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It may be useful in case syscall is not present on the target
architecture.
* qualify.c (qualify_syscall): Add ignore_fail flag, set it to true
in case syscall qualification is led by a question mark(s).
* strace.1 (.SS Filtering): Document ability to use question marks
in syscall qualification.
* qualify.c: Include <regex.h>.
(qualify_syscall_regex): New function.
(qualify_syscall): Use it.
* strace.1: Document -e trace=/regex option.
* NEWS: Mention -e trace=/regex option.
* tests/regex.test: New test.
* tests/Makefile.am (DECODER_TESTS): Add it.
* tests/options-syntax.test: Add checks for invaild regexp
and for regexp that doesn't match a syscall.
(as suggested in
https://www.mail-archive.com/strace-devel@lists.sourceforge.net/msg05147.html )
In order to move them to a different namespace than syscall names. This is
already a problem in case of ipc class which shadows ipc syscall.
Old behaviour is retained in order to preserve backwards compatibility.
* qualify.c (lookup_class) <syscall_class>: Add %-prefixed class definitions.
* strace.1 (.SS Filtering): Add information regarding %-prefixed class
syntax, declare legacy class syntax deprecated.
* tests/net.test: Update to use %-prefixed syscall class name.
* tests/netlink_protocol.test: Likewise.
* tests/qual_fault-exit_group.test: Likewise.
* tests/qual_syscall.test: Likewise.
* tests/scm_rights-fd.test: Likewise.
* tests/sigreturn.test: Likewise.
* tests/uio.test: Likewise.
* NEWS: Mention this change.
Drop use of INJECT_OPTS_RVAL_DISABLE special inject_opts.rval value,
INJECT_OPTS_RVAL_DEFAULT is enough.
* defs.h (INJECT_OPTS_RVAL_DISABLE): Remove.
* qualify.c (qualify_inject_common): Do not replace
INJECT_OPTS_RVAL_DEFAULT with INJECT_OPTS_RVAL_DISABLE
in inject_opts.rval.
* syscall.c (tamper_with_syscall_entering): Check
for INJECT_OPTS_RVAL_DEFAULT instead of INJECT_OPTS_RVAL_DISABLE.
Follow the example of case-insensitive symbolic signal values in signal
and inject expressions and make symbolic errno values in inject
expressions case-insensitive.
* qualify.c (find_errno_by_name): Use strcasecmp instead of strcmp
to match symbolic errno values.
* tests/qual_fault.c (main): Likewise.
* tests/qual_fault.test: Test case-insensitive symbolic errno match.
Introduce -e inject= as a general injection option,
limit -e fault= option to syscall fault injection.
Change default return code of syscall fault injection to ENOSYS.
* qualify.c (parse_inject_token): Add fault_tokens_only argument,
do not accept retval= and signal= tokens when fault_tokens_only
is set to true.
(parse_inject_expression): Add fault_tokens_only argument,
forward it to parse_inject_token.
(qualify_inject_common): New function.
(qualify_fault): Use it.
(qualify_inject): New function.
(qual_options): New entry.
* strace.1: Describe -e inject= option.
* NEWS: Mention -e inject= option.
* tests/qual_fault-syntax.test: Test that -e fault= option does not
support retval=, signal=, and multiple error= tokens.
* tests/qual_fault.c (DEFAULT_ERRNO): Set to ENOSYS unconditionally.
* tests/qual_inject-retval.test: Replace -e fault= option
with -e inject= option.
* tests/qual_inject-syntax.test: New test.
* tests/Makefile.am (MISC_TESTS): Add it.
As -e fault= injection syntax has been extended to configure various
kinds of injections besides fault injection, the original option name
bacame too narrow.
This change renames internal constants, types, and functions from
"fault" to more generic inject/tamper ones.
* defs.h (fault_opts): Rename to inject_opts.
(FAULT_OPTS_RVAL_DEFAULT): Rename to INJECT_OPTS_RVAL_DEFAULT.
(FAULT_OPTS_RVAL_DISABLE): Rename to INJECT_OPTS_RVAL_DISABLE.
(struct tcb): Rename fault_vec field to inject_vec.
(TCB_FAULT_INJ): Rename to TCB_TAMPERED.
(QUAL_FAULT): Rename to QUAL_INJECT.
(fault_vec): Rename to inject_vec.
All users changed.
* qualify.c (fault_set): Rename to inject_set.
(parse_fault_token): Rename to parse_inject_token.
(parse_fault_expression): Rename to parse_inject_expression.
All callers changed.
* syscall.c (fault_vec): Rename to inject_vec.
(tcb_fault_opts): Rename to tcb_inject_opts.
(inject_syscall_fault_entering): Rename to tamper_with_syscall_entering.
(update_syscall_fault_exiting): Rename to tamper_with_syscall_exiting.
(syscall_fault_injected): Rename to syscall_tampered.
All callers changed.
This extends the fault injection capability with :signal=SIG option
which injects a signal on entering each syscall from the specified set.
:signal and :error options are complementary, if they are both specified
the syscall will be fault injected as usual and the specified signal
will be delivered to the tracee.
* defs.h (struct fault_opts): Change the type of err field to int16_t,
add signo field.
(trace_syscall): Add a pointer argument.
* qualify.c: Include "nsig.h".
(parse_fault_token): Handle signal= option.
(qualify_fault): Update default fault_opts.
* strace.c (trace): Forward signal number from trace_syscall
to ptrace_restart(PTRACE_SYSCALL).
* syscall.c (inject_syscall_fault_entering): Add pointer argument,
save there the signal number specified by fault options. Do not inject
a syscall fault unless instructed by fault options.
(update_syscall_fault_exiting): Update the error code injection check.
(trace_syscall_entering): Add pointer argument, forward it to
inject_syscall_fault_entering.
(trace_syscall): Add pointer argument, forward it to
trace_syscall_entering.
Signed-off-by: Seraphime Kirkovski <kirkseraph@gmail.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
* defs.h (signal_set): New variable prototypes.
(qualify_signals): New function prototypes.
(QUAL_SIGNAL): Change to a value greater than 0xff.
(QUAL_FAULT): Change to a lower value.
* qualify.c (signal_set): New variable.
(sigstr_to_uint, qualify_signals): New functions.
* syscall.c (qual_signal): Remove.
(qual_options): Replace qual_signal with NULL.
(qualify): Use qualify_signals.
* strace.c (print_signalled, print_stopped): Use is_number_in_set
with signal_set argument.
As a side effect, this also fixes support of negated sets
of descriptors.
* defs.h (struct number_set): New forward declaration.
(read_set, write_set): New variable prototypes.
(is_number_in_set, qualify_read, qualify_write): New function
prototypes.
(QUAL_READ, QUAL_WRITE): Change to values greater than 0xff.
* qualify.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* syscall.c (qual_desc): Remove.
(qual_options): Replace qual_desc with NULL.
(qualify): Use qualify_read and qualify_write.
(dumpio): Use is_number_in_set.
* tests/options-syntax.test: Check invalid sets of descriptors.
* tests/readv.test: Check dumping of negated sets of descriptors.
