488,6 +488,14 @@ value_f90_subarray (struct value *array, struct expression *exp,
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== SUBARRAY_HIGH_BOUND)
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range->high = value_as_long (evaluate_subexp (NULL_TYPE, exp,
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pos, noside));
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+
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+ /* Assign the user's stride value if provided. */
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+ if ((range->f90_range_type & SUBARRAY_STRIDE) == SUBARRAY_STRIDE)
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+ range->stride = value_as_long (evaluate_subexp (NULL_TYPE, exp,
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+ pos, noside));
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+ /* Assign the default stride value '1'. */
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+ else
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+ range->stride = 1;
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}
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/* User input is an index. E.g.: "p arry(5)". */
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else
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diff --git a/gdb/f-exp.y b/gdb/f-exp.y
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index b1206de..5151fee 100644
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--- a/gdb/f-exp.y
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+++ b/gdb/f-exp.y
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@@ -316,8 +316,8 @@ arglist : arglist ',' exp %prec ABOVE_COMMA
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subrange: exp ':' exp %prec ABOVE_COMMA
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{ write_exp_elt_opcode (pstate, OP_F90_RANGE);
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- write_exp_elt_longcst (pstate,
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- SUBARRAY_LOW_BOUND | SUBARRAY_HIGH_BOUND);
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+ write_exp_elt_longcst (pstate, SUBARRAY_LOW_BOUND
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+ | SUBARRAY_HIGH_BOUND);
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write_exp_elt_opcode (pstate, OP_F90_RANGE); }
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;
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@@ -339,6 +339,35 @@ subrange: ':' %prec ABOVE_COMMA
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write_exp_elt_opcode (pstate, OP_F90_RANGE); }
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;
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+/* Each subrange type can have a stride argument. */
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+subrange: exp ':' exp ':' exp %prec ABOVE_COMMA
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+ { write_exp_elt_opcode (pstate, OP_F90_RANGE);
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+ write_exp_elt_longcst (pstate, SUBARRAY_LOW_BOUND
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+ | SUBARRAY_HIGH_BOUND
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+ | SUBARRAY_STRIDE);
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+ write_exp_elt_opcode (pstate, OP_F90_RANGE); }
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+ ;
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+
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+subrange: exp ':' ':' exp %prec ABOVE_COMMA
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+ { write_exp_elt_opcode (pstate, OP_F90_RANGE);
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+ write_exp_elt_longcst (pstate, SUBARRAY_LOW_BOUND
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+ | SUBARRAY_STRIDE);
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+ write_exp_elt_opcode (pstate, OP_F90_RANGE); }
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+ ;
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+
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+subrange: ':' exp ':' exp %prec ABOVE_COMMA
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+ { write_exp_elt_opcode (pstate, OP_F90_RANGE);
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+ write_exp_elt_longcst (pstate, SUBARRAY_HIGH_BOUND
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+ | SUBARRAY_STRIDE);
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+ write_exp_elt_opcode (pstate, OP_F90_RANGE); }
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+ ;
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+
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+subrange: ':' ':' exp %prec ABOVE_COMMA
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+ { write_exp_elt_opcode (pstate, OP_F90_RANGE);
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+ write_exp_elt_longcst (pstate, SUBARRAY_STRIDE);
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+ write_exp_elt_opcode (pstate, OP_F90_RANGE); }
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+ ;
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+
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complexnum: exp ',' exp
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{ }
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;
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diff --git a/gdb/f-lang.h b/gdb/f-lang.h
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index 4d56bf7..0ad57af 100644
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--- a/gdb/f-lang.h
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+++ b/gdb/f-lang.h
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@@ -44,8 +44,9 @@ extern void f_val_print (struct type *, const gdb_byte *, int, CORE_ADDR,
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enum f90_range_type
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{
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- SUBARRAY_LOW_BOUND = 0x1, /* "(low:)" */
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- SUBARRAY_HIGH_BOUND = 0x2 /* "(:high)" */
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+ SUBARRAY_LOW_BOUND = 0x1, /* "(low:)" or "(low::)" */
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+ SUBARRAY_HIGH_BOUND = 0x2, /* "(:high)" or "(:high:)" */
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+ SUBARRAY_STRIDE = 0x4 /* "(::stride)" */
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};
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/* A common block. */
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diff --git a/gdb/parse.c b/gdb/parse.c
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index d500279..07248c3 100644
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--- a/gdb/parse.c
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+++ b/gdb/parse.c
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@@ -1018,6 +1018,9 @@ operator_length_standard (const struct expression *expr, int endpos,
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if ((range_type & SUBARRAY_HIGH_BOUND) == SUBARRAY_HIGH_BOUND)
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args++;
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+ if ((range_type & SUBARRAY_STRIDE) == SUBARRAY_STRIDE)
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+ args++;
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+
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break;
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default:
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--
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2.5.0
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