Purify Fmm Error
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debugger will stop on every Purify error message, right after the message is displayed and before the error actually occurs in your program: (dbx) stop in purify_stop_here (gdb) break purify_stop_here (xdb) b purify_stop_here This allows you to look at purify options the state of your program before the error actually occurs to investigate its cause. Note that purify tool to detect memory leaks you should never call purify_stop_here() directly from your program; only set a breakpoint on it. ABR Array bounds read WARNING An ABR purify vs valgrind message indicates that your program is about to read a value from before the beginning or after the end of an allocated block. Common causes include: o making an array too small (e.g. failing to account for how to run purify on linux the terminating NULL in a string); o forgetting to multiply by sizeof(type) when allocating for an array of objects; o using an array index too large or negative; o failing to NULL terminate a string; or o being off-by-one in copying elements up or down an array ABW Array bounds write CORRUPTING An ABW message indicates that your program is about to write a value to before the beginning or after the end of an allocated block.
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Common causes include: o making an array too small (e.g. failing to account for the terminating NULL in a string); o forgetting to multiply by sizeof(type) when allocating for an array of objects; o using an array index too large or negative; o failing to NULL terminate a string; or o being off-by-one in copying elements up or down an array. BSR Beyond stack read WARNING A BSR message indicates that a function in your program is about to read beyond the current stack pointer. The data beyond the stack pointer is subject to change without notice, for example if your program takes a context switch or a signal; thus the value read by this access is not reliable. A common cause of a BSR is a function returning a pointer to a local variable that has gone out of scope. If the caller attempts to use that variable, this error may result. To keep the value valid after the called function has returned, make such variables static. BSW Beyond stack write WARNING A BSW message indicates that a function in your program is about to write beyond the stack pointer. Note: unlike other write errors such as ABW, this is not a corrupting error, since it is always legal to write a value beyond the end of the stack. However, values beyond the current stack pointer are subject to c
Slow and Bloated? Use Discover By Rajp-Oracle on Sep 23, 2015 Long ago Purify was my memory access checker of choice. I do
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have fond memories of Purify finding some of my nastiest coding mistakes. how to use purify app I loved it, but slowly it started to look old and tired. Now I use Studio Discover to find purify exclude-libs my mistakes before my customers do. To make it an easy transition from Purify to Discover, I have created a table that maps common Purify errors to Discover errors. Most http://ieng6.ucsd.edu/~cs12x/PurifyErrors.htm of them are quite intuitive, so you should have no problem in transitioning. Purify Description Discover Description ABR Array Bounds Read ABR beyond Array Bound Read ABW Array Bounds Write ABW beyond Array Bound Write BSR Beyond Stack Read SBR beyond Stack frame Bounds Read BSW Beyond Stack Write SBW beyond Stack frame Bounds Write FMM Freeing Mismatched Memory BFM Bad Free https://blogs.oracle.com/raj/entry/tired_of_purify_valgrind_too Memory FMR Free Memory Read FMR Freed Memory Read FMW Free Memory Write FMW Freed Memory Write FNH Freeing Non Heap Memory BFM Bad Free Memory FUM Freeing Unallocated Memory BFM / DFM Bad Free Memory / Double Free Memory IPR Invalid Pointer Read IMR Invalid Memory Read IPW Invalid Pointer Write IMW Invalid Memory Write MIU Memory In Use ALLOC Use Discover Function API MLK Memory Leak LEAK Memory Leak MSE Memory Segment Error IMR / IMW Invalid Memory Read / Write PLK Potential Memory Leak LEAK Warning Potential Memory Leak SBR Stack array Bounds Read ABR beyond Array Bound Read SBW Stack array Bounds Write ABW beyond Array Bound Write UMC Uninitialized Memory Copy no need We suppress UMR for paddings UMR Uninitialized Memory Read UMR Uninitialized Memory Read ZPR Zero Page Read IMR Invalid Memory Read ZPW Zero Page Write IMW Invalid Memory Write Purify does not have these errors that Discover reports, but these are interesting enough to mention here FRP Freed Realloc Parameter OLP Overlapping source and destination PIR Partially Intialized Read AZS Allocating Zero Size Memory Category: O
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