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Fix mm_mutex locking and unlocking fiasco in clear_all_vars. #1452 (#1455)

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jmpenn 2023-02-10 14:06:27 -06:00 committed by GitHub
parent b2aa92ae81
commit 9478b6a442
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2 changed files with 31 additions and 15 deletions
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27
include/trick/MemoryManager.hh
View File

@ -819,19 +819,37 @@ namespace Trick {
void io_src_delete_class(ALLOC_INFO * alloc_info);
/**
FIXME: I NEED DOCUMENTATION!
Clear the specified primitive or or array of primitives, beginning at the given base_address,
described by attr, and whose specific array element is specified by curr_dim, and offset.
*/
void clear_rvalue( void* base_address, ATTRIBUTES* attr, int curr_dim, int offset);
/**
FIXME: I NEED DOCUMENTATION!
Clear the variable at the given address. That is, set the value(s) of the variable
at the given address to 0, 0.0, NULL, false or "", as appropriate for the type.
The difference between this function and clear_var(void* address) is that this
doesn't contain calls to lock and unlock mm_mutex (which protects the alloc_info_map,
and variable_map). This is meant to only be called from within other "critical-section"
code that is surrounded by mutex lock and unlock.
*/
void clear_var_critical_section(void* address);
/**
Clear the members of the class instance at <address>, and described by <attributes>.
This too is only meant to be called from within other "critical-section" code that
is surrounded by mutex lock and unlock.
*/
void clear_class( char *address, ATTRIBUTES * A);
/**
FIXME: I NEED DOCUMENTATION!
Clear the elements of the array at <address>, described by <attributes>, and whose .
This too is only meant to be called from within other "critical-section" code that
is surrounded by mutex lock and unlock.
*/
void clear_arrayed_class( char* address, ATTRIBUTES* A, int curr_dim, int offset);
/**
FIXME: I NEED DOCUMENTATION!
Write the given alloc_info data structure in a human readable to stdout.
*/
void debug_write_alloc_info( ALLOC_INFO *alloc_info);
@ -849,4 +867,3 @@ extern Trick::MemoryManager* trick_MM;
#endif
#endif

19
trick_source/sim_services/MemoryManager/MemoryManager_clear_memory.cpp
View File

@ -220,12 +220,9 @@ void Trick::MemoryManager::clear_arrayed_class( char* address, ATTRIBUTES* A, in
}
// MEMBER FUNCTION
void Trick::MemoryManager::clear_var( void* address) {
void Trick::MemoryManager::clear_var_critical_section( void* address) {
ATTRIBUTES* reference_attr;
ALLOC_INFO* alloc_info;
pthread_mutex_lock(&mm_mutex);
alloc_info = get_alloc_info_at( address);
if (alloc_info != NULL) {
reference_attr = make_reference_attr( alloc_info);
@ -245,6 +242,12 @@ void Trick::MemoryManager::clear_var( void* address) {
<< "because memory manager knows nothing about it." ;
emitError(message.str());
}
}
// MEMBER FUNCTION
void Trick::MemoryManager::clear_var( void* address) {
pthread_mutex_lock(&mm_mutex);
clear_var_critical_section(address);
pthread_mutex_unlock(&mm_mutex);
}
@ -259,9 +262,7 @@ void Trick::MemoryManager::clear_var( const char* name) {
if (pos != variable_map.end()) {
alloc_info = pos->second;
pthread_mutex_unlock(&mm_mutex);
clear_var( alloc_info->start);
clear_var_critical_section( alloc_info->start);
} else {
std::stringstream message;
message << "Can't clear variable \"" << name
@ -280,9 +281,7 @@ void Trick::MemoryManager::clear_all_vars() {
pthread_mutex_lock(&mm_mutex);
for (pos=alloc_info_map.begin() ; pos!=alloc_info_map.end() ; pos++ ) {
alloc_info = pos->second;
pthread_mutex_unlock(&mm_mutex);
clear_var( alloc_info->start);
clear_var_critical_section( alloc_info->start);
}
pthread_mutex_unlock(&mm_mutex);
}