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gdb-rhbz795424-bitpos-21of25.patch
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File gdb-rhbz795424-bitpos-21of25.patch of Package gdb.7427
http://sourceware.org/ml/gdb-patches/2012-09/msg00632.html Subject: [PATCH 2/4] Add a check to ensure that a type may fit into host memory --MP_/PnL6l3LUsXWpZ/olqawWlzb Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi, This is part two of the bitpos expansion patch. This implements checks in some places in the code to ensure that a type size in ULONGEST is small enough to fit into host memory. Tested for regressions on x86_64 Fedora 16. Regards, Siddhesh --MP_/PnL6l3LUsXWpZ/olqawWlzb Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Content-Disposition: attachment; filename=ChangeLog-ensure_sizet gdb/ChangeLog * alpha-tdep.c (alpha_push_dummy_call) Check for underflow in SP. * cp-valprint (cp_print_value): Ensure BASECLASS fits into size_t. * dwarf2loc.c (read_pieced_value): Ensure that THIS_SIZE fits into size_t. (write_pieced_value): Likewise. * findcmd.c (parse_find_args): Ensure PATTERN_BUF_SIZE fits into size_t. * p-valprint (pascal_object_print_value): Ensure BASECLASS fits into size_t. * utils.c (ulongest_fits_host_or_error): New function to find if a ULONGEST number fits into size_t. * utils.h: Declare ulongest_fits_host_or_error. * valops.c (search_struct_method): Ensure BASECLASS fits into size_t. * value.c (allocate_value_lazy): Ensure TYPE fits into size_t. (allocate_value_contents): Likewise. (set_value_enclosing_type): Ensure NEW_ENCL_TYPE fits into size_t. * vax-tdep.c (vax_return_value): Ensure that TYPE fits into size_t. --MP_/PnL6l3LUsXWpZ/olqawWlzb Content-Type: text/x-patch Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=bitpos-ensure-size_t.patch Index: gdb-8.0/gdb/alpha-tdep.c =================================================================== --- gdb-8.0.orig/gdb/alpha-tdep.c 2017-08-19 20:07:45.469330496 +0200 +++ gdb-8.0/gdb/alpha-tdep.c 2017-08-19 20:07:50.670379152 +0200 @@ -414,6 +414,13 @@ accumulate_size = 0; else accumulate_size -= sizeof(arg_reg_buffer); + + /* Check for underflow. */ + if (sp - accumulate_size > sp) + error (_("Insufficient memory in GDB host for arguments, " + "need %s bytes, but less than %s bytes available."), + plongest (accumulate_size), plongest (CORE_ADDR_MAX - sp)); + sp -= accumulate_size; /* Keep sp aligned to a multiple of 16 as the ABI requires. */ Index: gdb-8.0/gdb/cp-valprint.c =================================================================== --- gdb-8.0.orig/gdb/cp-valprint.c 2017-08-19 20:07:45.470330505 +0200 +++ gdb-8.0/gdb/cp-valprint.c 2017-08-19 20:07:50.670379152 +0200 @@ -537,6 +537,8 @@ gdb_byte *buf; struct cleanup *back_to; + ulongest_fits_host_or_error (TYPE_LENGTH (baseclass)); + buf = (gdb_byte *) xmalloc (TYPE_LENGTH (baseclass)); back_to = make_cleanup (xfree, buf); Index: gdb-8.0/gdb/findcmd.c =================================================================== --- gdb-8.0.orig/gdb/findcmd.c 2017-08-19 20:07:45.472330524 +0200 +++ gdb-8.0/gdb/findcmd.c 2017-08-19 20:07:50.672379171 +0200 @@ -186,6 +186,7 @@ size_t current_offset = pattern_buf_end - pattern_buf; pattern_buf_size = pattern_buf_size_need * 2; + ulongest_fits_host_or_error (pattern_buf_size); pattern_buf = (gdb_byte *) xrealloc (pattern_buf, pattern_buf_size); pattern_buf_end = pattern_buf + current_offset; } Index: gdb-8.0/gdb/p-valprint.c =================================================================== --- gdb-8.0.orig/gdb/p-valprint.c 2017-08-19 20:07:45.472330524 +0200 +++ gdb-8.0/gdb/p-valprint.c 2017-08-19 20:07:50.673379180 +0200 @@ -772,6 +772,7 @@ gdb_byte *buf; struct cleanup *back_to; + ulongest_fits_host_or_error (TYPE_LENGTH (baseclass)); buf = (gdb_byte *) xmalloc (TYPE_LENGTH (baseclass)); back_to = make_cleanup (xfree, buf); Index: gdb-8.0/gdb/utils.c =================================================================== --- gdb-8.0.orig/gdb/utils.c 2017-08-19 20:07:45.473330533 +0200 +++ gdb-8.0/gdb/utils.c 2017-08-19 20:07:50.673379180 +0200 @@ -2776,6 +2776,18 @@ return addr; } +/* Ensure that the input NUM is not larger than the maximum capacity of the + host system. We choose SIZE_MAX / 8 as a conservative estimate of the size + of a resource that a system may allocate. */ +void +ulongest_fits_host_or_error (ULONGEST num) +{ + if (num > SIZE_MAX / 8) + error (_("Insufficient memory in host GDB for object of size %s bytes, " + "maximum allowed %s bytes."), pulongest (num), + pulongest (SIZE_MAX / 8)); +} + char * gdb_realpath (const char *filename) { Index: gdb-8.0/gdb/valops.c =================================================================== --- gdb-8.0.orig/gdb/valops.c 2017-08-19 20:07:45.474330542 +0200 +++ gdb-8.0/gdb/valops.c 2017-08-19 20:07:50.674379190 +0200 @@ -2100,6 +2100,7 @@ struct cleanup *back_to; CORE_ADDR address; + ulongest_fits_host_or_error (TYPE_LENGTH (baseclass)); tmp = (gdb_byte *) xmalloc (TYPE_LENGTH (baseclass)); back_to = make_cleanup (xfree, tmp); address = value_address (*arg1p); Index: gdb-8.0/gdb/value.c =================================================================== --- gdb-8.0.orig/gdb/value.c 2017-08-19 20:07:45.476330561 +0200 +++ gdb-8.0/gdb/value.c 2017-08-19 20:07:50.675379199 +0200 @@ -936,6 +936,7 @@ description correctly. */ check_typedef (type); + ulongest_fits_host_or_error (TYPE_LENGTH (type)); val = XCNEW (struct value); val->contents = NULL; val->next = all_values; @@ -1033,6 +1034,8 @@ static void allocate_value_contents (struct value *val) { + ulongest_fits_host_or_error (TYPE_LENGTH (val->enclosing_type)); + if (!val->contents) { check_type_length_before_alloc (val->enclosing_type); @@ -3093,6 +3096,7 @@ if (TYPE_LENGTH (new_encl_type) > TYPE_LENGTH (value_enclosing_type (val))) { check_type_length_before_alloc (new_encl_type); + ulongest_fits_host_or_error (TYPE_LENGTH (new_encl_type)); val->contents = (gdb_byte *) xrealloc (val->contents, TYPE_LENGTH (new_encl_type)); } Index: gdb-8.0/gdb/vax-tdep.c =================================================================== --- gdb-8.0.orig/gdb/vax-tdep.c 2017-08-19 20:07:45.476330561 +0200 +++ gdb-8.0/gdb/vax-tdep.c 2017-08-19 20:07:50.675379199 +0200 @@ -219,6 +219,7 @@ ULONGEST addr; regcache_raw_read_unsigned (regcache, VAX_R0_REGNUM, &addr); + ulongest_fits_host_or_error (TYPE_LENGTH (type)); read_memory (addr, readbuf, len); } Index: gdb-8.0/gdb/defs.h =================================================================== --- gdb-8.0.orig/gdb/defs.h 2017-08-19 20:07:45.476330561 +0200 +++ gdb-8.0/gdb/defs.h 2017-08-19 20:07:50.676379208 +0200 @@ -750,4 +750,6 @@ #include "utils.h" +extern void ulongest_fits_host_or_error (ULONGEST num); + #endif /* #ifndef DEFS_H */
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