Visible to Intel only — GUID: GUID-7FFA879C-524A-453E-BD5D-2F3C75E24B38
Package Contents
Parallelizing Simple Loops
Parallelizing Complex Loops
Parallelizing Data Flow and Dependence Graphs
Work Isolation
Exceptions and Cancellation
Floating-point Settings
Containers
Mutual Exclusion
Timing
Memory Allocation
The Task Scheduler
Design Patterns
Migrating from Threading Building Blocks (TBB)
Constrained APIs
Appendix A Costs of Time Slicing
Appendix B Mixing With Other Threading Packages
References
parallel_for_each Body semantics and requirements
parallel_sort ranges interface extension
TBB_malloc_replacement_log Function
Summary
Syntax
Header
Description
Example
Type-specified message keys for join_node
Scalable Memory Pools
Helper Functions for Expressing Graphs
concurrent_lru_cache
task_group extensions
The customizing mutex type for concurrent_hash_map
Visible to Intel only — GUID: GUID-7FFA879C-524A-453E-BD5D-2F3C75E24B38
TBB_malloc_replacement_log Function
NOTE:
This function is for Windows* OS only.
Summary
Provides information about the status of dynamic memory allocation replacement.
Syntax
extern "C" int TBB_malloc_replacement_log(char *** log_ptr);
Header
#include "oneapi/tbb/tbbmalloc_proxy.h"
Description
Dynamic replacement of memory allocation functions on Windows* OS uses in-memory binary instrumentation techniques. To make sure that such instrumentation is safe, oneTBB first searches for a subset of replaced functions in the Visual C++* runtime DLLs and checks if each one has a known bytecode pattern. If any required function is not found or its bytecode pattern is unknown, the replacement is skipped, and the program continues to use the standard memory allocation functions.
The TBB_malloc_replacement_log function allows the program to check if the dynamic memory replacement happens and to get a log of the performed checks.
Returns:
0, if all necessary functions are successfully found and the replacement takes place.
1, otherwise.
The log_ptr parameter must be an address of a char** variable or be NULL. If it is not NULL, the function writes there the address of an array of NULL-terminated strings containing detailed information about the searched functions in the following format:
search_status: function_name (dll_name), byte pattern: <bytecodes>
For more information about the replacement of dynamic memory allocation functions, see Windows* OS C/C++ Dynamic Memory Interface Replacement.
Example
#include "oneapi/tbb/tbbmalloc_proxy.h"
#include <stdio.h>
int main(){
char **func_replacement_log;
int func_replacement_status = TBB_malloc_replacement_log(&func_replacement_log);
if (func_replacement_status != 0) {
printf("tbbmalloc_proxy cannot replace memory allocation routines\n");
for (char** log_string = func_replacement_log; *log_string != 0; log_string++) {
printf("%s\n",*log_string);
}
}
return 0;
}
Example output:
tbbmalloc_proxy cannot replace memory allocation routines Success: free (ucrtbase.dll), byte pattern: <C7442410000000008B4424> Fail: _msize (ucrtbase.dll), byte pattern: <E90B000000CCCCCCCCCCCC>