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Crash log: Increase crash log length limit on Unix

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Allocate buffer using mmap if possible
This commit is contained in:
Jonathan G Rennison
2021-12-06 18:58:19 +00:00
parent 90c672fc6d
commit 4543803823
3 changed files with 18 additions and 5 deletions
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9
src/os/unix/crashlog_unix.cpp
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@@ -22,6 +22,7 @@
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/mman.h>
#if defined(WITH_DBG_GDB)
#include <sys/syscall.h>
@@ -585,7 +586,13 @@ static void CDECL HandleCrash(int signum)
#else
CrashLogUnix log(signum);
#endif
log.MakeCrashLog();
const size_t length = 65536 * 16;
char *buffer = (char *)mmap(nullptr, length, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (buffer != MAP_FAILED) {
log.MakeCrashLog(buffer, buffer + length - 1);
} else {
log.MakeCrashLogWithStackBuffer();
}
CrashLog::AfterCrashLogCleanup();
abort();