mirror of
git://sourceware.org/git/valgrind.git
synced 2026-01-12 00:19:31 +08:00
629 lines
26 KiB
C
629 lines
26 KiB
C
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/*--------------------------------------------------------------------*/
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/*--- Assertions and panics. m_libcassert.c ---*/
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/*--------------------------------------------------------------------*/
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/*
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This file is part of Valgrind, a dynamic binary instrumentation
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framework.
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Copyright (C) 2000-2017 Julian Seward
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jseward@acm.org
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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The GNU General Public License is contained in the file COPYING.
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*/
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#include "pub_core_basics.h"
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#include "pub_core_debuglog.h"
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#include "pub_core_vki.h"
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#include "pub_core_vkiscnums.h"
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#include "pub_core_threadstate.h"
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#include "pub_core_gdbserver.h"
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#include "pub_core_aspacemgr.h"
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#include "pub_core_libcbase.h"
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#include "pub_core_libcassert.h"
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#include "pub_core_libcprint.h"
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#include "pub_core_libcproc.h" // For VG_(gettid)()
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#include "pub_core_machine.h"
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#include "pub_core_stacks.h"
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#include "pub_core_stacktrace.h"
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#include "pub_core_syscall.h"
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#include "pub_core_syswrap.h"
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#include "pub_core_tooliface.h" // For VG_(details).{name,bug_reports_to}
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#include "pub_core_options.h" // For VG_(clo_xml)
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/* ---------------------------------------------------------------------
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Assertery.
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------------------------------------------------------------------ */
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#if defined(VGP_x86_linux) || defined(VGP_x86_darwin) \
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|| defined(VGP_x86_solaris) || defined(VGP_x86_freebsd)
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# define GET_STARTREGS(srP) \
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{ UInt eip, esp, ebp; \
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__asm__ __volatile__( \
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"call 0f;" \
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"0: popl %0;" \
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"movl %%esp, %1;" \
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"movl %%ebp, %2;" \
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: "=r" (eip), "=r" (esp), "=r" (ebp) \
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: /* reads none */ \
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: "memory" \
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); \
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(srP)->r_pc = (ULong)eip; \
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(srP)->r_sp = (ULong)esp; \
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(srP)->misc.X86.r_ebp = ebp; \
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}
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#elif defined(VGP_amd64_linux) || defined(VGP_amd64_darwin) \
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|| defined(VGP_amd64_solaris) || defined(VGP_amd64_freebsd)
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# define GET_STARTREGS(srP) \
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{ ULong rip, rsp, rbp; \
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__asm__ __volatile__( \
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"leaq 0(%%rip), %0;" \
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"movq %%rsp, %1;" \
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"movq %%rbp, %2;" \
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: "=r" (rip), "=r" (rsp), "=r" (rbp) \
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: /* reads none */ \
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: "memory" \
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); \
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(srP)->r_pc = rip; \
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(srP)->r_sp = rsp; \
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(srP)->misc.AMD64.r_rbp = rbp; \
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}
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#elif defined(VGP_ppc32_linux)
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# define GET_STARTREGS(srP) \
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{ UInt cia, r1, lr; \
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__asm__ __volatile__( \
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"mflr 0;" /* r0 = lr */ \
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"bl 0f;" /* lr = pc */ \
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"0:\n" \
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"mflr %0;" /* %0 = pc */ \
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"mtlr 0;" /* restore lr */ \
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"mr %1,1;" /* %1 = r1 */ \
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"mr %2,0;" /* %2 = lr */ \
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: "=r" (cia), "=r" (r1), "=r" (lr) \
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: /* reads none */ \
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: "r0" /* trashed */ \
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); \
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(srP)->r_pc = (ULong)cia; \
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(srP)->r_sp = (ULong)r1; \
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(srP)->misc.PPC32.r_lr = lr; \
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}
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#elif defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux)
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# define GET_STARTREGS(srP) \
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{ ULong cia, r1, lr; \
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__asm__ __volatile__( \
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"mflr 0;" /* r0 = lr */ \
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"bl 0f;" /* lr = pc */ \
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"0:\n" \
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"mflr %0;" /* %0 = pc */ \
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"mtlr 0;" /* restore lr */ \
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"mr %1,1;" /* %1 = r1 */ \
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"mr %2,0;" /* %2 = lr */ \
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: "=r" (cia), "=r" (r1), "=r" (lr) \
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: /* reads none */ \
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: "r0" /* trashed */ \
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); \
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(srP)->r_pc = cia; \
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(srP)->r_sp = r1; \
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(srP)->misc.PPC64.r_lr = lr; \
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}
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#elif defined(VGP_arm_linux)
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# define GET_STARTREGS(srP) \
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{ UInt block[6]; \
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__asm__ __volatile__( \
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"str r15, [%0, #+0];" \
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"str r14, [%0, #+4];" \
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"str r13, [%0, #+8];" \
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"str r12, [%0, #+12];" \
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"str r11, [%0, #+16];" \
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"str r7, [%0, #+20];" \
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: /* out */ \
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: /* in */ "r"(&block[0]) \
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: /* trash */ "memory" \
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); \
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(srP)->r_pc = block[0] - 8; \
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(srP)->misc.ARM.r14 = block[1]; \
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(srP)->r_sp = block[2]; \
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(srP)->misc.ARM.r12 = block[3]; \
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(srP)->misc.ARM.r11 = block[4]; \
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(srP)->misc.ARM.r7 = block[5]; \
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}
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#elif defined(VGP_arm64_linux) || defined(VGP_arm64_freebsd)
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# define GET_STARTREGS(srP) \
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{ ULong block[4]; \
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__asm__ __volatile__( \
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"adr x19, 0;" \
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"str x19, [%0, #+0];" /* pc */ \
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"mov x19, sp;" \
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"str x19, [%0, #+8];" /* sp */ \
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"str x29, [%0, #+16];" /* fp */ \
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"str x30, [%0, #+24];" /* lr */ \
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: /* out */ \
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: /* in */ "r"(&block[0]) \
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: /* trash */ "memory","x19" \
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); \
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(srP)->r_pc = block[0]; \
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(srP)->r_sp = block[1]; \
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(srP)->misc.ARM64.x29 = block[2]; \
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(srP)->misc.ARM64.x30 = block[3]; \
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}
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#elif defined(VGP_s390x_linux)
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# define GET_STARTREGS(srP) \
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{ ULong ia; \
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ULong block[11]; \
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__asm__ __volatile__( \
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"bras %0, 0f;" \
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"0: " \
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"stg %%r15, 0(%1);" \
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"stg %%r11, 8(%1);" \
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"stg %%r14, 16(%1);" \
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"std %%f0, 24(%1);" \
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"std %%f1, 32(%1);" \
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"std %%f2, 40(%1);" \
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"std %%f3, 48(%1);" \
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"std %%f4, 56(%1);" \
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"std %%f5, 64(%1);" \
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"std %%f6, 72(%1);" \
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"std %%f7, 80(%1);" \
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: /* out */ "=&r" (ia) \
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: /* in */ "a" (&block[0]) \
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: /* trash */ "memory" \
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); \
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(srP)->r_pc = ia; \
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(srP)->r_sp = block[0]; \
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(srP)->misc.S390X.r_fp = block[1]; \
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(srP)->misc.S390X.r_lr = block[2]; \
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(srP)->misc.S390X.r_f0 = block[3]; \
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(srP)->misc.S390X.r_f1 = block[4]; \
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(srP)->misc.S390X.r_f2 = block[5]; \
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(srP)->misc.S390X.r_f3 = block[6]; \
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(srP)->misc.S390X.r_f4 = block[7]; \
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(srP)->misc.S390X.r_f5 = block[8]; \
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(srP)->misc.S390X.r_f6 = block[9]; \
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(srP)->misc.S390X.r_f7 = block[10]; \
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}
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#elif defined(VGP_mips32_linux)
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# define GET_STARTREGS(srP) \
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{ UInt pc, sp, fp, ra, gp; \
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asm("move $8, $31;" /* t0 = ra */ \
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"bal 0f;" /* ra = pc */ \
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"0:\n" \
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"move %0, $31;" \
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"move $31, $8;" /* restore lr */ \
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"move %1, $29;" \
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"move %2, $30;" \
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"move %3, $31;" \
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"move %4, $28;" \
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: "=r" (pc), \
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"=r" (sp), \
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"=r" (fp), \
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"=r" (ra), \
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"=r" (gp) \
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: /* reads none */ \
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: "$8" /* trashed */ ); \
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(srP)->r_pc = (ULong)pc - 8; \
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(srP)->r_sp = (ULong)sp; \
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(srP)->misc.MIPS32.r30 = (ULong)fp; \
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(srP)->misc.MIPS32.r31 = (ULong)ra; \
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(srP)->misc.MIPS32.r28 = (ULong)gp; \
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}
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#elif defined(VGP_mips64_linux)
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# define GET_STARTREGS(srP) \
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{ ULong pc, sp, fp, ra, gp; \
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asm("move $8, $31;" /* t0 = ra */ \
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"bal 0f;" /* ra = pc */ \
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"0:\n" \
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"move %0, $31;" \
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"move $31, $8;" /* restore lr */ \
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"move %1, $29;" \
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"move %2, $30;" \
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"move %3, $31;" \
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"move %4, $28;" \
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: "=r" (pc), \
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"=r" (sp), \
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"=r" (fp), \
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"=r" (ra), \
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"=r" (gp) \
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: /* reads none */ \
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: "$8" /* trashed */ ); \
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(srP)->r_pc = (ULong)pc - 8; \
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(srP)->r_sp = (ULong)sp; \
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(srP)->misc.MIPS64.r30 = (ULong)fp; \
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(srP)->misc.MIPS64.r31 = (ULong)ra; \
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(srP)->misc.MIPS64.r28 = (ULong)gp; \
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}
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#elif defined(VGP_nanomips_linux)
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# define GET_STARTREGS(srP) \
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{ UInt pc=0, sp=0, fp=0, ra=0, gp=0; \
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asm("addiupc[32] %0, -4 \n\t" \
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"move %1, $sp \n\t" \
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"move %2, $fp \n\t" \
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"move %3, $ra \n\t" \
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"move %4, $gp \n\t" \
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: "=r" (pc), \
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"=r" (sp), \
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"=r" (fp), \
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"=r" (ra), \
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"=r" (gp) \
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); \
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(srP)->r_pc = (UInt)pc; \
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(srP)->r_sp = (UInt)sp; \
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(srP)->misc.MIPS32.r30 = (UInt)fp; \
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(srP)->misc.MIPS32.r31 = (UInt)ra; \
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(srP)->misc.MIPS32.r28 = (UInt)gp; \
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}
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#elif defined(VGP_riscv64_linux)
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# define GET_STARTREGS(srP) \
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{ ULong pc, sp, fp, ra; \
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__asm__ __volatile__( \
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"jal %0, 0f;" \
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"0:\n" \
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"mv %1, sp;" \
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"mv %2, fp;" \
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"mv %3, ra;" \
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: "=r" (pc), \
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"=r" (sp), \
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"=r" (fp), \
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"=r" (ra) \
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); \
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(srP)->r_pc = pc; \
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(srP)->r_sp = sp; \
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(srP)->misc.RISCV64.r_fp = fp; \
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(srP)->misc.RISCV64.r_ra = ra; \
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}
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#else
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# error Unknown platform
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#endif
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#define BACKTRACE_DEPTH 100 // nice and deep!
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__attribute__ ((__noreturn__))
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static void exit_wrk( Int status, Bool gdbserver_call_allowed)
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{
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static Bool exit_called = False;
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// avoid recursive exit during gdbserver call.
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if (gdbserver_call_allowed && !exit_called) {
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const ThreadId atid = 1; // Arbitrary tid used to call/terminate gdbsrv.
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exit_called = True;
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if (status != 0
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&& VgdbStopAtiS(VgdbStopAt_ValgrindAbExit, VG_(clo_vgdb_stop_at))) {
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if (VG_(gdbserver_init_done)()) {
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if (!(VG_(clo_launched_with_multi)))
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VG_(umsg)("(action at valgrind abnormal exit) vgdb me ... \n");
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VG_(gdbserver) (atid);
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} else {
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VG_(umsg)("(action at valgrind abnormal exit)\n"
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"valgrind exit is too early => vgdb not yet usable\n");
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}
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}
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if (VG_(gdbserver_init_done)()) {
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// Always terminate the gdbserver when Valgrind exits, so as
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// to e.g. cleanup the FIFOs.
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VG_(gdbserver_exit) (atid,
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status == 0 ? VgSrc_ExitProcess : VgSrc_FatalSig);
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}
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}
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exit_called = True;
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VG_(exit_now) (status);
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}
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/* Call the appropriate system call and nothing else. This function should
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be called in places where the dependencies of VG_(exit) need to be
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avoided. */
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__attribute__ ((__noreturn__))
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void VG_(exit_now)( Int status )
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{
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#if defined(VGO_linux)
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(void)VG_(do_syscall1)(__NR_exit_group, status );
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#elif defined(VGO_darwin) || defined(VGO_solaris) || defined(VGO_freebsd)
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(void)VG_(do_syscall1)(__NR_exit, status );
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#else
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# error Unknown OS
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#endif
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/*NOTREACHED*/
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// We really shouldn't reach here. Just in case we do, use some very crude
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// methods to force abort
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__builtin_trap();
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*(volatile Int*)0 = 'x';
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}
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/* Pull down the entire world */
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void VG_(exit)( Int status )
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{
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exit_wrk (status, True);
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}
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/* Pull down the entire world */
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void VG_(client_exit)( Int status )
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{
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exit_wrk (status, False);
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}
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static void print_thread_state (Bool stack_usage,
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const HChar* prefix, ThreadId i)
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{
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VgStack *stack
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= (VgStack*)VG_(threads)[i].os_state.valgrind_stack_base;
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HChar syscallno[50];
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// must be large enough for VG_SYSNUM_STRING result + 10.
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if (VG_(is_in_syscall) (i))
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VG_(sprintf)(syscallno, " syscall %s",
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VG_SYSNUM_STRING(VG_(is_in_syscall_no)(i)));
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else
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syscallno[0] = 0;
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VG_(printf)("\n%sThread %u: status = %s%s (lwpid %d)\n", prefix, i,
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VG_(name_of_ThreadStatus)(VG_(threads)[i].status),
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syscallno,
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VG_(threads)[i].os_state.lwpid);
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if (VG_(threads)[i].status != VgTs_Empty)
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VG_(get_and_pp_StackTrace)( i, BACKTRACE_DEPTH );
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if (stack_usage && VG_(threads)[i].client_stack_highest_byte != 0 ) {
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Addr start, end;
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|
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start = end = 0;
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VG_(stack_limits)(VG_(get_SP)(i), &start, &end);
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if (start != end)
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VG_(printf)("%sclient stack range: [%p %p] client SP: %p\n",
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prefix,
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(void*)start, (void*)end, (void*)VG_(get_SP)(i));
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|
else
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VG_(printf)("%sclient stack range: ??????? client SP: %p\n",
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prefix,
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(void*)VG_(get_SP)(i));
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}
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if (stack_usage && stack != 0) {
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Addr stack_low_addr = VG_(am_valgrind_stack_low_addr) (stack);
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VG_(printf)
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|
("%svalgrind stack range: [%p %p] top usage: %lu of %lu\n",
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|
prefix,
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|
(void*)stack_low_addr,
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|
(void*)(stack_low_addr + VG_(clo_valgrind_stacksize) - 1),
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|
VG_(clo_valgrind_stacksize)
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|
- VG_(am_get_VgStack_unused_szB) (stack,
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|
VG_(clo_valgrind_stacksize)),
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|
(SizeT) VG_(clo_valgrind_stacksize));
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|
}
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|
}
|
|
|
|
// Print the scheduler status.
|
|
static void show_sched_status_wrk ( Bool host_stacktrace,
|
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Bool stack_usage,
|
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Bool exited_threads,
|
|
const UnwindStartRegs* startRegsIN)
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|
{
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|
Int i;
|
|
if (host_stacktrace) {
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|
const Bool save_clo_xml = VG_(clo_xml);
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|
Addr stacktop;
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|
Addr ips[BACKTRACE_DEPTH];
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|
Int n_ips;
|
|
ThreadState *tst
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= VG_(get_ThreadState)( VG_(lwpid_to_vgtid_dead_ok)(VG_(gettid)()));
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|
|
|
// If necessary, fake up an ExeContext which is of our actual real CPU
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|
// state. Could cause problems if we got the panic/exception within the
|
|
// execontext/stack dump/symtab code. But it's better than nothing.
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|
UnwindStartRegs startRegs;
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VG_(memset)(&startRegs, 0, sizeof(startRegs));
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|
|
|
if (startRegsIN == NULL) {
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|
GET_STARTREGS(&startRegs);
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|
} else {
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|
startRegs = *startRegsIN;
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|
}
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stacktop = tst->os_state.valgrind_stack_init_SP;
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n_ips =
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|
VG_(get_StackTrace_wrk)(
|
|
0/*tid is unknown*/,
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|
ips, BACKTRACE_DEPTH,
|
|
NULL/*array to dump SP values in*/,
|
|
NULL/*array to dump FP values in*/,
|
|
&startRegs, stacktop
|
|
);
|
|
VG_(printf)("\nhost stacktrace:\n");
|
|
VG_(clo_xml) = False;
|
|
VG_(pp_StackTrace) (VG_(current_DiEpoch)(), ips, n_ips);
|
|
VG_(clo_xml) = save_clo_xml;
|
|
}
|
|
|
|
VG_(printf)("\nsched status:\n");
|
|
if (VG_(threads) == NULL) {
|
|
VG_(printf)(" scheduler not yet initialised\n");
|
|
} else {
|
|
VG_(printf)(" running_tid=%u\n", VG_(get_running_tid)());
|
|
for (i = 1; i < VG_N_THREADS; i++) {
|
|
VgStack *stack
|
|
= (VgStack*)VG_(threads)[i].os_state.valgrind_stack_base;
|
|
/* If a thread slot was never used (yet), valgrind_stack_base is 0.
|
|
If a thread slot is used by a thread or was used by a thread which
|
|
has exited, then valgrind_stack_base points to the stack base. */
|
|
if (VG_(threads)[i].status == VgTs_Empty
|
|
&& (!exited_threads || stack == 0)) continue;
|
|
print_thread_state(stack_usage, "", i);
|
|
if (VG_(inner_threads) != NULL) {
|
|
/* An inner V has informed us (the outer) of its thread array.
|
|
Report the inner guest stack trace. */
|
|
UInt inner_tid;
|
|
|
|
for (inner_tid = 1; inner_tid < VG_N_THREADS; inner_tid++) {
|
|
if (VG_(threads)[i].os_state.lwpid
|
|
== VG_(inner_threads)[inner_tid].os_state.lwpid) {
|
|
ThreadState* save_outer_vg_threads = VG_(threads);
|
|
|
|
VG_(threads) = VG_(inner_threads);
|
|
print_thread_state(stack_usage, "INNER ", inner_tid);
|
|
VG_(threads) = save_outer_vg_threads;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
VG_(printf)("\n");
|
|
}
|
|
|
|
void VG_(show_sched_status) ( Bool host_stacktrace,
|
|
Bool stack_usage,
|
|
Bool exited_threads)
|
|
{
|
|
show_sched_status_wrk (host_stacktrace,
|
|
stack_usage,
|
|
exited_threads,
|
|
NULL);
|
|
}
|
|
|
|
__attribute__ ((noreturn))
|
|
static void report_and_quit ( const HChar* report,
|
|
const UnwindStartRegs* startRegsIN )
|
|
{
|
|
show_sched_status_wrk (True, // host_stacktrace
|
|
True, // stack_usage
|
|
False, // exited_threads
|
|
startRegsIN);
|
|
|
|
if (VG_(debugLog_getLevel)() > 0) {
|
|
VG_(am_show_nsegments) (1, "report_and_quit");
|
|
(void) VG_(am_do_sync_check) ("report_and_quit", __FILE__, __LINE__);
|
|
}
|
|
if (VG_(clo_xml)) // After flushing outputs
|
|
VG_(printf_xml)("</valgrindoutput>\n");
|
|
|
|
VG_(printf)(
|
|
"\n"
|
|
"Note: see also the FAQ in the source distribution.\n"
|
|
"It contains workarounds to several common problems.\n"
|
|
"In particular, if Valgrind aborted or crashed after\n"
|
|
"identifying problems in your program, there's a good chance\n"
|
|
"that fixing those problems will prevent Valgrind aborting or\n"
|
|
"crashing, especially if it happened in m_mallocfree.c.\n"
|
|
"\n"
|
|
"If that doesn't help, please report this bug to: %s\n\n"
|
|
"In the bug report, send all the above text, the valgrind\n"
|
|
"version, and what OS and version you are using. Thanks.\n\n",
|
|
report);
|
|
VG_(exit)(1);
|
|
}
|
|
|
|
void VG_(assert_fail) ( Bool isCore, const HChar* expr, const HChar* file,
|
|
Int line, const HChar* fn, const HChar* format, ... )
|
|
{
|
|
va_list vargs, vargs_copy;
|
|
const HChar* component;
|
|
const HChar* bugs_to;
|
|
UInt written;
|
|
|
|
static Bool entered = False;
|
|
if (entered)
|
|
VG_(exit)(2);
|
|
entered = True;
|
|
|
|
if (isCore) {
|
|
component = "valgrind";
|
|
bugs_to = VG_BUGS_TO;
|
|
} else {
|
|
component = VG_(details).name;
|
|
bugs_to = VG_(details).bug_reports_to;
|
|
}
|
|
|
|
// Treat vg_assert2(0, "foo") specially, as a panicky abort
|
|
if (VG_STREQ(expr, "0")) {
|
|
VG_(printf)("\n%s: %s:%d (%s): the 'impossible' happened.\n",
|
|
component, file, line, fn );
|
|
} else {
|
|
VG_(printf)("\n%s: %s:%d (%s): Assertion '%s' failed.\n",
|
|
component, file, line, fn, expr );
|
|
}
|
|
|
|
/* Check whether anything will be written */
|
|
HChar buf[5];
|
|
va_start(vargs, format);
|
|
va_copy(vargs_copy, vargs);
|
|
written = VG_(vsnprintf) ( buf, sizeof(buf), format, vargs );
|
|
va_end(vargs);
|
|
|
|
if (written > 0) {
|
|
VG_(printf)("%s: ", component);
|
|
VG_(vprintf)(format, vargs_copy);
|
|
VG_(printf)("\n");
|
|
}
|
|
|
|
report_and_quit(bugs_to, NULL);
|
|
}
|
|
|
|
__attribute__ ((noreturn))
|
|
static void panic ( const HChar* name, const HChar* report, const HChar* str,
|
|
const UnwindStartRegs* startRegs )
|
|
{
|
|
VG_(printf)("\n%s: the 'impossible' happened:\n %s\n", name, str);
|
|
report_and_quit(report, startRegs);
|
|
}
|
|
|
|
void VG_(core_panic_at) ( const HChar* str, const UnwindStartRegs* startRegs )
|
|
{
|
|
panic("valgrind", VG_BUGS_TO, str, startRegs);
|
|
}
|
|
|
|
void VG_(core_panic) ( const HChar* str )
|
|
{
|
|
VG_(core_panic_at)(str, NULL);
|
|
}
|
|
|
|
void VG_(tool_panic) ( const HChar* str )
|
|
{
|
|
panic(VG_(details).name, VG_(details).bug_reports_to, str, NULL);
|
|
}
|
|
|
|
/* Print some helpful-ish text about unimplemented things, and give up. */
|
|
void VG_(unimplemented) ( const HChar* format, ... )
|
|
{
|
|
va_list vargs;
|
|
HChar msg[256];
|
|
|
|
va_start(vargs, format);
|
|
VG_(vsnprintf)(msg, sizeof(msg), format, vargs);
|
|
va_end(vargs);
|
|
|
|
if (VG_(clo_xml))
|
|
VG_(printf_xml)("</valgrindoutput>\n");
|
|
VG_(umsg)("\n");
|
|
VG_(umsg)("Valgrind detected that your program requires\n");
|
|
VG_(umsg)("the following unimplemented functionality:\n");
|
|
VG_(umsg)(" %s\n", msg);
|
|
VG_(umsg)("This may be because the functionality is hard to implement,\n");
|
|
VG_(umsg)("or because no reasonable program would behave this way,\n");
|
|
VG_(umsg)("or because nobody has yet needed it. "
|
|
"In any case, let us know at\n");
|
|
VG_(umsg)("%s and/or try to work around the problem, if you can.\n",
|
|
VG_BUGS_TO);
|
|
VG_(umsg)("\n");
|
|
VG_(umsg)("Valgrind has to exit now. Sorry. Bye!\n");
|
|
VG_(umsg)("\n");
|
|
VG_(show_sched_status)(False, // host_stacktrace
|
|
False, // stack_usage
|
|
False); // exited_threads
|
|
VG_(exit)(1);
|
|
}
|
|
|
|
/*--------------------------------------------------------------------*/
|
|
/*--- end ---*/
|
|
/*--------------------------------------------------------------------*/
|