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In programming, detecting whether a variable is within given bounds before use
In computer programming, bounds checking is any method of detecting whether a variable is within some bounds before it is used. It is usually used to
Bounds_checking
Compiler optimization
science, bounds-checking elimination is a compiler optimization useful in programming languages or runtime systems that enforce bounds checking, the practice
Bounds-checking_elimination
Software bug
are designed to exploit a lack of bounds checking to read inaccessible parts of memory. At other times, out-of-bounds reads can result in other erratic
Out-of-bounds_read
Software security techniques
over it. Other buffer overflow protection techniques include bounds checking, which checks accesses to each allocated block of memory so they cannot go
Buffer_overflow_protection
Processor security vulnerability
Vulnerabilities and Exposures records related to Spectre, CVE-2017-5753 (bounds check bypass, Spectre-V1, Spectre 1.0) and CVE-2017-5715 (branch target injection
Spectre (security vulnerability)
Spectre_(security_vulnerability)
Anomaly in computer security and programming
buffer due to insufficient bounds checking. This can occur when copying data from one buffer to another without first checking that the data fits within
Buffer_overflow
Data type that represents an ordered collection of elements (values or variables)
analysis Array database management system Bounds-checking elimination Delimiter-separated values Index checking Parallel array Sparse array Variable-length
Array_(data_type)
General-purpose programming language
run-time checks, there is a burden on the programmer to consider all possible outcomes, to protect against buffer overruns, array bounds checking, stack
C_(programming_language)
C programming language standard, 2011 revision
previous C language standard revision, ISO/IEC 9899:1999/Cor.3:2007(E). Bounds-checking interfaces (Annex K). Analyzability features (Annex L). More macros
C11_(C_standard_revision)
Standard library for the C programming language
by introducing auxiliary code to perform memory management, bounds checking, input checking, etc. This is often done in the form of wrappers that make
C_standard_library
Compiler that optimizes generated code
can be evaluated at compile time. Bounds-checking elimination Many languages, such as Java, enforce bounds checking of all array accesses. This is a severe
Optimizing_compiler
State of being protected from memory access bugs
pointers implemented as direct memory addresses with no provision for bounds checking, making them memory-unsafe. Memory-unsafe code is typically found in
Memory_safety
Aspect of the instruction set architecture of CPUs
easy to implement dynamically allocated arrays and still have full bounds checking. Some computers had special indirect addressing modes for subfields
Addressing_mode
Commercial product for developing code
C" functions. It is specified in ISO/IEC TR 24731-1 and known as "Bounds-checking interfaces (Annex K)" in C11. Some function name examples are strcpy_s()
Watcom_C/C++
Comparison between two programming languages
a bounds check unneeded and eliminate it. C++ has no required behavior for out-of-bounds access of native arrays, thus requiring no bounds checking for
Comparison_of_Java_and_C++
Performing the actions encoded in a computer program
efficient or accurate when performed) at runtime. Logic errors and array bounds checking are examples. For this reason, some programming bugs are not discovered
Execution_(computing)
GNU implementation of the standard C library
handhelds (when using the GPE display software). glibc does not implement bounds-checking interfaces defined in C11 and did not implement strlcpy and strlcat
Glibc
Access to a program's runtime environment
the runtime library API, e.g. some logic errors, array bounds checking, dynamic type checking, exception handling, and possibly debugging functionality
Runtime_library
Version history of the Linux kernel
Retrieved 11 July 2022. Corbet, Jonathan (30 July 2021). "Strict memcpy() bounds checking for the kernel [LWN.net]". LWN.net. Retrieved 11 July 2022. Corbet
Linux_kernel_version_history
Software that manages computer hardware resources
caused by buffer overflow attacks, which are enabled by the lack of bounds checking. Hardware vulnerabilities, some of them caused by CPU optimizations
Operating_system
Software anomaly
<string.h> void foo(char* bar) { char c[12]; strcpy(c, bar); // no bounds checking } int main(int argc, char* argv[]) { foo(argv[1]); return 0; } This
Stack_buffer_overflow
General-purpose programming language
default features for greater program safety. It employs bounds checking, to guard against out of bounds use of variables. Option/result types are used, where
V_(programming_language)
Object which stores memory addresses in a computer program
integer. Other measures may also be taken (such as validation and bounds checking), to verify that the pointer variable contains a value that is both
Pointer (computer programming)
Pointer_(computer_programming)
Security bug in OpenSSL
client. It resulted from improper input validation (due to a missing bounds check) in the implementation of the TLS heartbeat extension. Thus, the bug's
Heartbleed
Handling of strings in the C programming language
2012. Retrieved 10 November 2011. "Field Experience With Annex K — Bounds Checking Interfaces". Retrieved 5 November 2015. "MSC06-C. Beware of compiler
C_string_handling
will not have runtime bounds checking exceptions. Some programming languages, such as Rust, accomplish this using borrow checking. The borrow checker acts
Language-Theoretic_Security
Group of class templates in the C++ Standard Library
Accesses specified element with bounds checking. —N/a operator[] —N/a —N/a Accesses specified element without bounds checking. Iterators begin begin begin
Unordered associative containers (C++)
Unordered_associative_containers_(C++)
Comprehensive analysis of software source code
common high-risk vulnerabilities may exist due to the use of: Non-bounds-checking functions (e.g., strcpy, sprintf, vsprintf, and sscanf) that could
Code_audit
Computer science concept
parts of a computer program, and then checking that the parts have been connected in a consistent way. This checking can happen statically (at compile time)
Type_system
Topics referred to by the same term
Out of Bounds (Rajaton album), a 2006 music album of the Finnish ensemble Rajaton Out-of-bounds, in computer programming; see Bounds checking Out-of-band
Out of bounds (disambiguation)
Out_of_bounds_(disambiguation)
Static code analysis tool
checks that are rigorous, rather than heuristic in nature. Some of the checks that are supported include: Automatic variable checking Bounds checking
Cppcheck
Hardware that translates virtual addresses to physical addresses
limit is set by the 16-bit PC and SP registers; the processor does no bounds checking). Offset+address exceeding 0xFFFFF wraps around to 0x00000. Each 64 KiB
Memory_management_unit
Term used in computer programming
Stop when a match is detected. This algorithm has a bug, namely a bounds checking error: if no elephants are found, the programmer will continue northwards
Elephant_in_Cairo
Computer architecture where code and data share a common bus
However, this problem also applies to conventional programs that lack bounds checking. Memory protection and various access controls generally safeguard
Von_Neumann_architecture
compiler to generate code that performs bounds checking, i.e. that tests if a pointer's value lies within the bounds prior to dereferencing the pointer or
Bounded_pointer
Computer vulnerability using speculative execution
recommend setting SSBD for OSes, VMMs ... "INTEL-SA-00145". Intel. "Bounds Check Bypass Store (BCBS) Vulnerability (INTEL-OSS-10002)". Intel. "Spectre
Transient execution CPU vulnerability
Transient_execution_CPU_vulnerability
Computer optimization technique
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Speculative_execution
Class templates in the C++ programming language
(place element into the map), erase() (remove element from the map), find() (check presence of the element in the container), etc. When program is executed
Associative_containers_(C++)
Type of data structure
B5000 and its successors, used memory segmentation to perform index-bounds checking in hardware. Assembly languages generally have no special support for
Array_(data_structure)
General-purpose programming language
support for software engineering principles such as strong type checking, array bounds checking, detection of attempts to use uninitialized variables, and
C Sharp (programming language)
C_Sharp_(programming_language)
Microprocessor security vulnerability
privilege checking. Put briefly, the instruction execution leaves side effects that constitute information not hidden to the process by the privilege check. The
Meltdown (security vulnerability)
Meltdown_(security_vulnerability)
Computer security vulnerability
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Downfall (security vulnerability)
Downfall_(security_vulnerability)
Inherent flaw in computer instructions
bugs. For example, many languages include runtime bounds checking and a way to recover from out-of-bounds errors instead of crashing. Style guidelines and
Software_bug
List of programming language comparisons
all Fortran implementations offer bounds checking options via compiler switches. However by default, bounds checking is usually turned off for efficiency
Comparison of programming languages (array)
Comparison_of_programming_languages_(array)
Data type simulating a pointer with additional features
while providing added features, such as automatic memory management or bounds checking. Such features are intended to reduce bugs caused by the misuse of
Smart_pointer
Programming language
safety checks that burden the performance of dynamically typed languages, while still guaranteeing runtime safety, except when array bounds checking is turned
OCaml
Memory-safe dialect of the C programming language
Never-NULL pointers do not require NULL checks "Fat" pointers support pointer arithmetic with run-time bounds checking Growable regions support a form of safe
Cyclone (programming language)
Cyclone_(programming_language)
Sequence of characters, data type
manipulated. In such cases, program code accessing the string data requires bounds checking to ensure that it does not inadvertently access or change data outside
String_(computer_science)
Computer security exploit technique
overrun. In a buffer overrun, a function that does not perform proper bounds checking before storing user-provided data into memory will accept more input
Return-oriented_programming
Custom of verifying parish boundaries
testifying to their role in the beating of the bounds. The ceremony had an important practical purpose. Checking the boundaries was a way of preventing encroachment
Beating_the_bounds
Set of extensions to the x86 instruction set architecture
MPX Explained: An Empirical Study of Intel MPX and Software-based Bounds Checking Approaches". arXiv:1702.00719 [cs.CR]. "Intel Software Development
Intel_MPX
Group of standard library class templates
Accesses specified element with bounds checking. operator[] operator[] operator[] Accesses specified element without bounds checking. front front front front
Sequence_container_(C++)
Processor security vulnerability
even if that path was not ultimately taken. Pacman tricks the CPU into checking the validity of a guessed PAC signature within a mispredicted branch so
Pacman (security vulnerability)
Pacman_(security_vulnerability)
Computer security vulnerability utilizing branch prediction
which fix the vulnerability. For Linux distributions, it is advised to check whether there are SWAPGS-specific patches that need to be applied. The kernel
SWAPGS (security vulnerability)
SWAPGS_(security_vulnerability)
Array that replaces runtime computation with a simpler array indexing operation
language, table lookups can be even more expensive due to mandatory bounds-checking involving an additional comparison and branch for each lookup. There
Lookup_table
Multi-paradigm system programming language
overloading, etc. The full module system Array slicing, and array bounds checking RAII scope(exit) Memory safety protections Interfacing with C++ COM
D_(programming_language)
Form of text that defines C code
elements minus 1. As the standard does not provide for array indexing bounds checking, specifying an index that is out of range, results in undefined behavior
C_syntax
Fatal system error screen
02: Non-Maskable Interrupt 03: Shutdown Error 04: Overflow Trap 05: Bounds Check Fault 06: Invalid Opcode Fault 07: "Coprocessor Not Available" Fault
Blue_screen_of_death
C programming language standard, 1999 revision
data types (Unicode support), and library functions with improved bounds checking. Work continues on technical reports addressing decimal floating point
C99
CPU vulnerabilities
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Microarchitectural Data Sampling
Microarchitectural_Data_Sampling
Intel processor security vulnerability
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Lazy_FP_state_restore
Division of computer's primary memory into separately relocatable segments or sections
limit is set by the 16-bit PC and SP registers; the processor does no bounds checking). Offset+address exceeding 0xFFFFF wraps around to 0x00000. Each 64 KiB
Memory_segmentation
Security for the Java platform and its applications
It also allows the JVM to enforce runtime constraints such as array bounds checking. This means that Java programs are significantly less likely to suffer
Security of the Java software platform
Security_of_the_Java_software_platform
Security vulnerability on CPUs that use speculative execution
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Spoiler (security vulnerability)
Spoiler_(security_vulnerability)
State of qualitative or quantitative pieces of information
developing protocols for research methods, reducing measurement error, bounds checking of data, cross tabulation, modeling and outlier detection, verifying
Data_quality
Hardware bug
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Hardware_security_bug
Hardware vulnerability for Intel processors
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Foreshadow
Processor security vulnerability
Public vulnerability name CVSS v2.0 CVSS v3.0 Spectre 2017-5753 Variant 1 Bounds Check Bypass (BCB) 4.7 5.6 Spectre 2017-5715 Variant 2 Branch Target Injection
Speculative_Store_Bypass
Speculative execution attack on x86–64 processors
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Retbleed
General-purpose programming language
checked at runtime by default. The performance impact of array indexing bounds checks varies, but can be significant in some cases. Many of Rust's features
Rust_(programming_language)
Internet Protocol Suite service
source of a byte-stream for debugging TCP network code for proper bounds checking and buffer management. It may also be a source of generic payload for
Character_Generator_Protocol
Software development company
fast-growing programming language C++. Work in Ada-specific areas, such as bounds-checking elimination, was done to get optimal run-time performance. The Ada
DDC-I
Comparison of two programming languages
allocated array, as no checks are built in into the language. In Pascal, arrays are a distinct type from pointers. This makes bounds checking for arrays possible
Comparison_of_Pascal_and_C
US military computer program
supported by the Digital DATCOM while providing real-time input error and bounds checking. An alpha version of the program was released November 1, 2009 to the
United States Air Force Stability and Control Digital DATCOM
United_States_Air_Force_Stability_and_Control_Digital_DATCOM
Microprocessor security vulnerability
Speculative execution security vulnerabilities Variants Bounds Check Bypass (Spectre, Variant 1) Bounds Check Bypass Store (Spectre-NG) Branch Target Injection
Load_value_injection
Hardware or software fault
cost of additional overhead. Some programming languages use software bounds checking to prevent these occurrences. Some program debugging software will
Storage_violation
Descriptors have automatic run time bounds checking on dynamically allocated arrays. Indexing a descriptor out of bounds or indexing a NULL descriptor will
Protel
n is larger than the length of the string, Java will throw an IndexOutOfBoundsException if n is larger than length of string, raises Invalid_argument if
Comparison of programming languages (string functions)
Comparison_of_programming_languages_(string_functions)
Memory debugger
BoundsChecker is a memory checking and API call validation tool used for C++ software development with Microsoft Visual C++. It was created by NuMega in
BoundsChecker
American serial killer (1971–1999)
Dallen Forrest Bounds (August 9, 1971 – December 23, 1999) was an American serial killer who killed four people in Greenville and Easley, South Carolina
Dallen_Bounds
Family of RISC-based computer architectures
include automatic null pointer checks on every load and store instruction, an instruction to perform an array bounds check, and special instructions that
ARM_architecture_family
Mathematical problem in operations research
In operations research, the cutting-stock problem is the problem of cutting standard-sized pieces of stock material, such as paper rolls or sheet metal
Cutting_stock_problem
Multinational software company
and Symantec Scan Engine (SSE) before 5.2.8 does not properly perform bounds checks of the contents of CAB archives, which allows remote attackers to cause
Gen_Digital
terminate a program when discovering bounds violations. A downside of using run-time checks such as in bounds checking is that they impose considerable performance
Language-based_security
Topics referred to by the same term
Blue Shield Association Bishop Cotton Boys' School, in Bangalore, India Bounds Check Bypass Store, a Spectre-NG class security vulnerability This disambiguation
BCBS
Extended static checking (ESC) is a collective name in computer science for a range of techniques for statically checking the correctness of various program
Extended_static_checking
Estimate of number of possible chess games
includes some illegal positions (e.g., pawns on the first rank, both kings in check) and excludes legal positions following captures and promotions. After each
Shannon_number
List of x86 microprocessor instructions
this instruction. On Intel 80186/80188 and NEC V-series processors, bounds-check failure will cause #BR to be issued as a trap-type exception (the value
List_of_x86_instructions
Statistical distribution for dependence between random variables
1 ] d {\displaystyle (u_{1},\dots ,u_{d})\in [0,1]^{d}} the following bounds hold: W ( u 1 , … , u d ) ≤ C ( u 1 , … , u d ) ≤ M ( u 1 , … , u d ) .
Copula_(statistics)
interfaces - Extensions to the C library ISO/IEC TR 24731-1:2007 Part 1: Bounds-checking interfaces ISO/IEC TR 24731-2:2010 Part 2: Dynamic Allocation Functions
List of ISO standards 24000–25999
List_of_ISO_standards_24000–25999
Computer feature
Systems Reference Manual (PDF). Burroughs Corporation. August 1979. 5010796. Retrieved September 21, 2025. "Bounds checking in C". Unisys. "Pbits". Unisys.
Burroughs large systems descriptors
Burroughs_large_systems_descriptors
Venezuelan computer scientist
computational complexity theory and its application to cryptography and program checking". Blum was born to a Jewish family in Venezuela. Blum was educated at MIT
Manuel_Blum
American right-wing news and opinion website
subsidiary fact-checking website called Check Your Fact. In 2018, the site was approved by Poynter Institute's International Fact-Checking Network (IFCN)
The_Daily_Caller
British singer-songwriter and record producer (born 1997)
Retrieved 16 January 2025. Trust, Gary (9 January 2023). "SZA's 'Kill Bill' Bounds to No. 1 on Billboard Global 200 Chart". Billboard. Archived from the original
Raye
Method of teaching foreign languages
considered "out-of-bounds". Teachers must be on constant alert to keep their language in bounds. If a teacher does say something out-of-bounds, then the solution
TPR_Storytelling
Problem in computational complexity theory
Ω ( n ⌈ k / 2 ⌉ ) {\displaystyle \Omega (n^{\lceil k/2\rceil })} lower bounds are known in some specialized models of computation (Erickson 1999). It
3SUM
Concept in theoretical computer science
Σ(n) has not yet been determined for any instance of n > 5, although lower bounds have been established (see the Known values section below). A variant of
Busy_beaver
Programming tool for profiling, memory debugging and memory leak detection
some checking on file descriptors (for instance to prevent the test executable from affecting Valgrind's log file or other output files). Checking can
Valgrind
Software verification method
of the application. Development testing Software testing Memory debugger BoundsChecker Runtime verification Runtime Error Detection by Parasoft MUST: A
Runtime_error_detection
Optimization by removing non-optimal solutions to subproblems
efficient estimation of the lower and upper bounds of regions/branches of the search space. If no bounds are available, then the algorithm degenerates
Branch_and_bound
BOUNDS CHECKING
BOUNDS CHECKING
Male
German
Variant form of German Bruno, BRUNS means "brown."
Surname or Lastname
English
English : variant spelling of Bond.Scandinavian : status name for a farmer, from Old Norse bóndi ‘farmer’. Compare Bond. In Sweden Bonde is both a personal name and the name of an old aristocratic family.Norwegian : habitational name from a farmstead named Bonde, from Old Norse bóndi ‘farmer’ + vin ‘meadow’.
Surname or Lastname
English
English : variant of Bond
Surname or Lastname
English
English : variant spelling of Folds.
Surname or Lastname
English
English : variant of Bond.
Surname or Lastname
English
English : variant of Pound.
Surname or Lastname
English
English : unexplained.
Surname or Lastname
English
English : probably a variant spelling of Bounds.
Surname or Lastname
English
English : patronymic from Round.
Girl/Female
Indian
God name
Boy/Male
English
Man of the Land
Surname or Lastname
English
English : patronymic from Bond.
Boy/Male
Muslim
Small rock
Surname or Lastname
English
English : status name for a peasant farmer or husbandman, Middle English bonde (Old English bonda, bunda, reinforced by Old Norse bóndi). The Old Norse word was also in use as a personal name, and this has given rise to other English and Scandinavian surnames alongside those originating as status names. The status of the peasant farmer fluctuated considerably during the Middle Ages; moreover, the underlying Germanic word is of disputed origin and meaning. Among Germanic peoples who settled to an agricultural life, the term came to signify a farmer holding lands from, and bound by loyalty to, a lord; from this developed the sense of a free landholder as opposed to a serf. In England after the Norman Conquest the word sank in status and became associated with the notion of bound servitude.Swedish : variant of Bonde.
Surname or Lastname
English
English : variant of Bond.
Surname or Lastname
English
English : variant spelling of Lowndes.English : Lound in Lincolnshire, Nottinghamshire, and Suffolk; Lund in North Yorkshire and the East Riding; Lunt in Merseyside.
Surname or Lastname
English (chiefly West Midlands)
English (chiefly West Midlands) : nickname for a plump person, from Middle English, Old French rond, rund ‘fat’, ‘round’ (Latin rotundus).
Surname or Lastname
English
English : patronymic from Bond.
Surname or Lastname
English
English : variant of Boone. In England this form of the name is found chiefly in South Yorkshire and the Midlands.
Surname or Lastname
English
English : unexplained. There are four farms so named in Warwickshire, one in Oxfordshire, and one in Worcestershire, and the surname is most probably derived from one of these.
BOUNDS CHECKING
BOUNDS CHECKING
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
Lord Vishnu
Male
Ukrainian
, farmer.
Boy/Male
Hindu, Indian, Telugu
Sweet
Girl/Female
Biblical
House of health.
Girl/Female
American, Australian, British, Christian, Czechoslovakian, Danish, Dutch, English, Finnish, French, German, Greek, Indian, Italian, Japanese, Latin, Lebanese, Portuguese, Romanian, Shakespearean, Slavic, Swedish, Swiss, Tamil, Ukrainian
Sea Maiden; From the God Mars; Star of the Sea
Girl/Female
Italian American Swedish Hebrew
Woman of God. An Italian form of the Hebrew name Gabriel.
Boy/Male
Hindu, Indian, Marathi
Undivided; Singleness; Unique; No One Like Him; Lord Krishna
Surname or Lastname
English
English : nickname for a person with red hair or a ruddy complexion, from Middle English rudde, Old English rud ‘red’, ‘ruddy’.Americanized shortened form of any of various Jewish surnames beginning with Rud-.
Boy/Male
French
Crown. French form of Stephen.
Boy/Male
Shakespearean
King Richard III' Christopher Urswick, a priest. 'The Taming of the Shrew' Christopher Sly, a...
BOUNDS CHECKING
BOUNDS CHECKING
BOUNDS CHECKING
BOUNDS CHECKING
BOUNDS CHECKING
pl.
of Pound
v. t.
To cause to rebound; to throw so that it will rebound; as, to bound a ball on the floor.
p. p. & a.
Inclosed in a binding or cover; as, a bound volume.
v. t.
To make to bound or leap; as, to bound a horse.
v. t.
To cause to bound or rebound; sometimes, to toss.
n.
Rebound; as, the bound of a ball.
v. t.
To name the boundaries of; as, to bound France.
v. i.
To move with a sudden spring or leap, or with a succession of springs or leaps; as the beast bounded from his den; the herd bounded across the plain.
v. t.
To hunt or chase with hounds, or as with hounds.
p. p. & a.
Constrained or compelled; destined; certain; -- followed by the infinitive; as, he is bound to succeed; he is bound to fail.
p. p. & a.
Resolved; as, I am bound to do it.
pl.
of Pound
p. p & a.
Bound; fastened by bonds.
v. t.
To set on the chase; to incite to pursuit; as, to hounda dog at a hare; to hound on pursuers.
p. p & a.
Under obligation; bound by some favor rendered; obliged; beholden.
pl.
of Pound
imp. & p. p.
of Bound
n.
A sudden leap or bound; a rebound.
interj.
An exclamation contracted from God's wounds; -- used as an oath.
a.
Moving with a bound or bounds.