Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Mostly tooling fixes, but also breakpoint and x86 PMU driver fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  perf tools: Fix maps__find_symbol_by_name()
  tools headers uapi: Update tools's copy of linux/if_link.h
  tools headers uapi: Update tools's copy of linux/vhost.h
  tools headers uapi: Update tools's copies of kvm headers
  tools headers uapi: Update tools's copy of drm/drm.h
  tools headers uapi: Update tools's copy of asm-generic/unistd.h
  tools headers uapi: Update tools's copy of linux/perf_event.h
  perf/core: Force USER_DS when recording user stack data
  perf/UAPI: Clearly mark __PERF_SAMPLE_CALLCHAIN_EARLY as internal use
  perf/x86/intel: Add support/quirk for the MISPREDICT bit on Knights Landing CPUs
  perf annotate: Fix parsing aarch64 branch instructions after objdump update
  perf probe powerpc: Ignore SyS symbols irrespective of endianness
  perf event-parse: Use fixed size string for comms
  perf util: Fix bad memory access in trace info.
  perf tools: Streamline bpf examples and headers installation
  perf evsel: Fix potential null pointer dereference in perf_evsel__new_idx()
  perf arm64: Fix include path for asm-generic/unistd.h
  perf/hw_breakpoint: Simplify breakpoint enable in perf_event_modify_breakpoint
  perf/hw_breakpoint: Enable breakpoint in modify_user_hw_breakpoint
  perf/hw_breakpoint: Remove superfluous bp->attr.disabled = 0
  ...
This commit is contained in:
Linus Torvalds 2018-09-15 06:44:32 -10:00
commit c0be92b5b1
28 changed files with 423 additions and 43 deletions

View File

@ -1272,4 +1272,8 @@ void intel_pmu_lbr_init_knl(void)
x86_pmu.lbr_sel_mask = LBR_SEL_MASK;
x86_pmu.lbr_sel_map = snb_lbr_sel_map;
/* Knights Landing does have MISPREDICT bit */
if (x86_pmu.intel_cap.lbr_format == LBR_FORMAT_LIP)
x86_pmu.intel_cap.lbr_format = LBR_FORMAT_EIP_FLAGS;
}

View File

@ -144,7 +144,7 @@ enum perf_event_sample_format {
PERF_SAMPLE_MAX = 1U << 20, /* non-ABI */
__PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63,
__PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63, /* non-ABI; internal use */
};
/*

View File

@ -2867,16 +2867,11 @@ static int perf_event_modify_breakpoint(struct perf_event *bp,
_perf_event_disable(bp);
err = modify_user_hw_breakpoint_check(bp, attr, true);
if (err) {
if (!bp->attr.disabled)
_perf_event_enable(bp);
return err;
}
if (!attr->disabled)
if (!bp->attr.disabled)
_perf_event_enable(bp);
return 0;
return err;
}
static int perf_event_modify_attr(struct perf_event *event,
@ -5948,6 +5943,7 @@ perf_output_sample_ustack(struct perf_output_handle *handle, u64 dump_size,
unsigned long sp;
unsigned int rem;
u64 dyn_size;
mm_segment_t fs;
/*
* We dump:
@ -5965,7 +5961,10 @@ perf_output_sample_ustack(struct perf_output_handle *handle, u64 dump_size,
/* Data. */
sp = perf_user_stack_pointer(regs);
fs = get_fs();
set_fs(USER_DS);
rem = __output_copy_user(handle, (void *) sp, dump_size);
set_fs(fs);
dyn_size = dump_size - rem;
perf_output_skip(handle, rem);

View File

@ -509,6 +509,8 @@ modify_user_hw_breakpoint_check(struct perf_event *bp, struct perf_event_attr *a
*/
int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr)
{
int err;
/*
* modify_user_hw_breakpoint can be invoked with IRQs disabled and hence it
* will not be possible to raise IPIs that invoke __perf_event_disable.
@ -520,15 +522,12 @@ int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *att
else
perf_event_disable(bp);
if (!attr->disabled) {
int err = modify_user_hw_breakpoint_check(bp, attr, false);
err = modify_user_hw_breakpoint_check(bp, attr, false);
if (err)
return err;
if (!bp->attr.disabled)
perf_event_enable(bp);
bp->attr.disabled = 0;
}
return 0;
return err;
}
EXPORT_SYMBOL_GPL(modify_user_hw_breakpoint);

View File

@ -27,6 +27,7 @@
#define __KVM_HAVE_GUEST_DEBUG
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
#define __KVM_HAVE_VCPU_EVENTS
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
@ -125,6 +126,18 @@ struct kvm_sync_regs {
struct kvm_arch_memory_slot {
};
/* for KVM_GET/SET_VCPU_EVENTS */
struct kvm_vcpu_events {
struct {
__u8 serror_pending;
__u8 serror_has_esr;
/* Align it to 8 bytes */
__u8 pad[6];
__u64 serror_esr;
} exception;
__u32 reserved[12];
};
/* If you need to interpret the index values, here is the key: */
#define KVM_REG_ARM_COPROC_MASK 0x000000000FFF0000
#define KVM_REG_ARM_COPROC_SHIFT 16

View File

@ -39,6 +39,7 @@
#define __KVM_HAVE_GUEST_DEBUG
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
#define __KVM_HAVE_VCPU_EVENTS
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
@ -154,6 +155,18 @@ struct kvm_sync_regs {
struct kvm_arch_memory_slot {
};
/* for KVM_GET/SET_VCPU_EVENTS */
struct kvm_vcpu_events {
struct {
__u8 serror_pending;
__u8 serror_has_esr;
/* Align it to 8 bytes */
__u8 pad[6];
__u64 serror_esr;
} exception;
__u32 reserved[12];
};
/* If you need to interpret the index values, here is the key: */
#define KVM_REG_ARM_COPROC_MASK 0x000000000FFF0000
#define KVM_REG_ARM_COPROC_SHIFT 16

View File

@ -4,7 +4,7 @@
/*
* KVM s390 specific structures and definitions
*
* Copyright IBM Corp. 2008
* Copyright IBM Corp. 2008, 2018
*
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Christian Borntraeger <borntraeger@de.ibm.com>
@ -225,6 +225,7 @@ struct kvm_guest_debug_arch {
#define KVM_SYNC_FPRS (1UL << 8)
#define KVM_SYNC_GSCB (1UL << 9)
#define KVM_SYNC_BPBC (1UL << 10)
#define KVM_SYNC_ETOKEN (1UL << 11)
/* length and alignment of the sdnx as a power of two */
#define SDNXC 8
#define SDNXL (1UL << SDNXC)
@ -258,6 +259,8 @@ struct kvm_sync_regs {
struct {
__u64 reserved1[2];
__u64 gscb[4];
__u64 etoken;
__u64 etoken_extension;
};
};
};

View File

@ -378,4 +378,41 @@ struct kvm_sync_regs {
#define KVM_X86_QUIRK_LINT0_REENABLED (1 << 0)
#define KVM_X86_QUIRK_CD_NW_CLEARED (1 << 1)
#define KVM_STATE_NESTED_GUEST_MODE 0x00000001
#define KVM_STATE_NESTED_RUN_PENDING 0x00000002
#define KVM_STATE_NESTED_SMM_GUEST_MODE 0x00000001
#define KVM_STATE_NESTED_SMM_VMXON 0x00000002
struct kvm_vmx_nested_state {
__u64 vmxon_pa;
__u64 vmcs_pa;
struct {
__u16 flags;
} smm;
};
/* for KVM_CAP_NESTED_STATE */
struct kvm_nested_state {
/* KVM_STATE_* flags */
__u16 flags;
/* 0 for VMX, 1 for SVM. */
__u16 format;
/* 128 for SVM, 128 + VMCS size for VMX. */
__u32 size;
union {
/* VMXON, VMCS */
struct kvm_vmx_nested_state vmx;
/* Pad the header to 128 bytes. */
__u8 pad[120];
};
__u8 data[0];
};
#endif /* _ASM_X86_KVM_H */

View File

@ -734,9 +734,11 @@ __SYSCALL(__NR_pkey_free, sys_pkey_free)
__SYSCALL(__NR_statx, sys_statx)
#define __NR_io_pgetevents 292
__SC_COMP(__NR_io_pgetevents, sys_io_pgetevents, compat_sys_io_pgetevents)
#define __NR_rseq 293
__SYSCALL(__NR_rseq, sys_rseq)
#undef __NR_syscalls
#define __NR_syscalls 293
#define __NR_syscalls 294
/*
* 32 bit systems traditionally used different

View File

@ -687,6 +687,15 @@ struct drm_get_cap {
*/
#define DRM_CLIENT_CAP_ASPECT_RATIO 4
/**
* DRM_CLIENT_CAP_WRITEBACK_CONNECTORS
*
* If set to 1, the DRM core will expose special connectors to be used for
* writing back to memory the scene setup in the commit. Depends on client
* also supporting DRM_CLIENT_CAP_ATOMIC
*/
#define DRM_CLIENT_CAP_WRITEBACK_CONNECTORS 5
/** DRM_IOCTL_SET_CLIENT_CAP ioctl argument type */
struct drm_set_client_cap {
__u64 capability;

View File

@ -164,6 +164,8 @@ enum {
IFLA_CARRIER_UP_COUNT,
IFLA_CARRIER_DOWN_COUNT,
IFLA_NEW_IFINDEX,
IFLA_MIN_MTU,
IFLA_MAX_MTU,
__IFLA_MAX
};
@ -334,6 +336,7 @@ enum {
IFLA_BRPORT_GROUP_FWD_MASK,
IFLA_BRPORT_NEIGH_SUPPRESS,
IFLA_BRPORT_ISOLATED,
IFLA_BRPORT_BACKUP_PORT,
__IFLA_BRPORT_MAX
};
#define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
@ -459,6 +462,16 @@ enum {
#define IFLA_MACSEC_MAX (__IFLA_MACSEC_MAX - 1)
/* XFRM section */
enum {
IFLA_XFRM_UNSPEC,
IFLA_XFRM_LINK,
IFLA_XFRM_IF_ID,
__IFLA_XFRM_MAX
};
#define IFLA_XFRM_MAX (__IFLA_XFRM_MAX - 1)
enum macsec_validation_type {
MACSEC_VALIDATE_DISABLED = 0,
MACSEC_VALIDATE_CHECK = 1,
@ -920,6 +933,7 @@ enum {
XDP_ATTACHED_DRV,
XDP_ATTACHED_SKB,
XDP_ATTACHED_HW,
XDP_ATTACHED_MULTI,
};
enum {
@ -928,6 +942,9 @@ enum {
IFLA_XDP_ATTACHED,
IFLA_XDP_FLAGS,
IFLA_XDP_PROG_ID,
IFLA_XDP_DRV_PROG_ID,
IFLA_XDP_SKB_PROG_ID,
IFLA_XDP_HW_PROG_ID,
__IFLA_XDP_MAX,
};

View File

@ -949,6 +949,9 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_GET_MSR_FEATURES 153
#define KVM_CAP_HYPERV_EVENTFD 154
#define KVM_CAP_HYPERV_TLBFLUSH 155
#define KVM_CAP_S390_HPAGE_1M 156
#define KVM_CAP_NESTED_STATE 157
#define KVM_CAP_ARM_INJECT_SERROR_ESR 158
#ifdef KVM_CAP_IRQ_ROUTING
@ -1391,6 +1394,9 @@ struct kvm_enc_region {
/* Available with KVM_CAP_HYPERV_EVENTFD */
#define KVM_HYPERV_EVENTFD _IOW(KVMIO, 0xbd, struct kvm_hyperv_eventfd)
/* Available with KVM_CAP_NESTED_STATE */
#define KVM_GET_NESTED_STATE _IOWR(KVMIO, 0xbe, struct kvm_nested_state)
#define KVM_SET_NESTED_STATE _IOW(KVMIO, 0xbf, struct kvm_nested_state)
/* Secure Encrypted Virtualization command */
enum sev_cmd_id {

View File

@ -144,7 +144,7 @@ enum perf_event_sample_format {
PERF_SAMPLE_MAX = 1U << 20, /* non-ABI */
__PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63,
__PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63, /* non-ABI; internal use */
};
/*

View File

@ -65,6 +65,7 @@ struct vhost_iotlb_msg {
};
#define VHOST_IOTLB_MSG 0x1
#define VHOST_IOTLB_MSG_V2 0x2
struct vhost_msg {
int type;
@ -74,6 +75,15 @@ struct vhost_msg {
};
};
struct vhost_msg_v2 {
__u32 type;
__u32 reserved;
union {
struct vhost_iotlb_msg iotlb;
__u8 padding[64];
};
};
struct vhost_memory_region {
__u64 guest_phys_addr;
__u64 memory_size; /* bytes */
@ -160,6 +170,14 @@ struct vhost_memory {
#define VHOST_GET_VRING_BUSYLOOP_TIMEOUT _IOW(VHOST_VIRTIO, 0x24, \
struct vhost_vring_state)
/* Set or get vhost backend capability */
/* Use message type V2 */
#define VHOST_BACKEND_F_IOTLB_MSG_V2 0x1
#define VHOST_SET_BACKEND_FEATURES _IOW(VHOST_VIRTIO, 0x25, __u64)
#define VHOST_GET_BACKEND_FEATURES _IOR(VHOST_VIRTIO, 0x26, __u64)
/* VHOST_NET specific defines */
/* Attach virtio net ring to a raw socket, or tap device.

View File

@ -777,14 +777,12 @@ endif
$(call QUIET_INSTALL, libexec) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
ifndef NO_LIBBPF
$(call QUIET_INSTALL, lib) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf'
$(call QUIET_INSTALL, include/bpf) \
$(INSTALL) include/bpf/*.h '$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf'
$(call QUIET_INSTALL, lib) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perf_examples_instdir_SQ)/bpf'
$(call QUIET_INSTALL, examples/bpf) \
$(INSTALL) examples/bpf/*.c '$(DESTDIR_SQ)$(perf_examples_instdir_SQ)/bpf'
$(call QUIET_INSTALL, bpf-headers) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf'; \
$(INSTALL) include/bpf/*.h -t '$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf'
$(call QUIET_INSTALL, bpf-examples) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perf_examples_instdir_SQ)/bpf'; \
$(INSTALL) examples/bpf/*.c -t '$(DESTDIR_SQ)$(perf_examples_instdir_SQ)/bpf'
endif
$(call QUIET_INSTALL, perf-archive) \
$(INSTALL) $(OUTPUT)perf-archive -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'

View File

@ -11,7 +11,8 @@ PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
out := $(OUTPUT)arch/arm64/include/generated/asm
header := $(out)/syscalls.c
sysdef := $(srctree)/tools/include/uapi/asm-generic/unistd.h
incpath := $(srctree)/tools
sysdef := $(srctree)/tools/arch/arm64/include/uapi/asm/unistd.h
sysprf := $(srctree)/tools/perf/arch/arm64/entry/syscalls/
systbl := $(sysprf)/mksyscalltbl
@ -19,7 +20,7 @@ systbl := $(sysprf)/mksyscalltbl
_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)')
$(header): $(sysdef) $(systbl)
$(Q)$(SHELL) '$(systbl)' '$(CC)' '$(HOSTCC)' $(sysdef) > $@
$(Q)$(SHELL) '$(systbl)' '$(CC)' '$(HOSTCC)' $(incpath) $(sysdef) > $@
clean::
$(call QUIET_CLEAN, arm64) $(RM) $(header)

View File

@ -11,7 +11,8 @@
gcc=$1
hostcc=$2
input=$3
incpath=$3
input=$4
if ! test -r $input; then
echo "Could not read input file" >&2
@ -28,7 +29,6 @@ create_table_from_c()
cat <<-_EoHEADER
#include <stdio.h>
#define __ARCH_WANT_RENAMEAT
#include "$input"
int main(int argc, char *argv[])
{
@ -42,7 +42,7 @@ create_table_from_c()
printf "%s\n" " printf(\"#define SYSCALLTBL_ARM64_MAX_ID %d\\n\", __NR_$last_sc);"
printf "}\n"
} | $hostcc -o $create_table_exe -x c -
} | $hostcc -I $incpath/include/uapi -o $create_table_exe -x c -
$create_table_exe

View File

@ -22,15 +22,16 @@ bool elf__needs_adjust_symbols(GElf_Ehdr ehdr)
#endif
#if !defined(_CALL_ELF) || _CALL_ELF != 2
int arch__choose_best_symbol(struct symbol *syma,
struct symbol *symb __maybe_unused)
{
char *sym = syma->name;
#if !defined(_CALL_ELF) || _CALL_ELF != 2
/* Skip over any initial dot */
if (*sym == '.')
sym++;
#endif
/* Avoid "SyS" kernel syscall aliases */
if (strlen(sym) >= 3 && !strncmp(sym, "SyS", 3))
@ -41,6 +42,7 @@ int arch__choose_best_symbol(struct symbol *syma,
return SYMBOL_A;
}
#if !defined(_CALL_ELF) || _CALL_ELF != 2
/* Allow matching against dot variants */
int arch__compare_symbol_names(const char *namea, const char *nameb)
{

View File

@ -9,6 +9,7 @@ struct test;
int test__rdpmc(struct test *test __maybe_unused, int subtest);
int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest);
int test__insn_x86(struct test *test __maybe_unused, int subtest);
int test__bp_modify(struct test *test, int subtest);
#ifdef HAVE_DWARF_UNWIND_SUPPORT
struct thread;

View File

@ -5,3 +5,4 @@ libperf-y += arch-tests.o
libperf-y += rdpmc.o
libperf-y += perf-time-to-tsc.o
libperf-$(CONFIG_AUXTRACE) += insn-x86.o
libperf-$(CONFIG_X86_64) += bp-modify.o

View File

@ -23,6 +23,12 @@ struct test arch_tests[] = {
.desc = "x86 instruction decoder - new instructions",
.func = test__insn_x86,
},
#endif
#if defined(__x86_64__)
{
.desc = "x86 bp modify",
.func = test__bp_modify,
},
#endif
{
.func = NULL,

View File

@ -0,0 +1,213 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/user.h>
#include <syscall.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ptrace.h>
#include <asm/ptrace.h>
#include <errno.h>
#include "debug.h"
#include "tests/tests.h"
#include "arch-tests.h"
static noinline int bp_1(void)
{
pr_debug("in %s\n", __func__);
return 0;
}
static noinline int bp_2(void)
{
pr_debug("in %s\n", __func__);
return 0;
}
static int spawn_child(void)
{
int child = fork();
if (child == 0) {
/*
* The child sets itself for as tracee and
* waits in signal for parent to trace it,
* then it calls bp_1 and quits.
*/
int err = ptrace(PTRACE_TRACEME, 0, NULL, NULL);
if (err) {
pr_debug("failed to PTRACE_TRACEME\n");
exit(1);
}
raise(SIGCONT);
bp_1();
exit(0);
}
return child;
}
/*
* This tests creates HW breakpoint, tries to
* change it and checks it was properly changed.
*/
static int bp_modify1(void)
{
pid_t child;
int status;
unsigned long rip = 0, dr7 = 1;
child = spawn_child();
waitpid(child, &status, 0);
if (WIFEXITED(status)) {
pr_debug("tracee exited prematurely 1\n");
return TEST_FAIL;
}
/*
* The parent does following steps:
* - creates a new breakpoint (id 0) for bp_2 function
* - changes that breakponit to bp_1 function
* - waits for the breakpoint to hit and checks
* it has proper rip of bp_1 function
* - detaches the child
*/
if (ptrace(PTRACE_POKEUSER, child,
offsetof(struct user, u_debugreg[0]), bp_2)) {
pr_debug("failed to set breakpoint, 1st time: %s\n",
strerror(errno));
goto out;
}
if (ptrace(PTRACE_POKEUSER, child,
offsetof(struct user, u_debugreg[0]), bp_1)) {
pr_debug("failed to set breakpoint, 2nd time: %s\n",
strerror(errno));
goto out;
}
if (ptrace(PTRACE_POKEUSER, child,
offsetof(struct user, u_debugreg[7]), dr7)) {
pr_debug("failed to set dr7: %s\n", strerror(errno));
goto out;
}
if (ptrace(PTRACE_CONT, child, NULL, NULL)) {
pr_debug("failed to PTRACE_CONT: %s\n", strerror(errno));
goto out;
}
waitpid(child, &status, 0);
if (WIFEXITED(status)) {
pr_debug("tracee exited prematurely 2\n");
return TEST_FAIL;
}
rip = ptrace(PTRACE_PEEKUSER, child,
offsetof(struct user_regs_struct, rip), NULL);
if (rip == (unsigned long) -1) {
pr_debug("failed to PTRACE_PEEKUSER: %s\n",
strerror(errno));
goto out;
}
pr_debug("rip %lx, bp_1 %p\n", rip, bp_1);
out:
if (ptrace(PTRACE_DETACH, child, NULL, NULL)) {
pr_debug("failed to PTRACE_DETACH: %s", strerror(errno));
return TEST_FAIL;
}
return rip == (unsigned long) bp_1 ? TEST_OK : TEST_FAIL;
}
/*
* This tests creates HW breakpoint, tries to
* change it to bogus value and checks the original
* breakpoint is hit.
*/
static int bp_modify2(void)
{
pid_t child;
int status;
unsigned long rip = 0, dr7 = 1;
child = spawn_child();
waitpid(child, &status, 0);
if (WIFEXITED(status)) {
pr_debug("tracee exited prematurely 1\n");
return TEST_FAIL;
}
/*
* The parent does following steps:
* - creates a new breakpoint (id 0) for bp_1 function
* - tries to change that breakpoint to (-1) address
* - waits for the breakpoint to hit and checks
* it has proper rip of bp_1 function
* - detaches the child
*/
if (ptrace(PTRACE_POKEUSER, child,
offsetof(struct user, u_debugreg[0]), bp_1)) {
pr_debug("failed to set breakpoint: %s\n",
strerror(errno));
goto out;
}
if (ptrace(PTRACE_POKEUSER, child,
offsetof(struct user, u_debugreg[7]), dr7)) {
pr_debug("failed to set dr7: %s\n", strerror(errno));
goto out;
}
if (!ptrace(PTRACE_POKEUSER, child,
offsetof(struct user, u_debugreg[0]), (unsigned long) (-1))) {
pr_debug("failed, breakpoint set to bogus address\n");
goto out;
}
if (ptrace(PTRACE_CONT, child, NULL, NULL)) {
pr_debug("failed to PTRACE_CONT: %s\n", strerror(errno));
goto out;
}
waitpid(child, &status, 0);
if (WIFEXITED(status)) {
pr_debug("tracee exited prematurely 2\n");
return TEST_FAIL;
}
rip = ptrace(PTRACE_PEEKUSER, child,
offsetof(struct user_regs_struct, rip), NULL);
if (rip == (unsigned long) -1) {
pr_debug("failed to PTRACE_PEEKUSER: %s\n",
strerror(errno));
goto out;
}
pr_debug("rip %lx, bp_1 %p\n", rip, bp_1);
out:
if (ptrace(PTRACE_DETACH, child, NULL, NULL)) {
pr_debug("failed to PTRACE_DETACH: %s", strerror(errno));
return TEST_FAIL;
}
return rip == (unsigned long) bp_1 ? TEST_OK : TEST_FAIL;
}
int test__bp_modify(struct test *test __maybe_unused,
int subtest __maybe_unused)
{
TEST_ASSERT_VAL("modify test 1 failed\n", !bp_modify1());
TEST_ASSERT_VAL("modify test 2 failed\n", !bp_modify2());
return 0;
}

View File

@ -246,8 +246,14 @@ find_target:
indirect_call:
tok = strchr(endptr, '*');
if (tok != NULL)
ops->target.addr = strtoull(tok + 1, NULL, 16);
if (tok != NULL) {
endptr++;
/* Indirect call can use a non-rip register and offset: callq *0x8(%rbx).
* Do not parse such instruction. */
if (strstr(endptr, "(%r") == NULL)
ops->target.addr = strtoull(endptr, NULL, 16);
}
goto find_target;
}
@ -276,7 +282,19 @@ bool ins__is_call(const struct ins *ins)
return ins->ops == &call_ops || ins->ops == &s390_call_ops;
}
static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *ops, struct map_symbol *ms)
/*
* Prevents from matching commas in the comment section, e.g.:
* ffff200008446e70: b.cs ffff2000084470f4 <generic_exec_single+0x314> // b.hs, b.nlast
*/
static inline const char *validate_comma(const char *c, struct ins_operands *ops)
{
if (ops->raw_comment && c > ops->raw_comment)
return NULL;
return c;
}
static int jump__parse(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms)
{
struct map *map = ms->map;
struct symbol *sym = ms->sym;
@ -285,6 +303,10 @@ static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *op
};
const char *c = strchr(ops->raw, ',');
u64 start, end;
ops->raw_comment = strchr(ops->raw, arch->objdump.comment_char);
c = validate_comma(c, ops);
/*
* Examples of lines to parse for the _cpp_lex_token@@Base
* function:
@ -304,6 +326,7 @@ static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *op
ops->target.addr = strtoull(c, NULL, 16);
if (!ops->target.addr) {
c = strchr(c, ',');
c = validate_comma(c, ops);
if (c++ != NULL)
ops->target.addr = strtoull(c, NULL, 16);
}
@ -361,9 +384,12 @@ static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.sym->name);
c = strchr(ops->raw, ',');
c = validate_comma(c, ops);
if (c != NULL) {
const char *c2 = strchr(c + 1, ',');
c2 = validate_comma(c2, ops);
/* check for 3-op insn */
if (c2 != NULL)
c = c2;

View File

@ -22,6 +22,7 @@ struct ins {
struct ins_operands {
char *raw;
char *raw_comment;
struct {
char *raw;
char *name;

View File

@ -251,8 +251,9 @@ struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
{
struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
if (evsel != NULL)
perf_evsel__init(evsel, attr, idx);
if (!evsel)
return NULL;
perf_evsel__init(evsel, attr, idx);
if (perf_evsel__is_bpf_output(evsel)) {
evsel->attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |

View File

@ -576,6 +576,13 @@ struct symbol *map_groups__find_symbol(struct map_groups *mg,
return NULL;
}
static bool map__contains_symbol(struct map *map, struct symbol *sym)
{
u64 ip = map->unmap_ip(map, sym->start);
return ip >= map->start && ip < map->end;
}
struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
struct map **mapp)
{
@ -591,6 +598,10 @@ struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
if (sym == NULL)
continue;
if (!map__contains_symbol(pos, sym)) {
sym = NULL;
continue;
}
if (mapp != NULL)
*mapp = pos;
goto out;

View File

@ -377,7 +377,7 @@ out:
static int record_saved_cmdline(void)
{
unsigned int size;
unsigned long long size;
char *path;
struct stat st;
int ret, err = 0;

View File

@ -164,16 +164,15 @@ void parse_ftrace_printk(struct tep_handle *pevent,
void parse_saved_cmdline(struct tep_handle *pevent,
char *file, unsigned int size __maybe_unused)
{
char *comm;
char comm[17]; /* Max comm length in the kernel is 16. */
char *line;
char *next = NULL;
int pid;
line = strtok_r(file, "\n", &next);
while (line) {
sscanf(line, "%d %ms", &pid, &comm);
tep_register_comm(pevent, comm, pid);
free(comm);
if (sscanf(line, "%d %16s", &pid, comm) == 2)
tep_register_comm(pevent, comm, pid);
line = strtok_r(NULL, "\n", &next);
}
}