diff options
Diffstat (limited to 'libc/malloc_debug/Config.cpp')
| -rw-r--r-- | libc/malloc_debug/Config.cpp | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/libc/malloc_debug/Config.cpp b/libc/malloc_debug/Config.cpp index 224bb08ed..032c1fc93 100644 --- a/libc/malloc_debug/Config.cpp +++ b/libc/malloc_debug/Config.cpp @@ -195,9 +195,17 @@ void PropertyParser::LogUsage() { error_log(" Instead, keep XX of these allocations around and then verify"); error_log(" that they have not been modified when the total number of freed"); error_log(" allocations exceeds the XX amount. When the program terminates,"); - error_log(" the rest of these allocations are verified."); + error_log(" the rest of these allocations are verified. When this option is"); + error_log(" enabled, it automatically records the backtrace at the time of the free."); error_log(" The default is to record 100 allocations."); error_log(""); + error_log(" free_track_backtrace_num_frames[=XX]"); + error_log(" This option only has meaning if free_track is set. This indicates"); + error_log(" how many backtrace frames to capture when an allocation is freed."); + error_log(" If XX is set, that is the number of frames to capture. If XX"); + error_log(" is set to zero, then no backtrace will be captured."); + error_log(" The default is to record 16 frames."); + error_log(""); error_log(" leak_track"); error_log(" Enable the leak tracking of memory allocations."); } @@ -245,6 +253,7 @@ bool Config::SetFromProperties() { front_guard_value = PropertyParser::DEFAULT_FRONT_GUARD_VALUE; rear_guard_value = PropertyParser::DEFAULT_REAR_GUARD_VALUE; backtrace_signal = SIGRTMIN + 10; + free_track_backtrace_num_frames = 16; // Parse the options are of the format: // option_name or option_name=XX @@ -286,6 +295,10 @@ bool Config::SetFromProperties() { // fill on free. Feature("free_track", 100, 1, 16384, FREE_TRACK | FILL_ON_FREE, &this->free_track_allocations, nullptr, false), + // Number of backtrace frames to keep when free_track is enabled. If this + // value is set to zero, no backtrace will be kept. + Feature("free_track_backtrace_num_frames", 16, 0, 256, 0, + &this->free_track_backtrace_num_frames, nullptr, false), // Enable printing leaked allocations. Feature("leak_track", 0, 0, 0, LEAK_TRACK | TRACK_ALLOCS, nullptr, nullptr, false), |