Add a test case for the jit-reader interface

Originally intended to be committed on 2013-01-17 in
675921c059dbaddd02ab2eb8a1eaf77b3ac727dd (Test case for the
jit-reader), but by mistake the files were not added.  Fortunately
they still work.

gdb/testsuite/ChangeLog:
2016-06-17  Sanjoy Das  <sanjoy@playingwithpointers.com>

	* gdb.base/jit-reader.exp: New file.
	* gdb.base/jithost.c: New file.
	* gdb.base/jithost.h: New file.
	* gdb.base/jitreader.c : New file.
	* gdb.base/jit-protocol.h: New file.
This commit is contained in:
Sanjoy Das 2016-06-17 19:24:08 +01:00 committed by Pedro Alves
parent 80c135e554
commit 2838cc1d36
7 changed files with 385 additions and 9 deletions

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@ -1,3 +1,11 @@
2016-06-17 Sanjoy Das <sanjoy@playingwithpointers.com>
* gdb.base/jit-reader.exp: New file.
* gdb.base/jithost.c: New file.
* gdb.base/jithost.h: New file.
* gdb.base/jitreader.c : New file.
* gdb.base/jit-protocol.h: New file.
2016-06-17 Yao Qi <yao.qi@linaro.org>
* gdb.base/step-over-syscall.exp (break_cond_on_syscall): New

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@ -3256,15 +3256,6 @@
* dg-extract-results.sh: Redirect grep output to /dev/null instead
of grep -q.
2012-01-17 Sanjoy Das <sanjoy@playingwithpointers.com>
* gdb.base/jit-reader.exp: New file. Test case for the jit-reader
interface.
* gdb.base/jithost.c: New file.
* gdb.base/jithost.h: New file.
* gdb.base/jitreader.c : New file.
* gdb.base/jit-protocol.h: New file.
2013-01-16 Tom Tromey <tromey@redhat.com>
* gdb.base/catch-signal.c: New file.

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/* Copyright (C) 2009-2017 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifdef JIT_H
#error "We don't include jit.h directly since we'd like the jit-reader unit \
tests to break if we make ABI incompatible changes to the structures \
re-declared here."
#endif
#ifndef JIT_PROTOCOL_H
#define JIT_PROTOCOL_H
#include <stdint.h>
typedef enum
{
JIT_NOACTION = 0,
JIT_REGISTER,
JIT_UNREGISTER
} jit_actions_t;
struct jit_code_entry
{
struct jit_code_entry *next_entry;
struct jit_code_entry *prev_entry;
void *symfile_addr;
uint64_t symfile_size;
};
struct jit_descriptor
{
uint32_t version;
uint32_t action_flag;
struct jit_code_entry *relevant_entry;
struct jit_code_entry *first_entry;
};
#endif /* JIT_PROTOCOL_H */

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# Copyright 2012-2016 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
standard_testfile jithost.c
if { (![istarget x86_64-*-*] && ![istarget i?86-*-*]) || ![is_lp64_target] } {
return -1;
}
if {[skip_shlib_tests]} {
return -1
}
if { ![isnative] } {
return -1
}
if {[get_compiler_info]} {
untested "could not get compiler info"
return 1
}
set jit_host_src $srcfile
set jit_host_bin $binfile
# We inject the complete path to jit-reader.h into the source file
# lest we end up (incorrectly) building against a system-installed
# version.
set jit_reader_header [standard_output_file "../../../../../gdb/jit-reader.h"]
set jit_reader_flag "-DJIT_READER_H=\"$jit_reader_header\""
if { [gdb_compile "${srcdir}/${subdir}/${jit_host_src}" "${jit_host_bin}" \
executable [list debug additional_flags=$jit_reader_flag]] != "" } {
untested jit-reader.exp
return -1
}
set jit_reader jitreader
set jit_reader_src ${jit_reader}.c
set jit_reader_bin [standard_output_file ${jit_reader}.so]
if { [gdb_compile_shlib "${srcdir}/${subdir}/${jit_reader_src}" "${jit_reader_bin}" \
[list debug additional_flags=$jit_reader_flag]] != "" } {
untested jit-reader.exp
return -1
}
proc jit_reader_test {} {
global jit_host_bin
global jit_reader_bin
global verbose
clean_restart $jit_host_bin
gdb_load_shlib $jit_reader_bin
if {$verbose > 0} {
gdb_test_no_output "set debug jit 1"
}
gdb_test_no_output "jit-reader-load ${jit_reader_bin}" "jit-reader-load"
gdb_run_cmd
gdb_test "" "Program received signal SIGTRAP, .*" "expect SIGTRAP"
gdb_test "bt" "jit_function_00.*"
}
jit_reader_test

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/* Copyright (C) 2009-2016 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include JIT_READER_H /* Please see jit-reader.exp for an explanation. */
#include "jithost.h"
#include "jit-protocol.h"
void __attribute__((noinline)) __jit_debug_register_code () { }
struct jit_descriptor __jit_debug_descriptor = { 1, 0, 0, 0 };
struct jit_code_entry only_entry;
typedef void (jit_function_t) ();
int main (int argc, char **argv)
{
char *code = mmap (NULL, getpagesize (), PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
jit_function_t *function = (jit_function_t *) code;
code[0] = 0xcc; /* SIGTRAP */
code[1] = 0xc3; /* RET */
struct jithost_abi *symfile = malloc (sizeof (struct jithost_abi));
symfile->begin = code;
symfile->end = code + 2;
only_entry.symfile_addr = symfile;
only_entry.symfile_size = sizeof (struct jithost_abi);
__jit_debug_descriptor.first_entry = &only_entry;
__jit_debug_descriptor.relevant_entry = &only_entry;
__jit_debug_descriptor.action_flag = JIT_REGISTER;
__jit_debug_descriptor.version = 1;
__jit_debug_register_code ();
function ();
return 0;
}

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/* Copyright (C) 2009-2016 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef JITHOST_H
#define JITHOST_H
struct jithost_abi
{
const char *begin;
const char *end;
};
#endif /* JITHOST_H */

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/* Copyright (C) 2009-2016 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include JIT_READER_H /* Please see jit-reader.exp for an explanation. */
#include "jithost.h"
GDB_DECLARE_GPL_COMPATIBLE_READER;
enum register_mapping
{
AMD64_RA = 16,
AMD64_RSP = 7,
};
struct reader_state
{
uintptr_t code_begin;
uintptr_t code_end;
};
static enum gdb_status
read_debug_info (struct gdb_reader_funcs *self,
struct gdb_symbol_callbacks *cbs,
void *memory, long memory_sz)
{
struct jithost_abi *symfile = memory;
struct gdb_object *object = cbs->object_open (cbs);
struct gdb_symtab *symtab = cbs->symtab_open (cbs, object, "");
GDB_CORE_ADDR begin = (GDB_CORE_ADDR) symfile->begin;
GDB_CORE_ADDR end = (GDB_CORE_ADDR) symfile->end;
cbs->block_open (cbs, symtab, NULL, begin, end, "jit_function_00");
cbs->symtab_close (cbs, symtab);
cbs->object_close (cbs, object);
return GDB_SUCCESS;
}
static void
free_reg_value (struct gdb_reg_value *value)
{
free (value);
}
static void
write_register (struct gdb_unwind_callbacks *callbacks, int dw_reg,
uintptr_t value)
{
const int size = sizeof (uintptr_t);
struct gdb_reg_value *reg_val =
malloc (sizeof (struct gdb_reg_value) + size - 1);
reg_val->defined = 1;
reg_val->free = free_reg_value;
memcpy (reg_val->value, &value, size);
callbacks->reg_set (callbacks, dw_reg, reg_val);
}
static int
read_register (struct gdb_unwind_callbacks *callbacks, int dw_reg,
uintptr_t *value)
{
const int size = sizeof (uintptr_t);
struct gdb_reg_value *reg_val = callbacks->reg_get (callbacks, dw_reg);
if (reg_val->size != size || !reg_val->defined)
{
reg_val->free (reg_val);
return 0;
}
memcpy (value, reg_val->value, size);
reg_val->free (reg_val);
return 1;
}
static enum gdb_status
unwind_frame (struct gdb_reader_funcs *self, struct gdb_unwind_callbacks *cbs)
{
const int word_size = sizeof (uintptr_t);
uintptr_t this_sp, this_ip, prev_ip, prev_sp;
struct reader_state *state = (struct reader_state *) self->priv_data;
if (!read_register (cbs, AMD64_RA, &this_ip))
return GDB_FAIL;
if (this_ip >= state->code_end || this_ip < state->code_begin)
return GDB_FAIL;
if (!read_register (cbs, AMD64_RSP, &this_sp))
return GDB_FAIL;
if (cbs->target_read (this_sp, &prev_ip, word_size) == GDB_FAIL)
return GDB_FAIL;
prev_sp = this_sp + word_size;
write_register (cbs, AMD64_RA, prev_ip);
write_register (cbs, AMD64_RSP, prev_sp);
return GDB_SUCCESS;
}
static struct gdb_frame_id
get_frame_id (struct gdb_reader_funcs *self, struct gdb_unwind_callbacks *cbs)
{
struct reader_state *state = (struct reader_state *) self->priv_data;
struct gdb_frame_id frame_id;
uintptr_t sp;
read_register (cbs, AMD64_RSP, &sp);
frame_id.code_address = (GDB_CORE_ADDR) state->code_begin;
frame_id.stack_address = (GDB_CORE_ADDR) sp;
return frame_id;
}
static void
destroy_reader (struct gdb_reader_funcs *self)
{
free (self->priv_data);
free (self);
}
struct gdb_reader_funcs *
gdb_init_reader (void)
{
struct reader_state *state = malloc (sizeof (struct reader_state));
struct gdb_reader_funcs *reader_funcs =
malloc (sizeof (struct gdb_reader_funcs));
reader_funcs->reader_version = GDB_READER_INTERFACE_VERSION;
reader_funcs->priv_data = state;
reader_funcs->read = read_debug_info;
reader_funcs->unwind = unwind_frame;
reader_funcs->get_frame_id = get_frame_id;
reader_funcs->destroy = destroy_reader;
return reader_funcs;
}