diff options
Diffstat (limited to 'gdb/testsuite/gdb.base')
| -rw-r--r-- | gdb/testsuite/gdb.base/bigcore.c | 192 | ||||
| -rw-r--r-- | gdb/testsuite/gdb.base/bigcore.exp | 172 |
2 files changed, 364 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.base/bigcore.c b/gdb/testsuite/gdb.base/bigcore.c new file mode 100644 index 00000000000..d6a6ef4b1d8 --- /dev/null +++ b/gdb/testsuite/gdb.base/bigcore.c @@ -0,0 +1,192 @@ +/* This testcase is part of GDB, the GNU debugger. + + Copyright 2004 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + + Please email any bugs, comments, and/or additions to this file to: + bug-gdb@prep.ai.mit.edu */ + +#include <unistd.h> +#include <stdlib.h> +#include <sys/resource.h> + +/* Print routines: + + The following are so that printf et.al. can be avoided. Those + might try to use malloc() and that, for this code, would be a + disaster. */ + +#define printf do not use + +const char digit[] = "0123456789abcdefghijklmnopqrstuvwxyz"; + +static void +print_char (char c) +{ + write (1, &c, sizeof (c)); +} + +static void +print_unsigned (unsigned long u) +{ + if (u >= 10) + print_unsigned (u / 10); + print_char (digit[u % 10]); +} + +static void +print_hex (unsigned long u) +{ + if (u >= 16) + print_hex (u / 16); + print_char (digit[u % 16]); +} + +static void +print_string (const char *s) +{ + for (; (*s) != '\0'; s++) + print_char ((*s)); +} + +static void +print_address (const void *a) +{ + print_string ("0x"); + print_hex ((unsigned long) a); +} + +/* Print the current values of RESOURCE. */ + +static void +print_rlimit (int resource) +{ + struct rlimit rl; + getrlimit (resource, &rl); + print_string ("cur=0x"); + print_hex (rl.rlim_cur); + print_string (" max=0x"); + print_hex (rl.rlim_max); +} + +static void +maximize_rlimit (int resource, const char *prefix) +{ + struct rlimit rl; + print_string (" "); + print_string (prefix); + print_string (": "); + print_rlimit (resource); + getrlimit (resource, &rl); + rl.rlim_cur = rl.rlim_max; + setrlimit (resource, &rl); + print_string (" -> "); + print_rlimit (resource); + print_string ("\n"); +} + +struct list +{ + struct list *next; + size_t size; +}; + +/* Put the "heap" pointer in the BSS section. That way it is more + likely that the variable will occur early in the core file (an + address before the heap) and hence more likely that GDB will at + least get its value right. */ + +static struct list *heap; +static struct list *stack; + +int +main () +{ + size_t max_chunk_size; + + /* Try to expand all the resource limits beyond the point of sanity + - we're after the biggest possible core file. */ + + print_string ("Maximize resource limits ...\n"); +#ifdef RLIMIT_CORE + maximize_rlimit (RLIMIT_CORE, "core"); +#endif +#ifdef RLIMIT_DATA + maximize_rlimit (RLIMIT_DATA, "data"); +#endif +#ifdef RLIMIT_STACK + maximize_rlimit (RLIMIT_STACK, "stack"); +#endif +#ifdef RLIMIT_AS + maximize_rlimit (RLIMIT_AS, "stack"); +#endif + + /* Compute an initial chunk size. The math is dodgy but it works + for the moment. Perhaphs there's a constant around somewhere. */ + { + size_t tmp; + for (tmp = 1; tmp > 0; tmp <<= 1) + max_chunk_size = tmp; + } + + /* Allocate as much memory as possible creating a linked list of + each section. The linking ensures that some, but not all, the + memory is allocated. NB: Some kernels handle this efficiently - + only allocating and writing out referenced pages leaving holes in + the file for unreferend pages - while others handle this poorly - + writing out all pages including those that wern't referenced. */ + + print_string ("Alocating the entire heap ...\n"); + { + /* Create a linked list of memory chunks. Start with + MAX_CHUNK_SIZE blocks of memory and then try allocating smaller + and smaller amounts until all (well at least most) memory has + been allocated. */ + size_t chunk_size = max_chunk_size; + heap = NULL; + while (chunk_size >= sizeof (struct list)) + { + while (1) + { + struct list *chunk = malloc (chunk_size); + if (chunk == NULL) + { + if (heap != NULL && heap->size == chunk_size) + print_string ("\n"); + break; + } + if (heap == NULL || heap->size != chunk_size) + { + print_string (" "); + print_unsigned (chunk_size); + print_string (" bytes @ "); + } + else + print_string (", "); + chunk->size = chunk_size; + chunk->next = heap; + print_address (chunk); + heap = chunk; + } + chunk_size >>= 1; + } + } + + /* Push everything out to disk. */ + + print_string ("Dump core ....\n"); + *(char*)0 = 0; +} diff --git a/gdb/testsuite/gdb.base/bigcore.exp b/gdb/testsuite/gdb.base/bigcore.exp new file mode 100644 index 00000000000..82b01b3a10b --- /dev/null +++ b/gdb/testsuite/gdb.base/bigcore.exp @@ -0,0 +1,172 @@ +# Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2004 +# 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 2 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, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +# Please email any bugs, comments, and/or additions to this file to: +# bug-gdb@prep.ai.mit.edu + +# This file is based on corefile.exp which was written by Fred +# Fish. (fnf@cygnus.com) + +if $tracelevel then { + strace $tracelevel +} + +set prms_id 0 +set bug_id 0 + +# are we on a target board +if ![isnative] then { + return +} + +set testfile "bigcore" +set srcfile ${testfile}.c +set binfile ${objdir}/${subdir}/${testfile} +set corefile ${objdir}/${subdir}/${testfile}.corefile + +if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { + gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail." +} + +# Create a core file named "TESTFILE.corefile" rather than just +# "core", to avoid problems with sys admin types that like to +# regularly prune all files named "core" from the system. + +# Some systems append "core" to the name of the program; others append +# the name of the program to "core"; still others (like Linux, as of +# May 2003) create cores named "core.PID". In the latter case, we +# could have many core files lying around, and it may be difficult to +# tell which one is ours, so let's run the program in a subdirectory. + +set found 0 +set coredir "${objdir}/${subdir}/coredir.[getpid]" +file mkdir $coredir +catch "system \"(cd ${coredir}; ${binfile}; true) >/dev/null 2>&1\"" +set names [glob -nocomplain -directory $coredir *core*] +if {[llength $names] == 1} { + set file [file join $coredir [lindex $names 0]] + remote_exec build "mv $file $corefile" + set found 1 +} + +# Try to clean up after ourselves. +remote_file build delete [file join $coredir coremmap.data] +remote_exec build "rmdir $coredir" + +if { $found == 0 } { + warning "can't generate a core file - core tests suppressed - check ulimit -c" + return 0 +} + +# Run GDB on the bigcore program up-to where it will dump core. + +gdb_exit +gdb_start +gdb_reinitialize_dir $srcdir/$subdir +gdb_load ${binfile} +gdb_test "set print sevenbit-strings" "" \ + "set print sevenbit-strings; ${testfile}" +gdb_test "set width 0" "" \ + "set width 0; ${testfile}" +if { ![runto_main] } then { + gdb_suppress_tests; +} +set print_core_line [gdb_get_line_number "Dump core"] +gdb_test "tbreak $print_core_line" +gdb_test continue ".*print_string.*" +gdb_test next ".*0 = 0.*" + +# Traverse bigcore's linked list, saving each chunk's address. I +# don't know why but expect_out didn't work with gdb_test_multiple. + +set heap "" +set test "extract heap" +set lim 0 +send_gdb "print heap\n" +gdb_expect { + -re " = \\(struct list \\*\\) 0x0.*$gdb_prompt $" { + pass "$test" + } + -re " = \\(struct list \\*\\) (0x\[0-9a-f\]*).*$gdb_prompt $" { + set heap [concat $heap $expect_out(1,string)] + if { $lim > 100 } { + fail "$test (limit $lim exceeded)" + } else { + incr lim + send_gdb "print $.next\n" + exp_continue + } + } + -re ".*$gdb_prompt $" { + fail "$test (entry $lim)" + } + timeout { + fail "$test (timeout)" + } +} + +# Now load up that core file + +set test "load corefile" +gdb_test_multiple "core $corefile" "$test" { + -re "A program is being debugged already. Kill it. .y or n. " { + send_gdb "y\n" + exp_continue + } + -re "Core was generated by.*$gdb_prompt $" { + pass "$test" + } +} + +# Finally, re-traverse bigcore's linked list, checking each chunk's +# address against the executable. Don't use gdb_test_multiple as want +# only one pass/fail. + +set test "check heap" +set lim 0 +set ok 1 +send_gdb "print heap\n" +while { $ok } { + gdb_expect { + -re " = \\(struct list \\*\\) 0x0.*$gdb_prompt $" { + set ok 0 + if { $lim == [llength $heap] } { + pass "$test" + } else { + fail "$test (short list)" + } + } + -re " = \\(struct list \\*\\) [lindex $heap $lim].*$gdb_prompt $" { + incr lim + if { $lim > 100 } { + set ok 0 + fail "$test (limit $lim exceeded)" + } else { + send_gdb "print \$.next\n" + } + } + -re ".*$gdb_prompt $" { + set ok 0 + setup_kfail i*86-*-linux* gdb/1509 + fail "$test (address [lindex $heap $lim])" + } + timeout { + set ok 0 + fail "$test (timeout)" + } + } +} |