Add calltrace(3) function.
This commit is contained in:
Jonas 'Sortie' Termansen
parent
133e5d4410
commit
f6371bfcec
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@ -121,11 +121,13 @@ wctype.o \
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HOSTEDOBJS=\
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access.o \
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calltrace.o \
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chdir.o \
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chmod.o \
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chown.o \
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clock.o \
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close.o \
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$(CPUDIR)/calltrace.o \
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$(CPUDIR)/fork.o \
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$(CPUDIR)/signal.o \
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$(CPUDIR)/syscall.o \
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@ -0,0 +1,43 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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calltrace.cpp
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Traverses the stack and prints the callstack.
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*******************************************************************************/
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#include <calltrace.h>
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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extern "C" void asm_calltrace();
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extern "C" void calltrace_print_function(size_t index, unsigned long ip)
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{
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fprintf(stdout, "[pid=%i %s] %zu: 0x%lx\n", getpid(),
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program_invocation_short_name, index, ip);
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}
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extern "C" void calltrace()
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{
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fprintf(stdout, "[pid=%i %s] Calltrace: (%s)\n", getpid(),
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program_invocation_short_name, program_invocation_name);
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asm_calltrace();
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}
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@ -0,0 +1,36 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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calltrace.h
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Traverses the stack and prints the callstack.
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*******************************************************************************/
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#ifndef _CALLTRACE_H
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#define _CALLTRACE_H 1
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#include <features.h>
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__BEGIN_DECLS
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void calltrace();
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__END_DECLS
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#endif
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@ -0,0 +1,53 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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x64/calltrace.s
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Attempts to unwind the stack and prints the code locations where functions
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were called. This greatly aids debugging.
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*******************************************************************************/
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.global asm_calltrace
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.type asm_calltrace, @function
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asm_calltrace:
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push %rbp
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mov %rsp, %rbp
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push %rbx
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push %r12
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xor %r12, %r12
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mov %rbp, %rbx
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.Lasm_calltrace_unwind:
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test %rbx, %rbx
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jz .Lasm_calltrace_done
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mov 8(%rbx), %rsi # Previous RIP
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mov 0(%rbx), %rbx # Previous RBP
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test %rsi, %rsi
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jz .Lasm_calltrace_done
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mov %r12, %rdi
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call calltrace_print_function
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inc %r12
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jmp .Lasm_calltrace_unwind
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.Lasm_calltrace_done:
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pop %r12
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pop %rbx
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pop %rbp
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ret
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.size asm_calltrace, . - asm_calltrace
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@ -0,0 +1,55 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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x86/calltrace.s
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Attempts to unwind the stack and prints the code locations where functions
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were called. This greatly aids debugging.
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*******************************************************************************/
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.global asm_calltrace
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.type asm_calltrace, @function
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asm_calltrace:
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push %ebp
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mov %esp, %ebp
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push %ebx
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push %esi
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xor %esi, %esi
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mov %ebp, %ebx
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.Lasm_calltrace_unwind:
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test %ebx, %ebx
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jz .Lasm_calltrace_done
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mov 4(%ebx), %ecx # Previous EIP
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mov 0(%ebx), %ebx # Previous EBP
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test %ecx, %ecx
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jz .Lasm_calltrace_done
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push %ecx
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push %esi
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call calltrace_print_function
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add $8, %esp
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inc %esi
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jmp .Lasm_calltrace_unwind
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.Lasm_calltrace_done:
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pop %esi
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pop %ebx
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pop %ebp
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ret
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.size asm_calltrace, . - asm_calltrace
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