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Sync VEX/LICENSE.GPL with top-level COPYING file. We used 3 different addresses for writing to the FSF to receive a copy of the GPL. Replace all different variants with an URL <http://www.gnu.org/licenses/>. The following files might still have some slightly different (L)GPL copyright notice because they were derived from other programs: - files under coregrind/m_demangle which come from libiberty: cplus-dem.c, d-demangle.c, demangle.h, rust-demangle.c, safe-ctype.c and safe-ctype.h - coregrind/m_demangle/dyn-string.[hc] derived from GCC. - coregrind/m_demangle/ansidecl.h derived from glibc. - VEX files for FMA detived from glibc: host_generic_maddf.h and host_generic_maddf.c - files under coregrin/m_debuginfo derived from LZO: lzoconf.h, lzodefs.h, minilzo-inl.c and minilzo.h - files under coregrind/m_gdbserver detived from GDB: gdb/signals.h, inferiors.c, regcache.c, regcache.h, regdef.h, remote-utils.c, server.c, server.h, signals.c, target.c, target.h and utils.c Plus the following test files: - none/tests/ppc32/testVMX.c derived from testVMX. - ppc tests derived from QEMU: jm-insns.c, ppc64_helpers.h and test_isa_3_0.c - tests derived from bzip2 (with embedded GPL text in code): hackedbz2.c, origin5-bz2.c, varinfo6.c - tests detived from glibc: str_tester.c, pth_atfork1.c - test detived from GCC libgomp: tc17_sembar.c - performance tests derived from bzip2 or tinycc (with embedded GPL text in code): bz2.c, test_input_for_tinycc.c and tinycc.c
134 lines
5.3 KiB
C
134 lines
5.3 KiB
C
/*--------------------------------------------------------------------*/
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/*--- ExeContexts: long-lived stack traces. pub_tool_execontext.h ---*/
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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 2 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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#ifndef __PUB_TOOL_EXECONTEXT_H
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#define __PUB_TOOL_EXECONTEXT_H
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#include "pub_tool_basics.h" // ThreadID
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#include "pub_tool_debuginfo.h" // DiEpoch
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/*====================================================================*/
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/*=== ExeContext ===*/
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/*====================================================================*/
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// It's an abstract type.
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typedef
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struct _ExeContext
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ExeContext;
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// Resolution type used to decide how closely to compare two errors for
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// equality.
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typedef
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enum { Vg_LowRes, Vg_MedRes, Vg_HighRes }
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VgRes;
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// Take a snapshot of the client's stack. Search our collection of
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// ExeContexts to see if we already have it, and if not, allocate a
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// new one. Either way, return a pointer to the context. Context size
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// controlled by --num-callers option.
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//
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// This should only be used for long-lived stack traces. If you want a
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// short-lived stack trace, use VG_(get_StackTrace)().
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//
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// If called from generated code, use VG_(get_running_tid)() to get the
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// current ThreadId. If called from non-generated code, the current
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// ThreadId should be passed in by the core. The initial IP value to
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// use is adjusted by first_ip_delta before the stack is unwound.
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// A safe value to pass is zero.
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//
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// See comments in pub_tool_stacktrace.h for precise definition of
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// the meaning of the code addresses in the returned ExeContext.
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extern
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ExeContext* VG_(record_ExeContext) ( ThreadId tid, Word first_ip_delta );
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// Trivial version of VG_(record_ExeContext), which just records the
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// thread's current program counter but does not do any stack
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// unwinding. This is useful in some rare cases when we suspect the
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// stack might be outside mapped storage, and so unwinding
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// might cause a segfault. In this case we can at least safely
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// produce a one-element stack trace, which is better than nothing.
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extern
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ExeContext* VG_(record_depth_1_ExeContext)(ThreadId tid, Word first_ip_delta);
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// Apply a function to every element in the ExeContext. The parameter 'n'
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// gives the index of the passed ip. Doesn't go below main() unless
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// --show-below-main=yes is set.
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extern void VG_(apply_ExeContext)(
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void(*action)(UInt n, DiEpoch ep, Addr ip, void* opaque),
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void* opaque, ExeContext* ec);
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// Compare two ExeContexts. Number of callers considered depends on `res':
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// Vg_LowRes: 2
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// Vg_MedRes: 4
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// Vg_HighRes: all
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extern Bool VG_(eq_ExeContext) ( VgRes res, const ExeContext* e1,
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const ExeContext* e2 );
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// Print an ExeContext.
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extern void VG_(pp_ExeContext) ( ExeContext* ec );
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// Get the 32-bit unique reference number for this ExeContext
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// (the "ExeContext Unique"). Guaranteed to be nonzero and to be a
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// multiple of four (iow, the lowest two bits are guaranteed to
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// be zero, so that callers can store other information there.
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extern UInt VG_(get_ECU_from_ExeContext)( const ExeContext* e );
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// Returns the epoch in which the ips of e can be symbolised.
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extern DiEpoch VG_(get_ExeContext_epoch)( const ExeContext* e );
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// How many entries (frames) in this ExeContext?
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extern Int VG_(get_ExeContext_n_ips)( const ExeContext* e );
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// Find the ExeContext that has the given ECU, if any.
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// NOTE: very slow. Do not call often.
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extern ExeContext* VG_(get_ExeContext_from_ECU)( UInt uniq );
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// Make an ExeContext containing just 'a', and nothing else
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ExeContext* VG_(make_depth_1_ExeContext_from_Addr)( Addr a );
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// Is this a plausible-looking ECU ? Catches some obvious stupid
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// cases, but does not guarantee that the ECU is really valid, that
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// is, has an associated ExeContext.
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static inline Bool VG_(is_plausible_ECU)( UInt ecu ) {
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return (ecu > 0) && ((ecu & 3) == 0);
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}
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// Make an ExeContext containing exactly the specified stack frames.
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ExeContext* VG_(make_ExeContext_from_StackTrace)( const Addr* ips, UInt n_ips );
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// Returns the "null" exe context. The null execontext is an artificial
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// exe context, with a stack trace made of one Addr (the NULL address).
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extern
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ExeContext* VG_(null_ExeContext) (void);
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#endif // __PUB_TOOL_EXECONTEXT_H
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/*--------------------------------------------------------------------*/
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/*--- end ---*/
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/*--------------------------------------------------------------------*/
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